Gi\u1ea3i th\u00edch v\u1ec1 vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t ngu\u1ed3n \u0111i\u1ec7n: Nh\u1eefng \u0111i\u1ec1u nh\u00e3n m\u00e1c kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn<\/title>\n<\/head>\n<body>\n\n<div class=\"bd-post\">\n<style>\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Manrope:wght@400;600;700&family=Roboto:wght@600;700&display=swap');\n\n.bd-post {\n --prose-width: 720px;\n --gap-attach: 16px;\n --gap-normal: 32px;\n --gap-section: 48px;\n --pad-compact: 16px;\n --pad-standard: 24px;\n --body-bg: #FFFFFF;\n --text-primary: #333333;\n --text-secondary: #6E6E6E;\n --heading-ink: #000000;\n --accent: #479DE2;\n --accent-text: #2A76B4;\n --accent-hot: #FD9649;\n --navy: #0D3972;\n --inverse-bg: #1E1E1E;\n --inverse-text: #FFFFFF;\n --inverse-text-secondary: #B0B0B0;\n --card-fill: #F4F8FC;\n --card-border: #E0E0E0;\n --divider: #C0C0C0;\n --panel-fill: #FAFAFA;\n --btn-white: #FFFFFF;\n --btn-ink: #1E1E1E;\n font-family: \"Manrope\", sans-serif;\n font-size: 16px;\n font-weight: 400;\n line-height: 1.6;\n color: var(--text-primary);\n background: var(--body-bg);\n padding: 40px;\n max-width: 100%;\n box-sizing: border-box;\n}\n.bd-post a { overflow-wrap: anywhere; word-break: break-word; }\n.bd-post p, .bd-post li { overflow-wrap: break-word; }\n.bd-post .bd-post-article { max-width: var(--prose-width); margin: 0 auto; }\n.bd-post [class*=\"bp-\"] { box-sizing: border-box; }\n.bd-post .bd-post-article > .bp-1-hook,\n.bd-post .bd-post-article > .bp-cta-end { margin: var(--gap-section) 0; }\n.bd-post .bd-post-article > .bp-2-read { margin: var(--gap-attach) 0 var(--gap-normal); }\n.bd-post .bd-post-article > .rich-card,\n.bd-post .bd-post-article > .rich-callout { margin: var(--gap-normal) 0; }\n\n.bd-post p { margin: 0 0 1em; }\n.bd-post h1 { font-family: \"Roboto\", sans-serif; font-weight: 600; line-height: 1.2; font-size: 36px; color: var(--heading-ink); margin: 0 0 16px; }\n.bd-post h2 { font-family: \"Roboto\", sans-serif; font-weight: 700; line-height: 1.2; font-size: 34px; color: var(--heading-ink); margin: 48px 0 16px; }\n.bd-post h3 { font-family: \"Roboto\", sans-serif; font-weight: 700; line-height: 1.25; font-size: 24px; color: var(--heading-ink); margin: 32px 0 12px; }\n.bd-post ul, .bd-post ol { margin: 0 0 1em; padding-left: 1.5em; }\n.bd-post li { margin-bottom: 0.5em; }\n.bd-post strong { font-weight: 700; }\n.bd-post em { font-style: italic; }\n.bd-post p a, .bd-post li a, .bd-post blockquote a, .bd-post td a {\n color: var(--accent-text);\n font-weight: 500;\n text-decoration: underline;\n text-decoration-color: var(--accent-text);\n}\n.bd-post p.bd-closer {\n border-left: 4px solid var(--accent);\n padding-left: 16px;\n margin: 24px 0;\n}\n\n\/* --- BP-1: memory hook (dark signature, solid #1) --- *\/\n.bd-post .bp-1-hook {\n background: var(--inverse-bg);\n border-radius: 10px;\n padding: var(--pad-standard);\n display: flex;\n flex-direction: column;\n gap: 4px;\n}\n.bd-post .bp-1-stat {\n font-family: \"Roboto\", sans-serif;\n font-weight: 700;\n font-size: 36px;\n line-height: 1.1;\n color: var(--accent-hot);\n}\n.bd-post .bp-1-ttl {\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 20px;\n line-height: 1.25;\n color: var(--inverse-text);\n}\n.bd-post .bp-1-sub {\n font-size: 15px;\n line-height: 1.5;\n color: var(--inverse-text-secondary);\n}\n\n\/* --- BP-2: reading kit (low callout) --- *\/\n.bd-post .bp-2-read {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-left: 4px solid var(--accent);\n border-radius: 8px;\n padding: var(--pad-compact);\n display: flex;\n flex-direction: column;\n gap: 8px;\n}\n.bd-post .bp-2-title {\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 16px;\n line-height: 1.4;\n color: var(--heading-ink);\n margin: 0;\n}\n.bd-post .bp-2-ic { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; }\n.bd-post .bp-2-row { display: flex; align-items: flex-start; gap: 10px; }\n.bd-post .bp-2-ic-row { flex: 0 0 auto; display: inline-flex; margin-top: 1px; }\n.bd-post .bp-2-ic-row svg { width: 20px; height: 20px; stroke: var(--accent-text); }\n.bd-post .bp-2-txt { font-size: 15px; line-height: 1.5; color: var(--text-primary); }\n\n\/* --- End CTA (colors: cta-states) --- *\/\n.bd-post .bp-cta-end {\n background: var(--navy);\n border-radius: 10px;\n padding: var(--pad-standard);\n display: flex;\n flex-direction: column;\n align-items: flex-start;\n gap: 8px;\n}\n.bd-post .bp-cta-end-ttl {\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 22px;\n line-height: 1.25;\n color: var(--inverse-text);\n margin: 0;\n display: flex;\n align-items: center;\n gap: 10px;\n}\n.bd-post .bd-cta-ic { display: inline-flex; vertical-align: -0.15em; }\n.bd-post .bd-cta-ic svg { width: 20px; height: 20px; stroke: var(--accent-hot); }\n.bd-post .bp-cta-end-sub { font-size: 15px; line-height: 1.5; color: var(--inverse-text-secondary); margin: 0 0 4px; }\n.bd-post .bp-cta-end-btn {\n display: inline-flex;\n align-items: center;\n gap: 8px;\n font-family: \"Manrope\", sans-serif;\n font-weight: 600;\n font-size: 16px;\n line-height: 1;\n text-decoration: none;\n border-radius: 6px;\n padding: 12px 20px;\n background: var(--accent-hot);\n color: var(--btn-ink);\n box-sizing: border-box;\n}\n.bd-post .bp-cta-end-btn:hover { background: var(--btn-white); color: var(--btn-ink); }\n.bd-post .bp-cta-end-btn svg { width: 18px; height: 18px; stroke: currentColor; }\n\n\/* --- Rich elements --- *\/\n.bd-post .rich-card {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n}\n.bd-post .rich-title {\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 15px;\n line-height: 1.4;\n color: var(--accent-text);\n margin: 0 0 8px;\n}\n.bd-post .rich-chart-title {\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 15px;\n line-height: 1.4;\n color: var(--heading-ink);\n margin: 0 0 8px;\n}\n.bd-post .rich-chart-title .rich-title-ic { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; }\n.bd-post .rich-chart-title .rich-title-ic svg { width: 16px; height: 16px; stroke: var(--accent-text); }\n.bd-post .rich-callout {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-left: 4px solid var(--accent);\n border-radius: 8px;\n padding: var(--pad-compact);\n display: flex;\n align-items: flex-start;\n gap: 12px;\n}\n.bd-post .rich-callout-ic { flex: 0 0 auto; display: inline-flex; margin-top: 1px; }\n.bd-post .rich-callout-ic svg { width: 20px; height: 20px; stroke: var(--accent-text); }\n.bd-post .rich-callout-text { font-size: 15px; line-height: 1.6; color: var(--text-primary); }\n.bd-post .rich-checklist { display: flex; flex-direction: column; gap: 10px; }\n.bd-post .rich-checklist-title {\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 18px;\n line-height: 1.4;\n color: var(--heading-ink);\n margin: 0;\n}\n.bd-post .rich-checklist-title .rich-title-ic { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; }\n.bd-post .rich-checklist-title .rich-title-ic svg { width: 20px; height: 20px; stroke: var(--accent-text); }\n.bd-post .rich-check-item { display: flex; align-items: flex-start; gap: 10px; }\n.bd-post .rich-check-ic { flex: 0 0 auto; display: inline-flex; margin-top: 2px; }\n.bd-post .rich-check-ic svg { width: 18px; height: 18px; stroke: var(--accent-text); }\n.bd-post .rich-check-txt { font-size: 15px; line-height: 1.6; color: var(--text-primary); }\n\n.bd-post .table-wrapper {\n border: 1px solid var(--card-border);\n border-radius: 8px;\n overflow-x: auto;\n margin: 0 0 1em;\n}\n.bd-post .table-wrapper table {\n width: 100%;\n border-collapse: collapse;\n font-size: 15px;\n margin: 0;\n}\n.bd-post .table-wrapper th {\n background: var(--panel-fill);\n color: var(--text-primary);\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 15px;\n text-align: left;\n padding: 12px 16px;\n border-bottom: 1px solid var(--divider);\n}\n.bd-post .table-wrapper td {\n color: var(--text-primary);\n padding: 12px 16px;\n border-bottom: 1px solid var(--divider);\n vertical-align: top;\n}\n.bd-post .table-wrapper tr:last-child td { border-bottom: none; }\n.bd-post .table-wrapper tr:hover td:first-child { color: var(--accent-text); }\n.bd-post .rich-card svg text { fill: var(--text-secondary); }\n.bd-post .rich-card svg text.tl-hi { fill: var(--accent-text); }\n.bd-post .rich-table-wrap { margin: var(--gap-normal) 0; }\n\n\/* --- Sanctioned motion --- *\/\n@media (prefers-reduced-motion: no-preference) {\n @supports (animation-timeline: view()) {\n .bd-post .bd-reveal { animation: bd-fade-in linear both; animation-timeline: view(); animation-range: entry 0% entry 35%; }\n @keyframes bd-fade-in { from { opacity: 0; } to { opacity: 1; } }\n }\n .bd-post h2 { transition: color .2s ease-out, transform .2s ease-out; }\n .bd-post h2:hover { color: var(--accent-text); transform: scale(1.02); }\n .bd-post .rich-card { transition: transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .rich-card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-cta-end-btn { transition: transform .2s ease-out, background-color .2s ease-out, color .2s ease-out; }\n .bd-post .bp-cta-end-btn:hover { transform: translateY(-2px); }\n .bd-post .bd-post-article p a, .bd-post .bd-post-article li a, .bd-post .bd-post-article td a { transition: color .2s ease-out, text-decoration-color .2s ease-out; }\n}\n\n@media (max-width: 768px) {\n .bd-post { padding: 16px; }\n .bd-post h1 { font-size: 24px; }\n .bd-post h2 { font-size: 26px; margin-top: 32px; }\n .bd-post h3 { font-size: 20px; margin-top: 24px; }\n .bd-post .bp-1-stat { font-size: 27px; }\n}\n<\/style>\n\n<article class=\"bd-post-article\">\n\n<p>H\u00e3y m\u1edf b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a h\u1ea7u nh\u01b0 b\u1ea5t k\u1ef3 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch n\u00e0o, b\u1ea1n s\u1ebd th\u1ea5y hai con s\u1ed1 d\u01b0\u1eddng nh\u01b0 m\u00e2u thu\u1eabn nhau. Con s\u1ed1 \u0111\u1ea7u ti\u00ean, \u1edf trang b\u00eca, ghi l\u00e0 240 W. Con s\u1ed1 th\u1ee9 hai, n\u1eb1m khu\u1ea5t \u1edf g\u1ea7n cu\u1ed1i t\u00e0i li\u1ec7u, l\u00e0 m\u1ed9t bi\u1ec3u \u0111\u1ed3 cho th\u1ea5y \u1edf nhi\u1ec7t \u0111\u1ed9 70 \u00b0C, c\u00f9ng m\u1ed9t thi\u1ebft b\u1ecb \u0111\u00f3 ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c \u1edf m\u1ee9c kho\u1ea3ng m\u1ed9t n\u1eeda c\u00f4ng su\u1ea5t \u0111\u00f3. C\u1ea3 hai con s\u1ed1 n\u00e0y \u0111\u1ec1u kh\u00f4ng sai: c\u00f4ng su\u1ea5t ghi tr\u00ean nh\u00e3n ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 <em>c\u00f3 \u0111i\u1ec1u ki\u1ec7n<\/em>, v\u00e0 vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t ngu\u1ed3n l\u00e0 nguy\u00ean t\u1eafc c\u1ea7n tu\u00e2n th\u1ee7 khi c\u00e1c \u0111i\u1ec1u ki\u1ec7n tr\u1edf n\u00ean kh\u1eafc nghi\u1ec7t h\u01a1n.<\/p>\n\n<h2>Gi\u1ea3m c\u00f4ng su\u1ea5t ngu\u1ed3n \u0111i\u1ec7n l\u00e0 g\u00ec? Th\u00f4ng s\u1ed1 tr\u00ean nh\u00e3n m\u00e1c ch\u1ec9 l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean<\/h2>\n\n<p>Gi\u1ea3m c\u00f4ng su\u1ea5t l\u00e0 vi\u1ec7c c\u1ed1 \u00fd v\u1eadn h\u00e0nh m\u1ed9t linh ki\u1ec7n \u1edf m\u1ee9c c\u00f4ng su\u1ea5t th\u1ea5p h\u01a1n m\u1ee9c \u0111\u1ecbnh m\u1ee9c danh ngh\u0129a c\u1ee7a n\u00f3 nh\u1eb1m duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 v\u00e0 tu\u1ed5i th\u1ecd trong gi\u1edbi h\u1ea1n an to\u00e0n. \u0110\u1ed1i v\u1edbi b\u1ed9 ngu\u1ed3n, th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt quan tr\u1ecdng th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb d\u01b0\u1edbi d\u1ea1ng m\u1ed9t <strong>\u0111\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t<\/strong>: m\u1ed9t bi\u1ec3u \u0111\u1ed3 th\u1ec3 hi\u1ec7n m\u1ed1i quan h\u1ec7 gi\u1eefa nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng (v\u00e0 \u0111\u00f4i khi l\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o ho\u1eb7c \u0111\u1ed9 cao) v\u1edbi c\u00f4ng su\u1ea5t \u0111\u1ea7u ra m\u00e0 thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 cung c\u1ea5p li\u00ean t\u1ee5c m\u00e0 kh\u00f4ng b\u1ecb qu\u00e1 nhi\u1ec7t (<a href=\"https:\/\/products.pulspower.com\/en\/faq\/meaning-derating\" target=\"_blank\" rel=\"noopener\">PULS<\/a>).<\/p>\n\n<p>T\u1ea1i sao b\u1ed9 ngu\u1ed3n l\u1ea1i c\u1ea7n \u0111i\u1ec1u n\u00e0y? B\u1edfi v\u00ec b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch kh\u00f4ng \u0111\u1ea1t hi\u1ec7u su\u1ea5t 100 %. C\u00e1c t\u1ed5n th\u1ea5t n\u00e0y cu\u1ed1i c\u00f9ng s\u1ebd bi\u1ebfn th\u00e0nh nhi\u1ec7t b\u00ean trong v\u1ecf m\u00e1y, v\u00e0 c\u00e1c linh ki\u1ec7n t\u1ea1o ra c\u0169ng nh\u01b0 h\u1ea5p th\u1ee5 nhi\u1ec7t \u0111\u00f3 \u0111\u1ec1u c\u00f3 gi\u1edbi h\u1ea1n nhi\u1ec7t. C\u00e1c linh ki\u1ec7n d\u1ec5 b\u1ecb hao m\u00f2n, \u0111\u1eb7c bi\u1ec7t l\u00e0 t\u1ee5 \u0111i\u1ec7n \u0111i\u1ec7n ph\u00e2n, s\u1ebd l\u00e3o h\u00f3a nhanh h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u00fang t\u0103ng cao. V\u00ec v\u1eady, nh\u00e0 s\u1ea3n xu\u1ea5t v\u1ebd m\u1ed9t \u0111\u01b0\u1eddng tr\u00ean \u0111\u1ed3 th\u1ecb v\u1edbi n\u1ed9i dung nh\u01b0 sau: <em>V\u1edbi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng nh\u01b0 v\u1eady, m\u1ee9c c\u00f4ng su\u1ea5t n\u00e0y v\u1eabn an to\u00e0n<\/em> (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>).<\/p>\n\n<p>\u0110\u01b0\u1eddng cong c\u00f4ng nghi\u1ec7p \u0111i\u1ec3n h\u00ecnh c\u00f3 d\u1ea1ng nh\u01b0 sau: c\u00f4ng su\u1ea5t \u0111\u1ea7u ra t\u1ed1i \u0111a \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng kho\u1ea3ng 50 \u00b0C, sau \u0111\u00f3 gi\u1ea3m theo \u0111\u01b0\u1eddng th\u1eb3ng xu\u1ed1ng c\u00f2n kho\u1ea3ng 50 % c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c \u1edf 70 \u00b0C (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>). Gi\u00e1 tr\u1ecb ch\u00ednh x\u00e1c c\u1ee7a h\u1eb1ng s\u1ed1 g\u00f3c v\u00e0 \u0111\u1ed9 d\u1ed1c thay \u0111\u1ed5i t\u00f9y theo t\u1eebng lo\u1ea1t d\u1eef li\u1ec7u, v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y ch\u00ednh l\u00e0 n\u1ed9i dung ch\u00ednh c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y.