Ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh so v\u1edbi ngu\u1ed3n \u0111i\u1ec7n chuy\u1ec3n m\u1ea1ch: H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn th\u1ef1c ti\u1ec5n d\u00e0nh cho c\u00e1c k\u1ef9 s\u01b0<\/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\n \/* Palette \u2014 plan gate approved *\/\n --body-bg: #FFFFFF;\n --body-text: #333333;\n --body-text-secondary: #6E6E6E;\n --heading-ink: #000000;\n --accent: #3B89D3;\n --accent-text: #1A6BB5;\n --accent-hot: #FD9649;\n --inverse-bg: #1E1E1E;\n --inverse-text: #FFFFFF;\n --inverse-text-secondary: #B0B0B0;\n --card-fill: #F0F7FC;\n --card-border: #E0E0E0;\n --card-text: #333333;\n --card-text-secondary: #6E6E6E;\n --table-stripe: #BBCFE0;\n --border-light: #E0E0E0;\n --btn-white: #FFFFFF;\n --btn-ink: #0D3972;\n\n font-family: \"Manrope\", sans-serif;\n font-size: 16px;\n font-weight: 400;\n line-height: 1.6;\n color: var(--body-text);\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 a, .bd-post li a, .bd-post blockquote a, .bd-post td a {\n color: var(--accent-text); text-decoration: underline;\n }\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\n .bd-post h1 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 34px; line-height: 1.2; color: var(--heading-ink); margin: 0 0 16px; }\n .bd-post h2 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 34px; line-height: 1.2; color: var(--heading-ink); margin: 48px 0 16px; }\n .bd-post h3 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 24px; line-height: 1.25; color: var(--heading-ink); margin: 32px 0 12px; }\n .bd-post h4 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 18px; line-height: 1.2; color: var(--heading-ink); margin: 24px 0 8px; }\n .bd-post p { margin: 0 0 1em; }\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 blockquote { border-left: 3px solid var(--accent); background: var(--body-bg); padding: 16px 24px; margin: 24px 0; color: var(--body-text); font-style: italic; }\n .bd-post img { max-width: 100%; height: auto; }\n .bd-post .table-wrapper { overflow-x: auto; }\n .bd-post table { width: 100%; border-collapse: collapse; font-size: 15px; border-radius: 6px; overflow: hidden; }\n .bd-post th { background: var(--accent); color: var(--btn-white); font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 14px; text-transform: uppercase; letter-spacing: 0.5px; padding: 12px 16px; text-align: left; }\n .bd-post td { padding: 12px 16px; border-bottom: 1px solid var(--border-light); }\n .bd-post tr:nth-child(even) td { background: var(--table-stripe); }\n\n .bd-post [class*=\"bp-\"] { box-sizing: border-box; }\n .bd-post .bd-post-article > .bp-stat-dual,\n .bd-post .bd-post-article > .bp-card-hybrid,\n .bd-post .bd-post-article > .bp-checklist { margin: var(--gap-normal) 0; }\n .bd-post .bd-post-article > .bp-cta-end { margin: var(--gap-section) 0 0; }\n\n \/* BP-1: Stat Dual \u2014 accent solid-fill *\/\n .bd-post .bp-stat-dual { background: var(--accent); border-radius: 8px; padding: var(--pad-standard); display: flex; flex-direction: row; align-items: center; justify-content: space-around; color: var(--btn-white); }\n .bd-post .bp-stat-dual .bp-stat-item { text-align: center; flex: 1; }\n .bd-post .bp-stat-dual .bp-stat-number { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 40px; line-height: 1.1; color: var(--btn-white); }\n .bd-post .bp-stat-dual .bp-stat-label { font-family: \"Manrope\", sans-serif; font-weight: 600; font-size: 14px; opacity: 0.85; margin-top: 4px; }\n .bd-post .bp-stat-dual .bp-stat-divider { width: 1px; align-self: stretch; background: var(--btn-white); opacity: 0.25; flex: 0 0 1px; }\n\n \/* BP-2: Hybrid Card \u2014 card-fill *\/\n .bd-post .bp-card-hybrid { background: var(--card-fill); border: 1px solid var(--card-border); border-radius: 8px; padding: var(--pad-standard); display: flex; gap: 16px; }\n .bd-post .bp-card-hybrid .bp-hybrid-icon { flex: 0 0 auto; display: flex; align-items: flex-start; padding-top: 2px; }\n .bd-post .bp-card-hybrid .bp-hybrid-icon svg { color: var(--accent); }\n .bd-post .bp-card-hybrid .bp-hybrid-body { flex: 1; }\n .bd-post .bp-card-hybrid .bp-hybrid-body h4 { margin-top: 0; }\n .bd-post .bp-card-hybrid .bp-hybrid-body p { color: var(--card-text); margin-bottom: 16px; }\n .bd-post .bp-card-hybrid .bp-hybrid-badges { display: flex; flex-wrap: wrap; gap: 8px; }\n .bd-post .bp-card-hybrid .bp-badge { font-family: \"Manrope\", sans-serif; font-weight: 600; font-size: 12px; color: var(--accent-text); background: var(--body-bg); border: 1px solid var(--accent); border-radius: 4px; padding: 4px 10px; }\n\n \/* BP-3: Checklist \u2014 card-fill *\/\n .bd-post .bp-checklist { background: var(--card-fill); border: 1px solid var(--card-border); border-radius: 8px; padding: var(--pad-standard); }\n .bd-post .bp-checklist .bp-checklist-title { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 16px; color: var(--heading-ink); margin: 0 0 16px; }\n .bd-post .bp-checklist .bp-check-rows { display: flex; flex-direction: column; gap: 12px; }\n .bd-post .bp-checklist .bp-check-row { display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; border-radius: 4px; }\n .bd-post .bp-checklist .bp-check-row svg { flex: 0 0 auto; margin-top: 1px; color: var(--accent); transition: color 0.2s ease-out; }\n .bd-post .bp-checklist .bp-check-row:hover svg { color: var(--accent-hot); }\n .bd-post .bp-checklist .bp-check-row span { font-size: 15px; color: var(--card-text); }\n\n \/* CTA End \u2014 inverse solid-fill *\/\n .bd-post .bp-cta-end { background: var(--inverse-bg); border-radius: 8px; padding: var(--pad-standard); display: flex; flex-direction: column; align-items: center; text-align: center; gap: 12px; }\n .bd-post .bp-cta-end svg { color: var(--accent); }\n .bd-post .bp-cta-end h4 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 24px; line-height: 1.25; color: var(--inverse-text); margin: 0; }\n .bd-post .bp-cta-end p { color: var(--inverse-text-secondary); margin: 0; }\n .bd-post .bp-cta-end-btn { font-family: \"Manrope\", sans-serif; font-weight: 600; font-size: 15px; padding: 12px 28px; border-radius: 6px; border: none; cursor: pointer; background: var(--accent-hot); color: var(--btn-ink); text-decoration: none; display: inline-block; transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, background 0.2s ease-out, color 0.2s ease-out; }\n .bd-post .bp-cta-end-btn:hover { background: var(--btn-white); color: var(--accent-text); }\n\n \/* 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 0.2s ease-out, transform 0.2s ease-out; }\n .bd-post h2:hover { color: var(--accent-text); transform: scale(1.01); }\n .bd-post .bp-stat-dual { transition: transform 0.2s ease-out, box-shadow 0.2s ease-out; }\n .bd-post .bp-stat-dual:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.10); }\n .bd-post .bp-card-hybrid { transition: transform 0.2s ease-out, box-shadow 0.2s ease-out; }\n .bd-post .bp-card-hybrid:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-checklist { transition: transform 0.2s ease-out, box-shadow 0.2s ease-out; }\n .bd-post .bp-checklist:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-cta-end-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 14px rgba(0,0,0,0.25); }\n .bd-post .bd-post-article a { transition: color 0.2s ease-out, text-decoration-color 0.2s ease-out; }\n }\n\n \/* Mobile *\/\n @media (max-width: 768px) {\n .bd-post { padding: 16px; }\n .bd-post h1 { font-size: 26px; }\n .bd-post h2 { font-size: 26px; margin-top: 32px; }\n .bd-post h3 { font-size: 20px; margin-top: 24px; }\n .bd-post .bp-stat-dual { flex-direction: column; gap: 16px; }\n .bd-post .bp-stat-dual .bp-stat-divider { width: 60px; height: 1px; align-self: center; }\n .bd-post .bp-stat-dual .bp-stat-number { font-size: 30px; }\n .bd-post .bp-card-hybrid { flex-direction: column; }\n .bd-post .bp-card-hybrid .bp-hybrid-icon { padding-top: 0; }\n .bd-post .bp-cta-end h4 { font-size: 20px; }\n }\n <\/style>\n <article class=\"bd-post-article\">\n <h1><\/h1>\n\n <p>Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) l\u00e0 m\u1ed9t trong nh\u1eefng quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u ti\u00ean m\u00e0 b\u1ea1n s\u1ebd ph\u1ea3i \u0111\u1ed1i m\u1eb7t khi thi\u1ebft k\u1ebf ho\u1eb7c n\u00e2ng c\u1ea5p thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p. C\u1ea3 hai lo\u1ea1i \u0111\u1ec1u chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u00e0nh \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u \u1ed5n \u0111\u1ecbnh \u2014 nh\u01b0ng c\u00e1ch th\u1ee9c qu\u1ea3n l\u00fd n\u0103ng l\u01b0\u1ee3ng c\u1ee7a ch\u00fang l\u1ea1i ho\u00e0n to\u00e0n kh\u00e1c bi\u1ec7t. V\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ecdi kh\u00eda c\u1ea1nh quan tr\u1ecdng: hi\u1ec7u su\u1ea5t, \u0111\u1ed9 \u1ed3n, k\u00edch th\u01b0\u1edbc, chi ph\u00ed v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 kh\u1ea3 n\u0103ng h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady trong th\u1ef1c t\u1ebf.<\/p>\n\n <p>H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd ph\u00e2n t\u00edch chi ti\u1ebft nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i, so s\u00e1nh tr\u1ef1c ti\u1ebfp hi\u1ec7u su\u1ea5t, ch\u1ec9 ra \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a t\u1eebng lo\u1ea1i v\u00e0 k\u1ebft th\u00fac b\u1eb1ng m\u1ed9t khung quy\u1ebft \u0111\u1ecbnh th\u1ef1c ti\u1ec5n. D\u00f9 b\u1ea1n \u0111ang l\u1eadp th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cho m\u1ed9t b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n, thay th\u1ebf ngu\u1ed3n \u0111i\u1ec7n c\u0169 hay \u0111\u00e1nh gi\u00e1 c\u00e1c nh\u00e0 cung c\u1ea5p, b\u1ea1n s\u1ebd t\u00ecm th\u1ea5y nh\u1eefng d\u1eef li\u1ec7u v\u00e0 logic ra quy\u1ebft \u0111\u1ecbnh c\u1ea7n thi\u1ebft.<\/p>\n\n <h2>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch<\/h2>\n<img decoding=\"async\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_cfl83lcfl83lcfl8.webp\" alt=\"M\u00f4 t\u1ea3\" class=\"bd-post-image\" loading=\"lazy\">\n\n <p>C\u1ea3 hai lo\u1ea1i ngu\u1ed3n \u0111i\u1ec7n n\u00e0y \u0111\u1ec1u c\u00f3 c\u00f9ng m\u1ee5c \u0111\u00edch c\u01a1 b\u1ea3n: nh\u1eadn \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o v\u00e0 cung c\u1ea5p \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u (DC) \u0111\u1ea7u ra \u1ed5n \u0111\u1ecbnh, kh\u00f4ng nhi\u1ec5u. \u0110i\u1ec3m kh\u00e1c bi\u1ec7t l\u00e0 <em>nh\u01b0 th\u1ebf n\u00e0o<\/em> H\u1ecd x\u1eed l\u00fd l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng d\u01b0 th\u1eeba \u0111\u00f3.<\/p>\n\n <p>A <strong>ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh<\/strong> s\u1eed d\u1ee5ng m\u1ed9t b\u00f3ng b\u00e1n d\u1eabn n\u1ed1i ti\u1ebfp ho\u1ea1t \u0111\u1ed9ng trong v\u00f9ng tuy\u1ebfn t\u00ednh (ho\u1ea1t \u0111\u1ed9ng). H\u00e3y h\u00ecnh dung n\u00f3 nh\u01b0 m\u1ed9t \u0111i\u1ec7n tr\u1edf bi\u1ebfn thi\u00ean: b\u00f3ng b\u00e1n d\u1eabn li\u00ean t\u1ee5c \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n tr\u1edf c\u1ee7a m\u00ecnh \u0111\u1ec3 duy tr\u00ec \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra \u1ed5n \u0111\u1ecbnh, v\u00e0 b\u1ea5t k\u1ef3 \u0111i\u1ec7n \u00e1p d\u01b0 th\u1eeba n\u00e0o c\u0169ng s\u1ebd b\u1ecb s\u1ee5t gi\u1ea3m qua n\u00f3 \u2014 \u0111\u01b0\u1ee3c t\u1ecfa ra d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t. M\u1ea1ch \u0111i\u1ec7n n\u00e0y r\u1ea5t \u0111\u01a1n gi\u1ea3n: m\u1ed9t bi\u1ebfn \u00e1p t\u1ea7n s\u1ed1 \u0111\u01b0\u1eddng d\u00e2y h\u1ea1 \u00e1p \u0111i\u1ec7n xoay chi\u1ec1u t\u1eeb ngu\u1ed3n \u0111i\u1ec7n l\u01b0\u1edbi, m\u1ed9t b\u1ed9 ch\u1ec9nh l\u01b0u v\u00e0 t\u1ee5 l\u1ecdc t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u ch\u01b0a \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh, v\u00e0 b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh tuy\u1ebfn t\u00ednh s\u1ebd l\u00e0m s\u1ea1ch d\u00f2ng \u0111i\u1ec7n n\u00e0y. Tuy nhi\u00ean, c\u00e1c \u0111\u1ecbnh lu\u1eadt v\u1eadt l\u00fd \u0111\u1eb7t ra m\u1ed9t gi\u1edbi h\u1ea1n c\u1ee9ng: hi\u1ec7u su\u1ea5t kh\u00f4ng bao gi\u1edd c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 Vout\/Vin \u00d7 100%. N\u1ebfu b\u1ea1n h\u1ea1 \u00e1p t\u1eeb 12 V xu\u1ed1ng 5 V, hi\u1ec7u su\u1ea5t t\u1ed1i \u0111a theo l\u00fd thuy\u1ebft ch\u1ec9 l\u00e0 42%. 58% c\u00f2n l\u1ea1i s\u1ebd bi\u1ebfn th\u00e0nh nhi\u1ec7t.<\/p>\n\n <p>A <strong>b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/strong> \u00e1p d\u1ee5ng m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ho\u00e0n to\u00e0n kh\u00e1c bi\u1ec7t. Thay v\u00ec l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng d\u01b0 th\u1eeba, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1eed d\u1ee5ng b\u00f3ng b\u00e1n d\u1eabn l\u00e0m c\u00f4ng t\u1eafc t\u1ed1c \u0111\u1ed9 cao \u2014 \u1edf tr\u1ea1ng th\u00e1i B\u1eacT ho\u00e0n to\u00e0n ho\u1eb7c T\u1eaeT ho\u00e0n to\u00e0n, th\u01b0\u1eddng \u1edf t\u1ea7n s\u1ed1 t\u1eeb 50 kHz \u0111\u1ebfn 150 kHz trong c\u00e1c thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p. B\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung (PWM) \u0111i\u1ec1u ch\u1ec9nh chu k\u1ef3 l\u00e0m vi\u1ec7c: trong giai \u0111o\u1ea1n B\u1eacT, n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u00edch tr\u1eef trong cu\u1ed9n c\u1ea3m ho\u1eb7c m\u00e1y bi\u1ebfn \u00e1p; trong giai \u0111o\u1ea1n T\u1eaeT, n\u0103ng l\u01b0\u1ee3ng \u0111\u00e3 t\u00edch tr\u1eef \u0111\u00f3 \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng ra \u0111\u1ea7u ra. V\u00ec c\u00f4ng t\u1eafc ho\u1eb7c l\u00e0 d\u1eabn \u0111i\u1ec7n ho\u00e0n to\u00e0n (s\u1ee5t \u00e1p g\u1ea7n b\u1eb1ng kh\u00f4ng) ho\u1eb7c l\u00e0 ch\u1eb7n ho\u00e0n to\u00e0n (d\u00f2ng \u0111i\u1ec7n g\u1ea7n b\u1eb1ng kh\u00f4ng), n\u00ean s\u1ef1 ti\u00eau hao c\u00f4ng su\u1ea5t gi\u1ea3m \u0111\u00e1ng k\u1ec3. Hi\u1ec7u su\u1ea5t 85\u201395% l\u00e0 m\u1ee9c th\u00f4ng th\u01b0\u1eddng. C\u00e1c thi\u1ebft k\u1ebf ch\u1ec9nh l\u01b0u \u0111\u1ed3ng b\u1ed9 hi\u1ec7n \u0111\u1ea1i c\u00f2n v\u01b0\u1ee3t xa m\u1ee9c 95%.<\/p>\n\n <p>S\u1ef1 \u0111\u00e1nh \u0111\u1ed5i n\u00e0y \u0111\u00e3 r\u00f5 r\u00e0ng: s\u1ef1 \u0111\u01a1n gi\u1ea3n v\u00e0 y\u00ean t\u0129nh so v\u1edbi hi\u1ec7u qu\u1ea3 v\u00e0 s\u1ef1 ph\u1ee9c t\u1ea1p. Ph\u1ea7n ti\u1ebfp theo s\u1ebd \u0111\u01b0a ra nh\u1eefng con s\u1ed1 c\u1ee5 th\u1ec3 \u0111\u1ec3 minh ch\u1ee9ng cho nh\u1eadn \u0111\u1ecbnh \u0111\u00f3.<\/p>\n\n <h2>So s\u00e1nh tr\u1ef1c ti\u1ebfp: Hi\u1ec7u su\u1ea5t, \u0111\u1ed9 \u1ed3n, k\u00edch th\u01b0\u1edbc v\u00e0 chi ph\u00ed<\/h2>\n\n <p>Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 m\u1ed9t s\u1ef1 c\u00e2n nh\u1eafc gi\u1eefa b\u1ed1n y\u1ebfu t\u1ed1. Kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac n\u00e0o \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u1ea3 b\u1ed1n y\u1ebfu t\u1ed1 n\u00e0y \u2014 c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang ph\u1ee5 thu\u1ed9c v\u00e0o y\u1ebfu t\u1ed1 n\u00e0o l\u00e0 quan tr\u1ecdng nh\u1ea5t \u0111\u1ed1i v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n.<\/p>\n\n <div class=\"table-wrapper\">\n <table>\n <thead><tr><th>K\u00edch th\u01b0\u1edbc<\/th><th>B\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh<\/th><th>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/th><th>\u0110i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Hi\u1ec7u qu\u1ea3<\/td><td>T\u1eeb ba m\u01b0\u01a1i ngh\u00ecn \u0111\u1ebfn s\u00e1u m\u01b0\u01a1i m\u1ed1t ngh\u00ecn, ba tr\u0103m ba m\u01b0\u01a1i ba<\/td><td>T\u1eeb b\u1ea3y m\u01b0\u01a1i ngh\u00ecn \u0111\u1ebfn ch\u00edn m\u01b0\u01a1i l\u0103m ngh\u00ecn ba pence<\/td><td>SMPS chi\u1ebfm \u01b0u th\u1ebf \u1edf m\u1ee9c c\u00f4ng su\u1ea5t tr\u00ean 10W<\/td><\/tr>\n <tr><td>Ti\u1ebfng \u1ed3n \u0111\u1ea7u ra\/Dao \u0111\u1ed9ng<\/td><td><1 mV RMS (gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh)<\/td><td>10\u201350 mV RMS (gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh)<\/td><td>Linear ho\u1ea1t \u0111\u1ed9ng \u00eam h\u01a1n t\u1eeb 10 \u0111\u1ebfn 50 l\u1ea7n<\/td><\/tr>\n <tr><td>K\u00edch th\u01b0\u1edbc v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng<\/td><td>Lo\u1ea1i l\u1edbn (bi\u1ebfn \u00e1p 50\/60 Hz)<\/td><td>kho\u1ea3ng 1\/4 k\u00edch th\u01b0\u1edbc<\/td><td>SMPS v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 m\u1eadt \u0111\u1ed9 c\u00f4ng su\u1ea5t<\/td><\/tr>\n <tr><td>Ph\u1ea3n \u1ee9ng tho\u00e1ng qua<\/td><td>C\u1ed1 \u0111\u1ecbnh (50\u2013100 \u00b5s)<\/td><td>Ch\u1eadm h\u01a1n (~300 \u00b5s)<\/td><td>H\u1ec7 th\u1ed1ng tuy\u1ebfn t\u00ednh ph\u1ea3n \u1ee9ng nhanh h\u01a1n v\u1edbi c\u00e1c b\u01b0\u1edbc t\u1ea3i<\/td><\/tr>\n <tr><td>T\u1ea3n nhi\u1ec7t<\/td><td>Cao \u2014 c\u1ea7n c\u00f3 b\u1ed9 t\u1ea3n nhi\u1ec7t<\/td><td>Th\u1ea5p \u2014 ch\u1ec9 c\u1ea7n l\u00e0m m\u00e1t t\u1ed1i thi\u1ec3u<\/td><td>SMPS ho\u1ea1t \u0111\u1ed9ng m\u00e1t h\u01a1n<\/td><\/tr>\n <tr><td>Chi ph\u00ed khi c\u00f4ng su\u1ea5t d\u01b0\u1edbi 50 W<\/td><td>Gi\u1ea3m chi ph\u00ed danh m\u1ee5c v\u1eadt li\u1ec7u (BOM)<\/td><td>S\u1ed1 l\u01b0\u1ee3ng linh ki\u1ec7n nhi\u1ec1u h\u01a1n<\/td><td>\u0110\u1ed9 tuy\u1ebfn t\u00ednh th\u1ea5p h\u01a1n \u1edf m\u1ee9c c\u00f4ng su\u1ea5t th\u1ea5p<\/td><\/tr>\n <tr><td>Chi ph\u00ed khi c\u00f4ng su\u1ea5t >100 W<\/td><td>Cao h\u01a1n (bi\u1ebfn \u00e1p + b\u1ed9 t\u1ea3n nhi\u1ec7t)<\/td><td>Gi\u1ea3m chi ph\u00ed khi m\u1edf r\u1ed9ng quy m\u00f4<\/td><td>SMPS c\u00f3 gi\u00e1 r\u1ebb h\u01a1n khi c\u00f4ng su\u1ea5t cao h\u01a1n<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <h3>Hi\u1ec7u qu\u1ea3 v\u00e0 Nhi\u1ec7t: T\u1ea1i sao vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i l\u1ea1i l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 chi\u1ebfn th\u1eafng trong cu\u1ed9c \u0111ua n\u0103ng l\u01b0\u1ee3ng<\/h3>\n\n <p>Kho\u1ea3ng c\u00e1ch v\u1ec1 hi\u1ec7u su\u1ea5t ch\u00ednh l\u00e0 y\u1ebfu t\u1ed1 ph\u00e2n bi\u1ec7t quan tr\u1ecdng nh\u1ea5t. Hi\u1ec7u su\u1ea5t c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ef7 l\u1ec7 gi\u1eefa \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o v\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra: ch\u00eanh l\u1ec7ch \u0111i\u1ec7n \u00e1p c\u00e0ng l\u1edbn, l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng b\u1ecb l\u00e3ng ph\u00ed d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t c\u00e0ng nhi\u1ec1u.<\/p>\n\n \n <div class=\"bp-stat-dual bd-reveal\">\n <div class=\"bp-stat-item\">\n <div class=\"bp-stat-number\">38W<\/div>\n <div class=\"bp-stat-label\">B\u1ecb th\u1ea5t tho\u00e1t d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t (tuy\u1ebfn t\u00ednh)<\/div>\n <\/div>\n <div class=\"bp-stat-divider\"><\/div>\n <div class=\"bp-stat-item\">\n <div class=\"bp-stat-number\">1,5 W<\/div>\n <div class=\"bp-stat-label\">B\u1ecb th\u1ea5t tho\u00e1t d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t (SMPS)<\/div>\n <\/div>\n <\/div>\n\n <p>\u1ede c\u1ea5p \u0111\u1ed9 h\u1ec7 th\u1ed1ng, con s\u1ed1 n\u00e0y t\u0103ng l\u00ean r\u1ea5t nhanh. M\u1ed9t t\u1ea3i 100 W ho\u1ea1t \u0111\u1ed9ng 24\/7 v\u1edbi b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh c\u00f3 hi\u1ec7u su\u1ea5t 50% s\u1ebd ti\u00eau th\u1ee5 th\u00eam 307 kWh m\u1ed7i n\u0103m so v\u1edbi b\u1ed9 ngu\u1ed3n SMPS c\u00f3 hi\u1ec7u su\u1ea5t 85%. V\u1edbi m\u1ee9c gi\u00e1 \u0111i\u1ec7n c\u00f4ng nghi\u1ec7p, con s\u1ed1 n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng $30\u201350 m\u1ed7i n\u0103m cho m\u1ed7i b\u1ed9 ngu\u1ed3n \u2014 m\u1ed9t con s\u1ed1 \u0111\u00e1ng k\u1ec3 khi b\u1ea1n c\u00f3 h\u00e0ng ch\u1ee5c b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n trong nh\u00e0 m\u00e1y.<\/p>\n\n <h3>Ti\u1ebfng \u1ed3n, dao \u0111\u1ed9ng v\u00e0 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI): T\u1ea1i sao m\u1ea1ch tuy\u1ebfn t\u00ednh v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c v\u1ecb tr\u00ed quan tr\u1ecdng<\/h3>\n\n <p>\u0110\u00e2y l\u00e0 l\u0129nh v\u1ef1c duy nh\u1ea5t m\u00e0 c\u00e1c ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh v\u1eabn kh\u00f4ng th\u1ec3 thay th\u1ebf. M\u1ed9t b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) t\u1ea1o ra nhi\u1ec5u t\u1eeb c\u00e1c c\u1ea1nh chuy\u1ec3n m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao: c\u00e1c gi\u00e1 tr\u1ecb di\/dt v\u00e0 dv\/dt t\u0103ng nhanh g\u00e2y ra dao \u0111\u1ed9ng d\u1eabn tr\u00ean \u0111\u1ea7u ra (th\u01b0\u1eddng l\u00e0 10\u201350 mV RMS) v\u00e0 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb b\u1ee9c x\u1ea1 (EMI) c\u00f3 th\u1ec3 x\u00e2m nh\u1eadp v\u00e0o c\u00e1c m\u1ea1ch nh\u1ea1y c\u1ea3m l\u00e2n c\u1eadn. C\u00e1c s\u00f3ng h\u00e0i c\u1ee7a t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch c\u00f3 th\u1ec3 l\u00ean \u0111\u1ebfn h\u00e0ng ch\u1ee5c MHz.<\/p>\n\n <p>Ng\u01b0\u1ee3c l\u1ea1i, ngu\u1ed3n tuy\u1ebfn t\u00ednh kh\u00f4ng c\u00f3 ho\u1ea1t \u0111\u1ed9ng chuy\u1ec3n m\u1ea1ch. \u0110\u1ed9 g\u1ee3n s\u00f3ng \u0111\u1ea7u ra c\u1ee7a n\u00f3 th\u01b0\u1eddng d\u01b0\u1edbi 1 mV RMS. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y c\u00f3 \u00fd ngh\u0129a \u2014 nh\u01b0 b\u1ed9 ti\u1ec1n khu\u1ebfch \u0111\u1ea1i \u00e2m thanh nh\u1eafm \u0111\u1ebfn t\u1ef7 l\u1ec7 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u (SNR) >100 dB, b\u1ed9 thu s\u00f3ng RF thu t\u00edn hi\u1ec7u \u1edf m\u1ee9c -120 dBm, ho\u1eb7c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u01b0\u01a1ng t\u1ef1-s\u1ed1 (ADC) ch\u00ednh x\u00e1c \u0111o microvolt \u2014 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u1eabn l\u00e0 l\u1ef1a ch\u1ecdn duy nh\u1ea5t hi\u1ec7n nay.<\/p>\n\n <p>M\u1ed9t gi\u1ea3i ph\u00e1p th\u1ecfa hi\u1ec7p th\u1ef1c t\u1ebf m\u00e0 nhi\u1ec1u k\u1ef9 s\u01b0 th\u01b0\u1eddng \u00e1p d\u1ee5ng: \u0111\u1eb7t m\u1ed9t b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh tuy\u1ebfn t\u00ednh c\u00f3 \u0111\u1ed9 s\u1ee5t \u00e1p th\u1ea5p (LDO) sau b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS). B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) \u0111\u1ea3m nh\u1eadn vi\u1ec7c h\u1ea1 \u00e1p ch\u00ednh v\u1edbi hi\u1ec7u su\u1ea5t cao, trong khi b\u1ed9 LDO l\u00e0m gi\u1ea3m nhi\u1ec5u d\u01b0 t\u1eeb 60\u201380 dB \u1edf d\u1ea3i t\u1ea7n s\u1ed1 th\u1ea5p. B\u1ea1n s\u1ebd ph\u1ea3i \u0111\u00e1nh \u0111\u1ed5i hi\u1ec7u su\u1ea5t t\u1eeb 5\u201310% \u0111\u1ec3 \u0111\u1ed5i l\u1ea5y t\u00edn hi\u1ec7u \u0111\u1ea7u ra s\u1ea1ch h\u01a1n \u0111\u00e1ng k\u1ec3.