<\/p>\n\n\n<div class=\"rich-card bd-reveal\" role=\"img\" aria-label=\"\u0110\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t theo nhi\u1ec7t \u0111\u1ed9 \u0111i\u1ec3n h\u00ecnh: c\u00f4ng su\u1ea5t t\u1ed1i \u0111a \u1edf 50 \u00b0C, sau \u0111\u00f3 gi\u1ea3m tuy\u1ebfn t\u00ednh xu\u1ed1ng 50% t\u1ea1i 70 \u00b0C\">\n <p class=\"rich-chart-title\">\u0110\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t theo nhi\u1ec7t \u0111\u1ed9 \u0111i\u1ec3n h\u00ecnh c\u1ee7a b\u1ed9 ngu\u1ed3n c\u00f4ng nghi\u1ec7p<\/p>\n <svg viewbox=\"0 0 600 260\" width=\"100%\" height=\"auto\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" role=\"presentation\">\n <line x1=\"70\" y1=\"20\" x2=\"70\" y2=\"200\" stroke=\"var(--divider)\" stroke-width=\"1\"\/>\n <line x1=\"70\" y1=\"200\" x2=\"530\" y2=\"200\" stroke=\"var(--divider)\" stroke-width=\"1\"\/>\n <line x1=\"70\" y1=\"20\" x2=\"530\" y2=\"20\" stroke=\"var(--divider)\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/>\n <line x1=\"70\" y1=\"72\" x2=\"530\" y2=\"72\" stroke=\"var(--divider)\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/>\n <line x1=\"70\" y1=\"125\" x2=\"530\" y2=\"125\" stroke=\"var(--divider)\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/>\n <line x1=\"346\" y1=\"20\" x2=\"346\" y2=\"200\" stroke=\"var(--divider)\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/>\n <polyline points=\"70,20 346,20 438,72 530,125\" fill=\"none\" stroke=\"var(--accent-text)\" stroke-width=\"3\" stroke-linejoin=\"round\" stroke-linecap=\"round\"\/>\n <circle cx=\"438\" cy=\"72\" r=\"4.5\" fill=\"var(--accent-text)\"\/>\n <text x=\"58\" y=\"24\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"end\">100 %<\/text>\n <text x=\"58\" y=\"76\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"end\">75 %<\/text>\n <text x=\"58\" y=\"129\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"end\">50 %<\/text>\n <text x=\"70\" y=\"218\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"middle\">20 \u00b0C<\/text>\n <text x=\"346\" y=\"218\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"middle\">50 \u00b0C<\/text>\n <text x=\"438\" y=\"218\" font-family=\"Manrope, sans-serif\" font-size=\"12\" fill=\"var(--accent-text)\" text-anchor=\"middle\">60 \u00b0C<\/text>\n <text x=\"530\" y=\"218\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"middle\">70 \u00b0C<\/text>\n <text x=\"300\" y=\"250\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"middle\">Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/text>\n <\/svg>\n<\/div>\n\n<p>Tr\u01b0\u1edbc khi \u0111i s\u00e2u h\u01a1n, c\u1ea7n l\u00e0m r\u00f5 m\u1ed9t \u0111i\u1ec1u: thu\u1eadt ng\u1eef \u201cderating\u201d c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ec9 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a d\u00e2y d\u1eabn (theo c\u00e1c b\u1ea3ng hi\u1ec7u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 c\u1ee7a NEC) v\u00e0 \u0111\u1ec3 gi\u1edbi h\u1ea1n c\u00f4ng su\u1ea5t \u0111\u1ea7u ra c\u1ee7a b\u1ed9 bi\u1ebfn t\u1ea7n n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi. B\u00e0i vi\u1ebft n\u00e0y ch\u1ec9 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh ri\u00eang c\u1ee7a b\u1ed9 ngu\u1ed3n: \u0111\u01b0\u1eddng cong quy\u1ebft \u0111\u1ecbnh c\u00f4ng su\u1ea5t th\u1ef1c t\u1ebf m\u00e0 m\u1ed9t b\u1ed9 ngu\u1ed3n 24 V g\u1eafn tr\u00ean thanh DIN trong t\u1ee7 \u0111i\u1ec7n c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 cung c\u1ea5p.<\/p>\n\n<h2>N\u0103m y\u1ebfu t\u1ed1 khi\u1ebfn b\u1ed9 ngu\u1ed3n ph\u1ea3i gi\u1ea3m c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c<\/h2>\n\n<p>Nhi\u1ec7t \u0111\u1ed9 l\u00e0 y\u1ebfu t\u1ed1 k\u00edch ho\u1ea1t ch\u1ee7 y\u1ebfu, nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 duy nh\u1ea5t. B\u1ea5t k\u1ef3 \u0111i\u1ec1u ki\u1ec7n n\u00e0o trong s\u1ed1 n\u0103m \u0111i\u1ec1u ki\u1ec7n sau \u0111\u00e2y c\u0169ng c\u00f3 th\u1ec3 khi\u1ebfn c\u00f4ng su\u1ea5t \u0111\u1ea7u ra th\u1ef1c t\u1ebf gi\u1ea3m xu\u1ed1ng d\u01b0\u1edbi m\u1ee9c ghi tr\u00ean nh\u00e3n hi\u1ec7u:<\/p>\n\n<ol>\n<li><strong>Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng (y\u1ebfu t\u1ed1 ch\u00ednh).<\/strong> Khi nhi\u1ec7t \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 m\u1ee9c nhi\u1ec7t \u0111\u1ed9 khi t\u1ea3i \u0111\u1ea7y, th\u01b0\u1eddng l\u00e0 50 \u00b0C, c\u00f4ng su\u1ea5t \u0111\u1ea7u ra s\u1ebd gi\u1ea3m theo \u0111\u01b0\u1eddng cong. B\u00ean trong m\u1ed9t v\u1ecf b\u1ecdc k\u00edn ho\u1eb7c h\u01b0\u1edbng v\u1ec1 ph\u00eda m\u1eb7t tr\u1eddi, nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed xung quanh thi\u1ebft b\u1ecb c\u1ea5p ngu\u1ed3n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng t\u1eeb 10\u201315 \u00b0C.<\/li>\n<li><strong>\u0110i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u1ea5p.<\/strong> G\u1ea7n m\u1ee9c th\u1ea5p nh\u1ea5t c\u1ee7a d\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o, kho\u1ea3ng 90 VAC \u0111\u1ed1i v\u1edbi c\u00e1c thi\u1ebft b\u1ecb c\u00f3 \u0111\u1ea7u v\u00e0o \u0111a n\u0103ng, b\u1ed9 ngu\u1ed3n s\u1ebd ti\u00eau th\u1ee5 d\u00f2ng \u0111i\u1ec7n l\u1edbn h\u01a1n \u0111\u1ec3 cung c\u1ea5p c\u00f9ng m\u1ed9t c\u00f4ng su\u1ea5t, v\u00e0 b\u1ed9 l\u1ecdc \u0111\u1ea7u v\u00e0o, c\u1ea7u ch\u1ec9nh l\u01b0u v\u00e0 m\u1ea1ch PFC s\u1ebd n\u00f3ng l\u00ean nhi\u1ec1u h\u01a1n. M\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb ch\u1ec9 \u0111\u1ea1t c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c kho\u1ea3ng 80 % khi \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o l\u00e0 90 VAC (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>).<\/li>\n<li><strong>\u0110\u1ed9 cao tr\u00ean 2.000 m.<\/strong> Kh\u00f4ng kh\u00ed lo\u00e3ng h\u01a1n l\u00e0m m\u00e1t k\u00e9m hi\u1ec7u qu\u1ea3 h\u01a1n. \u1ede \u0111\u1ed9 cao tr\u00ean 2.000 m, h\u1ea7u h\u1ebft c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ec1u y\u00eau c\u1ea7u gi\u1ea3m c\u00f4ng su\u1ea5t (t\u1ed1i \u0111a kho\u1ea3ng 5.000 m) (<a href=\"https:\/\/products.pulspower.com\/en\/faq\/meaning-derating\" target=\"_blank\" rel=\"noopener\">PULS<\/a>).<\/li>\n<li><strong>H\u01b0\u1edbng l\u1eafp \u0111\u1eb7t.<\/strong> C\u00e1c thi\u1ebft b\u1ecb l\u00e0m m\u00e1t b\u1eb1ng \u0111\u1ed1i l\u01b0u ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd kh\u00f4ng kh\u00ed n\u00f3ng tho\u00e1t ra ngo\u00e0i qua c\u00e1c khe th\u00f4ng gi\u00f3 tr\u00ean v\u1ecf m\u00e1y. N\u1ebfu l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb theo h\u01b0\u1edbng m\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00f4ng d\u1ef1 \u0111\u1ecbnh \u2013 t\u1ee9c l\u00e0 \u0111\u1eb7t n\u1eb1m ngang thay v\u00ec th\u1eb3ng \u0111\u1ee9ng v\u00e0 c\u00e1c khe th\u00f4ng gi\u00f3 b\u1ecb che k\u00edn \u2013 th\u00ec hi\u1ec7u qu\u1ea3 l\u00e0m m\u00e1t s\u1ebd gi\u1ea3m s\u00fat. Kh\u00f4ng c\u00f3 h\u1ec7 s\u1ed1 \u0111i\u1ec1u ch\u1ec9nh chung n\u00e0o; m\u1ed7i thi\u1ebft b\u1ecb \u0111\u1ec1u c\u00f3 h\u01b0\u1edbng d\u1eabn c\u1ee5 th\u1ec3 v\u1ec1 h\u01b0\u1edbng l\u1eafp \u0111\u1eb7t.<\/li>\n<li><strong>Kh\u1edfi \u0111\u1ed9ng l\u1ea1nh.<\/strong> M\u1ed9t s\u1ed1 linh ki\u1ec7n c\u0169ng gi\u1ea3m c\u00f4ng su\u1ea5t \u1edf \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, xu\u1ed1ng kho\u1ea3ng \u221220 \u00b0C, \u0111\u1ec3 qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng di\u1ec5n ra tr\u01a1n tru v\u00e0 kh\u00f4ng g\u1eb7p tr\u1ee5c tr\u1eb7c. Sau khi \u0111\u00e3 n\u00f3ng m\u00e1y, c\u00f4ng su\u1ea5t t\u1ed1i \u0111a s\u1ebd \u0111\u01b0\u1ee3c kh\u00f4i ph\u1ee5c l\u1ea1i (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>).<\/li>\n<\/ol>\n\n\n<div class=\"rich-table-wrap\">\n <p class=\"rich-title\">T\u1ed5ng quan v\u1ec1 n\u0103m y\u1ebfu t\u1ed1 d\u1eabn \u0111\u1ebfn vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t<\/p>\n <div class=\"table-wrapper\">\n <table>\n <thead>\n <tr><th>C\u01a1 ch\u1ebf k\u00edch ho\u1ea1t<\/th><th>Gi\u00e1 tr\u1ecb ng\u01b0\u1ee1ng \u0111i\u1ec3n h\u00ecnh<\/th><th>\u0110\u1ed9 l\u1edbn \u0111i\u1ec3n h\u00ecnh<\/th><th>Nh\u1eefng vi\u1ec7c b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng (th\u01b0\u1eddng g\u1eb7p nh\u1ea5t)<\/td><td>50 \u00b0C (\u0111i\u1ec3m t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 \u0111i\u1ec3n h\u00ecnh)<\/td><td>Gi\u1ea3m tuy\u1ebfn t\u00ednh xu\u1ed1ng kho\u1ea3ng 50 % \u1edf 70 \u00b0C<\/td><td>K\u00edch th\u01b0\u1edbc d\u1ef1a tr\u00ean nhi\u1ec7t \u0111\u1ed9 m\u00f9a h\u00e8 cao nh\u1ea5t c\u00f3 th\u1ec3 x\u1ea3y ra trong t\u1ee7<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u1ea5p<\/td><td>~90 VAC tr\u00ean c\u00e1c thi\u1ebft b\u1ecb c\u00f3 \u0111\u1ea7u v\u00e0o \u0111a n\u0103ng<\/td><td>~80 % c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c<\/td><td>H\u00e3y ki\u1ec3m tra \u0111i\u1ec7n \u00e1p th\u1ef1c t\u1ebf tr\u00ean \u0111\u01b0\u1eddng d\u00e2y, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c<\/td><\/tr>\n <tr><td>\u0110\u1ed9 cao<\/td><td>Tr\u00ean 2.000 m<\/td><td>C\u1ea7n gi\u1ea3m c\u00f4ng su\u1ea5t, t\u1ed1i \u0111a kho\u1ea3ng 5.000 m<\/td><td>Tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t \u1edf \u0111\u1ed9 cao l\u1edbn, h\u00e3y \u0111\u1ed1i chi\u1ebfu \u0111\u1ed9 cao v\u1edbi bi\u1ec3u \u0111\u1ed3 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/td><\/tr>\n <tr><td>H\u01b0\u1edbng l\u1eafp \u0111\u1eb7t<\/td><td>Kh\u00e1c v\u1edbi v\u1ecb tr\u00ed d\u1ef1 ki\u1ebfn trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/td><td>Kh\u00f4ng c\u00f3 s\u1ed1 chung \u2014 t\u00f9y thu\u1ed9c v\u00e0o t\u1eebng \u0111\u01a1n v\u1ecb<\/td><td>H\u00e3y l\u00e0m theo s\u01a1 \u0111\u1ed3 h\u01b0\u1edbng d\u1eabn trong h\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t<\/td><\/tr>\n <tr><td>Kh\u1edfi \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/td><td>kho\u1ea3ng ~\u221220 \u00b0C<\/td><td>M\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb gi\u1ea3m c\u00f4ng su\u1ea5t khi n\u00f3ng l\u00ean<\/td><td>Cho ph\u00e9p th\u1ef1c hi\u1ec7n qu\u00e1 tr\u00ecnh l\u00e0m n\u00f3ng tr\u01b0\u1edbc khi v\u1eadn h\u00e0nh \u1edf c\u00f4ng su\u1ea5t t\u1ed1i \u0111a t\u1ea1i c\u00e1c nh\u00e0 m\u00e1y kh\u00f4ng c\u00f3 h\u1ec7 th\u1ed1ng s\u01b0\u1edfi<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n<h2>C\u00e1ch \u0111\u1ecdc \u0111\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t v\u00e0 l\u1ef1a ch\u1ecdn ngu\u1ed3n c\u1ea5p \u0111i\u1ec7n ph\u00f9 h\u1ee3p cho v\u1ecf thi\u1ebft b\u1ecb c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n\n<p>\u0110\u00e2y l\u00e0 ph\u1ea7n m\u00e0 h\u1ea7u h\u1ebft c\u00e1c h\u01b0\u1edbng d\u1eabn th\u01b0\u1eddng b\u1ecf qua, nh\u01b0ng l\u1ea1i ch\u00ednh l\u00e0 ph\u1ea7n gi\u00fap b\u1ea1n tr\u00e1nh \u0111\u01b0\u1ee3c t\u00ecnh tr\u1ea1ng t\u1ee7 l\u1ea1nh b\u1ecb m\u1ea5t \u0111i\u1ec7n t\u1ea1m th\u1eddi v\u00e0o m\u1ed7i th\u00e1ng 8. Ba b\u01b0\u1edbc.<\/p>\n\n<p><strong>B\u01b0\u1edbc 1: T\u00ecm \u0111\u01b0\u1eddng cong.<\/strong> D\u1eef li\u1ec7u \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t h\u1ea7u nh\u01b0 lu\u00f4n \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y \u1edf ph\u1ea7n cu\u1ed1i c\u1ee7a b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, ch\u1ee9 kh\u00f4ng ph\u1ea3i trong b\u1ea3n t\u00f3m t\u1eaft ti\u1ebfp th\u1ecb hay trang danh m\u1ee5c t\u00f3m t\u1eaft (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). N\u1ebfu nh\u00e0 cung c\u1ea5p ch\u1ec9 g\u1eedi cho b\u1ea1n m\u1ed9t tr\u00edch \u0111o\u1ea1n danh m\u1ee5c s\u1ea3n ph\u1ea9m d\u00e0i m\u1ed9t trang, th\u00ec \u0111\u01b0\u1eddng cong \u2014 v\u00e0 c\u00f9ng v\u1edbi \u0111\u00f3 l\u00e0 m\u1ee9c \u0111\u00e1nh gi\u00e1 th\u1ef1c t\u1ebf \u2014 s\u1ebd b\u1ecb thi\u1ebfu.<\/p>\n\n\n<div class=\"bp-2-read bd-reveal\">\n <p class=\"bp-2-title\"><span class=\"bp-2-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"var(--accent-text)\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M3 7V5a2 2 0 0 1 2-2h2\"\/><path d=\"M17 3h2a2 2 0 0 1 2 2v2\"\/><path d=\"M21 17v2a2 2 0 0 1-2 2h-2\"\/><path d=\"M7 21H5a2 2 0 0 1-2-2v-2\"\/><line x1=\"7\" x2=\"17\" y1=\"12\" y2=\"12\"\/><\/svg><\/span>\u0110\u1ecdc ba \u0111i\u1ec3m tr\u00ean \u0111\u01b0\u1eddng cong<\/p>\n <div class=\"bp-2-row\"><span class=\"bp-2-ic-row\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M4 15s1-1 4-1 5 2 8 2 4-1 4-1V3s-1 1-4 1-5-2-8-2-4 1-4 1z\"\/><line x1=\"4\" x2=\"4\" y1=\"22\" y2=\"15\"\/><\/svg><\/span><span class=\"bp-2-txt\"><strong>K\u1ebft th\u00fac t\u1eadp<\/strong> \u2014 khi vi\u1ec7c ch\u1edf \u0111\u1ea7y t\u1ea3i kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c ph\u00e9p<\/span><\/div>\n <div class=\"bp-2-row\"><span class=\"bp-2-ic-row\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><polyline points=\"22 17 13.5 8.5 8.5 13.5 2 7\"\/><polyline points=\"16 17 22 17 22 11\"\/><\/svg><\/span><span class=\"bp-2-txt\"><strong>\u0110\u1ed9 d\u1ed1c<\/strong> \u2014 l\u01b0\u1ee3ng c\u00f4ng m\u1ea5t \u0111i tr\u00ean m\u1ed7i \u0111\u1ed9 sau kh\u1edbp g\u1ed1i<\/span><\/div>\n <div class=\"bp-2-row\"><span class=\"bp-2-ic-row\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M8.5 14.5A2.5 2.5 0 0 0 11 12c0-1.38-.5-2-1-3-1.072-2.143-.224-4.054 2-6 .5 2.5 2 4.9 4 6.5 2 1.6 3 3.5 3 5.5a7 7 0 1 1-14 0c0-1.153.433-2.294 1-3a2.5 2.5 0 0 0 2.5 2.5z\"\/><\/svg><\/span><span class=\"bp-2-txt\"><strong>D\u01b0 l\u01b0\u1ee3ng<\/strong> \u2014 nh\u1eefng g\u00ec c\u00f2n l\u1ea1i \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a<\/span><\/div>\n<\/div>\n\n<p><strong>B\u01b0\u1edbc 2: nh\u00e2n, kh\u00f4ng c\u1ed9ng.<\/strong> Khi hai \u0111i\u1ec1u ki\u1ec7n ch\u1ed3ng ch\u00e9o l\u00ean nhau (v\u00ed d\u1ee5: nhi\u1ec7t \u0111\u1ed9 cao c\u1ed9ng v\u1edbi \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u1ea5p), c\u00e1c m\u1ee9c gi\u1ea3m c\u00f4ng su\u1ea5t s\u1ebd \u0111\u01b0\u1ee3c nh\u00e2n l\u00ean ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u1ed9ng l\u1ea1i. M\u1ed9t b\u1ed9 ngu\u1ed3n cung c\u1ea5p 90 % \u1edf 85 VAC v\u00e0 50 % \u1edf 70 \u00b0C s\u1ebd ch\u1ec9 cung c\u1ea5p \u0111\u01b0\u1ee3c 0,9 \u00d7 0,5 = 45 % khi c\u1ea3 hai \u0111i\u1ec1u ki\u1ec7n n\u00e0y x\u1ea3y ra c\u00f9ng l\u00fac. TDK-Lambda \u0111\u01b0a ra v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh: m\u1ed9t b\u1ed9 ngu\u1ed3n 150 W trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n k\u1ebft h\u1ee3p \u0111\u00f3 ch\u1ec9 c\u00f3 th\u1ec3 cung c\u1ea5p kho\u1ea3ng 67,5 W (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>).<\/p>\n\n<p>H\u00e3y th\u1eed tr\u00ean m\u1ed9t t\u1ee7 thi\u1ebft b\u1ecb th\u1ef1c t\u1ebf. M\u1ed9t thi\u1ebft b\u1ecb g\u1eafn tr\u00ean thanh DIN 24 V, 240 W (10 A) \u0111\u01b0\u1ee3c \u0111\u1eb7t trong m\u1ed9t v\u1ecf m\u00e1y c\u00f3 nhi\u1ec7t \u0111\u1ed9 l\u00ean t\u1edbi 60 \u00b0C v\u00e0o m\u1ed9t bu\u1ed5i chi\u1ec1u m\u00f9a h\u00e8. D\u1ef1a tr\u00ean \u0111\u01b0\u1eddng cong \u0111i\u1ec3n h\u00ecnh, c\u00f4ng su\u1ea5t t\u1ed1i \u0111a \u1edf 50 \u00b0C v\u00e0 m\u1ed9t n\u1eeda c\u00f4ng su\u1ea5t \u1edf 70 \u00b0C, thi\u1ebft b\u1ecb n\u00e0y c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u1edf kho\u1ea3ng 75 % t\u1ea1i 60 \u00b0C: kho\u1ea3ng 180 W, ho\u1eb7c 7,5 A. N\u1ebfu t\u1ea3i c\u1ee7a b\u1ea1n ti\u00eau th\u1ee5 8 A li\u00ean t\u1ee5c, th\u00f4ng s\u1ed1 240 W tr\u00ean nh\u00e3n m\u00e1c ch\u1ec9 l\u00e0 con s\u1ed1 tr\u00ean gi\u1ea5y trong t\u1ee7 \u0111\u00f3. B\u1ea1n c\u1ea7n chuy\u1ec3n sang c\u1ea5p c\u00f4ng su\u1ea5t cao h\u01a1n, n\u01a1i m\u1ed9t thi\u1ebft b\u1ecb 480 W \u1edf m\u1ee9c 75 % v\u1eabn c\u00f2n d\u01b0 15 A, ho\u1eb7c h\u1ec7 th\u1ed1ng th\u00f4ng gi\u00f3 th\u1ef1c s\u1ef1.