<\/p>\n\n <h3>K\u00edch th\u01b0\u1edbc v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng: V\u1eadt l\u00fd t\u1eeb t\u00ednh<\/h3>\n\n <p>S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 k\u00edch th\u01b0\u1edbc ch\u1ee7 y\u1ebfu xu\u1ea5t ph\u00e1t t\u1eeb m\u1ed9t th\u00e0nh ph\u1ea7n: b\u1ed9 bi\u1ebfn \u00e1p. B\u1ed9 bi\u1ebfn \u00e1p c\u1ee7a b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 l\u01b0\u1edbi \u0111i\u1ec7n 50 ho\u1eb7c 60 Hz, do \u0111\u00f3 c\u1ea7n m\u1ed9t l\u00f5i s\u1eaft l\u1edbn \u0111\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng b\u00e3o h\u00f2a. M\u1ed9t b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh c\u00f4ng su\u1ea5t 100 W c\u00f3 th\u1ec3 n\u1eb7ng t\u1eeb 2\u20135 kg.<\/p>\n\n <p>M\u1ed9t cu\u1ed9n d\u00e2y bi\u1ebfn \u00e1p SMPS chuy\u1ec3n m\u1ea1ch \u1edf t\u1ea7n s\u1ed1 50\u2013150 kHz \u2014 nhanh h\u01a1n kho\u1ea3ng 1.000 l\u1ea7n. Do t\u1eeb th\u00f4ng tr\u00ean m\u1ed7i chu k\u1ef3 t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi t\u1ea7n s\u1ed1, n\u00ean di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang c\u1ee7a l\u00f5i gi\u1ea3m \u0111i kho\u1ea3ng 30 l\u1ea7n. M\u1ed9t b\u1ed9 ngu\u1ed3n SMPS c\u00f4ng su\u1ea5t 240 W v\u1eeba v\u1eb7n trong l\u00f2ng b\u00e0n tay; trong khi \u0111\u00f3, b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng l\u1ea1i c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng m\u1ed9t cu\u1ed1n t\u1eeb \u0111i\u1ec3n d\u00e0y.<\/p>\n\n <p>\u0110\u1ed1i v\u1edbi c\u00e1c t\u1ee7 \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p, \u0111i\u1ec1u n\u00e0y c\u00f3 \u00fd ngh\u0129a c\u1ee5 th\u1ec3 nh\u01b0 sau: c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111\u1ee7 nh\u1eb9 \u0111\u1ec3 l\u1eafp \u0111\u1eb7t tr\u00ean thanh DIN. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh, tr\u1eeb nh\u1eefng lo\u1ea1i c\u00f3 c\u00f4ng su\u1ea5t nh\u1ecf nh\u1ea5t, th\u00ec kh\u00f4ng.<\/p>\n\n <h3>Chi ph\u00ed v\u00e0 m\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p: Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ee9c gi\u00e1<\/h3>\n\n <p>\u1ede m\u1ee9c c\u00f4ng su\u1ea5t d\u01b0\u1edbi kho\u1ea3ng 50 W, danh m\u1ee5c linh ki\u1ec7n c\u1ee7a b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 r\u1ebb h\u01a1n: ch\u1ec9 c\u1ea7n m\u1ed9t bi\u1ebfn \u00e1p, c\u1ea7u ch\u1ec9nh l\u01b0u, t\u1ee5 l\u1ecdc v\u00e0 m\u1ed9t IC \u0111i\u1ec1u ch\u1ec9nh nh\u01b0 LM7805 ($0.15\u20130.50) l\u00e0 \u0111\u1ee7 \u0111\u1ec3 ho\u00e0n th\u00e0nh nhi\u1ec7m v\u1ee5. Khi v\u01b0\u1ee3t qua ng\u01b0\u1ee1ng chuy\u1ec3n ti\u1ebfp 50\u201375 W, chi ph\u00ed cho bi\u1ebfn \u00e1p v\u00e0 t\u1ea3n nhi\u1ec7t c\u1ee7a b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh s\u1ebd t\u0103ng v\u1ecdt. B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS), m\u1eb7c d\u00f9 c\u00f3 s\u1ed1 l\u01b0\u1ee3ng linh ki\u1ec7n nhi\u1ec1u h\u01a1n nh\u01b0ng s\u1eed d\u1ee5ng c\u00e1c linh ki\u1ec7n t\u1eeb t\u00ednh nh\u1ecf h\u01a1n, tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn kinh t\u1ebf h\u01a1n.<\/p>\n\n <p>Tuy nhi\u00ean, chi ph\u00ed \u0111\u01a1n v\u1ecb kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 duy nh\u1ea5t c\u1ea7n xem x\u00e9t. N\u1ebfu t\u00ednh \u0111\u1ebfn l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c v\u00e0 nhu c\u1ea7u l\u00e0m m\u00e1t gi\u1ea3m b\u1edbt trong su\u1ed1t v\u00f2ng \u0111\u1eddi s\u1eed d\u1ee5ng t\u1eeb 5 \u0111\u1ebfn 10 n\u0103m, th\u00ec b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) th\u01b0\u1eddng c\u00f3 l\u1ee3i th\u1ebf h\u01a1n v\u1ec1 t\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu ngay c\u1ea3 \u1edf m\u1ee9c c\u00f4ng su\u1ea5t trung b\u00ecnh \u2014 \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c.<\/p>\n\n <h2>L\u0129nh v\u1ef1c m\u00e0 t\u1eebng lo\u1ea1i ph\u00e1t huy th\u1ebf m\u1ea1nh: H\u01b0\u1edbng d\u1eabn \u1ee9ng d\u1ee5ng trong th\u1ef1c t\u1ebf<\/h2>\n\n <p>Ba c\u00e2u h\u1ecfi gi\u00fap b\u1ea1n x\u00e1c \u0111\u1ecbnh h\u01b0\u1edbng \u0111i tr\u01b0\u1edbc khi l\u1ef1a ch\u1ecdn c\u1ea5u tr\u00fac m\u1ea1ng ph\u00f9 h\u1ee3p v\u1edbi m\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3:<\/p>\n\n <ol>\n <li><strong>T\u1ea3i c\u1ee7a t\u00f4i nh\u1ea1y c\u1ea3m v\u1edbi ti\u1ebfng \u1ed3n \u0111\u1ebfn m\u1ee9c n\u00e0o?<\/strong> N\u1ebfu m\u1ea1ch c\u1ee7a b\u1ea1n \u0111o \u0111\u01a1n v\u1ecb microvolt ho\u1eb7c khu\u1ebfch \u0111\u1ea1i \u00e2m thanh, h\u00e3y \u01b0u ti\u00ean ch\u1ecdn lo\u1ea1i tuy\u1ebfn t\u00ednh.<\/li>\n <li><strong>M\u1ee9c c\u00f4ng su\u1ea5t v\u00e0 dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef c\u1ee7a t\u00f4i l\u00e0 bao nhi\u00eau?<\/strong> Khi c\u00f4ng su\u1ea5t v\u01b0\u1ee3t qu\u00e1 50 W ho\u1eb7c trong m\u00f4i tr\u01b0\u1eddng k\u00edn, SMPS s\u1ebd tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh.<\/li>\n <li><strong>T\u00f4i c\u00f3 c\u1ea7n b\u1ed9 t\u0103ng \u00e1p, nhi\u1ec1u \u0111\u1ea7u ra hay c\u00e1ch ly \u0111i\u1ec7n kh\u00f4ng?<\/strong> N\u1ebfu \u0111\u00fang, b\u1ea1n c\u1ea7n m\u1ed9t c\u1ea5u tr\u00fac chuy\u1ec3n m\u1ea1ch. C\u00e1c b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh ch\u1ec9 c\u00f3 th\u1ec3 h\u1ea1 \u00e1p.<\/li>\n <\/ol>\n\n <h3>Khi ph\u01b0\u01a1ng ph\u00e1p tuy\u1ebfn t\u00ednh l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p<\/h3>\n\n <p>Ng\u00e0y nay, b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh ch\u1ec9 chi\u1ebfm m\u1ed9t th\u1ecb tr\u01b0\u1eddng ng\u00e1ch, nh\u01b0ng trong th\u1ecb tr\u01b0\u1eddng ng\u00e1ch \u0111\u00f3, ch\u00fang l\u00e0 l\u1ef1a ch\u1ecdn kh\u00f4ng th\u1ec3 thay th\u1ebf:<\/p>\n\n <ul>\n <li><strong>Thi\u1ebft b\u1ecb ph\u00f2ng th\u00ed nghi\u1ec7m v\u00e0 thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m<\/strong>: M\u00e1y hi\u1ec7n s\u00f3ng, m\u00e1y ph\u00e2n t\u00edch ph\u1ed5 v\u00e0 m\u00e1y t\u1ea1o t\u00edn hi\u1ec7u c\u1ea7n c\u00f3 m\u1ee9c nhi\u1ec5u n\u1ec1n \u0111\u1ee7 th\u1ea5p \u0111\u1ec3 ngu\u1ed3n \u0111i\u1ec7n kh\u00f4ng che l\u1ea5p t\u00edn hi\u1ec7u m\u00e0 b\u1ea1n \u0111ang c\u1ed1 g\u1eafng \u0111o.<\/li>\n <li><strong>Thi\u1ebft b\u1ecb y t\u1ebf<\/strong>: C\u00e1c m\u00e1y \u0111o \u0111i\u1ec7n t\u00e2m \u0111\u1ed3 (ECG) v\u00e0 \u0111i\u1ec7n n\u00e3o \u0111\u1ed3 (EEG), m\u00e1y theo d\u00f5i b\u1ec7nh nh\u00e2n v\u00e0 thi\u1ebft b\u1ecb ph\u1eabu thu\u1eadt ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb (EMC) theo ti\u00eau chu\u1ea9n IEC 60601-1-2. M\u1ee9c ph\u00e1t x\u1ea1 \u0111i\u1ec7n t\u1eeb (EMI) th\u1ea5p t\u1eeb ngu\u1ed3n \u0111i\u1ec7n l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 tu\u00e2n th\u1ee7, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 li\u00ean quan \u0111\u1ebfn hi\u1ec7u su\u1ea5t.<\/li>\n <li><strong>\u00c2m thanh ch\u1ea5t l\u01b0\u1ee3ng cao<\/strong>: C\u00e1c b\u1ed9 ti\u1ec1n khu\u1ebfch \u0111\u1ea1i, b\u1ed9 khu\u1ebfch \u0111\u1ea1i phono v\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i s\u1ed1 sang analog (DAC) s\u1ebd khu\u1ebfch \u0111\u1ea1i m\u1ecdi nhi\u1ec5u t\u1eeb ngu\u1ed3n \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp v\u00e0o chu\u1ed7i t\u00edn hi\u1ec7u. \u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng nh\u1eafm \u0111\u1ebfn t\u1ef7 l\u1ec7 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u (SNR) tr\u00ean 100 dB, \u0111\u1ed9 g\u1ee3n c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n d\u01b0\u1edbi 500 \u00b5V RMS l\u00e0 ti\u00eau chu\u1ea9n t\u1ed1i thi\u1ec3u.<\/li>\n <li><strong>Thi\u1ebft b\u1ecb t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RF) v\u00e0 thi\u1ebft b\u1ecb kh\u00f4ng d\u00e2y<\/strong>: C\u00e1c m\u1ea1ch ti\u1ec1n khu\u1ebfch \u0111\u1ea1i c\u1ee7a b\u1ed9 thu ho\u1ea1t \u0111\u1ed9ng \u1edf \u0111\u1ed9 nh\u1ea1y -120 dBm kh\u00f4ng th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c c\u00e1c s\u00f3ng h\u00e0i do qu\u00e1 tr\u00ecnh chuy\u1ec3n m\u1ea1ch t\u1eeb \u0111\u01b0\u1eddng ngu\u1ed3n g\u00e2y ra.<\/li>\n <\/ul>\n\n <h3>Khi s\u1ef1 chuy\u1ec3n \u0111\u1ed5i chi\u1ebfm \u01b0u th\u1ebf<\/h3>\n\n <p>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch l\u00e0 l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i, v\u00e0 \u0111i\u1ec1u n\u00e0y ho\u00e0n to\u00e0n c\u00f3 l\u00fd do ch\u00ednh \u0111\u00e1ng:<\/p>\n\n <ul>\n <li><strong>T\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p<\/strong>: C\u00e1c b\u1ed9 ngu\u1ed3n 24 VDC g\u1eafn tr\u00ean thanh DIN d\u00f9ng \u0111\u1ec3 c\u1ea5p ngu\u1ed3n cho PLC, c\u1ea3m bi\u1ebfn v\u00e0 c\u00e1c m\u00f4-\u0111un I\/O h\u1ea7u h\u1ebft \u0111\u1ec1u l\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS). Ch\u00fang h\u1ed7 tr\u1ee3 \u0111\u1ea7u v\u00e0o AC \u0111a d\u1ea3i (85\u2013264 VAC, 50\/60 Hz), ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n c\u1ee7a thanh DIN v\u00e0 cung c\u1ea5p c\u00f4ng su\u1ea5t t\u1eeb 15 W \u0111\u1ebfn 960 W trong m\u1ed9t thi\u1ebft k\u1ebf nh\u1ecf g\u1ecdn. \u0110\u1ed1i v\u1edbi c\u00e1c t\u1ee7 \u0111i\u1ec1u khi\u1ec3n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo ti\u00eau chu\u1ea9n UL 508A, b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch l\u00e0 ti\u00eau chu\u1ea9n th\u1ef1c ti\u1ec5n \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng.<\/li>\n <li><strong>H\u1ec7 th\u1ed1ng c\u00f4ng su\u1ea5t cao<\/strong>: C\u00e1c gi\u00e1 \u0111\u1eb7t m\u00e1y ch\u1ee7 (hi\u1ec7u su\u1ea5t 80 PLUS Titanium \u1edf model 96%), tr\u1ea1m ph\u00e1t s\u00f3ng vi\u1ec5n th\u00f4ng, h\u1ea1 t\u1ea7ng s\u1ea1c xe \u0111i\u1ec7n v\u00e0 c\u00e1c quy tr\u00ecnh c\u00f4ng nghi\u1ec7p nh\u01b0 m\u1ea1 \u0111i\u1ec7n \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c c\u00f4ng su\u1ea5t m\u00e0 c\u00e1c b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh \u0111\u01a1n thu\u1ea7n kh\u00f4ng th\u1ec3 \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c.<\/li>\n <li><strong>C\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng v\u00e0 ch\u1ea1y b\u1eb1ng pin<\/strong>: M\u1ecdi b\u1ed9 s\u1ea1c \u0111i\u1ec7n tho\u1ea1i, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n cho m\u00e1y t\u00ednh x\u00e1ch tay v\u00e0 thi\u1ebft b\u1ecb c\u1ea7m tay \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a th\u1eddi l\u01b0\u1ee3ng s\u1eed d\u1ee5ng v\u00e0 gi\u1ea3m thi\u1ec3u l\u01b0\u1ee3ng nhi\u1ec7t t\u1ecfa ra.<\/li>\n <li><strong>C\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n \u00e1p linh ho\u1ea1t<\/strong>: C\u00e1c c\u1ea5u tr\u00fac m\u1ea1ch Boost, buck-boost, flyback, forward v\u00e0 c\u00e1ch ly \u0111\u1ec1u l\u00e0 c\u00e1c m\u1ea1ch chuy\u1ec3n m\u1ea1ch thu\u1ea7n t\u00fay. C\u00e1c ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf chuy\u1ec3n \u0111\u1ed5i h\u1ea1 \u00e1p (buck).