<\/p>\n\n\n<div class=\"rich-callout bd-reveal\">\n <span class=\"rich-callout-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M15 14c.2-1 .7-1.7 1.5-2.5 1-.9 1.5-2.2 1.5-3.5A6 6 0 0 0 6 8c0 1 .2 2.2 1.5 3.5.7.7 1.3 1.5 1.5 2.5\"\/><path d=\"M9 18h6\"\/><path d=\"M10 22h4\"\/><\/svg><\/span>\n <div class=\"rich-callout-text\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf \u2014 Ngu\u1ed3n \u0111i\u1ec7n 24 V, 240 W trong t\u1ee7 c\u00f3 nhi\u1ec7t \u0111\u1ed9 60 \u00b0C: th\u00f4ng s\u1ed1 tr\u00ean nh\u00e3n 10 A \u2192 gi\u1ea3m c\u00f4ng su\u1ea5t xu\u1ed1ng c\u00f2n ~7,5 A (75 % \u1edf 60 \u00b0C tr\u00ean \u0111\u01b0\u1eddng cong ti\u00eau bi\u1ec3u). T\u1ea3i 8 A \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 qu\u00e1 nh\u1ecf theo \u0111\u01b0\u1eddng cong m\u1eb7c d\u00f9 n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi th\u00f4ng s\u1ed1 tr\u00ean nh\u00e3n. Lu\u00f4n x\u00e1c \u0111\u1ecbnh c\u00f4ng su\u1ea5t d\u1ef1a tr\u00ean \u0111\u01b0\u1eddng cong \u1edf nhi\u1ec7t \u0111\u1ed9 x\u1ea5u nh\u1ea5t, kh\u00f4ng d\u1ef1a v\u00e0o trang b\u00eca.<\/div>\n<\/div>\n\n<p><strong>B\u01b0\u1edbc 3: Ki\u1ec3m tra vi\u1ec7c l\u1eafp \u0111\u1eb7t tr\u01b0\u1edbc khi \u0111\u1ed5 l\u1ed7i cho ngu\u1ed3n cung c\u1ea5p.<\/strong> H\u01b0\u1edbng gi\u00f3 v\u00e0 lu\u1ed3ng kh\u00f4ng kh\u00ed l\u1ea1i l\u00e0m thay \u0111\u1ed5i con s\u1ed1 n\u00e0y. H\u1ec7 th\u1ed1ng qu\u1ea1t th\u1ed5i c\u01b0\u1ee1ng b\u1ee9c t\u1ea1o ra s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t: m\u1ed9t b\u1ed9 c\u1ea5p ngu\u1ed3n k\u00edn 550 W cung c\u1ea5p 230 W khi l\u00e0m m\u00e1t b\u1eb1ng \u0111\u1ed1i l\u01b0u, 450 W khi l\u00e0m m\u00e1t b\u1eb1ng d\u1eabn nhi\u1ec7t, v\u00e0 ch\u1ec9 \u0111\u1ea1t c\u00f4ng su\u1ea5t t\u1ed1i \u0111a 550 W khi s\u1eed d\u1ee5ng qu\u1ea1t (<a href=\"https:\/\/forum.digikey.com\/t\/power-supply-thermal-derating-why-a-550-w-supply-may-only-deliver-230-w\/70170\" target=\"_blank\" rel=\"noopener\">Di\u1ec5n \u0111\u00e0n DigiKey<\/a>). Trong th\u1ef1c ti\u1ec5n l\u1eafp r\u00e1p t\u1ee7 \u0111i\u1ec1u khi\u1ec3n, c\u00f3 nh\u1eefng nguy\u00ean t\u1eafc kinh nghi\u1ec7m \u0111\u01b0\u1ee3c truy\u1ec1n tai nhau m\u00e0 c\u00f2n s\u01a1 s\u00e0i h\u01a1n b\u1ea5t k\u1ef3 b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u00e0o: \u201cgi\u1ea3 \u0111\u1ecbnh m\u1ee9c gi\u1ea3m c\u00f4ng su\u1ea5t 50 % n\u1ebfu \u0111\u1eb7t ngu\u1ed3n \u0111i\u1ec7n n\u1eb1m ngang\u201d l\u00e0 m\u1ed9t c\u00e2u n\u00f3i d\u00e2n gian th\u1ef1c s\u1ef1 tr\u00ean c\u00e1c di\u1ec5n \u0111\u00e0n v\u1ec1 t\u1ee7 \u0111i\u1ec1u khi\u1ec3n (<a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/1cj8w5b\/dont_mount_heat_producing_components_on_vertical\/\" target=\"_blank\" rel=\"noopener\">r\/PLC<\/a>, <a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/1lhyju8\/anyone_else_do_this\/\" target=\"_blank\" rel=\"noopener\">r\/PLC<\/a>). B\u1ea3n n\u0103ng \u0111\u1eb1ng sau \u0111i\u1ec1u n\u00e0y l\u00e0 \u0111\u00fang, v\u00ec h\u01b0\u1edbng l\u1eafp \u0111\u1eb7t th\u1ef1c s\u1ef1 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c thi\u1ebft b\u1ecb l\u00e0m m\u00e1t b\u1eb1ng \u0111\u1ed1i l\u01b0u, nh\u01b0ng con s\u1ed1 50 % kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u0111\u1ecbnh lu\u1eadt v\u1eadt l\u00fd. H\u00e3y tham kh\u1ea3o b\u1ea3ng h\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t cho <em>c\u1ee7a b\u1ea1n<\/em> \u0111\u01a1n v\u1ecb.<\/p>\n\n<p>M\u1ed9t \u0111i\u1ec1u n\u1eefa c\u1ea7n l\u01b0u \u00fd: b\u1ed9 ngu\u1ed3n s\u1ebd kh\u00f4ng t\u1ef1 \u0111\u1ed9ng gi\u1ea3m c\u00f4ng su\u1ea5t m\u1ed9t c\u00e1ch \u201cl\u1ecbch s\u1ef1\u201d. N\u1ebfu b\u1ea1n l\u1ea5y c\u00f4ng su\u1ea5t v\u01b0\u1ee3t qu\u00e1 m\u1ee9c cho ph\u00e9p tr\u00ean \u0111\u01b0\u1eddng cong, h\u1ea7u h\u1ebft c\u00e1c thi\u1ebft b\u1ecb s\u1ebd ch\u1ec9 tr\u1edf n\u00ean n\u00f3ng h\u01a1n v\u00e0 l\u00e3o h\u00f3a nhanh h\u01a1n; t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i k\u00e9o d\u00e0i s\u1ebd d\u1eabn \u0111\u1ebfn vi\u1ec7c ng\u1eaft ngu\u1ed3n do qu\u00e1 nhi\u1ec7t ho\u1eb7c chuy\u1ec3n sang ch\u1ebf \u0111\u1ed9 b\u1ea3o v\u1ec7 t\u1ea1m th\u1eddi (<a href=\"https:\/\/products.pulspower.com\/en\/faq\/meaning-derating\" target=\"_blank\" rel=\"noopener\">PULS<\/a>). Nh\u1eefng chuy\u1ebfn \u0111i ng\u1eafn th\u01b0\u1eddng kh\u00f4ng g\u00e2y h\u1ea1i g\u00ec. C\u00f2n nh\u1eefng chuy\u1ebfn \u0111i d\u00e0i m\u1edbi l\u00e0 nguy\u00ean nh\u00e2n khi\u1ebfn t\u1ee5 \u0111i\u1ec7n \u201cch\u1ebft s\u1edbm\u201d.<\/p>\n\n<h2>T\u1ea1i sao hai b\u1ed9 ngu\u1ed3n \u201c100 W\u201d l\u1ea1i cung c\u1ea5p c\u00f4ng su\u1ea5t kh\u00e1c nhau \u1edf c\u00f9ng m\u1ed9t nhi\u1ec7t \u0111\u1ed9?<\/h2>\n\n<p>\u0110\u00e2y l\u00e0 \u0111i\u1ec3m d\u1ec5 khi\u1ebfn ng\u01b0\u1eddi ta l\u1ea7m t\u01b0\u1edfng l\u00e0 m\u1ed9t c\u00e1i b\u1eaby cho \u0111\u1ebfn khi th\u1ef1c s\u1ef1 nh\u1eadn ra: hai b\u1ed9 ngu\u1ed3n c\u00f3 c\u00f4ng su\u1ea5t ghi tr\u00ean nh\u00e3n gi\u1ed1ng h\u1ec7t nhau c\u00f3 th\u1ec3 c\u00f3 c\u00e1c \u0111\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t b\u1eaft \u0111\u1ea7u \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau, v\u00e0 \u1edf m\u1ed9t nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng nh\u1ea5t \u0111\u1ecbnh, ch\u00fang cung c\u1ea5p c\u00f4ng su\u1ea5t r\u1ea5t kh\u00e1c nhau. \u0110\u01b0\u1eddng cong n\u00e0y l\u00e0 m\u1ed9t <em>l\u1ef1a ch\u1ecdn thi\u1ebft k\u1ebf<\/em>, v\u00e0 n\u1ebfu bi\u1ebft c\u00e1ch \u0111\u1ecdc th\u00f4ng tin n\u00e0y, b\u1ea1n s\u1ebd bi\u1ebft ch\u00ednh x\u00e1c m\u00ecnh \u0111ang mua lo\u1ea1i \u201c100 W\u201d n\u00e0o.<\/p>\n\n <img decoding=\"async\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2026\/09\/Power-Supply-Derating.webp\" style=\"width: 512px; height: 384px; max-width: 100%; object-fit: cover; border-radius: 12px; margin: 30px auto; display: block; box-shadow: 10px 10px 60px 0px rgba(210, 221, 224, 0.35); transition: all 0.3s ease; cursor: pointer;\" onmouseover=\"this.style.transform='translateY(-5px) scale(1.03)'; this.style.boxShadow='15px 25px 80px 0px rgba(210, 221, 224, 0.45)'\" onmouseout=\"this.style.transform='translateY(0) scale(1)'; this.style.boxShadow='10px 10px 60px 0px rgba(210, 221, 224, 0.35)'\"> \n\n<h3>M\u1ed9t \u0111\u01b0\u1eddng cong d\u1ed1c l\u00e0 s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 thi\u1ebft k\u1ebf, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t khuy\u1ebft \u0111i\u1ec3m<\/h3>\n\n<p>H\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u01b0\u1eddng cong \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh b\u1edfi ba y\u1ebfu t\u1ed1: ki\u1ebfn tr\u00fac t\u1ea3n nhi\u1ec7t (\u0111\u1ed1i l\u01b0u, d\u1eabn nhi\u1ec7t qua t\u1ea5m \u0111\u1ebf ho\u1eb7c qu\u1ea1t th\u1ed5i), th\u1eddi gian s\u1eed d\u1ee5ng d\u1ef1 ki\u1ebfn c\u1ee7a c\u00e1c t\u1ee5 \u0111i\u1ec7n ph\u00e2n, v\u00e0 c\u00e1c m\u1ee5c ti\u00eau v\u1ec1 k\u00edch th\u01b0\u1edbc v\u00e0 chi ph\u00ed c\u1ee7a s\u1ea3n ph\u1ea9m. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00f4ng ng\u1eebng n\u00e2ng cao m\u1eadt \u0111\u1ed9 c\u00f4ng su\u1ea5t. XP Power c\u00f4ng khai nh\u1eadn \u0111\u1ecbnh r\u1eb1ng ng\u00e0y c\u00e0ng c\u00f3 nhi\u1ec1u b\u1ed9 ngu\u1ed3n AC-DC d\u1ef1a v\u00e0o c\u00e1c th\u00f4ng s\u1ed1 gi\u1ea3m t\u1ea3i \u0111\u1ec3 c\u1ea3i thi\u1ec7n c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt danh \u0111\u1ecbnh (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). N\u00f3i c\u00e1ch kh\u00e1c: \u0111\u1ed9 n\u1ed5i b\u1eadt tr\u00ean trang nh\u1ea5t ng\u00e0y c\u00e0ng t\u0103ng, c\u00f2n nh\u1eefng d\u00f2ng ch\u1eef nh\u1ecf v\u00e0 \u0111\u01b0\u1eddng cong th\u00ec l\u1eb7ng l\u1ebd d\u1ecbch chuy\u1ec3n v\u1ec1 ph\u00eda tr\u01b0\u1edbc.<\/p>\n\n<p>H\u00e3y so s\u00e1nh hai h\u1ecd \u0111\u01b0\u1eddng cong th\u1ef1c t\u1ebf n\u00e0y. Thi\u1ebft k\u1ebf truy\u1ec1n th\u1ed1ng duy tr\u00ec c\u00f4ng su\u1ea5t t\u1ed1i \u0111a \u0111\u1ebfn 50 \u00b0C, sau \u0111\u00f3 gi\u1ea3m xu\u1ed1ng c\u00f2n 50 % \u1edf 70 \u00b0C (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>). M\u1ed9t s\u1ed1 m\u1eabu m\u1edbi h\u01a1n thu\u1ed9c lo\u1ea1i khung m\u1edf v\u00e0 m\u1eadt \u0111\u1ed9 cao \u0111\u00e3 h\u1ea1 \u0111i\u1ec3m t\u1ea3i \u0111\u1ea7y xu\u1ed1ng c\u00f2n 40 \u00b0C v\u00e0 \u0111\u1ea1t 50 % khi nhi\u1ec7t \u0111\u1ed9 l\u00ean \u0111\u1ebfn 60 \u00b0C (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). C\u00f9ng m\u1ed9t nh\u00e3n hi\u1ec7u, nh\u01b0ng l\u1ea1i l\u00e0 m\u1ed9t chi\u1ebfc m\u00e1y ho\u00e0n to\u00e0n kh\u00e1c.<\/p>\n\n<h3>\u0110\u1eb1ng sau \u0111\u01b0\u1eddng cong l\u00e0 cu\u1ed1n s\u1ed5 ghi ch\u00e9p su\u1ed1t \u0111\u1eddi<\/h3>\n\n<p>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng l\u00e0 v\u00ec \u0111\u01b0\u1eddng cong n\u00e0y kh\u00f4ng ph\u1ea3n \u00e1nh s\u1ef1 quan li\u00eau, m\u00e0 l\u00e0 m\u1ed9t h\u1ee3p \u0111\u1ed3ng tr\u1ecdn \u0111\u1eddi. T\u1ee5 \u0111i\u1ec7n ph\u00e2n v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 linh ki\u1ec7n duy nh\u1ea5t c\u00f3 th\u1ec3 b\u1ecb hao m\u00f2n b\u00ean trong b\u1ed9 ngu\u1ed3n, v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a ch\u00fang tu\u00e2n theo m\u1ed9t bi\u1ebfn th\u1ec3 c\u1ee7a quy t\u1eafc kinh nghi\u1ec7m Arrhenius: c\u1ee9 m\u1ed7i 10 \u00b0C gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 c\u1ee7a linh ki\u1ec7n, tu\u1ed5i th\u1ecd d\u1ef1 ki\u1ebfn s\u1ebd t\u0103ng g\u1ea5p \u0111\u00f4i (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>). C\u00e1c k\u1ef9 s\u01b0 \u1ee9ng d\u1ee5ng c\u1ee7a DigiKey ph\u00e2n t\u00edch v\u00ed d\u1ee5 n\u00e0y theo h\u01b0\u1edbng ng\u01b0\u1ee3c l\u1ea1i: m\u1ed9t t\u1ee5 \u0111i\u1ec7n c\u00f3 tu\u1ed5i th\u1ecd \u0111\u1ecbnh m\u1ee9c 2.000 gi\u1edd \u1edf 125 \u00b0C s\u1ebd c\u00f3 tu\u1ed5i th\u1ecd l\u00ean \u0111\u1ebfn h\u00e0ng th\u1eadp k\u1ef7 n\u1ebfu nhi\u1ec7t \u0111\u1ed9 c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c duy tr\u00ec \u1edf m\u1ee9c kho\u1ea3ng 55 \u00b0C (<a href=\"https:\/\/forum.digikey.com\/t\/power-supply-thermal-derating-why-a-550-w-supply-may-only-deliver-230-w\/70170\" target=\"_blank\" rel=\"noopener\">Di\u1ec5n \u0111\u00e0n DigiKey<\/a>). N\u1ebfu li\u00ean t\u1ee5c v\u1eadn h\u00e0nh v\u01b0\u1ee3t qu\u00e1 \u0111\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t, b\u1ea1n s\u1ebd kh\u00f4ng \u201cnh\u1eadn \u0111\u01b0\u1ee3c c\u00f4ng su\u1ea5t b\u1ed5 sung mi\u1ec5n ph\u00ed\u201d: b\u1ea1n \u0111ang \u0111\u00e1nh \u0111\u1ed5i m\u1ee9c c\u00f4ng su\u1ea5t \u0111\u00f3 v\u00e0 l\u00e0m gi\u1ea3m bi\u00ean \u0111\u1ed9 nhi\u1ec7t c\u1ee7a l\u1edbp c\u00e1ch ly (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>).<\/p>\n\n<h3>\u0110\u1ecbnh gi\u00e1 \u0111\u01b0\u1eddng cong c\u00f3 \u0111\u1ed9 d\u1ed1c cao<\/h3>\n\n<p>V\u1eady l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 so s\u00e1nh hai thi\u1ebft b\u1ecb \u201c100 W\u201d? \u1ede nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 40 \u00b0C, thi\u1ebft b\u1ecb c\u00f3 \u0111i\u1ec3m u\u1ed1n t\u1ea1i 50 \u00b0C cung c\u1ea5p c\u00f4ng su\u1ea5t t\u1ed1i \u0111a 100 W. Thi\u1ebft b\u1ecb c\u00f3 \u0111i\u1ec3m u\u1ed1n t\u1ea1i 40 \u00b0C \u0111\u00e3 n\u1eb1m tr\u00ean \u0111\u01b0\u1eddng d\u1ed1c, v\u00e0 theo \u0111\u1ed3 th\u1ecb tr\u00ean, tr\u00ean th\u1ef1c t\u1ebf n\u00f3 l\u00e0 s\u1ea3n ph\u1ea9m c\u00f3 c\u00f4ng su\u1ea5t kho\u1ea3ng 75 W (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). \u0110\u00f3 l\u00e0 s\u1ef1 ch\u00eanh l\u1ec7ch kho\u1ea3ng 25 % v\u1ec1 c\u00f4ng su\u1ea5t th\u1ef1c t\u1ebf gi\u1eefa hai s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c b\u00e1n v\u1edbi c\u00f9ng c\u00f4ng su\u1ea5t t\u00ednh b\u1eb1ng watt, v\u00e0 kho\u1ea3ng c\u00e1ch n\u00e0y c\u00e0ng gia t\u0103ng khi v\u1ecf m\u00e1y n\u00f3ng l\u00ean (xem b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y).<\/p>\n\n\n<div class=\"rich-table-wrap\">\n <p class=\"rich-title\">C\u00e1ch \u0111\u1ecdc nh\u00e3n hi\u1ec7u \u201c100 W\u201d: hai \u0111\u1eb7c t\u00ednh \u0111\u01b0\u1eddng cong \u1edf ba m\u1ee9c nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/p>\n <div class=\"table-wrapper\">\n <table>\n <thead>\n <tr><th>T\u00ednh c\u00e1ch u\u1ed1n l\u01b0\u1ee3n<\/th><th>\u0110i\u1ec3m t\u1ea3i \u0111\u1ea7y \u0111\u1ee7<\/th><th>\u1ede nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 40 \u00b0C<\/th><th>\u1ede nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 60 \u00b0C<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>Th\u00f4ng th\u01b0\u1eddng (\u0111\u1ea7y \u0111\u1ebfn 50 \u00b0C, sau \u0111\u00f3 50 % \u1edf 70 \u00b0C)<\/td><td>50 \u00b0C<\/td><td>100 W<\/td><td>~75 W<\/td><\/tr>\n <tr><td>Ch\u1ebf \u0111\u1ed9 m\u1ea1nh (\u0111\u1ebfn 40 \u00b0C, sau \u0111\u00f3 l\u00e0 50 % \u1edf 60 \u00b0C)<\/td><td>40 \u00b0C<\/td><td>~75 W<\/td><td>~50 W<\/td><\/tr>\n <tr><td>Ch\u1ebf \u0111\u1ed9 b\u1ea3o qu\u1ea3n (\u0111\u1ebfn 50 \u00b0C+, c\u00f3 t\u00f9y ch\u1ecdn qu\u1ea1t th\u1ed5i)<\/td><td>50 \u00b0C tr\u1edf l\u00ean<\/td><td>100 W<\/td><td>Ph\u1ee5 thu\u1ed9c v\u00e0o h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t \u2014 c\u00f3 th\u1ec3 ch\u1ecbu t\u1ea3i 100 W khi s\u1eed d\u1ee5ng qu\u1ea1t<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n\n<div class=\"bp-1-hook bd-reveal\">\n <div class=\"bp-1-stat\">25 %<\/div>\n <div class=\"bp-1-ttl\">C\u00f9ng m\u1ed9t b\u1ea3ng t\u00ean. Nh\u01b0ng kh\u00f4ng ph\u1ea3i c\u00f9ng m\u1ed9t m\u00e1y.<\/div>\n <div class=\"bp-1-sub\">Hai b\u1ed9 ngu\u1ed3n \u201c100 W\u201d, m\u1ed9t b\u1ed9 c\u00f3 c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c khi t\u1ea3i \u0111\u1ea7y \u1edf 50 \u00b0C v\u00e0 m\u1ed9t b\u1ed9 \u1edf 40 \u00b0C, c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch kho\u1ea3ng 25 % c\u00f4ng su\u1ea5t s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 40 \u00b0C \u2014 v\u00e0 kho\u1ea3ng c\u00e1ch n\u00e0y s\u1ebd ng\u00e0y c\u00e0ng gia t\u0103ng khi t\u1ee7 thi\u1ebft b\u1ecb n\u00f3ng l\u00ean.<\/div>\n<\/div>\n\n<h2>H\u00e3y so s\u00e1nh c\u00e1c b\u1ed9 ngu\u1ed3n d\u1ef1a tr\u00ean d\u00f2ng \u0111i\u1ec7n s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00f4ng su\u1ea5t ghi tr\u00ean nh\u00e3n<\/h2>\n\n<p>N\u1ebfu b\u1ea1n chuy\u00ean cung c\u1ea5p, nh\u1eadp kho ho\u1eb7c b\u00e1n l\u1ea1i c\u00e1c b\u1ed9 ngu\u1ed3n, nguy\u00ean t\u1eafc th\u1ef1c t\u1ebf r\u1ea5t \u0111\u01a1n gi\u1ea3n: <strong>H\u00e3y so s\u00e1nh d\u1ef1a tr\u00ean d\u00f2ng \u0111i\u1ec7n l\u00e0m vi\u1ec7c t\u1ea1i nhi\u1ec7t \u0111\u1ed9 s\u1eed d\u1ee5ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u1ef1a tr\u00ean c\u00f4ng su\u1ea5t ghi tr\u00ean nh\u00e3n.<\/strong> M\u1ed9t thi\u1ebft b\u1ecb \u201c240 W\u201d c\u00f3 th\u1ec3 duy tr\u00ec t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 \u1edf 50 \u00b0C v\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u201c240 W\u201d b\u1eaft \u0111\u1ea7u suy gi\u1ea3m hi\u1ec7u su\u1ea5t \u1edf 40 \u00b0C l\u00e0 hai s\u1ea3n ph\u1ea9m kh\u00e1c nhau d\u00f9 c\u00f9ng mang nh\u00e3n hi\u1ec7u; v\u00e0 ng\u01b0\u1eddi mua ch\u1ec9 so s\u00e1nh th\u00f4ng tin tr\u00ean trang b\u00eca ch\u00ednh l\u00e0 ng\u01b0\u1eddi s\u1ebd ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi s\u1ef1 c\u1ed1 h\u1ecfng h\u00f3c trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng.<\/p>\n\n<p>Ba b\u01b0\u1edbc ki\u1ec3m tra sau \u0111\u00e2y s\u1ebd bi\u1ebfn quy t\u1eafc \u0111\u00f3 th\u00e0nh th\u00f3i quen:<\/p>\n\n<ol>\n<li><strong>Lu\u00f4n y\u00eau c\u1ea7u b\u1ea3n th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7.<\/strong> \u0110\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y \u1edf trang cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ea3ng d\u1eef li\u1ec7u \u0111\u1ea7y \u0111\u1ee7; c\u00e1c tr\u00edch \u0111o\u1ea1n t\u1eeb danh m\u1ee5c v\u00e0 c\u00e1c trang t\u00f3m t\u1eaft th\u01b0\u1eddng b\u1ecf qua ph\u1ea7n n\u00e0y (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). M\u1ed9t nh\u00e0 cung c\u1ea5p kh\u00f4ng th\u1ec3 ho\u1eb7c kh\u00f4ng ch\u1ecbu cung c\u1ea5p b\u1ea3n v\u1ebd \u0111\u01b0\u1eddng cong \u0111ang y\u00eau c\u1ea7u b\u1ea1n mua h\u00e0ng ch\u1ec9 d\u1ef1a tr\u00ean ni\u1ec1m tin. Trong \u1ee9ng d\u1ee5ng t\u1ee7 s\u1ea5y n\u00f3ng, ni\u1ec1m tin \u0111\u00f3 s\u1ebd s\u1ee5p \u0111\u1ed5 v\u00e0o kho\u1ea3ng th\u00e1ng 8.<\/li>\n<li><strong>H\u00e3y \u0111\u1ecdc ba \u0111i\u1ec3m sau \u0111\u00e2y.<\/strong> \u0110i\u1ec3m k\u1ebft th\u00fac giai \u0111o\u1ea1n \u1ed5n \u0111\u1ecbnh, \u0111\u1ed9 d\u1ed1c, gi\u00e1 tr\u1ecb d\u01b0 \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a. Ba con s\u1ed1 n\u00e0y cung c\u1ea5p nhi\u1ec1u th\u00f4ng tin h\u01a1n so v\u1edbi c\u00f4ng su\u1ea5t (watt).<\/li>\n<li><strong>H\u00e3y t\u00ednh to\u00e1n k\u1ef9 tr\u01b0\u1edbc khi b\u00e1o gi\u00e1 ho\u1eb7c \u0111\u1eb7t h\u00e0ng.<\/strong> H\u00e3y l\u1ea5y gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 trong t\u1ee7 v\u00e0 d\u00f2ng \u0111i\u1ec7n t\u1ea3i li\u00ean t\u1ee5c trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t c\u1ee7a kh\u00e1ch h\u00e0ng, so s\u00e1nh v\u1edbi \u0111\u01b0\u1eddng cong c\u1ee7a s\u1ea3n ph\u1ea9m \u1ee9ng vi\u00ean, v\u00e0 x\u00e1c nh\u1eadn r\u1eb1ng gi\u00e1 tr\u1ecb \u0111\u00e3 \u0111i\u1ec1u ch\u1ec9nh gi\u1ea3m v\u1eabn \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c t\u1ea3i. N\u00ean d\u1ef1 tr\u00f9 m\u1ed9t kho\u1ea3ng d\u01b0, v\u00ec b\u1ee5i t\u00edch t\u1ee5 v\u00e0 lu\u1ed3ng kh\u00ed b\u1ecb c\u1ea3n tr\u1edf s\u1ebd \u00e2m th\u1ea7m l\u00e0m suy gi\u1ea3m hi\u1ec7u qu\u1ea3 l\u00e0m m\u00e1t trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a thi\u1ebft b\u1ecb (<a href=\"https:\/\/forum.digikey.com\/t\/power-supply-thermal-derating-why-a-550-w-supply-may-only-deliver-230-w\/70170\" target=\"_blank\" rel=\"noopener\">Di\u1ec5n \u0111\u00e0n DigiKey<\/a>).<\/li>\n<\/ol>\n\n\n<div class=\"rich-card rich-checklist bd-reveal\">\n <p class=\"rich-checklist-title\"><span class=\"rich-title-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m3 17 2 2 4-4\"\/><path d=\"m3 7 2 2 4-4\"\/><path d=\"M13 6h8\"\/><path d=\"M13 12h8\"\/><path d=\"M13 18h8\"\/><\/svg><\/span>Danh s\u00e1ch ki\u1ec3m tra l\u1ef1a ch\u1ecdn<\/p>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">\u0110\u00e3 nh\u1eadn \u0111\u01b0\u1ee3c b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7 (bao g\u1ed3m trang bi\u1ec3u \u0111\u1ed3 gi\u1ea3m c\u00f4ng su\u1ea5t)<\/span><\/div>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">\u0110\u00e3 ghi nh\u1eadn \u0111i\u1ec3m b\u00e3o h\u00f2a khi t\u1ea3i \u0111\u1ea7y<\/span><\/div>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">\u0110\u00e3 ghi nh\u1eadn \u0111\u1ed9 d\u1ed1c v\u00e0 nhi\u1ec7t \u0111\u1ed9 d\u01b0 70 \u00b0C<\/span><\/div>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">\u0110\u00e3 x\u00e1c nh\u1eadn v\u1edbi kh\u00e1ch h\u00e0ng v\u1ec1 nhi\u1ec7t \u0111\u1ed9 t\u1ee7 trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t<\/span><\/div>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">D\u00f2ng t\u1ea3i li\u00ean t\u1ee5c \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi gi\u00e1 tr\u1ecb \u0111\u00e3 \u0111i\u1ec1u ch\u1ec9nh gi\u1ea3m<\/span><\/div>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">C\u1ea5p c\u00f4ng su\u1ea5t s\u1ebd t\u0103ng th\u00eam m\u1ed9t b\u1eadc n\u1ebfu thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t trong m\u1ed9t khoang k\u00edn ho\u1eb7c h\u01b0\u1edbng v\u1ec1 ph\u00eda m\u1eb7t tr\u1eddi<\/span><\/div>\n<\/div>\n\n<p>Khi n\u00e0o vi\u1ec7c ch\u1ecdn k\u00edch c\u1ee1 l\u1edbn h\u01a1n l\u1ea1i l\u00e0 sai l\u1ea7m? \u0110\u00f3 l\u00e0 khi m\u00f4i tr\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd: m\u1ed9t ph\u00f2ng \u0111i\u1ec7n c\u00f3 \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, n\u01a1i nhi\u1ec7t \u0111\u1ed9 b\u00ean trong t\u1ee7 \u0111i\u1ec7n kh\u00f4ng bao gi\u1edd v\u01b0\u1ee3t qu\u00e1 50 \u00b0C, ho\u1eb7c khi t\u1ea3i ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi th\u00f4ng s\u1ed1 tr\u00ean nh\u00e3n k\u1ef9 thu\u1eadt. M\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c n\u00e0y l\u00e0 ch\u1ecdn \u0111\u01b0\u1ee3c \u0111\u01b0\u1eddng cong c\u00f4ng su\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a b\u1ea1n, ch\u1ee9 kh\u00f4ng ph\u1ea3i ch\u1ecdn thi\u1ebft b\u1ecb c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt l\u1edbn nh\u1ea5t m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 mua \u0111\u01b0\u1ee3c.<\/p>\n\n<h2>\u00dd ngh\u0129a c\u1ee7a vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 ph\u00e2n ph\u1ed1i v\u00e0 \u0111\u1ea1i l\u00fd b\u00e1n l\u1ebb<\/h2>\n\n<p>C\u00e1c nh\u00e0 ph\u00e2n ph\u1ed1i b\u00e1n nh\u1eefng g\u00ec kh\u00e1ch h\u00e0ng c\u1ee7a h\u1ecd c\u1ea7n trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t, ch\u1ee9 kh\u00f4ng ph\u1ea3i nh\u1eefng g\u00ec th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt h\u1ee9a h\u1eb9n trong tr\u01b0\u1eddng h\u1ee3p t\u1ed1t nh\u1ea5t. Vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t l\u00e0 \u0111i\u1ec3m m\u00e0 hai y\u1ebfu t\u1ed1 n\u00e0y ph\u00e2n k\u1ef3, v\u00e0 m\u1ed7i \u0111i\u1ec3m n\u00eau tr\u00ean \u0111\u1ec1u c\u00f3 m\u1ed9t h\u1ec7 qu\u1ea3 t\u01b0\u01a1ng \u1ee9ng trong kinh doanh.<\/p>\n\n<p>Th\u1ee9 nh\u1ea5t, c\u00e1c s\u1ef1 c\u1ed1 c\u1ee7a kh\u00e1ch h\u00e0ng th\u01b0\u1eddng t\u1eadp trung ch\u00ednh x\u00e1c t\u1ea1i \u0111i\u1ec3m u\u1ed1n c\u1ee7a \u0111\u01b0\u1eddng cong. M\u1ed9t x\u01b0\u1edfng s\u1eeda ch\u1eefa ho\u1eb7c nh\u00e0 s\u1ea3n xu\u1ea5t b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n khi l\u1eafp \u0111\u1eb7t ngu\u1ed3n \u0111i\u1ec7n v\u00e0o t\u1ee7 k\u00edn, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo th\u00f4ng s\u1ed1 tr\u00ean trang \u0111\u1ea7u, s\u1ebd g\u1eb7p ph\u1ea3i c\u00e1c tri\u1ec7u ch\u1ee9ng thi\u1ebfu c\u00f4ng su\u1ea5t trong th\u1eddi ti\u1ebft n\u00f3ng: s\u1ee5t \u00e1p, kh\u1edfi \u0111\u1ed9ng l\u1ea1i, h\u1ecfng h\u00f3c s\u1edbm. \u0110\u00f3 l\u00e0 vi\u1ec7c ph\u1ea3i tr\u1ea3 l\u1ea1i s\u1ea3n ph\u1ea9m, g\u1ecdi d\u1ecbch v\u1ee5 v\u00e0 m\u1ea5t c\u01a1 h\u1ed9i b\u00e1n l\u1ea1i, t\u1ea5t c\u1ea3 \u0111\u1ec1u t\u1eadp trung v\u00e0o c\u00e1c \u1ee9ng d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng k\u00edn n\u00f3ng m\u00e0 \u0111\u01b0\u1eddng cong \u0111\u00e3 d\u1ef1 \u0111o\u00e1n. B\u00e1n s\u1ea3n ph\u1ea9m d\u1ef1a tr\u00ean d\u00f2ng \u0111i\u1ec7n gi\u1ea3m c\u00f4ng su\u1ea5t \u1edf 60 \u00b0C kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 c\u1ea9n tr\u1ecdng qu\u00e1 m\u1ee9c; \u0111\u00f3 l\u00e0 c\u00e1ch tr\u00e1nh nh\u1eefng khi\u1ebfu n\u1ea1i c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c.<\/p>\n\n<p>Th\u1ee9 hai, h\u00e3y d\u1ef1 tr\u1eef c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 c\u00f4ng su\u1ea5t d\u1ef1 ph\u00f2ng. M\u1ed9t danh m\u1ee5c s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp ho\u00e0n to\u00e0n theo c\u00f4ng su\u1ea5t (watt) th\u01b0\u1eddng thi\u1ebfu h\u1ee5t c\u00e1c thi\u1ebft b\u1ecb \u201cph\u00f9 h\u1ee3p v\u1edbi t\u1ee7 n\u00f3ng\u201d, b\u1edfi v\u00ec thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng t\u1ea3i 8 A trong t\u1ee7 c\u00f3 nhi\u1ec7t \u0111\u1ed9 60 \u00b0C s\u1ebd \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n 480 W, ch\u1ee9 kh\u00f4ng ph\u1ea3i 240 W. Khi b\u1ea1n d\u1ef1 tr\u1eef c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m c\u00f3 c\u00f4ng su\u1ea5t cao h\u01a1n b\u00ean c\u1ea1nh c\u00e1c d\u00f2ng ti\u00eau chu\u1ea9n, \u0111\u01a1n h\u00e0ng d\u00e0nh cho m\u00f4i tr\u01b0\u1eddng n\u00f3ng s\u1ebd tr\u1edf th\u00e0nh m\u1eb7t h\u00e0ng c\u00f3 s\u1eb5n thay v\u00ec \u0111\u01a1n h\u00e0ng \u0111\u1eb7t ri\u00eang.<\/p>\n\n<p>Th\u1ee9 ba, h\u00e3y \u0111\u01b0a thu\u1eadt ng\u1eef \u201c25 %\u201d v\u00e0o t\u1eeb v\u1ef1ng b\u00e1o gi\u00e1 c\u1ee7a b\u1ea1n. Khi kh\u00e1ch h\u00e0ng so s\u00e1nh b\u00e1o gi\u00e1 c\u1ee7a b\u1ea1n v\u1edbi m\u1ed9t s\u1ea3n ph\u1ea9m c\u00f9ng c\u00f4ng su\u1ea5t nh\u01b0ng r\u1ebb h\u01a1n, s\u1ef1 kh\u00e1c bi\u1ec7t c\u00f3 th\u1ec3 ch\u1ec9 \u0111\u01a1n thu\u1ea7n n\u1eb1m \u1edf \u0111\u01b0\u1eddng cong hi\u1ec7u su\u1ea5t cao: m\u1ed9t m\u00e1y th\u1ef1c t\u1ebf c\u00f3 c\u00f4ng su\u1ea5t 75 W nh\u01b0ng l\u1ea1i \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n 100 W (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). Vi\u1ec7c gi\u1ea3i th\u00edch v\u1ec1 d\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1ee7 \u0111i\u1ec7n ch\u00ednh l\u00e0 c\u00e1ch b\u1ea1n b\u1ea3o v\u1ec7 m\u1ee9c gi\u00e1 d\u1ef1a tr\u00ean c\u01a1 s\u1edf k\u1ef9 thu\u1eadt, thay v\u00ec so s\u00e1nh gi\u00e1 d\u1ef1a tr\u00ean nh\u1eefng l\u1eadp lu\u1eadn kh\u00f4ng c\u00f3 c\u01a1 s\u1edf.<\/p>\n\n<p>Cu\u1ed1i c\u00f9ng, h\u00e3y coi trang bi\u1ec3u \u0111\u1ed3 l\u00e0 m\u1ed9t b\u1ed9 l\u1ecdc nh\u00e0 cung c\u1ea5p. N\u1ebfu b\u1ea1n kh\u00f4ng th\u1ec3 l\u1ea5y \u0111\u01b0\u1ee3c b\u1ea3ng d\u1eef li\u1ec7u \u0111\u1ea7y \u0111\u1ee7, bao g\u1ed3m c\u1ea3 bi\u1ec3u \u0111\u1ed3, t\u1eeb m\u1ed9t ngu\u1ed3n cung c\u1ea5p, b\u1ea1n \u0111ang ti\u1ebfp nh\u1eadn r\u1ee7i ro li\u00ean quan \u0111\u1ebfn th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt kh\u00f4ng ch\u00ednh x\u00e1c t\u1eeb ngu\u1ed3n \u0111\u00f3 v\u00e0 chuy\u1ec3n giao r\u1ee7i ro \u0111\u00f3 cho kh\u00e1ch h\u00e0ng c\u1ee7a m\u00ecnh. T\u00e0i li\u1ec7u \u0111\u1ea7y \u0111\u1ee7 kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t \u0111i\u1ec1u ti\u1ec7n l\u1ee3i; trong danh m\u1ee5c s\u1ea3n ph\u1ea9m n\u00e0y, n\u00f3 <em>l\u00e0<\/em> th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt.<\/p>\n\n<p class=\"bd-closer\"><em>N\u1ebfu qu\u00fd kh\u00e1ch \u0111ang l\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc cho c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch g\u1eafn tr\u00ean thanh DIN ho\u1eb7c lo\u1ea1i k\u00edn d\u00f9ng cho c\u00e1c t\u1ee7 \u0111i\u1ec7n \u0111ang ho\u1ea1t \u0111\u1ed9ng, s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i <a href=\"https:\/\/www.omch.com\/vi\/switch-mode-power-supply\/\" target=\"_self\">D\u1ea3i ngu\u1ed3n \u0111i\u1ec7n chuy\u1ec3n m\u1ea1ch<\/a> bao g\u1ed3m c\u00e1c thi\u1ebft b\u1ecb nh\u1ecf g\u1ecdn \u0111\u1ebfn c\u00e1c m\u1eabu l\u1eafp tr\u00ean thanh DIN c\u00f4ng su\u1ea5t 480 W, c\u00f3 d\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o r\u1ed9ng 85\u2013264 VAC v\u00e0 t\u1ee5 \u0111i\u1ec7n \u0111\u1ea7u ra ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 \u0111\u1ecbnh m\u1ee9c 105 \u00b0C. S\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i <a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\" target=\"_self\">d\u1ecbch v\u1ee5 t\u01b0 v\u1ea5n l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m<\/a> s\u1ebd \u0111i\u1ec1u ch\u1ec9nh thi\u1ebft b\u1ecb sao cho ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec7t \u0111\u1ed9 th\u1ef1c t\u1ebf b\u00ean trong t\u1ee7 c\u1ee7a b\u1ea1n, ch\u1ee9 kh\u00f4ng ch\u1ec9 d\u1ef1a tr\u00ean c\u00f4ng su\u1ea5t (watt). <a href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">Li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i<\/a> H\u00e3y xem x\u00e9t c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng v\u00e0 bi\u1ec3u \u0111\u1ed3 t\u1ea3i tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng.<\/em><\/p>\n\n\n<div class=\"bp-cta-end bd-reveal\">\n <p class=\"bp-cta-end-ttl\"><span class=\"bd-cta-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m22 2-7 20-4-9-9-4z\"\/><path d=\"M22 2 11 13\"\/><\/svg><\/span>H\u00e3y ch\u1ecdn c\u1ee1 d\u1ef1a v\u00e0o \u0111\u01b0\u1eddng cong, ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u1ef1a v\u00e0o nh\u00e3n m\u00e1c.<\/p>\n <p class=\"bp-cta-end-sub\">Vui l\u00f2ng cung c\u1ea5p nhi\u1ec7t \u0111\u1ed9 c\u1ef1c \u0111\u1ea1i trong t\u1ee7 c\u1ee7a qu\u00fd kh\u00e1ch v\u00e0 t\u1ea3i li\u00ean t\u1ee5c. Ch\u00fang t\u00f4i s\u1ebd l\u1ef1a ch\u1ecdn \u0111\u00fang c\u1ea5p c\u00f4ng su\u1ea5t, m\u1eabu s\u1ea3n ph\u1ea9m v\u00e0 \u0111\u01b0\u1eddng cong tr\u01b0\u1edbc khi ti\u1ebfn h\u00e0nh giao h\u00e0ng.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">G\u1eedi h\u1ed3 s\u01a1 t\u1ea3i c\u1ee7a t\u00f4i<svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M5 12h14\"\/><path d=\"m12 5 7 7-7 7\"\/><\/svg><\/a>\n<\/div>\n\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<ol>\n<li>[XP Power]. \u201cHi\u1ec3u v\u1ec1 c\u00e1c th\u00f4ng s\u1ed1 gi\u1ea3m c\u00f4ng su\u1ea5t c\u1ee7a b\u1ed9 ngu\u1ed3n.\u201d 2024. <a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications<\/a><\/li>\n<li>[TDK-Lambda]. \u201cL\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m gi\u1ea3m c\u00f4ng su\u1ea5t c\u1ee7a b\u1ed9 ngu\u1ed3n?\u201d 2022. <a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html<\/a><\/li>\n<li>[PULS]. \u201cGi\u1ea3m c\u00f4ng su\u1ea5t c\u00f3 ngh\u0129a l\u00e0 g\u00ec trong b\u1ed1i c\u1ea3nh b\u1ed9 ngu\u1ed3n?\u201d (C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p). <a href=\"https:\/\/products.pulspower.com\/en\/faq\/meaning-derating\" target=\"_blank\" rel=\"noopener\">https:\/\/products.pulspower.com\/en\/faq\/meaning-derating<\/a><\/li>\n<li>[Di\u1ec5n \u0111\u00e0n DigiKey]. \u201cGi\u1ea3m c\u00f4ng su\u1ea5t do nhi\u1ec7t c\u1ee7a b\u1ed9 ngu\u1ed3n: T\u1ea1i sao b\u1ed9 ngu\u1ed3n 550 W c\u00f3 th\u1ec3 ch\u1ec9 cung c\u1ea5p \u0111\u01b0\u1ee3c 230 W.\u201d 2023. <a href=\"https:\/\/forum.digikey.com\/t\/power-supply-thermal-derating-why-a-550-w-supply-may-only-deliver-230-w\/70170\" target=\"_blank\" rel=\"noopener\">https:\/\/forum.digikey.com\/t\/power-supply-thermal-derating-why-a-550-w-supply-may-only-deliver-230-w\/70170<\/a><\/li>\n<li>[r\/PLC \u2014 Reddit]. \u201cKh\u00f4ng l\u1eafp c\u00e1c linh ki\u1ec7n t\u1ecfa nhi\u1ec7t l\u00ean thanh DIN d\u1ecdc.\u201d 2024. <a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/1cj8w5b\/dont_mount_heat_producing_components_on_vertical\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.reddit.com\/r\/PLC\/comments\/1cj8w5b\/dont_mount_heat_producing_components_on_vertical\/<\/a><\/li>\n<li>[r\/PLC \u2014 Reddit]. \u201cC\u00f3 ai kh\u00e1c l\u00e0m nh\u01b0 v\u1eady kh\u00f4ng?