<\/li>\n <\/ul>\n\n <h3>Ph\u01b0\u01a1ng ph\u00e1p k\u1ebft h\u1ee3p: \u0110\u1ea3m b\u1ea3o c\u1ea3 hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ed9 \u1ed3n th\u1ea5p<\/h3>\n\n <p>M\u1ed9t chi\u1ebfn l\u01b0\u1ee3c \u0111\u00e1ng \u0111\u01b0\u1ee3c quan t\u00e2m h\u01a1n: s\u1eed d\u1ee5ng b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh chuy\u1ec3n m\u1ea1ch (SMPS) cho giai \u0111o\u1ea1n h\u1ea1 \u00e1p ch\u00ednh c\u00f3 hi\u1ec7u su\u1ea5t cao, sau \u0111\u00f3 d\u00f9ng b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p LDO \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh ti\u1ebfp tr\u00ean c\u00e1c \u0111\u01b0\u1eddng ngu\u1ed3n nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec5u. \u0110\u1ed1i v\u1edbi m\u1ed9t bo m\u1ea1ch t\u00edn hi\u1ec7u h\u1ed7n h\u1ee3p, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 MCU v\u00e0 m\u1ea1ch logic s\u1ed1 \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n tr\u1ef1c ti\u1ebfp t\u1eeb b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS), trong khi c\u00e1c \u0111\u01b0\u1eddng ngu\u1ed3n c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u01b0\u01a1ng t\u1ef1-s\u1ed1 (ADC) v\u00e0 b\u1ed9 khu\u1ebfch \u0111\u1ea1i v\u1eadn h\u00e0nh (op-amp) \u0111i qua b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p LDO. Hi\u1ec7u su\u1ea5t t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng hi\u1ec7u su\u1ea5t c\u1ee7a SMPS nh\u00e2n v\u1edbi (Vout_LDO \/ Vin_LDO) \u2014 th\u01b0\u1eddng \u0111\u1ea1t 80\u201390% t\u1ed5ng th\u1ec3, v\u1edbi nhi\u1ec5u \u0111\u1ea7u ra d\u01b0\u1edbi 1 mV RMS.<\/p>\n\n <p>M\u1ed9t chi ti\u1ebft tri\u1ec3n khai \u0111\u00e1ng ch\u00fa \u00fd: kh\u1ea3 n\u0103ng kh\u1eed nhi\u1ec5u ngu\u1ed3n (PSRR) c\u1ee7a b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p tuy\u1ebfn t\u00ednh (LDO) gi\u1ea3m d\u1ea7n \u1edf c\u00e1c t\u1ea7n s\u1ed1 cao h\u01a1n, th\u01b0\u1eddng gi\u1ea3m t\u1eeb 60\u201380 dB \u1edf 120 Hz xu\u1ed1ng c\u00f2n 20\u201330 dB \u1edf t\u1ea7n s\u1ed1 tr\u00ean 100 kHz. \u0110\u1ec3 b\u00f9 \u0111\u1eafp, b\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn m\u1ed9t b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) c\u00f3 t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch th\u1ea5p h\u01a1n (<100 kHz) ho\u1eb7c th\u00eam m\u1ed9t b\u1ed9 l\u1ecdc LC gi\u1eefa \u0111\u1ea7u ra c\u1ee7a SMPS v\u00e0 \u0111\u1ea7u v\u00e0o c\u1ee7a LDO, v\u1edbi t\u1ea7n s\u1ed1 c\u1eaft \u0111\u01b0\u1ee3c \u0111\u1eb7t kho\u1ea3ng b\u1eb1ng m\u1ed9t ph\u1ea7n m\u01b0\u1eddi t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch.<\/p>\n\n \n <div class=\"bp-card-hybrid bd-reveal\">\n <div class=\"bp-hybrid-icon\">\n <svg width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect x=\"4\" y=\"4\" width=\"16\" height=\"16\" rx=\"2\" ry=\"2\"\/><rect x=\"9\" y=\"9\" width=\"6\" height=\"6\"\/><line x1=\"9\" y1=\"1\" x2=\"9\" y2=\"4\"\/><line x1=\"15\" y1=\"1\" x2=\"15\" y2=\"4\"\/><line x1=\"9\" y1=\"20\" x2=\"9\" y2=\"23\"\/><line x1=\"15\" y1=\"20\" x2=\"15\" y2=\"23\"\/><line x1=\"20\" y1=\"9\" x2=\"23\" y2=\"9\"\/><line x1=\"20\" y1=\"14\" x2=\"23\" y2=\"14\"\/><line x1=\"1\" y1=\"9\" x2=\"4\" y2=\"9\"\/><line x1=\"1\" y1=\"14\" x2=\"4\" y2=\"14\"\/><\/svg>\n <\/div>\n <div class=\"bp-hybrid-body\">\n <h4>\u0110i\u1ec3m t\u1ed1i \u01b0u c\u1ee7a c\u00f4ng ngh\u1ec7 lai<\/h4>\n <p>M\u1ed9t b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) \u0111\u1ea3m nh\u1eadn vi\u1ec7c h\u1ea1 \u00e1p ch\u00ednh v\u1edbi hi\u1ec7u su\u1ea5t t\u1eeb 85\u201395%. M\u1ed9t b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p tuy\u1ebfn t\u00ednh (LDO) l\u00e0m s\u1ea1ch t\u00edn hi\u1ec7u \u0111\u1ea7u ra xu\u1ed1ng m\u1ee9c nhi\u1ec5u RMS <1 mV. B\u1ea1n s\u1ebd ph\u1ea3i \u0111\u00e1nh \u0111\u1ed5i hi\u1ec7u su\u1ea5t t\u1eeb 5\u201310% \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c ngu\u1ed3n \u0111i\u1ec7n \u0111\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c cao \u2014 c\u00f9ng ki\u1ebfn tr\u00fac \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong thi\u1ebft k\u1ebf PCB t\u00edn hi\u1ec7u h\u1ed7n h\u1ee3p.<\/p>\n <div class=\"bp-hybrid-badges\">\n <span class=\"bp-badge\">K\u1ef9 thu\u1eadt s\u1ed1 + T\u01b0\u01a1ng t\u1ef1<\/span>\n <span class=\"bp-badge\">H\u1ec7 th\u1ed1ng RF<\/span>\n <span class=\"bp-badge\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u01b0\u01a1ng t\u1ef1-s\u1ed1 (ADC) ch\u00ednh x\u00e1c<\/span>\n <\/div>\n <\/div>\n <\/div>\n\n <h2>V\u01b0\u1ee3t ra ngo\u00e0i b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt: L\u1ef1a ch\u1ecdn nh\u00e0 cung c\u1ea5p b\u1ed9 ngu\u1ed3n<\/h2>\n\n <p>Vi\u1ec7c l\u1ef1a ch\u1ecdn c\u1ea5u tr\u00fac m\u1ea1ng ph\u00f9 h\u1ee3p ch\u1ec9 l\u00e0 m\u1ed9t n\u1eeda c\u1ee7a v\u1ea5n \u0111\u1ec1. Hai b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt tr\u00ean gi\u1ea5y t\u1edd gi\u1ed1ng h\u1ec7t nhau c\u00f3 th\u1ec3 mang l\u1ea1i \u0111\u1ed9 tin c\u1eady ho\u00e0n to\u00e0n kh\u00e1c nhau khi v\u1eadn h\u00e0nh th\u1ef1c t\u1ebf. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y n\u1eb1m \u1edf ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t, ngu\u1ed3n g\u1ed1c linh ki\u1ec7n v\u00e0 m\u1ee9c \u0111\u1ed9 nghi\u00eam ng\u1eb7t trong qu\u00e1 tr\u00ecnh ki\u1ec3m tra.<\/p>\n\n <h3>C\u00e1c ch\u1ee9ng ch\u1ec9 c\u00f3 gi\u00e1 tr\u1ecb<\/h3>\n\n <p>\u0110\u1ed1i v\u1edbi ho\u1ea1t \u0111\u1ed9ng mua s\u1eafm xuy\u00ean bi\u00ean gi\u1edbi, c\u00e1c ch\u1ee9ng nh\u1eadn kh\u00f4ng ph\u1ea3i l\u00e0 \u0111i\u1ec1u t\u00f9y ch\u1ecdn. Ch\u00fang quy\u1ebft \u0111\u1ecbnh li\u1ec7u l\u00f4 h\u00e0ng c\u1ee7a b\u1ea1n c\u00f3 \u0111\u01b0\u1ee3c th\u00f4ng quan hay kh\u00f4ng v\u00e0 li\u1ec7u thi\u1ebft b\u1ecb c\u1ee7a kh\u00e1ch h\u00e0ng cu\u1ed1i c\u00f3 v\u01b0\u1ee3t qua cu\u1ed9c ki\u1ec3m to\u00e1n tu\u00e2n th\u1ee7 c\u1ee7a ch\u00ednh h\u1ecd hay kh\u00f4ng:<\/p>\n\n <ul>\n <li><strong>Li\u00ean minh ch\u00e2u \u00c2u<\/strong>: D\u1ea5u CE y\u00eau c\u1ea7u ph\u1ea3i tu\u00e2n th\u1ee7 Ch\u1ec9 th\u1ecb v\u1ec1 \u0110i\u1ec7n \u00e1p Th\u1ea5p (LVD 2014\/35\/EU) v\u1ec1 an to\u00e0n v\u00e0 Ch\u1ec9 th\u1ecb v\u1ec1 T\u01b0\u01a1ng th\u00edch \u0110i\u1ec7n t\u1eeb (EMC) (2014\/30\/EU). Ri\u00eang \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS), ti\u00eau chu\u1ea9n IEC 61204-3 quy \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u v\u1ec1 t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb (EMC) \u0111\u1ed1i v\u1edbi b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111i\u1ec7n \u00e1p th\u1ea5p.<\/li>\n <li><strong>B\u1eafc M\u1ef9<\/strong>: Ti\u00eau chu\u1ea9n UL 508 \u00e1p d\u1ee5ng cho thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p. \u0110\u00e2y l\u00e0 ti\u00eau chu\u1ea9n kh\u1eaft khe h\u01a1n so v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n UL 60950\/62368 d\u00e0nh cho thi\u1ebft b\u1ecb ti\u00eau d\u00f9ng. N\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n li\u00ean quan \u0111\u1ebfn t\u1ee7 \u0111i\u1ec1u khi\u1ec3n, h\u00e3y y\u00eau c\u1ea7u s\u1ea3n ph\u1ea9m ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn theo ti\u00eau chu\u1ea9n UL 508.<\/li>\n <li><strong>Trung Qu\u1ed1c v\u00e0 ch\u00e2u \u00c1<\/strong>: CCC (Ch\u1ee9ng nh\u1eadn b\u1eaft bu\u1ed9c c\u1ee7a Trung Qu\u1ed1c) l\u00e0 y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c b\u00e1n v\u00e0o th\u1ecb tr\u01b0\u1eddng Trung Qu\u1ed1c.<\/li>\n <li><strong>M\u1ee9c c\u01a1 s\u1edf qu\u1ed1c t\u1ebf<\/strong>: Ch\u1ee9ng nh\u1eadn ISO 9001:2015 l\u00e0 \u0111i\u1ec1u ki\u1ec7n t\u1ed1i thi\u1ec3u trong qu\u1ea3n l\u00fd ch\u1ea5t l\u01b0\u1ee3ng. Vi\u1ec7c c\u00f3 ch\u1ee9ng nh\u1eadn n\u00e0y kh\u00f4ng \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m \u2014 nh\u01b0ng vi\u1ec7c thi\u1ebfu ch\u1ee9ng nh\u1eadn l\u1ea1i l\u00e0 m\u1ed9t d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o.<\/li>\n <\/ul>\n\n <p>Khi xem x\u00e9t c\u00e1c ch\u1ee9ng nh\u1eadn c\u1ee7a nh\u00e0 cung c\u1ea5p, \u0111\u1eebng ch\u1ec9 nh\u00ecn v\u00e0o c\u00e1c bi\u1ec3u t\u01b0\u1ee3ng. H\u00e3y y\u00eau c\u1ea7u cung c\u1ea5p s\u1ed1 ch\u1ee9ng nh\u1eadn, ki\u1ec3m tra xem ph\u1ea1m vi \u00e1p d\u1ee5ng c\u00f3 bao g\u1ed3m d\u1ea3i c\u00f4ng su\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m c\u1ee7a b\u1ea1n hay kh\u00f4ng, v\u00e0 x\u00e1c nh\u1eadn r\u1eb1ng c\u00e1c ch\u1ee9ng nh\u1eadn \u0111\u00f3 v\u1eabn c\u00f2n hi\u1ec7u l\u1ef1c.<\/p>\n\n <h3>C\u00e1c ch\u1ec9 s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t<\/h3>\n\n <p>C\u00f9ng m\u1ed9t c\u1ea5u tr\u00fac m\u1ea1ch, c\u00f9ng m\u1ed9t chip \u0111i\u1ec1u khi\u1ec3n, th\u1eadm ch\u00ed c\u00f9ng m\u1ed9t danh s\u00e1ch v\u1eadt li\u1ec7u (BOM) \u2014 nh\u01b0ng hai nh\u00e0 m\u00e1y l\u1ea1i c\u00f3 th\u1ec3 s\u1ea3n xu\u1ea5t ra c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 t\u1ef7 l\u1ec7 h\u1ecfng h\u00f3c trong th\u1ef1c t\u1ebf ch\u00eanh l\u1ec7ch t\u1eeb 3 \u0111\u1ebfn 5 l\u1ea7n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 d\u1eabn \u0111\u1ebfn s\u1ef1 ch\u00eanh l\u1ec7ch n\u00e0y:<\/p>\n\n <p><strong>Mua s\u1eafm linh ki\u1ec7n v\u00e0 ki\u1ec3m tra h\u00e0ng nh\u1eadp.<\/strong> T\u1ee5 \u0111i\u1ec7n \u0111i\u1ec7n ph\u00e2n l\u00e0 nguy\u00ean nh\u00e2n h\u1ecfng h\u00f3c h\u00e0ng \u0111\u1ea7u trong c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch. Tu\u1ed5i th\u1ecd c\u1ee7a ch\u00fang tu\u00e2n theo \u0111\u1ecbnh lu\u1eadt Arrhenius: m\u1ed7i khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng 10\u00b0C, tu\u1ed5i th\u1ecd d\u1ef1 ki\u1ebfn s\u1ebd gi\u1ea3m m\u1ed9t n\u1eeda. M\u1ed9t nh\u00e0 cung c\u1ea5p s\u1eed d\u1ee5ng t\u1ee5 \u0111i\u1ec7n c\u1ee7a c\u00e1c th\u01b0\u01a1ng hi\u1ec7u n\u1ed5i ti\u1ebfng (Rubycon, Nichicon, Panasonic) c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 105\u00b0C v\u00e0 tu\u1ed5i th\u1ecd 5.000\u201310.000 gi\u1edd, \u0111\u1ed3ng th\u1eddi ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng khi nh\u1eadp h\u00e0ng, s\u1ebd ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ed9t \u0111\u1eb3ng c\u1ea5p ho\u00e0n to\u00e0n kh\u00e1c so v\u1edbi nh\u00e0 cung c\u1ea5p ch\u1ec9 mua t\u1ee5 \u0111i\u1ec7n kh\u00f4ng th\u01b0\u01a1ng hi\u1ec7u d\u1ef1a tr\u00ean gi\u00e1 c\u1ea3.<\/p>\n\n <p><strong>Ki\u1ec3m so\u00e1t quy tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/strong> C\u00e1c d\u00e2y chuy\u1ec1n l\u1eafp \u0111\u1eb7t SMT t\u1ef1 \u0111\u1ed9ng \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng m\u1ed1i h\u00e0n \u0111\u1ed3ng \u0111\u1ec1u tr\u00ean h\u00e0ng ngh\u00ecn s\u1ea3n ph\u1ea9m. T\u1ef7 l\u1ec7 \u0111\u1ea1t chu\u1ea9n ngay t\u1eeb l\u1ea7n \u0111\u1ea7u tr\u00ean 98% cho th\u1ea5y h\u1ec7 th\u1ed1ng ki\u1ec3m so\u00e1t quy tr\u00ecnh \u0111\u00e3 \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 ho\u00e0n thi\u1ec7n. N\u1ebfu t\u1ef7 l\u1ec7 n\u00e0y d\u01b0\u1edbi 95%, vi\u1ec7c s\u1eeda ch\u1eefa l\u1ea1i s\u1ebd th\u01b0\u1eddng xuy\u00ean x\u1ea3y ra, v\u00e0 c\u00e1c bo m\u1ea1ch \u0111\u00e3 qua s\u1eeda ch\u1eefa c\u00f3 t\u1ef7 l\u1ec7 h\u1ecfng h\u00f3c ti\u1ec1m \u1ea9n cao h\u01a1n.<\/p>\n\n <p><strong>Ki\u1ec3m tra cu\u1ed1i d\u00e2y chuy\u1ec1n.