\u201d 2025. <a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/1lhyju8\/anyone_else_do_this\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.reddit.com\/r\/PLC\/comments\/1lhyju8\/anyone_else_do_this\/<\/a><\/li>\n<li>[OMCH]. \u201cB\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch.\u201d <a href=\"https:\/\/www.omch.com\/vi\/switch-mode-power-supply\/\" target=\"_self\">https:\/\/www.omch.com\/switch-mode-power-supply\/<\/a><\/li>\n<li>[OMCH]. \u201cL\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m.\u201d <a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\" target=\"_self\">https:\/\/www.omch.com\/product-selection\/<\/a><\/li>\n<li>[OMCH]. \u201cLi\u00ean h\u1ec7 v\u1edbi OMCH.\u201d <a href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">https:\/\/www.omch.com\/contact\/<\/a><\/li>\n<li>[OMCH]. \u201cNh\u00e0 s\u1ea3n xu\u1ea5t linh ki\u1ec7n t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p \u2014 OMCH.\u201d <a href=\"https:\/\/www.omch.com\/vi\/\" target=\"_self\">https:\/\/www.omch.com\/<\/a><\/li>\n<\/ol>\n\n<\/article>\n<\/div>\n\n<\/body>\n<\/html>","protected":false},"excerpt":{"rendered":"<p>Gi\u1ea3i th\u00edch v\u1ec1 vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t ngu\u1ed3n \u0111i\u1ec7n: Nh\u1eefng \u0111i\u1ec1u nh\u00e3n m\u00e1c kh\u00f4ng \u0111\u1ec1 c\u1eadp M\u1edf b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch, b\u1ea1n s\u1ebd th\u1ea5y hai con s\u1ed1 d\u01b0\u1eddng nh\u01b0 m\u00e2u thu\u1eabn nhau. Con s\u1ed1 \u0111\u1ea7u ti\u00ean, \u1edf trang \u0111\u1ea7u, ghi l\u00e0 240 W. Con s\u1ed1 th\u1ee9 hai, n\u1eb1m \u1ea9n \u1edf g\u1ea7n cu\u1ed1i, l\u00e0 m\u1ed9t bi\u1ec3u \u0111\u1ed3 cho th\u1ea5y r\u1eb1ng \u1edf 70 \u00b0C, c\u00f9ng m\u1ed9t thi\u1ebft b\u1ecb [\u2026]<\/p>","protected":false},"author":4,"featured_media":12291,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Power Supply Derating: Temperature, Load & Sizing Guide","_seopress_titles_desc":"Learn how temperature, airflow, altitude and load affect power supply output, and use derating curves to size a reliable supply.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-12288","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mmlblog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12288","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/comments?post=12288"}],"version-history":[{"count":1,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12288\/revisions"}],"predecessor-version":[{"id":12292,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12288\/revisions\/12292"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/12291"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=12288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=12288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=12288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":12288,"date":"2026-09-10T05:45:35","date_gmt":"2026-09-10T05:45:35","guid":{"rendered":"https:\/\/www.omch.com\/?p=12288"},"modified":"2026-09-10T05:45:36","modified_gmt":"2026-09-10T05:45:36","slug":"power-supply-derating","status":"publish","type":"post","link":"https:\/\/www.omch.com\/vi\/power-supply-derating\/","title":{"rendered":"Gi\u1ea3i th\u00edch v\u1ec1 vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t ngu\u1ed3n \u0111i\u1ec7n: Nh\u1eefng \u0111i\u1ec1u nh\u00e3n m\u00e1c kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn"},"content":{"rendered":"\n\n\n\n\nGi\u1ea3i th\u00edch v\u1ec1 vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t ngu\u1ed3n \u0111i\u1ec7n: Nh\u1eefng \u0111i\u1ec1u nh\u00e3n m\u00e1c kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn<\/title>\n<\/head>\n<body>\n\n<div class=\"bd-post\">\n<style>\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Manrope:wght@400;600;700&family=Roboto:wght@600;700&display=swap');\n\n.bd-post {\n --prose-width: 720px;\n --gap-attach: 16px;\n --gap-normal: 32px;\n --gap-section: 48px;\n --pad-compact: 16px;\n --pad-standard: 24px;\n --body-bg: #FFFFFF;\n --text-primary: #333333;\n --text-secondary: #6E6E6E;\n --heading-ink: #000000;\n --accent: #479DE2;\n --accent-text: #2A76B4;\n --accent-hot: #FD9649;\n --navy: #0D3972;\n --inverse-bg: #1E1E1E;\n --inverse-text: #FFFFFF;\n --inverse-text-secondary: #B0B0B0;\n --card-fill: #F4F8FC;\n --card-border: #E0E0E0;\n --divider: #C0C0C0;\n --panel-fill: #FAFAFA;\n --btn-white: #FFFFFF;\n --btn-ink: #1E1E1E;\n font-family: \"Manrope\", sans-serif;\n font-size: 16px;\n font-weight: 400;\n line-height: 1.6;\n color: var(--text-primary);\n background: var(--body-bg);\n padding: 40px;\n max-width: 100%;\n box-sizing: border-box;\n}\n.bd-post a { overflow-wrap: anywhere; 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}\n.bd-post .table-wrapper tr:hover td:first-child { color: var(--accent-text); }\n.bd-post .rich-card svg text { fill: var(--text-secondary); }\n.bd-post .rich-card svg text.tl-hi { fill: var(--accent-text); }\n.bd-post .rich-table-wrap { margin: var(--gap-normal) 0; }\n\n\/* --- Sanctioned motion --- *\/\n@media (prefers-reduced-motion: no-preference) {\n @supports (animation-timeline: view()) {\n .bd-post .bd-reveal { animation: bd-fade-in linear both; animation-timeline: view(); animation-range: entry 0% entry 35%; }\n @keyframes bd-fade-in { from { opacity: 0; } to { opacity: 1; } }\n }\n .bd-post h2 { transition: color .2s ease-out, transform .2s ease-out; }\n .bd-post h2:hover { color: var(--accent-text); transform: scale(1.02); }\n .bd-post .rich-card { transition: transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .rich-card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-cta-end-btn { transition: transform .2s ease-out, background-color .2s ease-out, color .2s ease-out; }\n .bd-post .bp-cta-end-btn:hover { transform: translateY(-2px); }\n .bd-post .bd-post-article p a, .bd-post .bd-post-article li a, .bd-post .bd-post-article td a { transition: color .2s ease-out, text-decoration-color .2s ease-out; }\n}\n\n@media (max-width: 768px) {\n .bd-post { padding: 16px; }\n .bd-post h1 { font-size: 24px; }\n .bd-post h2 { font-size: 26px; margin-top: 32px; }\n .bd-post h3 { font-size: 20px; margin-top: 24px; }\n .bd-post .bp-1-stat { font-size: 27px; }\n}\n<\/style>\n\n<article class=\"bd-post-article\">\n\n<p>H\u00e3y m\u1edf b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a h\u1ea7u nh\u01b0 b\u1ea5t k\u1ef3 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch n\u00e0o, b\u1ea1n s\u1ebd th\u1ea5y hai con s\u1ed1 d\u01b0\u1eddng nh\u01b0 m\u00e2u thu\u1eabn nhau. Con s\u1ed1 \u0111\u1ea7u ti\u00ean, \u1edf trang b\u00eca, ghi l\u00e0 240 W. Con s\u1ed1 th\u1ee9 hai, n\u1eb1m khu\u1ea5t \u1edf g\u1ea7n cu\u1ed1i t\u00e0i li\u1ec7u, l\u00e0 m\u1ed9t bi\u1ec3u \u0111\u1ed3 cho th\u1ea5y \u1edf nhi\u1ec7t \u0111\u1ed9 70 \u00b0C, c\u00f9ng m\u1ed9t thi\u1ebft b\u1ecb \u0111\u00f3 ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c \u1edf m\u1ee9c kho\u1ea3ng m\u1ed9t n\u1eeda c\u00f4ng su\u1ea5t \u0111\u00f3. C\u1ea3 hai con s\u1ed1 n\u00e0y \u0111\u1ec1u kh\u00f4ng sai: c\u00f4ng su\u1ea5t ghi tr\u00ean nh\u00e3n ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 <em>c\u00f3 \u0111i\u1ec1u ki\u1ec7n<\/em>, v\u00e0 vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t ngu\u1ed3n l\u00e0 nguy\u00ean t\u1eafc c\u1ea7n tu\u00e2n th\u1ee7 khi c\u00e1c \u0111i\u1ec1u ki\u1ec7n tr\u1edf n\u00ean kh\u1eafc nghi\u1ec7t h\u01a1n.<\/p>\n\n<h2>Gi\u1ea3m c\u00f4ng su\u1ea5t ngu\u1ed3n \u0111i\u1ec7n l\u00e0 g\u00ec? Th\u00f4ng s\u1ed1 tr\u00ean nh\u00e3n m\u00e1c ch\u1ec9 l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean<\/h2>\n\n<p>Gi\u1ea3m c\u00f4ng su\u1ea5t l\u00e0 vi\u1ec7c c\u1ed1 \u00fd v\u1eadn h\u00e0nh m\u1ed9t linh ki\u1ec7n \u1edf m\u1ee9c c\u00f4ng su\u1ea5t th\u1ea5p h\u01a1n m\u1ee9c \u0111\u1ecbnh m\u1ee9c danh ngh\u0129a c\u1ee7a n\u00f3 nh\u1eb1m duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 v\u00e0 tu\u1ed5i th\u1ecd trong gi\u1edbi h\u1ea1n an to\u00e0n. \u0110\u1ed1i v\u1edbi b\u1ed9 ngu\u1ed3n, th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt quan tr\u1ecdng th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb d\u01b0\u1edbi d\u1ea1ng m\u1ed9t <strong>\u0111\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t<\/strong>: m\u1ed9t bi\u1ec3u \u0111\u1ed3 th\u1ec3 hi\u1ec7n m\u1ed1i quan h\u1ec7 gi\u1eefa nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng (v\u00e0 \u0111\u00f4i khi l\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o ho\u1eb7c \u0111\u1ed9 cao) v\u1edbi c\u00f4ng su\u1ea5t \u0111\u1ea7u ra m\u00e0 thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 cung c\u1ea5p li\u00ean t\u1ee5c m\u00e0 kh\u00f4ng b\u1ecb qu\u00e1 nhi\u1ec7t (<a href=\"https:\/\/products.pulspower.com\/en\/faq\/meaning-derating\" target=\"_blank\" rel=\"noopener\">PULS<\/a>).<\/p>\n\n<p>T\u1ea1i sao b\u1ed9 ngu\u1ed3n l\u1ea1i c\u1ea7n \u0111i\u1ec1u n\u00e0y? B\u1edfi v\u00ec b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch kh\u00f4ng \u0111\u1ea1t hi\u1ec7u su\u1ea5t 100 %. C\u00e1c t\u1ed5n th\u1ea5t n\u00e0y cu\u1ed1i c\u00f9ng s\u1ebd bi\u1ebfn th\u00e0nh nhi\u1ec7t b\u00ean trong v\u1ecf m\u00e1y, v\u00e0 c\u00e1c linh ki\u1ec7n t\u1ea1o ra c\u0169ng nh\u01b0 h\u1ea5p th\u1ee5 nhi\u1ec7t \u0111\u00f3 \u0111\u1ec1u c\u00f3 gi\u1edbi h\u1ea1n nhi\u1ec7t. C\u00e1c linh ki\u1ec7n d\u1ec5 b\u1ecb hao m\u00f2n, \u0111\u1eb7c bi\u1ec7t l\u00e0 t\u1ee5 \u0111i\u1ec7n \u0111i\u1ec7n ph\u00e2n, s\u1ebd l\u00e3o h\u00f3a nhanh h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u00fang t\u0103ng cao. V\u00ec v\u1eady, nh\u00e0 s\u1ea3n xu\u1ea5t v\u1ebd m\u1ed9t \u0111\u01b0\u1eddng tr\u00ean \u0111\u1ed3 th\u1ecb v\u1edbi n\u1ed9i dung nh\u01b0 sau: <em>V\u1edbi nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng nh\u01b0 v\u1eady, m\u1ee9c c\u00f4ng su\u1ea5t n\u00e0y v\u1eabn an to\u00e0n<\/em> (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>).<\/p>\n\n<p>\u0110\u01b0\u1eddng cong c\u00f4ng nghi\u1ec7p \u0111i\u1ec3n h\u00ecnh c\u00f3 d\u1ea1ng nh\u01b0 sau: c\u00f4ng su\u1ea5t \u0111\u1ea7u ra t\u1ed1i \u0111a \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng kho\u1ea3ng 50 \u00b0C, sau \u0111\u00f3 gi\u1ea3m theo \u0111\u01b0\u1eddng th\u1eb3ng xu\u1ed1ng c\u00f2n kho\u1ea3ng 50 % c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c \u1edf 70 \u00b0C (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>). Gi\u00e1 tr\u1ecb ch\u00ednh x\u00e1c c\u1ee7a h\u1eb1ng s\u1ed1 g\u00f3c v\u00e0 \u0111\u1ed9 d\u1ed1c thay \u0111\u1ed5i t\u00f9y theo t\u1eebng lo\u1ea1t d\u1eef li\u1ec7u, v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y ch\u00ednh l\u00e0 n\u1ed9i dung ch\u00ednh c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y.<\/p>\n\n\n<div class=\"rich-card bd-reveal\" role=\"img\" aria-label=\"\u0110\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t theo nhi\u1ec7t \u0111\u1ed9 \u0111i\u1ec3n h\u00ecnh: c\u00f4ng su\u1ea5t t\u1ed1i \u0111a \u1edf 50 \u00b0C, sau \u0111\u00f3 gi\u1ea3m tuy\u1ebfn t\u00ednh xu\u1ed1ng 50% t\u1ea1i 70 \u00b0C\">\n <p class=\"rich-chart-title\">\u0110\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t theo nhi\u1ec7t \u0111\u1ed9 \u0111i\u1ec3n h\u00ecnh c\u1ee7a b\u1ed9 ngu\u1ed3n c\u00f4ng nghi\u1ec7p<\/p>\n <svg viewbox=\"0 0 600 260\" width=\"100%\" height=\"auto\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" role=\"presentation\">\n <line x1=\"70\" y1=\"20\" x2=\"70\" y2=\"200\" stroke=\"var(--divider)\" stroke-width=\"1\"\/>\n <line x1=\"70\" y1=\"200\" x2=\"530\" y2=\"200\" stroke=\"var(--divider)\" stroke-width=\"1\"\/>\n <line x1=\"70\" y1=\"20\" x2=\"530\" y2=\"20\" stroke=\"var(--divider)\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/>\n <line x1=\"70\" y1=\"72\" x2=\"530\" y2=\"72\" stroke=\"var(--divider)\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/>\n <line x1=\"70\" y1=\"125\" x2=\"530\" y2=\"125\" stroke=\"var(--divider)\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/>\n <line x1=\"346\" y1=\"20\" x2=\"346\" y2=\"200\" stroke=\"var(--divider)\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/>\n <polyline points=\"70,20 346,20 438,72 530,125\" fill=\"none\" stroke=\"var(--accent-text)\" stroke-width=\"3\" stroke-linejoin=\"round\" stroke-linecap=\"round\"\/>\n <circle cx=\"438\" cy=\"72\" r=\"4.5\" fill=\"var(--accent-text)\"\/>\n <text x=\"58\" y=\"24\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"end\">100 %<\/text>\n <text x=\"58\" y=\"76\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"end\">75 %<\/text>\n <text x=\"58\" y=\"129\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"end\">50 %<\/text>\n <text x=\"70\" y=\"218\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"middle\">20 \u00b0C<\/text>\n <text x=\"346\" y=\"218\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"middle\">50 \u00b0C<\/text>\n <text x=\"438\" y=\"218\" font-family=\"Manrope, sans-serif\" font-size=\"12\" fill=\"var(--accent-text)\" text-anchor=\"middle\">60 \u00b0C<\/text>\n <text x=\"530\" y=\"218\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"middle\">70 \u00b0C<\/text>\n <text x=\"300\" y=\"250\" font-family=\"Manrope, sans-serif\" font-size=\"12\" text-anchor=\"middle\">Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/text>\n <\/svg>\n<\/div>\n\n<p>Tr\u01b0\u1edbc khi \u0111i s\u00e2u h\u01a1n, c\u1ea7n l\u00e0m r\u00f5 m\u1ed9t \u0111i\u1ec1u: thu\u1eadt ng\u1eef \u201cderating\u201d c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ec9 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a d\u00e2y d\u1eabn (theo c\u00e1c b\u1ea3ng hi\u1ec7u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 c\u1ee7a NEC) v\u00e0 \u0111\u1ec3 gi\u1edbi h\u1ea1n c\u00f4ng su\u1ea5t \u0111\u1ea7u ra c\u1ee7a b\u1ed9 bi\u1ebfn t\u1ea7n n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi. B\u00e0i vi\u1ebft n\u00e0y ch\u1ec9 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh ri\u00eang c\u1ee7a b\u1ed9 ngu\u1ed3n: \u0111\u01b0\u1eddng cong quy\u1ebft \u0111\u1ecbnh c\u00f4ng su\u1ea5t th\u1ef1c t\u1ebf m\u00e0 m\u1ed9t b\u1ed9 ngu\u1ed3n 24 V g\u1eafn tr\u00ean thanh DIN trong t\u1ee7 \u0111i\u1ec7n c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 cung c\u1ea5p.<\/p>\n\n<h2>N\u0103m y\u1ebfu t\u1ed1 khi\u1ebfn b\u1ed9 ngu\u1ed3n ph\u1ea3i gi\u1ea3m c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c<\/h2>\n\n<p>Nhi\u1ec7t \u0111\u1ed9 l\u00e0 y\u1ebfu t\u1ed1 k\u00edch ho\u1ea1t ch\u1ee7 y\u1ebfu, nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 duy nh\u1ea5t. B\u1ea5t k\u1ef3 \u0111i\u1ec1u ki\u1ec7n n\u00e0o trong s\u1ed1 n\u0103m \u0111i\u1ec1u ki\u1ec7n sau \u0111\u00e2y c\u0169ng c\u00f3 th\u1ec3 khi\u1ebfn c\u00f4ng su\u1ea5t \u0111\u1ea7u ra th\u1ef1c t\u1ebf gi\u1ea3m xu\u1ed1ng d\u01b0\u1edbi m\u1ee9c ghi tr\u00ean nh\u00e3n hi\u1ec7u:<\/p>\n\n<ol>\n<li><strong>Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng (y\u1ebfu t\u1ed1 ch\u00ednh).