<\/strong> C\u00e2u h\u1ecfi then ch\u1ed1t: Nh\u00e0 m\u00e1y c\u00f3 th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m ch\u1ea1y t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 100% hay ch\u1ec9 ti\u1ebfn h\u00e0nh ki\u1ec3m tra ng\u1eabu nhi\u00ean tr\u00ean m\u1eabu? M\u1ed9t quy tr\u00ecnh ch\u1ea1y t\u1ea3i \u0111\u00fang chu\u1ea9n s\u1ebd v\u1eadn h\u00e0nh t\u1eebng thi\u1ebft b\u1ecb \u1edf m\u1ee9c t\u1ea3i \u0111\u1ecbnh m\u1ee9c t\u1ed1i \u0111a trong 4\u201324 gi\u1edd trong m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec7t \u0111\u1ed9 40\u201360\u00b0C, nh\u1eb1m lo\u1ea1i b\u1ecf c\u00e1c s\u1ef1 c\u1ed1 h\u1ecfng h\u00f3c s\u1edbm tr\u01b0\u1edbc khi s\u1ea3n ph\u1ea9m \u0111\u1ebfn tay kh\u00e1ch h\u00e0ng. K\u1ebft h\u1ee3p v\u1edbi c\u00e1c th\u1eed nghi\u1ec7m ch\u1ee9c n\u0103ng theo ti\u00eau chu\u1ea9n 100% \u2014 \u0111i\u1ec1u ch\u1ec9nh t\u1ea3i, \u0111\u1ed9 g\u1ee3n v\u00e0 nhi\u1ec5u, \u0111\u01b0\u1eddng cong hi\u1ec7u su\u1ea5t, v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111i\u1ec7n m\u00f4i \u2014 \u0111i\u1ec1u n\u00e0y gi\u00fap ph\u00e2n bi\u1ec7t c\u00e1c s\u1ea3n ph\u1ea9m th\u00f4ng th\u01b0\u1eddng v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m c\u1ea5p c\u00f4ng nghi\u1ec7p.<\/p>\n\n <p><strong>\u0110\u1ed9 s\u00e2u c\u1ee7a chu\u1ed7i cung \u1ee9ng.<\/strong> M\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t s\u1edf h\u1eefu d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t c\u1ee7a ri\u00eang m\u00ecnh c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t th\u1eddi gian giao h\u00e0ng, s\u1ef1 \u1ed5n \u0111\u1ecbnh v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 kh\u1ea3 n\u0103ng t\u00f9y ch\u1ec9nh. Ng\u01b0\u1ee3c l\u1ea1i, m\u1ed9t c\u00f4ng ty th\u01b0\u01a1ng m\u1ea1i ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c nh\u00e0 m\u00e1y th\u01b0\u1ee3ng ngu\u1ed3n th\u00ec kh\u00f4ng ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c b\u1ea5t k\u1ef3 y\u1ebfu t\u1ed1 n\u00e0o trong s\u1ed1 n\u00e0y. \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi mua \u0111\u1eb7t h\u00e0ng l\u1eb7p l\u1ea1i ho\u1eb7c c\u00f3 nhu c\u1ea7u \u0111i\u1ec1u ch\u1ec9nh theo m\u00f4 h\u00ecnh OEM\/ODM, s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y c\u00f3 \u00fd ngh\u0129a v\u00f4 c\u00f9ng quan tr\u1ecdng.<\/p>\n\n \n <div class=\"bp-checklist bd-reveal\">\n <div class=\"bp-checklist-title\">Danh s\u00e1ch ki\u1ec3m tra c\u00e1c ch\u1ec9 s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng<\/div>\n <div class=\"bp-check-rows\">\n <div class=\"bp-check-row\">\n <svg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg>\n <span>T\u1ee5 \u0111i\u1ec7n ph\u00e2n th\u01b0\u01a1ng hi\u1ec7u c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt 105\u00b0C \/ 5.000\u201310.000 gi\u1edd<\/span>\n <\/div>\n <div class=\"bp-check-row\">\n <svg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg>\n <span>C\u00e1c d\u00e2y chuy\u1ec1n SMT t\u1ef1 \u0111\u1ed9ng c\u00f3 t\u1ef7 l\u1ec7 \u0111\u1ea1t chu\u1ea9n ngay t\u1eeb l\u1ea7n \u0111\u1ea7u tr\u00ean 98%<\/span>\n <\/div>\n <div class=\"bp-check-row\">\n <svg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg>\n <span>Th\u1eed nghi\u1ec7m ch\u1ea1y th\u1eed t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 100% (4\u201324 gi\u1edd \u1edf nhi\u1ec7t \u0111\u1ed9 40\u201360\u00b0C)<\/span>\n <\/div>\n <div class=\"bp-check-row\">\n <svg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg>\n <span>Nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t thu\u1ed9c s\u1edf h\u1eefu c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t (kh\u00f4ng ph\u1ea3i c\u00f4ng ty th\u01b0\u01a1ng m\u1ea1i)<\/span>\n <\/div>\n <\/div>\n <\/div>\n\n <h2>Quy\u1ebft \u0111\u1ecbnh cu\u1ed1i c\u00f9ng: Ngu\u1ed3n tuy\u1ebfn t\u00ednh hay ngu\u1ed3n chuy\u1ec3n m\u1ea1ch?<\/h2>\n\n <p>\u0110\u1ebfn l\u00fac n\u00e0y, xu h\u01b0\u1edbng h\u1eb3n \u0111\u00e3 r\u00f5 r\u00e0ng: kh\u00f4ng c\u00f3 kh\u00e1i ni\u1ec7m \u201ct\u1ed1t h\u01a1n\u201d mang t\u00ednh ph\u1ed5 qu\u00e1t. Ch\u1ec9 c\u00f3 \u201ct\u1ed1t h\u01a1n cho <em>c\u1ee7a b\u1ea1n<\/em> \u1ee9ng d\u1ee5ng.\u201d H\u00e3y s\u1eed d\u1ee5ng b\u1ea3ng quy\u1ebft \u0111\u1ecbnh n\u00e0y nh\u01b0 m\u1ed9t t\u00e0i li\u1ec7u tham kh\u1ea3o nhanh:<\/p>\n\n <div class=\"table-wrapper\">\n <table>\n <thead><tr><th>N\u1ebfu \u01b0u ti\u00ean c\u1ee7a b\u1ea1n l\u00e0\u2026<\/th><th>L\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t c\u1ee7a b\u1ea1n l\u00e0\u2026<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>\u0110\u1ed9 nhi\u1ec5u c\u1ef1c th\u1ea5p cho c\u00e1c m\u1ea1ch t\u01b0\u01a1ng t\u1ef1 ch\u00ednh x\u00e1c<\/td><td>B\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh<\/td><\/tr>\n <tr><td>Hi\u1ec7u su\u1ea5t t\u1ed1i \u0111a v\u00e0 nhi\u1ec7t sinh ra t\u1ed1i thi\u1ec3u<\/td><td>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/td><\/tr>\n <tr><td>K\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn v\u00e0 l\u1eafp \u0111\u1eb7t tr\u00ean thanh DIN<\/td><td>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/td><\/tr>\n <tr><td>Thi\u1ebft k\u1ebf \u0111\u01a1n gi\u1ea3n, chi ph\u00ed BOM th\u1ea5p nh\u1ea5t d\u01b0\u1edbi 50 W<\/td><td>B\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh<\/td><\/tr>\n <tr><td>C\u00f4ng su\u1ea5t cao tr\u00ean 100 W<\/td><td>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/td><\/tr>\n <tr><td>C\u1ea3 hai y\u1ebfu t\u1ed1 hi\u1ec7u qu\u1ea3 <em>v\u00e0<\/em> ti\u1ebfng \u1ed3n th\u1ea5p<\/td><td>H\u1ec7 th\u1ed1ng lai: SMPS + LDO \u0111i\u1ec1u ch\u1ec9nh sau<\/td><\/tr>\n <tr><td>Ch\u1ea5t l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh trong c\u00e1c \u0111\u01a1n h\u00e0ng l\u1eb7p l\u1ea1i<\/td><td>H\u1ee3p t\u00e1c v\u1edbi m\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t s\u1edf h\u1eefu c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t ri\u00eang<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>N\u1ebfu b\u1ea1n ch\u1ec9 c\u00f3 th\u1ec3 ghi nh\u1edb m\u1ed9t nguy\u00ean t\u1eafc chung: khi c\u00f4ng su\u1ea5t tr\u00ean 50 W ho\u1eb7c kh\u00f4ng gian b\u1ecb h\u1ea1n ch\u1ebf, h\u00e3y ch\u1ecdn m\u1ea1ch chuy\u1ec3n m\u1ea1ch; khi y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 \u1ed3n cao v\u00e0 c\u00f4ng su\u1ea5t d\u01b0\u1edbi 50 W, h\u00e3y ch\u1ecdn m\u1ea1ch tuy\u1ebfn t\u00ednh; n\u1ebfu c\u1ea7n c\u1ea3 hai y\u1ebfu t\u1ed1, h\u00e3y ch\u1ecdn m\u1ea1ch lai.<\/p>\n\n \n <div class=\"bp-cta-end bd-reveal\">\n <svg width=\"28\" height=\"28\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"\/><\/svg>\n <h4>H\u00e3y t\u1ef1 tin l\u1ef1a ch\u1ecdn th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cho b\u1ed9 ngu\u1ed3n ti\u1ebfp theo c\u1ee7a b\u1ea1n<\/h4>\n <p>So s\u00e1nh c\u00e1c l\u1ef1a ch\u1ecdn b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch g\u1eafn tr\u00ean thanh DIN t\u1eeb m\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 38 n\u0103m kinh nghi\u1ec7m s\u1ea3n xu\u1ea5t.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">Xem c\u00e1c b\u1ed9 ngu\u1ed3n g\u1eafn tr\u00ean thanh DIN <svg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"vertical-align: -3px; margin-left: 4px;\"><line x1=\"5\" y1=\"12\" x2=\"19\" y2=\"12\"\/><polyline points=\"12 5 19 12 12 19\"\/><\/svg><\/a>\n <\/div>\n\n <p><em>\u0110\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 v\u00e0 chuy\u00ean vi\u00ean mua h\u00e0ng \u0111ang \u0111\u00e1nh gi\u00e1 c\u00e1c l\u1ef1a ch\u1ecdn v\u1ec1 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch c\u00f4ng nghi\u1ec7p g\u1eafn tr\u00ean thanh DIN \u2014 v\u1edbi d\u1ea3i c\u00f4ng su\u1ea5t t\u1eeb 15 W \u0111\u1ebfn 480 W, tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n CE, CCC v\u00e0 RoHS, \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t t\u1ea1i nh\u00e0 m\u00e1y r\u1ed9ng 8.000 m\u00b2 v\u1edbi c\u00e1c d\u00e2y chuy\u1ec1n SMT ho\u00e0n to\u00e0n t\u1ef1 \u0111\u1ed9ng v\u00e0 quy tr\u00ecnh ki\u1ec3m tra l\u00e3o h\u00f3a 100% \u2014 danh m\u1ee5c s\u1ea3n ph\u1ea9m c\u1ee7a OMCH cung c\u1ea5p m\u1ed9t c\u01a1 s\u1edf tham chi\u1ebfu thi\u1ebft th\u1ef1c \u0111\u1ec3 so s\u00e1nh v\u00e0 \u0111\u00e1nh gi\u00e1 n\u0103ng l\u1ef1c c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p.<\/em><\/p>\n\n <h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n\n <ol>\n <li>Basso, Christophe. <em>Thi\u1ebft k\u1ebf v\u00f2ng \u0111i\u1ec1u khi\u1ec3n cho b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch: H\u01b0\u1edbng d\u1eabn th\u1ef1c h\u00e0nh<\/em>. Artech House, 2012.<\/li>\n <li>IEC 61204-3:2016. <em>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111i\u1ec7n \u00e1p th\u1ea5p \u2014 Ph\u1ea7n 3: T\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb (EMC)<\/em>. \u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf.<\/li>\n <li>IEC 60601-1-2:2014. <em>Thi\u1ebft b\u1ecb \u0111i\u1ec7n y t\u1ebf \u2014 Ph\u1ea7n 1-2: Y\u00eau c\u1ea7u chung v\u1ec1 an to\u00e0n c\u01a1 b\u1ea3n v\u00e0 hi\u1ec7u su\u1ea5t thi\u1ebft y\u1ebfu \u2014 Ti\u00eau chu\u1ea9n li\u00ean quan: Nhi\u1ec5u \u0111i\u1ec7n t\u1eeb<\/em>. \u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf.<\/li>\n <li>UL 508A. <em>Ti\u00eau chu\u1ea9n cho B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p<\/em>. Underwriters Laboratories.<\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/switch-mode-power-supply\/\">B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch OMCH tr\u00ean thanh DIN<\/a><\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/8000m%C2%B2-factory\/\">Nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t OMCH<\/a><\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/\">OMCH<\/a><\/li>\n <\/ol>\n <\/article>\n<\/div>\n\n<\/body><\/html>","protected":false},"excerpt":{"rendered":"<p>B\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh so v\u1edbi b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch: H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn th\u1ef1c ti\u1ec5n d\u00e0nh cho k\u1ef9 s\u01b0 Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) l\u00e0 m\u1ed9t trong nh\u1eefng quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u ti\u00ean m\u00e0 b\u1ea1n s\u1ebd ph\u1ea3i \u0111\u1ed1i m\u1eb7t khi thi\u1ebft k\u1ebf ho\u1eb7c n\u00e2ng c\u1ea5p thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p. C\u1ea3 hai \u0111\u1ec1u chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u00e0nh \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u (DC) \u1ed5n \u0111\u1ecbnh \u2014 nh\u01b0ng c\u00e1ch th\u1ee9c qu\u1ea3n l\u00fd n\u0103ng l\u01b0\u1ee3ng c\u1ee7a ch\u00fang l\u1ea1i ho\u00e0n to\u00e0n kh\u00e1c bi\u1ec7t [\u2026]<\/p>","protected":false},"author":4,"featured_media":5269,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Linear vs Switching Power Supply: A Practical Selection Guide for Engineers","_seopress_titles_desc":"Compare linear and switching power supplies (SMPS) with this practical selection guide for engineers. Learn how to balance efficiency, noise, size, and cost.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-5264","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\/5264","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=5264"}],"version-history":[{"count":5,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/5264\/revisions"}],"predecessor-version":[{"id":12028,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/5264\/revisions\/12028"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/5269"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=5264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=5264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=5264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":5264,"date":"2025-05-30T09:24:02","date_gmt":"2025-05-30T09:24:02","guid":{"rendered":"https:\/\/www.omch.com\/?p=5264"},"modified":"2026-07-15T09:12:58","modified_gmt":"2026-07-15T09:12:58","slug":"linear-vs-switching-power-supply","status":"publish","type":"post","link":"https:\/\/www.omch.com\/vi\/linear-vs-switching-power-supply\/","title":{"rendered":"Ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh so v\u1edbi ngu\u1ed3n \u0111i\u1ec7n chuy\u1ec3n m\u1ea1ch: H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn th\u1ef1c ti\u1ec5n d\u00e0nh cho c\u00e1c k\u1ef9 s\u01b0"},"content":{"rendered":"\n\n \n \n Ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh so v\u1edbi ngu\u1ed3n \u0111i\u1ec7n chuy\u1ec3n m\u1ea1ch: H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn th\u1ef1c ti\u1ec5n d\u00e0nh cho c\u00e1c k\u1ef9 s\u01b0<\/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\n \/* Palette \u2014 plan gate approved *\/\n --body-bg: #FFFFFF;\n --body-text: #333333;\n --body-text-secondary: #6E6E6E;\n --heading-ink: #000000;\n --accent: #3B89D3;\n --accent-text: #1A6BB5;\n --accent-hot: #FD9649;\n --inverse-bg: #1E1E1E;\n --inverse-text: #FFFFFF;\n --inverse-text-secondary: #B0B0B0;\n --card-fill: #F0F7FC;\n --card-border: #E0E0E0;\n --card-text: #333333;\n --card-text-secondary: #6E6E6E;\n --table-stripe: #BBCFE0;\n --border-light: #E0E0E0;\n --btn-white: #FFFFFF;\n --btn-ink: #0D3972;\n\n font-family: \"Manrope\", sans-serif;\n font-size: 16px;\n font-weight: 400;\n line-height: 1.6;\n color: var(--body-text);\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 .bp-checklist .bp-checklist-title { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 16px; color: var(--heading-ink); margin: 0 0 16px; }\n .bd-post .bp-checklist .bp-check-rows { display: flex; flex-direction: column; gap: 12px; }\n .bd-post .bp-checklist .bp-check-row { display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px; border-radius: 4px; }\n .bd-post .bp-checklist .bp-check-row svg { flex: 0 0 auto; margin-top: 1px; color: var(--accent); transition: color 0.2s ease-out; }\n .bd-post .bp-checklist .bp-check-row:hover svg { color: var(--accent-hot); }\n .bd-post .bp-checklist .bp-check-row span { font-size: 15px; color: var(--card-text); }\n\n \/* CTA End \u2014 inverse solid-fill *\/\n .bd-post .bp-cta-end { background: var(--inverse-bg); border-radius: 8px; padding: var(--pad-standard); display: flex; flex-direction: column; align-items: center; text-align: center; gap: 12px; }\n .bd-post .bp-cta-end svg { color: var(--accent); }\n .bd-post .bp-cta-end h4 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 24px; line-height: 1.25; color: var(--inverse-text); margin: 0; }\n .bd-post .bp-cta-end p { color: var(--inverse-text-secondary); margin: 0; }\n .bd-post .bp-cta-end-btn { font-family: \"Manrope\", sans-serif; font-weight: 600; font-size: 15px; padding: 12px 28px; border-radius: 6px; border: none; cursor: pointer; background: var(--accent-hot); color: var(--btn-ink); text-decoration: none; display: inline-block; transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, background 0.2s ease-out, color 0.2s ease-out; }\n .bd-post .bp-cta-end-btn:hover { background: var(--btn-white); color: var(--accent-text); }\n\n \/* 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 0.2s ease-out, transform 0.2s ease-out; }\n .bd-post h2:hover { color: var(--accent-text); transform: scale(1.01); }\n .bd-post .bp-stat-dual { transition: transform 0.2s ease-out, box-shadow 0.2s ease-out; }\n .bd-post .bp-stat-dual:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.10); }\n .bd-post .bp-card-hybrid { transition: transform 0.2s ease-out, box-shadow 0.2s ease-out; }\n .bd-post .bp-card-hybrid:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-checklist { transition: transform 0.2s ease-out, box-shadow 0.2s ease-out; }\n .bd-post .bp-checklist:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-cta-end-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 14px rgba(0,0,0,0.25); }\n .bd-post .bd-post-article a { transition: color 0.2s ease-out, text-decoration-color 0.2s ease-out; }\n }\n\n \/* Mobile *\/\n @media (max-width: 768px) {\n .bd-post { padding: 16px; }\n .bd-post h1 { font-size: 26px; }\n .bd-post h2 { font-size: 26px; margin-top: 32px; }\n .bd-post h3 { font-size: 20px; margin-top: 24px; }\n .bd-post .bp-stat-dual { flex-direction: column; gap: 16px; }\n .bd-post .bp-stat-dual .bp-stat-divider { width: 60px; height: 1px; align-self: center; }\n .bd-post .bp-stat-dual .bp-stat-number { font-size: 30px; }\n .bd-post .bp-card-hybrid { flex-direction: column; }\n .bd-post .bp-card-hybrid .bp-hybrid-icon { padding-top: 0; }\n .bd-post .bp-cta-end h4 { font-size: 20px; }\n }\n <\/style>\n <article class=\"bd-post-article\">\n <h1><\/h1>\n\n <p>Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) l\u00e0 m\u1ed9t trong nh\u1eefng quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u ti\u00ean m\u00e0 b\u1ea1n s\u1ebd ph\u1ea3i \u0111\u1ed1i m\u1eb7t khi thi\u1ebft k\u1ebf ho\u1eb7c n\u00e2ng c\u1ea5p thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p. C\u1ea3 hai lo\u1ea1i \u0111\u1ec1u chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u00e0nh \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u \u1ed5n \u0111\u1ecbnh \u2014 nh\u01b0ng c\u00e1ch th\u1ee9c qu\u1ea3n l\u00fd n\u0103ng l\u01b0\u1ee3ng c\u1ee7a ch\u00fang l\u1ea1i ho\u00e0n to\u00e0n kh\u00e1c bi\u1ec7t. V\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ecdi kh\u00eda c\u1ea1nh quan tr\u1ecdng: hi\u1ec7u su\u1ea5t, \u0111\u1ed9 \u1ed3n, k\u00edch th\u01b0\u1edbc, chi ph\u00ed v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 kh\u1ea3 n\u0103ng h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady trong th\u1ef1c t\u1ebf.<\/p>\n\n <p>H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd ph\u00e2n t\u00edch chi ti\u1ebft nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i, so s\u00e1nh tr\u1ef1c ti\u1ebfp hi\u1ec7u su\u1ea5t, ch\u1ec9 ra \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a t\u1eebng lo\u1ea1i v\u00e0 k\u1ebft th\u00fac b\u1eb1ng m\u1ed9t khung quy\u1ebft \u0111\u1ecbnh th\u1ef1c ti\u1ec5n. D\u00f9 b\u1ea1n \u0111ang l\u1eadp th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cho m\u1ed9t b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n, thay th\u1ebf ngu\u1ed3n \u0111i\u1ec7n c\u0169 hay \u0111\u00e1nh gi\u00e1 c\u00e1c nh\u00e0 cung c\u1ea5p, b\u1ea1n s\u1ebd t\u00ecm th\u1ea5y nh\u1eefng d\u1eef li\u1ec7u v\u00e0 logic ra quy\u1ebft \u0111\u1ecbnh c\u1ea7n thi\u1ebft.<\/p>\n\n <h2>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch<\/h2>\n<img decoding=\"async\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2026\/07\/Gemini_Generated_Image_cfl83lcfl83lcfl8.webp\" alt=\"M\u00f4 t\u1ea3\" class=\"bd-post-image\" loading=\"lazy\">\n\n <p>C\u1ea3 hai lo\u1ea1i ngu\u1ed3n \u0111i\u1ec7n n\u00e0y \u0111\u1ec1u c\u00f3 c\u00f9ng m\u1ee5c \u0111\u00edch c\u01a1 b\u1ea3n: nh\u1eadn \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o v\u00e0 cung c\u1ea5p \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u (DC) \u0111\u1ea7u ra \u1ed5n \u0111\u1ecbnh, kh\u00f4ng nhi\u1ec5u. \u0110i\u1ec3m kh\u00e1c bi\u1ec7t l\u00e0 <em>nh\u01b0 th\u1ebf n\u00e0o<\/em> H\u1ecd x\u1eed l\u00fd l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng d\u01b0 th\u1eeba \u0111\u00f3.<\/p>\n\n <p>A <strong>ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh<\/strong> s\u1eed d\u1ee5ng m\u1ed9t b\u00f3ng b\u00e1n d\u1eabn n\u1ed1i ti\u1ebfp ho\u1ea1t \u0111\u1ed9ng trong v\u00f9ng tuy\u1ebfn t\u00ednh (ho\u1ea1t \u0111\u1ed9ng). H\u00e3y h\u00ecnh dung n\u00f3 nh\u01b0 m\u1ed9t \u0111i\u1ec7n tr\u1edf bi\u1ebfn thi\u00ean: b\u00f3ng b\u00e1n d\u1eabn li\u00ean t\u1ee5c \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n tr\u1edf c\u1ee7a m\u00ecnh \u0111\u1ec3 duy tr\u00ec \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra \u1ed5n \u0111\u1ecbnh, v\u00e0 b\u1ea5t k\u1ef3 \u0111i\u1ec7n \u00e1p d\u01b0 th\u1eeba n\u00e0o c\u0169ng s\u1ebd b\u1ecb s\u1ee5t gi\u1ea3m qua n\u00f3 \u2014 \u0111\u01b0\u1ee3c t\u1ecfa ra d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t. M\u1ea1ch \u0111i\u1ec7n n\u00e0y r\u1ea5t \u0111\u01a1n gi\u1ea3n: m\u1ed9t bi\u1ebfn \u00e1p t\u1ea7n s\u1ed1 \u0111\u01b0\u1eddng d\u00e2y h\u1ea1 \u00e1p \u0111i\u1ec7n xoay chi\u1ec1u t\u1eeb ngu\u1ed3n \u0111i\u1ec7n l\u01b0\u1edbi, m\u1ed9t b\u1ed9 ch\u1ec9nh l\u01b0u v\u00e0 t\u1ee5 l\u1ecdc t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u ch\u01b0a \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh, v\u00e0 b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh tuy\u1ebfn t\u00ednh s\u1ebd l\u00e0m s\u1ea1ch d\u00f2ng \u0111i\u1ec7n n\u00e0y. Tuy nhi\u00ean, c\u00e1c \u0111\u1ecbnh lu\u1eadt v\u1eadt l\u00fd \u0111\u1eb7t ra m\u1ed9t gi\u1edbi h\u1ea1n c\u1ee9ng: hi\u1ec7u su\u1ea5t kh\u00f4ng bao gi\u1edd c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 Vout\/Vin \u00d7 100%. N\u1ebfu b\u1ea1n h\u1ea1 \u00e1p t\u1eeb 12 V xu\u1ed1ng 5 V, hi\u1ec7u su\u1ea5t t\u1ed1i \u0111a theo l\u00fd thuy\u1ebft ch\u1ec9 l\u00e0 42%. 58% c\u00f2n l\u1ea1i s\u1ebd bi\u1ebfn th\u00e0nh nhi\u1ec7t.<\/p>\n\n <p>A <strong>b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/strong> \u00e1p d\u1ee5ng m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ho\u00e0n to\u00e0n kh\u00e1c bi\u1ec7t. Thay v\u00ec l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng d\u01b0 th\u1eeba, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1eed d\u1ee5ng b\u00f3ng b\u00e1n d\u1eabn l\u00e0m c\u00f4ng t\u1eafc t\u1ed1c \u0111\u1ed9 cao \u2014 \u1edf tr\u1ea1ng th\u00e1i B\u1eacT ho\u00e0n to\u00e0n ho\u1eb7c T\u1eaeT ho\u00e0n to\u00e0n, th\u01b0\u1eddng \u1edf t\u1ea7n s\u1ed1 t\u1eeb 50 kHz \u0111\u1ebfn 150 kHz trong c\u00e1c thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p. B\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung (PWM) \u0111i\u1ec1u ch\u1ec9nh chu k\u1ef3 l\u00e0m vi\u1ec7c: trong giai \u0111o\u1ea1n B\u1eacT, n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u00edch tr\u1eef trong cu\u1ed9n c\u1ea3m ho\u1eb7c m\u00e1y bi\u1ebfn \u00e1p; trong giai \u0111o\u1ea1n T\u1eaeT, n\u0103ng l\u01b0\u1ee3ng \u0111\u00e3 t\u00edch tr\u1eef \u0111\u00f3 \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng ra \u0111\u1ea7u ra. V\u00ec c\u00f4ng t\u1eafc ho\u1eb7c l\u00e0 d\u1eabn \u0111i\u1ec7n ho\u00e0n to\u00e0n (s\u1ee5t \u00e1p g\u1ea7n b\u1eb1ng kh\u00f4ng) ho\u1eb7c l\u00e0 ch\u1eb7n ho\u00e0n to\u00e0n (d\u00f2ng \u0111i\u1ec7n g\u1ea7n b\u1eb1ng kh\u00f4ng), n\u00ean s\u1ef1 ti\u00eau hao c\u00f4ng su\u1ea5t gi\u1ea3m \u0111\u00e1ng k\u1ec3. Hi\u1ec7u su\u1ea5t 85\u201395% l\u00e0 m\u1ee9c th\u00f4ng th\u01b0\u1eddng. C\u00e1c thi\u1ebft k\u1ebf ch\u1ec9nh l\u01b0u \u0111\u1ed3ng b\u1ed9 hi\u1ec7n \u0111\u1ea1i c\u00f2n v\u01b0\u1ee3t xa m\u1ee9c 95%.