<\/strong> Khi nhi\u1ec7t \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 m\u1ee9c nhi\u1ec7t \u0111\u1ed9 khi t\u1ea3i \u0111\u1ea7y, th\u01b0\u1eddng l\u00e0 50 \u00b0C, c\u00f4ng su\u1ea5t \u0111\u1ea7u ra s\u1ebd gi\u1ea3m theo \u0111\u01b0\u1eddng cong. B\u00ean trong m\u1ed9t v\u1ecf b\u1ecdc k\u00edn ho\u1eb7c h\u01b0\u1edbng v\u1ec1 ph\u00eda m\u1eb7t tr\u1eddi, nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed xung quanh thi\u1ebft b\u1ecb c\u1ea5p ngu\u1ed3n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng t\u1eeb 10\u201315 \u00b0C.<\/li>\n<li><strong>\u0110i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u1ea5p.<\/strong> G\u1ea7n m\u1ee9c th\u1ea5p nh\u1ea5t c\u1ee7a d\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o, kho\u1ea3ng 90 VAC \u0111\u1ed1i v\u1edbi c\u00e1c thi\u1ebft b\u1ecb c\u00f3 \u0111\u1ea7u v\u00e0o \u0111a n\u0103ng, b\u1ed9 ngu\u1ed3n s\u1ebd ti\u00eau th\u1ee5 d\u00f2ng \u0111i\u1ec7n l\u1edbn h\u01a1n \u0111\u1ec3 cung c\u1ea5p c\u00f9ng m\u1ed9t c\u00f4ng su\u1ea5t, v\u00e0 b\u1ed9 l\u1ecdc \u0111\u1ea7u v\u00e0o, c\u1ea7u ch\u1ec9nh l\u01b0u v\u00e0 m\u1ea1ch PFC s\u1ebd n\u00f3ng l\u00ean nhi\u1ec1u h\u01a1n. M\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb ch\u1ec9 \u0111\u1ea1t c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c kho\u1ea3ng 80 % khi \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o l\u00e0 90 VAC (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>).<\/li>\n<li><strong>\u0110\u1ed9 cao tr\u00ean 2.000 m.<\/strong> Kh\u00f4ng kh\u00ed lo\u00e3ng h\u01a1n l\u00e0m m\u00e1t k\u00e9m hi\u1ec7u qu\u1ea3 h\u01a1n. \u1ede \u0111\u1ed9 cao tr\u00ean 2.000 m, h\u1ea7u h\u1ebft c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ec1u y\u00eau c\u1ea7u gi\u1ea3m c\u00f4ng su\u1ea5t (t\u1ed1i \u0111a kho\u1ea3ng 5.000 m) (<a href=\"https:\/\/products.pulspower.com\/en\/faq\/meaning-derating\" target=\"_blank\" rel=\"noopener\">PULS<\/a>).<\/li>\n<li><strong>H\u01b0\u1edbng l\u1eafp \u0111\u1eb7t.<\/strong> C\u00e1c thi\u1ebft b\u1ecb l\u00e0m m\u00e1t b\u1eb1ng \u0111\u1ed1i l\u01b0u ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd kh\u00f4ng kh\u00ed n\u00f3ng tho\u00e1t ra ngo\u00e0i qua c\u00e1c khe th\u00f4ng gi\u00f3 tr\u00ean v\u1ecf m\u00e1y. N\u1ebfu l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb theo h\u01b0\u1edbng m\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00f4ng d\u1ef1 \u0111\u1ecbnh \u2013 t\u1ee9c l\u00e0 \u0111\u1eb7t n\u1eb1m ngang thay v\u00ec th\u1eb3ng \u0111\u1ee9ng v\u00e0 c\u00e1c khe th\u00f4ng gi\u00f3 b\u1ecb che k\u00edn \u2013 th\u00ec hi\u1ec7u qu\u1ea3 l\u00e0m m\u00e1t s\u1ebd gi\u1ea3m s\u00fat. Kh\u00f4ng c\u00f3 h\u1ec7 s\u1ed1 \u0111i\u1ec1u ch\u1ec9nh chung n\u00e0o; m\u1ed7i thi\u1ebft b\u1ecb \u0111\u1ec1u c\u00f3 h\u01b0\u1edbng d\u1eabn c\u1ee5 th\u1ec3 v\u1ec1 h\u01b0\u1edbng l\u1eafp \u0111\u1eb7t.<\/li>\n<li><strong>Kh\u1edfi \u0111\u1ed9ng l\u1ea1nh.<\/strong> M\u1ed9t s\u1ed1 linh ki\u1ec7n c\u0169ng gi\u1ea3m c\u00f4ng su\u1ea5t \u1edf \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, xu\u1ed1ng kho\u1ea3ng \u221220 \u00b0C, \u0111\u1ec3 qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng di\u1ec5n ra tr\u01a1n tru v\u00e0 kh\u00f4ng g\u1eb7p tr\u1ee5c tr\u1eb7c. Sau khi \u0111\u00e3 n\u00f3ng m\u00e1y, c\u00f4ng su\u1ea5t t\u1ed1i \u0111a s\u1ebd \u0111\u01b0\u1ee3c kh\u00f4i ph\u1ee5c l\u1ea1i (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>).<\/li>\n<\/ol>\n\n\n<div class=\"rich-table-wrap\">\n <p class=\"rich-title\">T\u1ed5ng quan v\u1ec1 n\u0103m y\u1ebfu t\u1ed1 d\u1eabn \u0111\u1ebfn vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t<\/p>\n <div class=\"table-wrapper\">\n <table>\n <thead>\n <tr><th>C\u01a1 ch\u1ebf k\u00edch ho\u1ea1t<\/th><th>Gi\u00e1 tr\u1ecb ng\u01b0\u1ee1ng \u0111i\u1ec3n h\u00ecnh<\/th><th>\u0110\u1ed9 l\u1edbn \u0111i\u1ec3n h\u00ecnh<\/th><th>Nh\u1eefng vi\u1ec7c b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng (th\u01b0\u1eddng g\u1eb7p nh\u1ea5t)<\/td><td>50 \u00b0C (\u0111i\u1ec3m t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 \u0111i\u1ec3n h\u00ecnh)<\/td><td>Gi\u1ea3m tuy\u1ebfn t\u00ednh xu\u1ed1ng kho\u1ea3ng 50 % \u1edf 70 \u00b0C<\/td><td>K\u00edch th\u01b0\u1edbc d\u1ef1a tr\u00ean nhi\u1ec7t \u0111\u1ed9 m\u00f9a h\u00e8 cao nh\u1ea5t c\u00f3 th\u1ec3 x\u1ea3y ra trong t\u1ee7<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u1ea5p<\/td><td>~90 VAC tr\u00ean c\u00e1c thi\u1ebft b\u1ecb c\u00f3 \u0111\u1ea7u v\u00e0o \u0111a n\u0103ng<\/td><td>~80 % c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c<\/td><td>H\u00e3y ki\u1ec3m tra \u0111i\u1ec7n \u00e1p th\u1ef1c t\u1ebf tr\u00ean \u0111\u01b0\u1eddng d\u00e2y, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c<\/td><\/tr>\n <tr><td>\u0110\u1ed9 cao<\/td><td>Tr\u00ean 2.000 m<\/td><td>C\u1ea7n gi\u1ea3m c\u00f4ng su\u1ea5t, t\u1ed1i \u0111a kho\u1ea3ng 5.000 m<\/td><td>Tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t \u1edf \u0111\u1ed9 cao l\u1edbn, h\u00e3y \u0111\u1ed1i chi\u1ebfu \u0111\u1ed9 cao v\u1edbi bi\u1ec3u \u0111\u1ed3 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/td><\/tr>\n <tr><td>H\u01b0\u1edbng l\u1eafp \u0111\u1eb7t<\/td><td>Kh\u00e1c v\u1edbi v\u1ecb tr\u00ed d\u1ef1 ki\u1ebfn trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/td><td>Kh\u00f4ng c\u00f3 s\u1ed1 chung \u2014 t\u00f9y thu\u1ed9c v\u00e0o t\u1eebng \u0111\u01a1n v\u1ecb<\/td><td>H\u00e3y l\u00e0m theo s\u01a1 \u0111\u1ed3 h\u01b0\u1edbng d\u1eabn trong h\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t<\/td><\/tr>\n <tr><td>Kh\u1edfi \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/td><td>kho\u1ea3ng ~\u221220 \u00b0C<\/td><td>M\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb gi\u1ea3m c\u00f4ng su\u1ea5t khi n\u00f3ng l\u00ean<\/td><td>Cho ph\u00e9p th\u1ef1c hi\u1ec7n qu\u00e1 tr\u00ecnh l\u00e0m n\u00f3ng tr\u01b0\u1edbc khi v\u1eadn h\u00e0nh \u1edf c\u00f4ng su\u1ea5t t\u1ed1i \u0111a t\u1ea1i c\u00e1c nh\u00e0 m\u00e1y kh\u00f4ng c\u00f3 h\u1ec7 th\u1ed1ng s\u01b0\u1edfi<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n<h2>C\u00e1ch \u0111\u1ecdc \u0111\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t v\u00e0 l\u1ef1a ch\u1ecdn ngu\u1ed3n c\u1ea5p \u0111i\u1ec7n ph\u00f9 h\u1ee3p cho v\u1ecf thi\u1ebft b\u1ecb c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n\n<p>\u0110\u00e2y l\u00e0 ph\u1ea7n m\u00e0 h\u1ea7u h\u1ebft c\u00e1c h\u01b0\u1edbng d\u1eabn th\u01b0\u1eddng b\u1ecf qua, nh\u01b0ng l\u1ea1i ch\u00ednh l\u00e0 ph\u1ea7n gi\u00fap b\u1ea1n tr\u00e1nh \u0111\u01b0\u1ee3c t\u00ecnh tr\u1ea1ng t\u1ee7 l\u1ea1nh b\u1ecb m\u1ea5t \u0111i\u1ec7n t\u1ea1m th\u1eddi v\u00e0o m\u1ed7i th\u00e1ng 8. Ba b\u01b0\u1edbc.<\/p>\n\n<p><strong>B\u01b0\u1edbc 1: T\u00ecm \u0111\u01b0\u1eddng cong.<\/strong> D\u1eef li\u1ec7u \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t h\u1ea7u nh\u01b0 lu\u00f4n \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y \u1edf ph\u1ea7n cu\u1ed1i c\u1ee7a b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, ch\u1ee9 kh\u00f4ng ph\u1ea3i trong b\u1ea3n t\u00f3m t\u1eaft ti\u1ebfp th\u1ecb hay trang danh m\u1ee5c t\u00f3m t\u1eaft (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). N\u1ebfu nh\u00e0 cung c\u1ea5p ch\u1ec9 g\u1eedi cho b\u1ea1n m\u1ed9t tr\u00edch \u0111o\u1ea1n danh m\u1ee5c s\u1ea3n ph\u1ea9m d\u00e0i m\u1ed9t trang, th\u00ec \u0111\u01b0\u1eddng cong \u2014 v\u00e0 c\u00f9ng v\u1edbi \u0111\u00f3 l\u00e0 m\u1ee9c \u0111\u00e1nh gi\u00e1 th\u1ef1c t\u1ebf \u2014 s\u1ebd b\u1ecb thi\u1ebfu.<\/p>\n\n\n<div class=\"bp-2-read bd-reveal\">\n <p class=\"bp-2-title\"><span class=\"bp-2-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"var(--accent-text)\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M3 7V5a2 2 0 0 1 2-2h2\"\/><path d=\"M17 3h2a2 2 0 0 1 2 2v2\"\/><path d=\"M21 17v2a2 2 0 0 1-2 2h-2\"\/><path d=\"M7 21H5a2 2 0 0 1-2-2v-2\"\/><line x1=\"7\" x2=\"17\" y1=\"12\" y2=\"12\"\/><\/svg><\/span>\u0110\u1ecdc ba \u0111i\u1ec3m tr\u00ean \u0111\u01b0\u1eddng cong<\/p>\n <div class=\"bp-2-row\"><span class=\"bp-2-ic-row\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M4 15s1-1 4-1 5 2 8 2 4-1 4-1V3s-1 1-4 1-5-2-8-2-4 1-4 1z\"\/><line x1=\"4\" x2=\"4\" y1=\"22\" y2=\"15\"\/><\/svg><\/span><span class=\"bp-2-txt\"><strong>K\u1ebft th\u00fac t\u1eadp<\/strong> \u2014 khi vi\u1ec7c ch\u1edf \u0111\u1ea7y t\u1ea3i kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c ph\u00e9p<\/span><\/div>\n <div class=\"bp-2-row\"><span class=\"bp-2-ic-row\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><polyline points=\"22 17 13.5 8.5 8.5 13.5 2 7\"\/><polyline points=\"16 17 22 17 22 11\"\/><\/svg><\/span><span class=\"bp-2-txt\"><strong>\u0110\u1ed9 d\u1ed1c<\/strong> \u2014 l\u01b0\u1ee3ng c\u00f4ng m\u1ea5t \u0111i tr\u00ean m\u1ed7i \u0111\u1ed9 sau kh\u1edbp g\u1ed1i<\/span><\/div>\n <div class=\"bp-2-row\"><span class=\"bp-2-ic-row\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M8.5 14.5A2.5 2.5 0 0 0 11 12c0-1.38-.5-2-1-3-1.072-2.143-.224-4.054 2-6 .5 2.5 2 4.9 4 6.5 2 1.6 3 3.5 3 5.5a7 7 0 1 1-14 0c0-1.153.433-2.294 1-3a2.5 2.5 0 0 0 2.5 2.5z\"\/><\/svg><\/span><span class=\"bp-2-txt\"><strong>D\u01b0 l\u01b0\u1ee3ng<\/strong> \u2014 nh\u1eefng g\u00ec c\u00f2n l\u1ea1i \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a<\/span><\/div>\n<\/div>\n\n<p><strong>B\u01b0\u1edbc 2: nh\u00e2n, kh\u00f4ng c\u1ed9ng.<\/strong> Khi hai \u0111i\u1ec1u ki\u1ec7n ch\u1ed3ng ch\u00e9o l\u00ean nhau (v\u00ed d\u1ee5: nhi\u1ec7t \u0111\u1ed9 cao c\u1ed9ng v\u1edbi \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u1ea5p), c\u00e1c m\u1ee9c gi\u1ea3m c\u00f4ng su\u1ea5t s\u1ebd \u0111\u01b0\u1ee3c nh\u00e2n l\u00ean ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u1ed9ng l\u1ea1i. M\u1ed9t b\u1ed9 ngu\u1ed3n cung c\u1ea5p 90 % \u1edf 85 VAC v\u00e0 50 % \u1edf 70 \u00b0C s\u1ebd ch\u1ec9 cung c\u1ea5p \u0111\u01b0\u1ee3c 0,9 \u00d7 0,5 = 45 % khi c\u1ea3 hai \u0111i\u1ec1u ki\u1ec7n n\u00e0y x\u1ea3y ra c\u00f9ng l\u00fac. TDK-Lambda \u0111\u01b0a ra v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh: m\u1ed9t b\u1ed9 ngu\u1ed3n 150 W trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n k\u1ebft h\u1ee3p \u0111\u00f3 ch\u1ec9 c\u00f3 th\u1ec3 cung c\u1ea5p kho\u1ea3ng 67,5 W (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>).<\/p>\n\n<p>H\u00e3y th\u1eed tr\u00ean m\u1ed9t t\u1ee7 thi\u1ebft b\u1ecb th\u1ef1c t\u1ebf. M\u1ed9t thi\u1ebft b\u1ecb g\u1eafn tr\u00ean thanh DIN 24 V, 240 W (10 A) \u0111\u01b0\u1ee3c \u0111\u1eb7t trong m\u1ed9t v\u1ecf m\u00e1y c\u00f3 nhi\u1ec7t \u0111\u1ed9 l\u00ean t\u1edbi 60 \u00b0C v\u00e0o m\u1ed9t bu\u1ed5i chi\u1ec1u m\u00f9a h\u00e8. D\u1ef1a tr\u00ean \u0111\u01b0\u1eddng cong \u0111i\u1ec3n h\u00ecnh, c\u00f4ng su\u1ea5t t\u1ed1i \u0111a \u1edf 50 \u00b0C v\u00e0 m\u1ed9t n\u1eeda c\u00f4ng su\u1ea5t \u1edf 70 \u00b0C, thi\u1ebft b\u1ecb n\u00e0y c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u1edf kho\u1ea3ng 75 % t\u1ea1i 60 \u00b0C: kho\u1ea3ng 180 W, ho\u1eb7c 7,5 A. N\u1ebfu t\u1ea3i c\u1ee7a b\u1ea1n ti\u00eau th\u1ee5 8 A li\u00ean t\u1ee5c, th\u00f4ng s\u1ed1 240 W tr\u00ean nh\u00e3n m\u00e1c ch\u1ec9 l\u00e0 con s\u1ed1 tr\u00ean gi\u1ea5y trong t\u1ee7 \u0111\u00f3. B\u1ea1n c\u1ea7n chuy\u1ec3n sang c\u1ea5p c\u00f4ng su\u1ea5t cao h\u01a1n, n\u01a1i m\u1ed9t thi\u1ebft b\u1ecb 480 W \u1edf m\u1ee9c 75 % v\u1eabn c\u00f2n d\u01b0 15 A, ho\u1eb7c h\u1ec7 th\u1ed1ng th\u00f4ng gi\u00f3 th\u1ef1c s\u1ef1.<\/p>\n\n\n<div class=\"rich-callout bd-reveal\">\n <span class=\"rich-callout-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M15 14c.2-1 .7-1.7 1.5-2.5 1-.9 1.5-2.2 1.5-3.5A6 6 0 0 0 6 8c0 1 .2 2.2 1.5 3.5.7.7 1.3 1.5 1.5 2.5\"\/><path d=\"M9 18h6\"\/><path d=\"M10 22h4\"\/><\/svg><\/span>\n <div class=\"rich-callout-text\">V\u00ed d\u1ee5 th\u1ef1c t\u1ebf \u2014 Ngu\u1ed3n \u0111i\u1ec7n 24 V, 240 W trong t\u1ee7 c\u00f3 nhi\u1ec7t \u0111\u1ed9 60 \u00b0C: th\u00f4ng s\u1ed1 tr\u00ean nh\u00e3n 10 A \u2192 gi\u1ea3m c\u00f4ng su\u1ea5t xu\u1ed1ng c\u00f2n ~7,5 A (75 % \u1edf 60 \u00b0C tr\u00ean \u0111\u01b0\u1eddng cong ti\u00eau bi\u1ec3u). T\u1ea3i 8 A \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 qu\u00e1 nh\u1ecf theo \u0111\u01b0\u1eddng cong m\u1eb7c d\u00f9 n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi th\u00f4ng s\u1ed1 tr\u00ean nh\u00e3n. Lu\u00f4n x\u00e1c \u0111\u1ecbnh c\u00f4ng su\u1ea5t d\u1ef1a tr\u00ean \u0111\u01b0\u1eddng cong \u1edf nhi\u1ec7t \u0111\u1ed9 x\u1ea5u nh\u1ea5t, kh\u00f4ng d\u1ef1a v\u00e0o trang b\u00eca.<\/div>\n<\/div>\n\n<p><strong>B\u01b0\u1edbc 3: Ki\u1ec3m tra vi\u1ec7c l\u1eafp \u0111\u1eb7t tr\u01b0\u1edbc khi \u0111\u1ed5 l\u1ed7i cho ngu\u1ed3n cung c\u1ea5p.<\/strong> H\u01b0\u1edbng gi\u00f3 v\u00e0 lu\u1ed3ng kh\u00f4ng kh\u00ed l\u1ea1i l\u00e0m thay \u0111\u1ed5i con s\u1ed1 n\u00e0y. H\u1ec7 th\u1ed1ng qu\u1ea1t th\u1ed5i c\u01b0\u1ee1ng b\u1ee9c t\u1ea1o ra s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t: m\u1ed9t b\u1ed9 c\u1ea5p ngu\u1ed3n k\u00edn 550 W cung c\u1ea5p 230 W khi l\u00e0m m\u00e1t b\u1eb1ng \u0111\u1ed1i l\u01b0u, 450 W khi l\u00e0m m\u00e1t b\u1eb1ng d\u1eabn nhi\u1ec7t, v\u00e0 ch\u1ec9 \u0111\u1ea1t c\u00f4ng su\u1ea5t t\u1ed1i \u0111a 550 W khi s\u1eed d\u1ee5ng qu\u1ea1t (<a href=\"https:\/\/forum.digikey.com\/t\/power-supply-thermal-derating-why-a-550-w-supply-may-only-deliver-230-w\/70170\" target=\"_blank\" rel=\"noopener\">Di\u1ec5n \u0111\u00e0n DigiKey<\/a>). Trong th\u1ef1c ti\u1ec5n l\u1eafp r\u00e1p t\u1ee7 \u0111i\u1ec1u khi\u1ec3n, c\u00f3 nh\u1eefng nguy\u00ean t\u1eafc kinh nghi\u1ec7m \u0111\u01b0\u1ee3c truy\u1ec1n tai nhau m\u00e0 c\u00f2n s\u01a1 s\u00e0i h\u01a1n b\u1ea5t k\u1ef3 b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u00e0o: \u201cgi\u1ea3 \u0111\u1ecbnh m\u1ee9c gi\u1ea3m c\u00f4ng su\u1ea5t 50 % n\u1ebfu \u0111\u1eb7t ngu\u1ed3n \u0111i\u1ec7n n\u1eb1m ngang\u201d l\u00e0 m\u1ed9t c\u00e2u n\u00f3i d\u00e2n gian th\u1ef1c s\u1ef1 tr\u00ean c\u00e1c di\u1ec5n \u0111\u00e0n v\u1ec1 t\u1ee7 \u0111i\u1ec1u khi\u1ec3n (<a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/1cj8w5b\/dont_mount_heat_producing_components_on_vertical\/\" target=\"_blank\" rel=\"noopener\">r\/PLC<\/a>, <a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/1lhyju8\/anyone_else_do_this\/\" target=\"_blank\" rel=\"noopener\">r\/PLC<\/a>). B\u1ea3n n\u0103ng \u0111\u1eb1ng sau \u0111i\u1ec1u n\u00e0y l\u00e0 \u0111\u00fang, v\u00ec h\u01b0\u1edbng l\u1eafp \u0111\u1eb7t th\u1ef1c s\u1ef1 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c thi\u1ebft b\u1ecb l\u00e0m m\u00e1t b\u1eb1ng \u0111\u1ed1i l\u01b0u, nh\u01b0ng con s\u1ed1 50 % kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u0111\u1ecbnh lu\u1eadt v\u1eadt l\u00fd. H\u00e3y tham kh\u1ea3o b\u1ea3ng h\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t cho <em>c\u1ee7a b\u1ea1n<\/em> \u0111\u01a1n v\u1ecb.