<\/p>\n\n <p>S\u1ef1 \u0111\u00e1nh \u0111\u1ed5i n\u00e0y \u0111\u00e3 r\u00f5 r\u00e0ng: s\u1ef1 \u0111\u01a1n gi\u1ea3n v\u00e0 y\u00ean t\u0129nh so v\u1edbi hi\u1ec7u qu\u1ea3 v\u00e0 s\u1ef1 ph\u1ee9c t\u1ea1p. Ph\u1ea7n ti\u1ebfp theo s\u1ebd \u0111\u01b0a ra nh\u1eefng con s\u1ed1 c\u1ee5 th\u1ec3 \u0111\u1ec3 minh ch\u1ee9ng cho nh\u1eadn \u0111\u1ecbnh \u0111\u00f3.<\/p>\n\n <h2>So s\u00e1nh tr\u1ef1c ti\u1ebfp: Hi\u1ec7u su\u1ea5t, \u0111\u1ed9 \u1ed3n, k\u00edch th\u01b0\u1edbc v\u00e0 chi ph\u00ed<\/h2>\n\n <p>Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 m\u1ed9t s\u1ef1 c\u00e2n nh\u1eafc gi\u1eefa b\u1ed1n y\u1ebfu t\u1ed1. Kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac n\u00e0o \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u1ea3 b\u1ed1n y\u1ebfu t\u1ed1 n\u00e0y \u2014 c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang ph\u1ee5 thu\u1ed9c v\u00e0o y\u1ebfu t\u1ed1 n\u00e0o l\u00e0 quan tr\u1ecdng nh\u1ea5t \u0111\u1ed1i v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n.<\/p>\n\n <div class=\"table-wrapper\">\n <table>\n <thead><tr><th>K\u00edch th\u01b0\u1edbc<\/th><th>B\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh<\/th><th>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/th><th>\u0110i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Hi\u1ec7u qu\u1ea3<\/td><td>T\u1eeb ba m\u01b0\u01a1i ngh\u00ecn \u0111\u1ebfn s\u00e1u m\u01b0\u01a1i m\u1ed1t ngh\u00ecn, ba tr\u0103m ba m\u01b0\u01a1i ba<\/td><td>T\u1eeb b\u1ea3y m\u01b0\u01a1i ngh\u00ecn \u0111\u1ebfn ch\u00edn m\u01b0\u01a1i l\u0103m ngh\u00ecn ba pence<\/td><td>SMPS chi\u1ebfm \u01b0u th\u1ebf \u1edf m\u1ee9c c\u00f4ng su\u1ea5t tr\u00ean 10W<\/td><\/tr>\n <tr><td>Ti\u1ebfng \u1ed3n \u0111\u1ea7u ra\/Dao \u0111\u1ed9ng<\/td><td><1 mV RMS (gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh)<\/td><td>10\u201350 mV RMS (gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh)<\/td><td>Linear ho\u1ea1t \u0111\u1ed9ng \u00eam h\u01a1n t\u1eeb 10 \u0111\u1ebfn 50 l\u1ea7n<\/td><\/tr>\n <tr><td>K\u00edch th\u01b0\u1edbc v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng<\/td><td>Lo\u1ea1i l\u1edbn (bi\u1ebfn \u00e1p 50\/60 Hz)<\/td><td>kho\u1ea3ng 1\/4 k\u00edch th\u01b0\u1edbc<\/td><td>SMPS v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 m\u1eadt \u0111\u1ed9 c\u00f4ng su\u1ea5t<\/td><\/tr>\n <tr><td>Ph\u1ea3n \u1ee9ng tho\u00e1ng qua<\/td><td>C\u1ed1 \u0111\u1ecbnh (50\u2013100 \u00b5s)<\/td><td>Ch\u1eadm h\u01a1n (~300 \u00b5s)<\/td><td>H\u1ec7 th\u1ed1ng tuy\u1ebfn t\u00ednh ph\u1ea3n \u1ee9ng nhanh h\u01a1n v\u1edbi c\u00e1c b\u01b0\u1edbc t\u1ea3i<\/td><\/tr>\n <tr><td>T\u1ea3n nhi\u1ec7t<\/td><td>Cao \u2014 c\u1ea7n c\u00f3 b\u1ed9 t\u1ea3n nhi\u1ec7t<\/td><td>Th\u1ea5p \u2014 ch\u1ec9 c\u1ea7n l\u00e0m m\u00e1t t\u1ed1i thi\u1ec3u<\/td><td>SMPS ho\u1ea1t \u0111\u1ed9ng m\u00e1t h\u01a1n<\/td><\/tr>\n <tr><td>Chi ph\u00ed khi c\u00f4ng su\u1ea5t d\u01b0\u1edbi 50 W<\/td><td>Gi\u1ea3m chi ph\u00ed danh m\u1ee5c v\u1eadt li\u1ec7u (BOM)<\/td><td>S\u1ed1 l\u01b0\u1ee3ng linh ki\u1ec7n nhi\u1ec1u h\u01a1n<\/td><td>\u0110\u1ed9 tuy\u1ebfn t\u00ednh th\u1ea5p h\u01a1n \u1edf m\u1ee9c c\u00f4ng su\u1ea5t th\u1ea5p<\/td><\/tr>\n <tr><td>Chi ph\u00ed khi c\u00f4ng su\u1ea5t >100 W<\/td><td>Cao h\u01a1n (bi\u1ebfn \u00e1p + b\u1ed9 t\u1ea3n nhi\u1ec7t)<\/td><td>Gi\u1ea3m chi ph\u00ed khi m\u1edf r\u1ed9ng quy m\u00f4<\/td><td>SMPS c\u00f3 gi\u00e1 r\u1ebb h\u01a1n khi c\u00f4ng su\u1ea5t cao h\u01a1n<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <h3>Hi\u1ec7u qu\u1ea3 v\u00e0 Nhi\u1ec7t: T\u1ea1i sao vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i l\u1ea1i l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 chi\u1ebfn th\u1eafng trong cu\u1ed9c \u0111ua n\u0103ng l\u01b0\u1ee3ng<\/h3>\n\n <p>Kho\u1ea3ng c\u00e1ch v\u1ec1 hi\u1ec7u su\u1ea5t ch\u00ednh l\u00e0 y\u1ebfu t\u1ed1 ph\u00e2n bi\u1ec7t quan tr\u1ecdng nh\u1ea5t. Hi\u1ec7u su\u1ea5t c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ef7 l\u1ec7 gi\u1eefa \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o v\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra: ch\u00eanh l\u1ec7ch \u0111i\u1ec7n \u00e1p c\u00e0ng l\u1edbn, l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng b\u1ecb l\u00e3ng ph\u00ed d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t c\u00e0ng nhi\u1ec1u.<\/p>\n\n \n <div class=\"bp-stat-dual bd-reveal\">\n <div class=\"bp-stat-item\">\n <div class=\"bp-stat-number\">38W<\/div>\n <div class=\"bp-stat-label\">B\u1ecb th\u1ea5t tho\u00e1t d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t (tuy\u1ebfn t\u00ednh)<\/div>\n <\/div>\n <div class=\"bp-stat-divider\"><\/div>\n <div class=\"bp-stat-item\">\n <div class=\"bp-stat-number\">1,5 W<\/div>\n <div class=\"bp-stat-label\">B\u1ecb th\u1ea5t tho\u00e1t d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t (SMPS)<\/div>\n <\/div>\n <\/div>\n\n <p>\u1ede c\u1ea5p \u0111\u1ed9 h\u1ec7 th\u1ed1ng, con s\u1ed1 n\u00e0y t\u0103ng l\u00ean r\u1ea5t nhanh. M\u1ed9t t\u1ea3i 100 W ho\u1ea1t \u0111\u1ed9ng 24\/7 v\u1edbi b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh c\u00f3 hi\u1ec7u su\u1ea5t 50% s\u1ebd ti\u00eau th\u1ee5 th\u00eam 307 kWh m\u1ed7i n\u0103m so v\u1edbi b\u1ed9 ngu\u1ed3n SMPS c\u00f3 hi\u1ec7u su\u1ea5t 85%. V\u1edbi m\u1ee9c gi\u00e1 \u0111i\u1ec7n c\u00f4ng nghi\u1ec7p, con s\u1ed1 n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng $30\u201350 m\u1ed7i n\u0103m cho m\u1ed7i b\u1ed9 ngu\u1ed3n \u2014 m\u1ed9t con s\u1ed1 \u0111\u00e1ng k\u1ec3 khi b\u1ea1n c\u00f3 h\u00e0ng ch\u1ee5c b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n trong nh\u00e0 m\u00e1y.<\/p>\n\n <h3>Ti\u1ebfng \u1ed3n, dao \u0111\u1ed9ng v\u00e0 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI): T\u1ea1i sao m\u1ea1ch tuy\u1ebfn t\u00ednh v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c v\u1ecb tr\u00ed quan tr\u1ecdng<\/h3>\n\n <p>\u0110\u00e2y l\u00e0 l\u0129nh v\u1ef1c duy nh\u1ea5t m\u00e0 c\u00e1c ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh v\u1eabn kh\u00f4ng th\u1ec3 thay th\u1ebf. M\u1ed9t b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) t\u1ea1o ra nhi\u1ec5u t\u1eeb c\u00e1c c\u1ea1nh chuy\u1ec3n m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao: c\u00e1c gi\u00e1 tr\u1ecb di\/dt v\u00e0 dv\/dt t\u0103ng nhanh g\u00e2y ra dao \u0111\u1ed9ng d\u1eabn tr\u00ean \u0111\u1ea7u ra (th\u01b0\u1eddng l\u00e0 10\u201350 mV RMS) v\u00e0 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb b\u1ee9c x\u1ea1 (EMI) c\u00f3 th\u1ec3 x\u00e2m nh\u1eadp v\u00e0o c\u00e1c m\u1ea1ch nh\u1ea1y c\u1ea3m l\u00e2n c\u1eadn. C\u00e1c s\u00f3ng h\u00e0i c\u1ee7a t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch c\u00f3 th\u1ec3 l\u00ean \u0111\u1ebfn h\u00e0ng ch\u1ee5c MHz.<\/p>\n\n <p>Ng\u01b0\u1ee3c l\u1ea1i, ngu\u1ed3n tuy\u1ebfn t\u00ednh kh\u00f4ng c\u00f3 ho\u1ea1t \u0111\u1ed9ng chuy\u1ec3n m\u1ea1ch. \u0110\u1ed9 g\u1ee3n s\u00f3ng \u0111\u1ea7u ra c\u1ee7a n\u00f3 th\u01b0\u1eddng d\u01b0\u1edbi 1 mV RMS. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y c\u00f3 \u00fd ngh\u0129a \u2014 nh\u01b0 b\u1ed9 ti\u1ec1n khu\u1ebfch \u0111\u1ea1i \u00e2m thanh nh\u1eafm \u0111\u1ebfn t\u1ef7 l\u1ec7 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u (SNR) >100 dB, b\u1ed9 thu s\u00f3ng RF thu t\u00edn hi\u1ec7u \u1edf m\u1ee9c -120 dBm, ho\u1eb7c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u01b0\u01a1ng t\u1ef1-s\u1ed1 (ADC) ch\u00ednh x\u00e1c \u0111o microvolt \u2014 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u1eabn l\u00e0 l\u1ef1a ch\u1ecdn duy nh\u1ea5t hi\u1ec7n nay.<\/p>\n\n <p>M\u1ed9t gi\u1ea3i ph\u00e1p th\u1ecfa hi\u1ec7p th\u1ef1c t\u1ebf m\u00e0 nhi\u1ec1u k\u1ef9 s\u01b0 th\u01b0\u1eddng \u00e1p d\u1ee5ng: \u0111\u1eb7t m\u1ed9t b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh tuy\u1ebfn t\u00ednh c\u00f3 \u0111\u1ed9 s\u1ee5t \u00e1p th\u1ea5p (LDO) sau b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS). B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) \u0111\u1ea3m nh\u1eadn vi\u1ec7c h\u1ea1 \u00e1p ch\u00ednh v\u1edbi hi\u1ec7u su\u1ea5t cao, trong khi b\u1ed9 LDO l\u00e0m gi\u1ea3m nhi\u1ec5u d\u01b0 t\u1eeb 60\u201380 dB \u1edf d\u1ea3i t\u1ea7n s\u1ed1 th\u1ea5p. B\u1ea1n s\u1ebd ph\u1ea3i \u0111\u00e1nh \u0111\u1ed5i hi\u1ec7u su\u1ea5t t\u1eeb 5\u201310% \u0111\u1ec3 \u0111\u1ed5i l\u1ea5y t\u00edn hi\u1ec7u \u0111\u1ea7u ra s\u1ea1ch h\u01a1n \u0111\u00e1ng k\u1ec3.<\/p>\n\n <h3>K\u00edch th\u01b0\u1edbc v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng: V\u1eadt l\u00fd t\u1eeb t\u00ednh<\/h3>\n\n <p>S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 k\u00edch th\u01b0\u1edbc ch\u1ee7 y\u1ebfu xu\u1ea5t ph\u00e1t t\u1eeb m\u1ed9t th\u00e0nh ph\u1ea7n: b\u1ed9 bi\u1ebfn \u00e1p. B\u1ed9 bi\u1ebfn \u00e1p c\u1ee7a b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 l\u01b0\u1edbi \u0111i\u1ec7n 50 ho\u1eb7c 60 Hz, do \u0111\u00f3 c\u1ea7n m\u1ed9t l\u00f5i s\u1eaft l\u1edbn \u0111\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng b\u00e3o h\u00f2a. M\u1ed9t b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh c\u00f4ng su\u1ea5t 100 W c\u00f3 th\u1ec3 n\u1eb7ng t\u1eeb 2\u20135 kg.<\/p>\n\n <p>M\u1ed9t cu\u1ed9n d\u00e2y bi\u1ebfn \u00e1p SMPS chuy\u1ec3n m\u1ea1ch \u1edf t\u1ea7n s\u1ed1 50\u2013150 kHz \u2014 nhanh h\u01a1n kho\u1ea3ng 1.000 l\u1ea7n. Do t\u1eeb th\u00f4ng tr\u00ean m\u1ed7i chu k\u1ef3 t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi t\u1ea7n s\u1ed1, n\u00ean di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang c\u1ee7a l\u00f5i gi\u1ea3m \u0111i kho\u1ea3ng 30 l\u1ea7n. M\u1ed9t b\u1ed9 ngu\u1ed3n SMPS c\u00f4ng su\u1ea5t 240 W v\u1eeba v\u1eb7n trong l\u00f2ng b\u00e0n tay; trong khi \u0111\u00f3, b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng l\u1ea1i c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng m\u1ed9t cu\u1ed1n t\u1eeb \u0111i\u1ec3n d\u00e0y.<\/p>\n\n <p>\u0110\u1ed1i v\u1edbi c\u00e1c t\u1ee7 \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p, \u0111i\u1ec1u n\u00e0y c\u00f3 \u00fd ngh\u0129a c\u1ee5 th\u1ec3 nh\u01b0 sau: c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111\u1ee7 nh\u1eb9 \u0111\u1ec3 l\u1eafp \u0111\u1eb7t tr\u00ean thanh DIN. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh, tr\u1eeb nh\u1eefng lo\u1ea1i c\u00f3 c\u00f4ng su\u1ea5t nh\u1ecf nh\u1ea5t, th\u00ec kh\u00f4ng.<\/p>\n\n <h3>Chi ph\u00ed v\u00e0 m\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p: Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ee9c gi\u00e1<\/h3>\n\n <p>\u1ede m\u1ee9c c\u00f4ng su\u1ea5t d\u01b0\u1edbi kho\u1ea3ng 50 W, danh m\u1ee5c linh ki\u1ec7n c\u1ee7a b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 r\u1ebb h\u01a1n: ch\u1ec9 c\u1ea7n m\u1ed9t bi\u1ebfn \u00e1p, c\u1ea7u ch\u1ec9nh l\u01b0u, t\u1ee5 l\u1ecdc v\u00e0 m\u1ed9t IC \u0111i\u1ec1u ch\u1ec9nh nh\u01b0 LM7805 ($0.15\u20130.50) l\u00e0 \u0111\u1ee7 \u0111\u1ec3 ho\u00e0n th\u00e0nh nhi\u1ec7m v\u1ee5. Khi v\u01b0\u1ee3t qua ng\u01b0\u1ee1ng chuy\u1ec3n ti\u1ebfp 50\u201375 W, chi ph\u00ed cho bi\u1ebfn \u00e1p v\u00e0 t\u1ea3n nhi\u1ec7t c\u1ee7a b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh s\u1ebd t\u0103ng v\u1ecdt. B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS), m\u1eb7c d\u00f9 c\u00f3 s\u1ed1 l\u01b0\u1ee3ng linh ki\u1ec7n nhi\u1ec1u h\u01a1n nh\u01b0ng s\u1eed d\u1ee5ng c\u00e1c linh ki\u1ec7n t\u1eeb t\u00ednh nh\u1ecf h\u01a1n, tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn kinh t\u1ebf h\u01a1n.