<\/p>\n\n<p>M\u1ed9t \u0111i\u1ec1u n\u1eefa c\u1ea7n l\u01b0u \u00fd: b\u1ed9 ngu\u1ed3n s\u1ebd kh\u00f4ng t\u1ef1 \u0111\u1ed9ng gi\u1ea3m c\u00f4ng su\u1ea5t m\u1ed9t c\u00e1ch \u201cl\u1ecbch s\u1ef1\u201d. N\u1ebfu b\u1ea1n l\u1ea5y c\u00f4ng su\u1ea5t v\u01b0\u1ee3t qu\u00e1 m\u1ee9c cho ph\u00e9p tr\u00ean \u0111\u01b0\u1eddng cong, h\u1ea7u h\u1ebft c\u00e1c thi\u1ebft b\u1ecb s\u1ebd ch\u1ec9 tr\u1edf n\u00ean n\u00f3ng h\u01a1n v\u00e0 l\u00e3o h\u00f3a nhanh h\u01a1n; t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i k\u00e9o d\u00e0i s\u1ebd d\u1eabn \u0111\u1ebfn vi\u1ec7c ng\u1eaft ngu\u1ed3n do qu\u00e1 nhi\u1ec7t ho\u1eb7c chuy\u1ec3n sang ch\u1ebf \u0111\u1ed9 b\u1ea3o v\u1ec7 t\u1ea1m th\u1eddi (<a href=\"https:\/\/products.pulspower.com\/en\/faq\/meaning-derating\" target=\"_blank\" rel=\"noopener\">PULS<\/a>). Nh\u1eefng chuy\u1ebfn \u0111i ng\u1eafn th\u01b0\u1eddng kh\u00f4ng g\u00e2y h\u1ea1i g\u00ec. C\u00f2n nh\u1eefng chuy\u1ebfn \u0111i d\u00e0i m\u1edbi l\u00e0 nguy\u00ean nh\u00e2n khi\u1ebfn t\u1ee5 \u0111i\u1ec7n \u201cch\u1ebft s\u1edbm\u201d.<\/p>\n\n<h2>T\u1ea1i sao hai b\u1ed9 ngu\u1ed3n \u201c100 W\u201d l\u1ea1i cung c\u1ea5p c\u00f4ng su\u1ea5t kh\u00e1c nhau \u1edf c\u00f9ng m\u1ed9t nhi\u1ec7t \u0111\u1ed9?<\/h2>\n\n<p>\u0110\u00e2y l\u00e0 \u0111i\u1ec3m d\u1ec5 khi\u1ebfn ng\u01b0\u1eddi ta l\u1ea7m t\u01b0\u1edfng l\u00e0 m\u1ed9t c\u00e1i b\u1eaby cho \u0111\u1ebfn khi th\u1ef1c s\u1ef1 nh\u1eadn ra: hai b\u1ed9 ngu\u1ed3n c\u00f3 c\u00f4ng su\u1ea5t ghi tr\u00ean nh\u00e3n gi\u1ed1ng h\u1ec7t nhau c\u00f3 th\u1ec3 c\u00f3 c\u00e1c \u0111\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t b\u1eaft \u0111\u1ea7u \u1edf c\u00e1c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau, v\u00e0 \u1edf m\u1ed9t nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng nh\u1ea5t \u0111\u1ecbnh, ch\u00fang cung c\u1ea5p c\u00f4ng su\u1ea5t r\u1ea5t kh\u00e1c nhau. \u0110\u01b0\u1eddng cong n\u00e0y l\u00e0 m\u1ed9t <em>l\u1ef1a ch\u1ecdn thi\u1ebft k\u1ebf<\/em>, v\u00e0 n\u1ebfu bi\u1ebft c\u00e1ch \u0111\u1ecdc th\u00f4ng tin n\u00e0y, b\u1ea1n s\u1ebd bi\u1ebft ch\u00ednh x\u00e1c m\u00ecnh \u0111ang mua lo\u1ea1i \u201c100 W\u201d n\u00e0o.<\/p>\n\n <img decoding=\"async\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2026\/09\/Power-Supply-Derating.webp\" style=\"width: 512px; height: 384px; max-width: 100%; object-fit: cover; border-radius: 12px; margin: 30px auto; display: block; box-shadow: 10px 10px 60px 0px rgba(210, 221, 224, 0.35); transition: all 0.3s ease; cursor: pointer;\" onmouseover=\"this.style.transform='translateY(-5px) scale(1.03)'; this.style.boxShadow='15px 25px 80px 0px rgba(210, 221, 224, 0.45)'\" onmouseout=\"this.style.transform='translateY(0) scale(1)'; this.style.boxShadow='10px 10px 60px 0px rgba(210, 221, 224, 0.35)'\"> \n\n<h3>M\u1ed9t \u0111\u01b0\u1eddng cong d\u1ed1c l\u00e0 s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 thi\u1ebft k\u1ebf, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t khuy\u1ebft \u0111i\u1ec3m<\/h3>\n\n<p>H\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u01b0\u1eddng cong \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh b\u1edfi ba y\u1ebfu t\u1ed1: ki\u1ebfn tr\u00fac t\u1ea3n nhi\u1ec7t (\u0111\u1ed1i l\u01b0u, d\u1eabn nhi\u1ec7t qua t\u1ea5m \u0111\u1ebf ho\u1eb7c qu\u1ea1t th\u1ed5i), th\u1eddi gian s\u1eed d\u1ee5ng d\u1ef1 ki\u1ebfn c\u1ee7a c\u00e1c t\u1ee5 \u0111i\u1ec7n ph\u00e2n, v\u00e0 c\u00e1c m\u1ee5c ti\u00eau v\u1ec1 k\u00edch th\u01b0\u1edbc v\u00e0 chi ph\u00ed c\u1ee7a s\u1ea3n ph\u1ea9m. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00f4ng ng\u1eebng n\u00e2ng cao m\u1eadt \u0111\u1ed9 c\u00f4ng su\u1ea5t. XP Power c\u00f4ng khai nh\u1eadn \u0111\u1ecbnh r\u1eb1ng ng\u00e0y c\u00e0ng c\u00f3 nhi\u1ec1u b\u1ed9 ngu\u1ed3n AC-DC d\u1ef1a v\u00e0o c\u00e1c th\u00f4ng s\u1ed1 gi\u1ea3m t\u1ea3i \u0111\u1ec3 c\u1ea3i thi\u1ec7n c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt danh \u0111\u1ecbnh (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). N\u00f3i c\u00e1ch kh\u00e1c: \u0111\u1ed9 n\u1ed5i b\u1eadt tr\u00ean trang nh\u1ea5t ng\u00e0y c\u00e0ng t\u0103ng, c\u00f2n nh\u1eefng d\u00f2ng ch\u1eef nh\u1ecf v\u00e0 \u0111\u01b0\u1eddng cong th\u00ec l\u1eb7ng l\u1ebd d\u1ecbch chuy\u1ec3n v\u1ec1 ph\u00eda tr\u01b0\u1edbc.<\/p>\n\n<p>H\u00e3y so s\u00e1nh hai h\u1ecd \u0111\u01b0\u1eddng cong th\u1ef1c t\u1ebf n\u00e0y. Thi\u1ebft k\u1ebf truy\u1ec1n th\u1ed1ng duy tr\u00ec c\u00f4ng su\u1ea5t t\u1ed1i \u0111a \u0111\u1ebfn 50 \u00b0C, sau \u0111\u00f3 gi\u1ea3m xu\u1ed1ng c\u00f2n 50 % \u1edf 70 \u00b0C (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>). M\u1ed9t s\u1ed1 m\u1eabu m\u1edbi h\u01a1n thu\u1ed9c lo\u1ea1i khung m\u1edf v\u00e0 m\u1eadt \u0111\u1ed9 cao \u0111\u00e3 h\u1ea1 \u0111i\u1ec3m t\u1ea3i \u0111\u1ea7y xu\u1ed1ng c\u00f2n 40 \u00b0C v\u00e0 \u0111\u1ea1t 50 % khi nhi\u1ec7t \u0111\u1ed9 l\u00ean \u0111\u1ebfn 60 \u00b0C (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). C\u00f9ng m\u1ed9t nh\u00e3n hi\u1ec7u, nh\u01b0ng l\u1ea1i l\u00e0 m\u1ed9t chi\u1ebfc m\u00e1y ho\u00e0n to\u00e0n kh\u00e1c.<\/p>\n\n<h3>\u0110\u1eb1ng sau \u0111\u01b0\u1eddng cong l\u00e0 cu\u1ed1n s\u1ed5 ghi ch\u00e9p su\u1ed1t \u0111\u1eddi<\/h3>\n\n<p>L\u00fd do \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng l\u00e0 v\u00ec \u0111\u01b0\u1eddng cong n\u00e0y kh\u00f4ng ph\u1ea3n \u00e1nh s\u1ef1 quan li\u00eau, m\u00e0 l\u00e0 m\u1ed9t h\u1ee3p \u0111\u1ed3ng tr\u1ecdn \u0111\u1eddi. T\u1ee5 \u0111i\u1ec7n ph\u00e2n v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 linh ki\u1ec7n duy nh\u1ea5t c\u00f3 th\u1ec3 b\u1ecb hao m\u00f2n b\u00ean trong b\u1ed9 ngu\u1ed3n, v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a ch\u00fang tu\u00e2n theo m\u1ed9t bi\u1ebfn th\u1ec3 c\u1ee7a quy t\u1eafc kinh nghi\u1ec7m Arrhenius: c\u1ee9 m\u1ed7i 10 \u00b0C gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 c\u1ee7a linh ki\u1ec7n, tu\u1ed5i th\u1ecd d\u1ef1 ki\u1ebfn s\u1ebd t\u0103ng g\u1ea5p \u0111\u00f4i (<a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">TDK-Lambda<\/a>). C\u00e1c k\u1ef9 s\u01b0 \u1ee9ng d\u1ee5ng c\u1ee7a DigiKey ph\u00e2n t\u00edch v\u00ed d\u1ee5 n\u00e0y theo h\u01b0\u1edbng ng\u01b0\u1ee3c l\u1ea1i: m\u1ed9t t\u1ee5 \u0111i\u1ec7n c\u00f3 tu\u1ed5i th\u1ecd \u0111\u1ecbnh m\u1ee9c 2.000 gi\u1edd \u1edf 125 \u00b0C s\u1ebd c\u00f3 tu\u1ed5i th\u1ecd l\u00ean \u0111\u1ebfn h\u00e0ng th\u1eadp k\u1ef7 n\u1ebfu nhi\u1ec7t \u0111\u1ed9 c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c duy tr\u00ec \u1edf m\u1ee9c kho\u1ea3ng 55 \u00b0C (<a href=\"https:\/\/forum.digikey.com\/t\/power-supply-thermal-derating-why-a-550-w-supply-may-only-deliver-230-w\/70170\" target=\"_blank\" rel=\"noopener\">Di\u1ec5n \u0111\u00e0n DigiKey<\/a>). N\u1ebfu li\u00ean t\u1ee5c v\u1eadn h\u00e0nh v\u01b0\u1ee3t qu\u00e1 \u0111\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t, b\u1ea1n s\u1ebd kh\u00f4ng \u201cnh\u1eadn \u0111\u01b0\u1ee3c c\u00f4ng su\u1ea5t b\u1ed5 sung mi\u1ec5n ph\u00ed\u201d: b\u1ea1n \u0111ang \u0111\u00e1nh \u0111\u1ed5i m\u1ee9c c\u00f4ng su\u1ea5t \u0111\u00f3 v\u00e0 l\u00e0m gi\u1ea3m bi\u00ean \u0111\u1ed9 nhi\u1ec7t c\u1ee7a l\u1edbp c\u00e1ch ly (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>).<\/p>\n\n<h3>\u0110\u1ecbnh gi\u00e1 \u0111\u01b0\u1eddng cong c\u00f3 \u0111\u1ed9 d\u1ed1c cao<\/h3>\n\n<p>V\u1eady l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 so s\u00e1nh hai thi\u1ebft b\u1ecb \u201c100 W\u201d? \u1ede nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 40 \u00b0C, thi\u1ebft b\u1ecb c\u00f3 \u0111i\u1ec3m u\u1ed1n t\u1ea1i 50 \u00b0C cung c\u1ea5p c\u00f4ng su\u1ea5t t\u1ed1i \u0111a 100 W. Thi\u1ebft b\u1ecb c\u00f3 \u0111i\u1ec3m u\u1ed1n t\u1ea1i 40 \u00b0C \u0111\u00e3 n\u1eb1m tr\u00ean \u0111\u01b0\u1eddng d\u1ed1c, v\u00e0 theo \u0111\u1ed3 th\u1ecb tr\u00ean, tr\u00ean th\u1ef1c t\u1ebf n\u00f3 l\u00e0 s\u1ea3n ph\u1ea9m c\u00f3 c\u00f4ng su\u1ea5t kho\u1ea3ng 75 W (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). \u0110\u00f3 l\u00e0 s\u1ef1 ch\u00eanh l\u1ec7ch kho\u1ea3ng 25 % v\u1ec1 c\u00f4ng su\u1ea5t th\u1ef1c t\u1ebf gi\u1eefa hai s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c b\u00e1n v\u1edbi c\u00f9ng c\u00f4ng su\u1ea5t t\u00ednh b\u1eb1ng watt, v\u00e0 kho\u1ea3ng c\u00e1ch n\u00e0y c\u00e0ng gia t\u0103ng khi v\u1ecf m\u00e1y n\u00f3ng l\u00ean (xem b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y).<\/p>\n\n\n<div class=\"rich-table-wrap\">\n <p class=\"rich-title\">C\u00e1ch \u0111\u1ecdc nh\u00e3n hi\u1ec7u \u201c100 W\u201d: hai \u0111\u1eb7c t\u00ednh \u0111\u01b0\u1eddng cong \u1edf ba m\u1ee9c nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/p>\n <div class=\"table-wrapper\">\n <table>\n <thead>\n <tr><th>T\u00ednh c\u00e1ch u\u1ed1n l\u01b0\u1ee3n<\/th><th>\u0110i\u1ec3m t\u1ea3i \u0111\u1ea7y \u0111\u1ee7<\/th><th>\u1ede nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 40 \u00b0C<\/th><th>\u1ede nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 60 \u00b0C<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>Th\u00f4ng th\u01b0\u1eddng (\u0111\u1ea7y \u0111\u1ebfn 50 \u00b0C, sau \u0111\u00f3 50 % \u1edf 70 \u00b0C)<\/td><td>50 \u00b0C<\/td><td>100 W<\/td><td>~75 W<\/td><\/tr>\n <tr><td>Ch\u1ebf \u0111\u1ed9 m\u1ea1nh (\u0111\u1ebfn 40 \u00b0C, sau \u0111\u00f3 l\u00e0 50 % \u1edf 60 \u00b0C)<\/td><td>40 \u00b0C<\/td><td>~75 W<\/td><td>~50 W<\/td><\/tr>\n <tr><td>Ch\u1ebf \u0111\u1ed9 b\u1ea3o qu\u1ea3n (\u0111\u1ebfn 50 \u00b0C+, c\u00f3 t\u00f9y ch\u1ecdn qu\u1ea1t th\u1ed5i)<\/td><td>50 \u00b0C tr\u1edf l\u00ean<\/td><td>100 W<\/td><td>Ph\u1ee5 thu\u1ed9c v\u00e0o h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t \u2014 c\u00f3 th\u1ec3 ch\u1ecbu t\u1ea3i 100 W khi s\u1eed d\u1ee5ng qu\u1ea1t<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n\n<div class=\"bp-1-hook bd-reveal\">\n <div class=\"bp-1-stat\">25 %<\/div>\n <div class=\"bp-1-ttl\">C\u00f9ng m\u1ed9t b\u1ea3ng t\u00ean. Nh\u01b0ng kh\u00f4ng ph\u1ea3i c\u00f9ng m\u1ed9t m\u00e1y.<\/div>\n <div class=\"bp-1-sub\">Hai b\u1ed9 ngu\u1ed3n \u201c100 W\u201d, m\u1ed9t b\u1ed9 c\u00f3 c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c khi t\u1ea3i \u0111\u1ea7y \u1edf 50 \u00b0C v\u00e0 m\u1ed9t b\u1ed9 \u1edf 40 \u00b0C, c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch kho\u1ea3ng 25 % c\u00f4ng su\u1ea5t s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 40 \u00b0C \u2014 v\u00e0 kho\u1ea3ng c\u00e1ch n\u00e0y s\u1ebd ng\u00e0y c\u00e0ng gia t\u0103ng khi t\u1ee7 thi\u1ebft b\u1ecb n\u00f3ng l\u00ean.<\/div>\n<\/div>\n\n<h2>H\u00e3y so s\u00e1nh c\u00e1c b\u1ed9 ngu\u1ed3n d\u1ef1a tr\u00ean d\u00f2ng \u0111i\u1ec7n s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00f4ng su\u1ea5t ghi tr\u00ean nh\u00e3n<\/h2>\n\n<p>N\u1ebfu b\u1ea1n chuy\u00ean cung c\u1ea5p, nh\u1eadp kho ho\u1eb7c b\u00e1n l\u1ea1i c\u00e1c b\u1ed9 ngu\u1ed3n, nguy\u00ean t\u1eafc th\u1ef1c t\u1ebf r\u1ea5t \u0111\u01a1n gi\u1ea3n: <strong>H\u00e3y so s\u00e1nh d\u1ef1a tr\u00ean d\u00f2ng \u0111i\u1ec7n l\u00e0m vi\u1ec7c t\u1ea1i nhi\u1ec7t \u0111\u1ed9 s\u1eed d\u1ee5ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u1ef1a tr\u00ean c\u00f4ng su\u1ea5t ghi tr\u00ean nh\u00e3n.<\/strong> M\u1ed9t thi\u1ebft b\u1ecb \u201c240 W\u201d c\u00f3 th\u1ec3 duy tr\u00ec t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 \u1edf 50 \u00b0C v\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u201c240 W\u201d b\u1eaft \u0111\u1ea7u suy gi\u1ea3m hi\u1ec7u su\u1ea5t \u1edf 40 \u00b0C l\u00e0 hai s\u1ea3n ph\u1ea9m kh\u00e1c nhau d\u00f9 c\u00f9ng mang nh\u00e3n hi\u1ec7u; v\u00e0 ng\u01b0\u1eddi mua ch\u1ec9 so s\u00e1nh th\u00f4ng tin tr\u00ean trang b\u00eca ch\u00ednh l\u00e0 ng\u01b0\u1eddi s\u1ebd ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi s\u1ef1 c\u1ed1 h\u1ecfng h\u00f3c trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng.<\/p>\n\n<p>Ba b\u01b0\u1edbc ki\u1ec3m tra sau \u0111\u00e2y s\u1ebd bi\u1ebfn quy t\u1eafc \u0111\u00f3 th\u00e0nh th\u00f3i quen:<\/p>\n\n<ol>\n<li><strong>Lu\u00f4n y\u00eau c\u1ea7u b\u1ea3n th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7.<\/strong> \u0110\u01b0\u1eddng cong gi\u1ea3m c\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y \u1edf trang cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ea3ng d\u1eef li\u1ec7u \u0111\u1ea7y \u0111\u1ee7; c\u00e1c tr\u00edch \u0111o\u1ea1n t\u1eeb danh m\u1ee5c v\u00e0 c\u00e1c trang t\u00f3m t\u1eaft th\u01b0\u1eddng b\u1ecf qua ph\u1ea7n n\u00e0y (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). M\u1ed9t nh\u00e0 cung c\u1ea5p kh\u00f4ng th\u1ec3 ho\u1eb7c kh\u00f4ng ch\u1ecbu cung c\u1ea5p b\u1ea3n v\u1ebd \u0111\u01b0\u1eddng cong \u0111ang y\u00eau c\u1ea7u b\u1ea1n mua h\u00e0ng ch\u1ec9 d\u1ef1a tr\u00ean ni\u1ec1m tin. Trong \u1ee9ng d\u1ee5ng t\u1ee7 s\u1ea5y n\u00f3ng, ni\u1ec1m tin \u0111\u00f3 s\u1ebd s\u1ee5p \u0111\u1ed5 v\u00e0o kho\u1ea3ng th\u00e1ng 8.<\/li>\n<li><strong>H\u00e3y \u0111\u1ecdc ba \u0111i\u1ec3m sau \u0111\u00e2y.<\/strong> \u0110i\u1ec3m k\u1ebft th\u00fac giai \u0111o\u1ea1n \u1ed5n \u0111\u1ecbnh, \u0111\u1ed9 d\u1ed1c, gi\u00e1 tr\u1ecb d\u01b0 \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a. Ba con s\u1ed1 n\u00e0y cung c\u1ea5p nhi\u1ec1u th\u00f4ng tin h\u01a1n so v\u1edbi c\u00f4ng su\u1ea5t (watt).<\/li>\n<li><strong>H\u00e3y t\u00ednh to\u00e1n k\u1ef9 tr\u01b0\u1edbc khi b\u00e1o gi\u00e1 ho\u1eb7c \u0111\u1eb7t h\u00e0ng.<\/strong> H\u00e3y l\u1ea5y gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 trong t\u1ee7 v\u00e0 d\u00f2ng \u0111i\u1ec7n t\u1ea3i li\u00ean t\u1ee5c trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t c\u1ee7a kh\u00e1ch h\u00e0ng, so s\u00e1nh v\u1edbi \u0111\u01b0\u1eddng cong c\u1ee7a s\u1ea3n ph\u1ea9m \u1ee9ng vi\u00ean, v\u00e0 x\u00e1c nh\u1eadn r\u1eb1ng gi\u00e1 tr\u1ecb \u0111\u00e3 \u0111i\u1ec1u ch\u1ec9nh gi\u1ea3m v\u1eabn \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c t\u1ea3i. N\u00ean d\u1ef1 tr\u00f9 m\u1ed9t kho\u1ea3ng d\u01b0, v\u00ec b\u1ee5i t\u00edch t\u1ee5 v\u00e0 lu\u1ed3ng kh\u00ed b\u1ecb c\u1ea3n tr\u1edf s\u1ebd \u00e2m th\u1ea7m l\u00e0m suy gi\u1ea3m hi\u1ec7u qu\u1ea3 l\u00e0m m\u00e1t trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a thi\u1ebft b\u1ecb (<a href=\"https:\/\/forum.digikey.com\/t\/power-supply-thermal-derating-why-a-550-w-supply-may-only-deliver-230-w\/70170\" target=\"_blank\" rel=\"noopener\">Di\u1ec5n \u0111\u00e0n DigiKey<\/a>).<\/li>\n<\/ol>\n\n\n<div class=\"rich-card rich-checklist bd-reveal\">\n <p class=\"rich-checklist-title\"><span class=\"rich-title-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m3 17 2 2 4-4\"\/><path d=\"m3 7 2 2 4-4\"\/><path d=\"M13 6h8\"\/><path d=\"M13 12h8\"\/><path d=\"M13 18h8\"\/><\/svg><\/span>Danh s\u00e1ch ki\u1ec3m tra l\u1ef1a ch\u1ecdn<\/p>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">\u0110\u00e3 nh\u1eadn \u0111\u01b0\u1ee3c b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u1ea7y \u0111\u1ee7 (bao g\u1ed3m trang bi\u1ec3u \u0111\u1ed3 gi\u1ea3m c\u00f4ng su\u1ea5t)<\/span><\/div>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">\u0110\u00e3 ghi nh\u1eadn \u0111i\u1ec3m b\u00e3o h\u00f2a khi t\u1ea3i \u0111\u1ea7y<\/span><\/div>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">\u0110\u00e3 ghi nh\u1eadn \u0111\u1ed9 d\u1ed1c v\u00e0 nhi\u1ec7t \u0111\u1ed9 d\u01b0 70 \u00b0C<\/span><\/div>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">\u0110\u00e3 x\u00e1c nh\u1eadn v\u1edbi kh\u00e1ch h\u00e0ng v\u1ec1 nhi\u1ec7t \u0111\u1ed9 t\u1ee7 trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t<\/span><\/div>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">D\u00f2ng t\u1ea3i li\u00ean t\u1ee5c \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi gi\u00e1 tr\u1ecb \u0111\u00e3 \u0111i\u1ec1u ch\u1ec9nh gi\u1ea3m<\/span><\/div>\n <div class=\"rich-check-item\"><span class=\"rich-check-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg><\/span><span class=\"rich-check-txt\">C\u1ea5p c\u00f4ng su\u1ea5t s\u1ebd t\u0103ng th\u00eam m\u1ed9t b\u1eadc n\u1ebfu thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t trong m\u1ed9t khoang k\u00edn ho\u1eb7c h\u01b0\u1edbng v\u1ec1 ph\u00eda m\u1eb7t tr\u1eddi<\/span><\/div>\n<\/div>\n\n<p>Khi n\u00e0o vi\u1ec7c ch\u1ecdn k\u00edch c\u1ee1 l\u1edbn h\u01a1n l\u1ea1i l\u00e0 sai l\u1ea7m? \u0110\u00f3 l\u00e0 khi m\u00f4i tr\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd: m\u1ed9t ph\u00f2ng \u0111i\u1ec7n c\u00f3 \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, n\u01a1i nhi\u1ec7t \u0111\u1ed9 b\u00ean trong t\u1ee7 \u0111i\u1ec7n kh\u00f4ng bao gi\u1edd v\u01b0\u1ee3t qu\u00e1 50 \u00b0C, ho\u1eb7c khi t\u1ea3i ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi th\u00f4ng s\u1ed1 tr\u00ean nh\u00e3n k\u1ef9 thu\u1eadt. M\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c n\u00e0y l\u00e0 ch\u1ecdn \u0111\u01b0\u1ee3c \u0111\u01b0\u1eddng cong c\u00f4ng su\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a b\u1ea1n, ch\u1ee9 kh\u00f4ng ph\u1ea3i ch\u1ecdn thi\u1ebft b\u1ecb c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt l\u1edbn nh\u1ea5t m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 mua \u0111\u01b0\u1ee3c.<\/p>\n\n<h2>\u00dd ngh\u0129a c\u1ee7a vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 ph\u00e2n ph\u1ed1i v\u00e0 \u0111\u1ea1i l\u00fd b\u00e1n l\u1ebb<\/h2>\n\n<p>C\u00e1c nh\u00e0 ph\u00e2n ph\u1ed1i b\u00e1n nh\u1eefng g\u00ec kh\u00e1ch h\u00e0ng c\u1ee7a h\u1ecd c\u1ea7n trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t, ch\u1ee9 kh\u00f4ng ph\u1ea3i nh\u1eefng g\u00ec th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt h\u1ee9a h\u1eb9n trong tr\u01b0\u1eddng h\u1ee3p t\u1ed1t nh\u1ea5t. Vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t l\u00e0 \u0111i\u1ec3m m\u00e0 hai y\u1ebfu t\u1ed1 n\u00e0y ph\u00e2n k\u1ef3, v\u00e0 m\u1ed7i \u0111i\u1ec3m n\u00eau tr\u00ean \u0111\u1ec1u c\u00f3 m\u1ed9t h\u1ec7 qu\u1ea3 t\u01b0\u01a1ng \u1ee9ng trong kinh doanh.<\/p>\n\n<p>Th\u1ee9 nh\u1ea5t, c\u00e1c s\u1ef1 c\u1ed1 c\u1ee7a kh\u00e1ch h\u00e0ng th\u01b0\u1eddng t\u1eadp trung ch\u00ednh x\u00e1c t\u1ea1i \u0111i\u1ec3m u\u1ed1n c\u1ee7a \u0111\u01b0\u1eddng cong. M\u1ed9t x\u01b0\u1edfng s\u1eeda ch\u1eefa ho\u1eb7c nh\u00e0 s\u1ea3n xu\u1ea5t b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n khi l\u1eafp \u0111\u1eb7t ngu\u1ed3n \u0111i\u1ec7n v\u00e0o t\u1ee7 k\u00edn, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo th\u00f4ng s\u1ed1 tr\u00ean trang \u0111\u1ea7u, s\u1ebd g\u1eb7p ph\u1ea3i c\u00e1c tri\u1ec7u ch\u1ee9ng thi\u1ebfu c\u00f4ng su\u1ea5t trong th\u1eddi ti\u1ebft n\u00f3ng: s\u1ee5t \u00e1p, kh\u1edfi \u0111\u1ed9ng l\u1ea1i, h\u1ecfng h\u00f3c s\u1edbm. \u0110\u00f3 l\u00e0 vi\u1ec7c ph\u1ea3i tr\u1ea3 l\u1ea1i s\u1ea3n ph\u1ea9m, g\u1ecdi d\u1ecbch v\u1ee5 v\u00e0 m\u1ea5t c\u01a1 h\u1ed9i b\u00e1n l\u1ea1i, t\u1ea5t c\u1ea3 \u0111\u1ec1u t\u1eadp trung v\u00e0o c\u00e1c \u1ee9ng d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng k\u00edn n\u00f3ng m\u00e0 \u0111\u01b0\u1eddng cong \u0111\u00e3 d\u1ef1 \u0111o\u00e1n. B\u00e1n s\u1ea3n ph\u1ea9m d\u1ef1a tr\u00ean d\u00f2ng \u0111i\u1ec7n gi\u1ea3m c\u00f4ng su\u1ea5t \u1edf 60 \u00b0C kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 c\u1ea9n tr\u1ecdng qu\u00e1 m\u1ee9c; \u0111\u00f3 l\u00e0 c\u00e1ch tr\u00e1nh nh\u1eefng khi\u1ebfu n\u1ea1i c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c.<\/p>\n\n<p>Th\u1ee9 hai, h\u00e3y d\u1ef1 tr\u1eef c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 c\u00f4ng su\u1ea5t d\u1ef1 ph\u00f2ng. M\u1ed9t danh m\u1ee5c s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp ho\u00e0n to\u00e0n theo c\u00f4ng su\u1ea5t (watt) th\u01b0\u1eddng thi\u1ebfu h\u1ee5t c\u00e1c thi\u1ebft b\u1ecb \u201cph\u00f9 h\u1ee3p v\u1edbi t\u1ee7 n\u00f3ng\u201d, b\u1edfi v\u00ec thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng t\u1ea3i 8 A trong t\u1ee7 c\u00f3 nhi\u1ec7t \u0111\u1ed9 60 \u00b0C s\u1ebd \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n 480 W, ch\u1ee9 kh\u00f4ng ph\u1ea3i 240 W. Khi b\u1ea1n d\u1ef1 tr\u1eef c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m c\u00f3 c\u00f4ng su\u1ea5t cao h\u01a1n b\u00ean c\u1ea1nh c\u00e1c d\u00f2ng ti\u00eau chu\u1ea9n, \u0111\u01a1n h\u00e0ng d\u00e0nh cho m\u00f4i tr\u01b0\u1eddng n\u00f3ng s\u1ebd tr\u1edf th\u00e0nh m\u1eb7t h\u00e0ng c\u00f3 s\u1eb5n thay v\u00ec \u0111\u01a1n h\u00e0ng \u0111\u1eb7t ri\u00eang.<\/p>\n\n<p>Th\u1ee9 ba, h\u00e3y \u0111\u01b0a thu\u1eadt ng\u1eef \u201c25 %\u201d v\u00e0o t\u1eeb v\u1ef1ng b\u00e1o gi\u00e1 c\u1ee7a b\u1ea1n. Khi kh\u00e1ch h\u00e0ng so s\u00e1nh b\u00e1o gi\u00e1 c\u1ee7a b\u1ea1n v\u1edbi m\u1ed9t s\u1ea3n ph\u1ea9m c\u00f9ng c\u00f4ng su\u1ea5t nh\u01b0ng r\u1ebb h\u01a1n, s\u1ef1 kh\u00e1c bi\u1ec7t c\u00f3 th\u1ec3 ch\u1ec9 \u0111\u01a1n thu\u1ea7n n\u1eb1m \u1edf \u0111\u01b0\u1eddng cong hi\u1ec7u su\u1ea5t cao: m\u1ed9t m\u00e1y th\u1ef1c t\u1ebf c\u00f3 c\u00f4ng su\u1ea5t 75 W nh\u01b0ng l\u1ea1i \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n 100 W (<a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">XP Power<\/a>). Vi\u1ec7c gi\u1ea3i th\u00edch v\u1ec1 d\u00f2ng \u0111i\u1ec7n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1ee7 \u0111i\u1ec7n ch\u00ednh l\u00e0 c\u00e1ch b\u1ea1n b\u1ea3o v\u1ec7 m\u1ee9c gi\u00e1 d\u1ef1a tr\u00ean c\u01a1 s\u1edf k\u1ef9 thu\u1eadt, thay v\u00ec so s\u00e1nh gi\u00e1 d\u1ef1a tr\u00ean nh\u1eefng l\u1eadp lu\u1eadn kh\u00f4ng c\u00f3 c\u01a1 s\u1edf.<\/p>\n\n<p>Cu\u1ed1i c\u00f9ng, h\u00e3y coi trang bi\u1ec3u \u0111\u1ed3 l\u00e0 m\u1ed9t b\u1ed9 l\u1ecdc nh\u00e0 cung c\u1ea5p. N\u1ebfu b\u1ea1n kh\u00f4ng th\u1ec3 l\u1ea5y \u0111\u01b0\u1ee3c b\u1ea3ng d\u1eef li\u1ec7u \u0111\u1ea7y \u0111\u1ee7, bao g\u1ed3m c\u1ea3 bi\u1ec3u \u0111\u1ed3, t\u1eeb m\u1ed9t ngu\u1ed3n cung c\u1ea5p, b\u1ea1n \u0111ang ti\u1ebfp nh\u1eadn r\u1ee7i ro li\u00ean quan \u0111\u1ebfn th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt kh\u00f4ng ch\u00ednh x\u00e1c t\u1eeb ngu\u1ed3n \u0111\u00f3 v\u00e0 chuy\u1ec3n giao r\u1ee7i ro \u0111\u00f3 cho kh\u00e1ch h\u00e0ng c\u1ee7a m\u00ecnh. T\u00e0i li\u1ec7u \u0111\u1ea7y \u0111\u1ee7 kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t \u0111i\u1ec1u ti\u1ec7n l\u1ee3i; trong danh m\u1ee5c s\u1ea3n ph\u1ea9m n\u00e0y, n\u00f3 <em>l\u00e0<\/em> th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt.<\/p>\n\n<p class=\"bd-closer\"><em>N\u1ebfu qu\u00fd kh\u00e1ch \u0111ang l\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc cho c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch g\u1eafn tr\u00ean thanh DIN ho\u1eb7c lo\u1ea1i k\u00edn d\u00f9ng cho c\u00e1c t\u1ee7 \u0111i\u1ec7n \u0111ang ho\u1ea1t \u0111\u1ed9ng, s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i <a href=\"https:\/\/www.omch.com\/vi\/switch-mode-power-supply\/\" target=\"_self\">D\u1ea3i ngu\u1ed3n \u0111i\u1ec7n chuy\u1ec3n m\u1ea1ch<\/a> bao g\u1ed3m c\u00e1c thi\u1ebft b\u1ecb nh\u1ecf g\u1ecdn \u0111\u1ebfn c\u00e1c m\u1eabu l\u1eafp tr\u00ean thanh DIN c\u00f4ng su\u1ea5t 480 W, c\u00f3 d\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o r\u1ed9ng 85\u2013264 VAC v\u00e0 t\u1ee5 \u0111i\u1ec7n \u0111\u1ea7u ra ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 \u0111\u1ecbnh m\u1ee9c 105 \u00b0C. S\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i <a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\" target=\"_self\">d\u1ecbch v\u1ee5 t\u01b0 v\u1ea5n l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m<\/a> s\u1ebd \u0111i\u1ec1u ch\u1ec9nh thi\u1ebft b\u1ecb sao cho ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec7t \u0111\u1ed9 th\u1ef1c t\u1ebf b\u00ean trong t\u1ee7 c\u1ee7a b\u1ea1n, ch\u1ee9 kh\u00f4ng ch\u1ec9 d\u1ef1a tr\u00ean c\u00f4ng su\u1ea5t (watt). <a href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">Li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i<\/a> H\u00e3y xem x\u00e9t c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng v\u00e0 bi\u1ec3u \u0111\u1ed3 t\u1ea3i tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng.<\/em><\/p>\n\n\n<div class=\"bp-cta-end bd-reveal\">\n <p class=\"bp-cta-end-ttl\"><span class=\"bd-cta-ic\"><svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m22 2-7 20-4-9-9-4z\"\/><path d=\"M22 2 11 13\"\/><\/svg><\/span>H\u00e3y ch\u1ecdn c\u1ee1 d\u1ef1a v\u00e0o \u0111\u01b0\u1eddng cong, ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u1ef1a v\u00e0o nh\u00e3n m\u00e1c.<\/p>\n <p class=\"bp-cta-end-sub\">Vui l\u00f2ng cung c\u1ea5p nhi\u1ec7t \u0111\u1ed9 c\u1ef1c \u0111\u1ea1i trong t\u1ee7 c\u1ee7a qu\u00fd kh\u00e1ch v\u00e0 t\u1ea3i li\u00ean t\u1ee5c. Ch\u00fang t\u00f4i s\u1ebd l\u1ef1a ch\u1ecdn \u0111\u00fang c\u1ea5p c\u00f4ng su\u1ea5t, m\u1eabu s\u1ea3n ph\u1ea9m v\u00e0 \u0111\u01b0\u1eddng cong tr\u01b0\u1edbc khi ti\u1ebfn h\u00e0nh giao h\u00e0ng.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">G\u1eedi h\u1ed3 s\u01a1 t\u1ea3i c\u1ee7a t\u00f4i<svg viewbox=\"0 0 24 24\" fill=\"none\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M5 12h14\"\/><path d=\"m12 5 7 7-7 7\"\/><\/svg><\/a>\n<\/div>\n\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<ol>\n<li>[XP Power]. \u201cHi\u1ec3u v\u1ec1 c\u00e1c th\u00f4ng s\u1ed1 gi\u1ea3m c\u00f4ng su\u1ea5t c\u1ee7a b\u1ed9 ngu\u1ed3n.\u201d 2024. <a href=\"https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications\" target=\"_blank\" rel=\"noopener\">https:\/\/www.xppower.com\/resources\/blog\/understanding-power-supply-de-rating-specifications<\/a><\/li>\n<li>[TDK-Lambda]. \u201cL\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m gi\u1ea3m c\u00f4ng su\u1ea5t c\u1ee7a b\u1ed9 ngu\u1ed3n?\u201d 2022. <a href=\"https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html\" target=\"_blank\" rel=\"noopener\">https:\/\/www.us.lambda.tdk.com\/resources\/blogs\/20220527.html<\/a><\/li>\n<li>[PULS]. \u201cGi\u1ea3m c\u00f4ng su\u1ea5t c\u00f3 ngh\u0129a l\u00e0 g\u00ec trong b\u1ed1i c\u1ea3nh b\u1ed9 ngu\u1ed3n?\u201d (C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p). <a href=\"https:\/\/products.pulspower.com\/en\/faq\/meaning-derating\" target=\"_blank\" rel=\"noopener\">https:\/\/products.pulspower.com\/en\/faq\/meaning-derating<\/a><\/li>\n<li>[Di\u1ec5n \u0111\u00e0n DigiKey]. \u201cGi\u1ea3m c\u00f4ng su\u1ea5t do nhi\u1ec7t c\u1ee7a b\u1ed9 ngu\u1ed3n: T\u1ea1i sao b\u1ed9 ngu\u1ed3n 550 W c\u00f3 th\u1ec3 ch\u1ec9 cung c\u1ea5p \u0111\u01b0\u1ee3c 230 W.\u201d 2023. <a href=\"https:\/\/forum.digikey.com\/t\/power-supply-thermal-derating-why-a-550-w-supply-may-only-deliver-230-w\/70170\" target=\"_blank\" rel=\"noopener\">https:\/\/forum.digikey.com\/t\/power-supply-thermal-derating-why-a-550-w-supply-may-only-deliver-230-w\/70170<\/a><\/li>\n<li>[r\/PLC \u2014 Reddit]. \u201cKh\u00f4ng l\u1eafp c\u00e1c linh ki\u1ec7n t\u1ecfa nhi\u1ec7t l\u00ean thanh DIN d\u1ecdc.\u201d 2024. <a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/1cj8w5b\/dont_mount_heat_producing_components_on_vertical\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.reddit.com\/r\/PLC\/comments\/1cj8w5b\/dont_mount_heat_producing_components_on_vertical\/<\/a><\/li>\n<li>[r\/PLC \u2014 Reddit]. \u201cC\u00f3 ai kh\u00e1c l\u00e0m nh\u01b0 v\u1eady kh\u00f4ng?\u201d 2025. <a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/1lhyju8\/anyone_else_do_this\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.reddit.com\/r\/PLC\/comments\/1lhyju8\/anyone_else_do_this\/<\/a><\/li>\n<li>[OMCH]. \u201cB\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch.\u201d <a href=\"https:\/\/www.omch.com\/vi\/switch-mode-power-supply\/\" target=\"_self\">https:\/\/www.omch.com\/switch-mode-power-supply\/<\/a><\/li>\n<li>[OMCH]. \u201cL\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m.\u201d <a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\" target=\"_self\">https:\/\/www.omch.com\/product-selection\/<\/a><\/li>\n<li>[OMCH]. \u201cLi\u00ean h\u1ec7 v\u1edbi OMCH.\u201d <a href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">https:\/\/www.omch.com\/contact\/<\/a><\/li>\n<li>[OMCH]. \u201cNh\u00e0 s\u1ea3n xu\u1ea5t linh ki\u1ec7n t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p \u2014 OMCH.\u201d <a href=\"https:\/\/www.omch.com\/vi\/\" target=\"_self\">https:\/\/www.omch.com\/<\/a><\/li>\n<\/ol>\n\n<\/article>\n<\/div>\n\n<\/body>\n<\/html>","protected":false},"excerpt":{"rendered":"<p>Gi\u1ea3i th\u00edch v\u1ec1 vi\u1ec7c gi\u1ea3m c\u00f4ng su\u1ea5t ngu\u1ed3n \u0111i\u1ec7n: Nh\u1eefng \u0111i\u1ec1u nh\u00e3n m\u00e1c kh\u00f4ng \u0111\u1ec1 c\u1eadp M\u1edf b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch, b\u1ea1n s\u1ebd th\u1ea5y hai con s\u1ed1 d\u01b0\u1eddng nh\u01b0 m\u00e2u thu\u1eabn nhau. Con s\u1ed1 \u0111\u1ea7u ti\u00ean, \u1edf trang \u0111\u1ea7u, ghi l\u00e0 240 W. Con s\u1ed1 th\u1ee9 hai, n\u1eb1m \u1ea9n \u1edf g\u1ea7n cu\u1ed1i, l\u00e0 m\u1ed9t bi\u1ec3u \u0111\u1ed3 cho th\u1ea5y r\u1eb1ng \u1edf 70 \u00b0C, c\u00f9ng m\u1ed9t thi\u1ebft b\u1ecb [\u2026]<\/p>","protected":false},"author":4,"featured_media":12291,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Power Supply Derating: Temperature, Load & Sizing Guide","_seopress_titles_desc":"Learn how temperature, airflow, altitude and load affect power supply output, and use derating curves to size a reliable supply.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-12288","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mmlblog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12288","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/comments?post=12288"}],"version-history":[{"count":1,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12288\/revisions"}],"predecessor-version":[{"id":12292,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12288\/revisions\/12292"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/12291"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=12288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=12288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=12288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}