<\/p>\n\n <p>Tuy nhi\u00ean, chi ph\u00ed \u0111\u01a1n v\u1ecb kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 duy nh\u1ea5t c\u1ea7n xem x\u00e9t. N\u1ebfu t\u00ednh \u0111\u1ebfn l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c v\u00e0 nhu c\u1ea7u l\u00e0m m\u00e1t gi\u1ea3m b\u1edbt trong su\u1ed1t v\u00f2ng \u0111\u1eddi s\u1eed d\u1ee5ng t\u1eeb 5 \u0111\u1ebfn 10 n\u0103m, th\u00ec b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) th\u01b0\u1eddng c\u00f3 l\u1ee3i th\u1ebf h\u01a1n v\u1ec1 t\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu ngay c\u1ea3 \u1edf m\u1ee9c c\u00f4ng su\u1ea5t trung b\u00ecnh \u2014 \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c.<\/p>\n\n <h2>L\u0129nh v\u1ef1c m\u00e0 t\u1eebng lo\u1ea1i ph\u00e1t huy th\u1ebf m\u1ea1nh: H\u01b0\u1edbng d\u1eabn \u1ee9ng d\u1ee5ng trong th\u1ef1c t\u1ebf<\/h2>\n\n <p>Ba c\u00e2u h\u1ecfi gi\u00fap b\u1ea1n x\u00e1c \u0111\u1ecbnh h\u01b0\u1edbng \u0111i tr\u01b0\u1edbc khi l\u1ef1a ch\u1ecdn c\u1ea5u tr\u00fac m\u1ea1ng ph\u00f9 h\u1ee3p v\u1edbi m\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3:<\/p>\n\n <ol>\n <li><strong>T\u1ea3i c\u1ee7a t\u00f4i nh\u1ea1y c\u1ea3m v\u1edbi ti\u1ebfng \u1ed3n \u0111\u1ebfn m\u1ee9c n\u00e0o?<\/strong> N\u1ebfu m\u1ea1ch c\u1ee7a b\u1ea1n \u0111o \u0111\u01a1n v\u1ecb microvolt ho\u1eb7c khu\u1ebfch \u0111\u1ea1i \u00e2m thanh, h\u00e3y \u01b0u ti\u00ean ch\u1ecdn lo\u1ea1i tuy\u1ebfn t\u00ednh.<\/li>\n <li><strong>M\u1ee9c c\u00f4ng su\u1ea5t v\u00e0 dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef c\u1ee7a t\u00f4i l\u00e0 bao nhi\u00eau?<\/strong> Khi c\u00f4ng su\u1ea5t v\u01b0\u1ee3t qu\u00e1 50 W ho\u1eb7c trong m\u00f4i tr\u01b0\u1eddng k\u00edn, SMPS s\u1ebd tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh.<\/li>\n <li><strong>T\u00f4i c\u00f3 c\u1ea7n b\u1ed9 t\u0103ng \u00e1p, nhi\u1ec1u \u0111\u1ea7u ra hay c\u00e1ch ly \u0111i\u1ec7n kh\u00f4ng?<\/strong> N\u1ebfu \u0111\u00fang, b\u1ea1n c\u1ea7n m\u1ed9t c\u1ea5u tr\u00fac chuy\u1ec3n m\u1ea1ch. C\u00e1c b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh ch\u1ec9 c\u00f3 th\u1ec3 h\u1ea1 \u00e1p.<\/li>\n <\/ol>\n\n <h3>Khi ph\u01b0\u01a1ng ph\u00e1p tuy\u1ebfn t\u00ednh l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p<\/h3>\n\n <p>Ng\u00e0y nay, b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh ch\u1ec9 chi\u1ebfm m\u1ed9t th\u1ecb tr\u01b0\u1eddng ng\u00e1ch, nh\u01b0ng trong th\u1ecb tr\u01b0\u1eddng ng\u00e1ch \u0111\u00f3, ch\u00fang l\u00e0 l\u1ef1a ch\u1ecdn kh\u00f4ng th\u1ec3 thay th\u1ebf:<\/p>\n\n <ul>\n <li><strong>Thi\u1ebft b\u1ecb ph\u00f2ng th\u00ed nghi\u1ec7m v\u00e0 thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m<\/strong>: M\u00e1y hi\u1ec7n s\u00f3ng, m\u00e1y ph\u00e2n t\u00edch ph\u1ed5 v\u00e0 m\u00e1y t\u1ea1o t\u00edn hi\u1ec7u c\u1ea7n c\u00f3 m\u1ee9c nhi\u1ec5u n\u1ec1n \u0111\u1ee7 th\u1ea5p \u0111\u1ec3 ngu\u1ed3n \u0111i\u1ec7n kh\u00f4ng che l\u1ea5p t\u00edn hi\u1ec7u m\u00e0 b\u1ea1n \u0111ang c\u1ed1 g\u1eafng \u0111o.<\/li>\n <li><strong>Thi\u1ebft b\u1ecb y t\u1ebf<\/strong>: C\u00e1c m\u00e1y \u0111o \u0111i\u1ec7n t\u00e2m \u0111\u1ed3 (ECG) v\u00e0 \u0111i\u1ec7n n\u00e3o \u0111\u1ed3 (EEG), m\u00e1y theo d\u00f5i b\u1ec7nh nh\u00e2n v\u00e0 thi\u1ebft b\u1ecb ph\u1eabu thu\u1eadt ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb (EMC) theo ti\u00eau chu\u1ea9n IEC 60601-1-2. M\u1ee9c ph\u00e1t x\u1ea1 \u0111i\u1ec7n t\u1eeb (EMI) th\u1ea5p t\u1eeb ngu\u1ed3n \u0111i\u1ec7n l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 tu\u00e2n th\u1ee7, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 li\u00ean quan \u0111\u1ebfn hi\u1ec7u su\u1ea5t.<\/li>\n <li><strong>\u00c2m thanh ch\u1ea5t l\u01b0\u1ee3ng cao<\/strong>: C\u00e1c b\u1ed9 ti\u1ec1n khu\u1ebfch \u0111\u1ea1i, b\u1ed9 khu\u1ebfch \u0111\u1ea1i phono v\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i s\u1ed1 sang analog (DAC) s\u1ebd khu\u1ebfch \u0111\u1ea1i m\u1ecdi nhi\u1ec5u t\u1eeb ngu\u1ed3n \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp v\u00e0o chu\u1ed7i t\u00edn hi\u1ec7u. \u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng nh\u1eafm \u0111\u1ebfn t\u1ef7 l\u1ec7 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u (SNR) tr\u00ean 100 dB, \u0111\u1ed9 g\u1ee3n c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n d\u01b0\u1edbi 500 \u00b5V RMS l\u00e0 ti\u00eau chu\u1ea9n t\u1ed1i thi\u1ec3u.<\/li>\n <li><strong>Thi\u1ebft b\u1ecb t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RF) v\u00e0 thi\u1ebft b\u1ecb kh\u00f4ng d\u00e2y<\/strong>: C\u00e1c m\u1ea1ch ti\u1ec1n khu\u1ebfch \u0111\u1ea1i c\u1ee7a b\u1ed9 thu ho\u1ea1t \u0111\u1ed9ng \u1edf \u0111\u1ed9 nh\u1ea1y -120 dBm kh\u00f4ng th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c c\u00e1c s\u00f3ng h\u00e0i do qu\u00e1 tr\u00ecnh chuy\u1ec3n m\u1ea1ch t\u1eeb \u0111\u01b0\u1eddng ngu\u1ed3n g\u00e2y ra.<\/li>\n <\/ul>\n\n <h3>Khi s\u1ef1 chuy\u1ec3n \u0111\u1ed5i chi\u1ebfm \u01b0u th\u1ebf<\/h3>\n\n <p>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch l\u00e0 l\u1ef1a ch\u1ecdn m\u1eb7c \u0111\u1ecbnh trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i, v\u00e0 \u0111i\u1ec1u n\u00e0y ho\u00e0n to\u00e0n c\u00f3 l\u00fd do ch\u00ednh \u0111\u00e1ng:<\/p>\n\n <ul>\n <li><strong>T\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p<\/strong>: C\u00e1c b\u1ed9 ngu\u1ed3n 24 VDC g\u1eafn tr\u00ean thanh DIN d\u00f9ng \u0111\u1ec3 c\u1ea5p ngu\u1ed3n cho PLC, c\u1ea3m bi\u1ebfn v\u00e0 c\u00e1c m\u00f4-\u0111un I\/O h\u1ea7u h\u1ebft \u0111\u1ec1u l\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS). Ch\u00fang h\u1ed7 tr\u1ee3 \u0111\u1ea7u v\u00e0o AC \u0111a d\u1ea3i (85\u2013264 VAC, 50\/60 Hz), ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n c\u1ee7a thanh DIN v\u00e0 cung c\u1ea5p c\u00f4ng su\u1ea5t t\u1eeb 15 W \u0111\u1ebfn 960 W trong m\u1ed9t thi\u1ebft k\u1ebf nh\u1ecf g\u1ecdn. \u0110\u1ed1i v\u1edbi c\u00e1c t\u1ee7 \u0111i\u1ec1u khi\u1ec3n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo ti\u00eau chu\u1ea9n UL 508A, b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch l\u00e0 ti\u00eau chu\u1ea9n th\u1ef1c ti\u1ec5n \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng.<\/li>\n <li><strong>H\u1ec7 th\u1ed1ng c\u00f4ng su\u1ea5t cao<\/strong>: C\u00e1c gi\u00e1 \u0111\u1eb7t m\u00e1y ch\u1ee7 (hi\u1ec7u su\u1ea5t 80 PLUS Titanium \u1edf model 96%), tr\u1ea1m ph\u00e1t s\u00f3ng vi\u1ec5n th\u00f4ng, h\u1ea1 t\u1ea7ng s\u1ea1c xe \u0111i\u1ec7n v\u00e0 c\u00e1c quy tr\u00ecnh c\u00f4ng nghi\u1ec7p nh\u01b0 m\u1ea1 \u0111i\u1ec7n \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c c\u00f4ng su\u1ea5t m\u00e0 c\u00e1c b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh \u0111\u01a1n thu\u1ea7n kh\u00f4ng th\u1ec3 \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c.<\/li>\n <li><strong>C\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng v\u00e0 ch\u1ea1y b\u1eb1ng pin<\/strong>: M\u1ecdi b\u1ed9 s\u1ea1c \u0111i\u1ec7n tho\u1ea1i, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n cho m\u00e1y t\u00ednh x\u00e1ch tay v\u00e0 thi\u1ebft b\u1ecb c\u1ea7m tay \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a th\u1eddi l\u01b0\u1ee3ng s\u1eed d\u1ee5ng v\u00e0 gi\u1ea3m thi\u1ec3u l\u01b0\u1ee3ng nhi\u1ec7t t\u1ecfa ra.<\/li>\n <li><strong>C\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n \u00e1p linh ho\u1ea1t<\/strong>: C\u00e1c c\u1ea5u tr\u00fac m\u1ea1ch Boost, buck-boost, flyback, forward v\u00e0 c\u00e1ch ly \u0111\u1ec1u l\u00e0 c\u00e1c m\u1ea1ch chuy\u1ec3n m\u1ea1ch thu\u1ea7n t\u00fay. C\u00e1c ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf chuy\u1ec3n \u0111\u1ed5i h\u1ea1 \u00e1p (buck).<\/li>\n <\/ul>\n\n <h3>Ph\u01b0\u01a1ng ph\u00e1p k\u1ebft h\u1ee3p: \u0110\u1ea3m b\u1ea3o c\u1ea3 hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ed9 \u1ed3n th\u1ea5p<\/h3>\n\n <p>M\u1ed9t chi\u1ebfn l\u01b0\u1ee3c \u0111\u00e1ng \u0111\u01b0\u1ee3c quan t\u00e2m h\u01a1n: s\u1eed d\u1ee5ng b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh chuy\u1ec3n m\u1ea1ch (SMPS) cho giai \u0111o\u1ea1n h\u1ea1 \u00e1p ch\u00ednh c\u00f3 hi\u1ec7u su\u1ea5t cao, sau \u0111\u00f3 d\u00f9ng b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p LDO \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh ti\u1ebfp tr\u00ean c\u00e1c \u0111\u01b0\u1eddng ngu\u1ed3n nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec5u. \u0110\u1ed1i v\u1edbi m\u1ed9t bo m\u1ea1ch t\u00edn hi\u1ec7u h\u1ed7n h\u1ee3p, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 MCU v\u00e0 m\u1ea1ch logic s\u1ed1 \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n tr\u1ef1c ti\u1ebfp t\u1eeb b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS), trong khi c\u00e1c \u0111\u01b0\u1eddng ngu\u1ed3n c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u01b0\u01a1ng t\u1ef1-s\u1ed1 (ADC) v\u00e0 b\u1ed9 khu\u1ebfch \u0111\u1ea1i v\u1eadn h\u00e0nh (op-amp) \u0111i qua b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p LDO. Hi\u1ec7u su\u1ea5t t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng hi\u1ec7u su\u1ea5t c\u1ee7a SMPS nh\u00e2n v\u1edbi (Vout_LDO \/ Vin_LDO) \u2014 th\u01b0\u1eddng \u0111\u1ea1t 80\u201390% t\u1ed5ng th\u1ec3, v\u1edbi nhi\u1ec5u \u0111\u1ea7u ra d\u01b0\u1edbi 1 mV RMS.<\/p>\n\n <p>M\u1ed9t chi ti\u1ebft tri\u1ec3n khai \u0111\u00e1ng ch\u00fa \u00fd: kh\u1ea3 n\u0103ng kh\u1eed nhi\u1ec5u ngu\u1ed3n (PSRR) c\u1ee7a b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p tuy\u1ebfn t\u00ednh (LDO) gi\u1ea3m d\u1ea7n \u1edf c\u00e1c t\u1ea7n s\u1ed1 cao h\u01a1n, th\u01b0\u1eddng gi\u1ea3m t\u1eeb 60\u201380 dB \u1edf 120 Hz xu\u1ed1ng c\u00f2n 20\u201330 dB \u1edf t\u1ea7n s\u1ed1 tr\u00ean 100 kHz. \u0110\u1ec3 b\u00f9 \u0111\u1eafp, b\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn m\u1ed9t b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) c\u00f3 t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch th\u1ea5p h\u01a1n (<100 kHz) ho\u1eb7c th\u00eam m\u1ed9t b\u1ed9 l\u1ecdc LC gi\u1eefa \u0111\u1ea7u ra c\u1ee7a SMPS v\u00e0 \u0111\u1ea7u v\u00e0o c\u1ee7a LDO, v\u1edbi t\u1ea7n s\u1ed1 c\u1eaft \u0111\u01b0\u1ee3c \u0111\u1eb7t kho\u1ea3ng b\u1eb1ng m\u1ed9t ph\u1ea7n m\u01b0\u1eddi t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch.<\/p>\n\n \n <div class=\"bp-card-hybrid bd-reveal\">\n <div class=\"bp-hybrid-icon\">\n <svg width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect x=\"4\" y=\"4\" width=\"16\" height=\"16\" rx=\"2\" ry=\"2\"\/><rect x=\"9\" y=\"9\" width=\"6\" height=\"6\"\/><line x1=\"9\" y1=\"1\" x2=\"9\" y2=\"4\"\/><line x1=\"15\" y1=\"1\" x2=\"15\" y2=\"4\"\/><line x1=\"9\" y1=\"20\" x2=\"9\" y2=\"23\"\/><line x1=\"15\" y1=\"20\" x2=\"15\" y2=\"23\"\/><line x1=\"20\" y1=\"9\" x2=\"23\" y2=\"9\"\/><line x1=\"20\" y1=\"14\" x2=\"23\" y2=\"14\"\/><line x1=\"1\" y1=\"9\" x2=\"4\" y2=\"9\"\/><line x1=\"1\" y1=\"14\" x2=\"4\" y2=\"14\"\/><\/svg>\n <\/div>\n <div class=\"bp-hybrid-body\">\n <h4>\u0110i\u1ec3m t\u1ed1i \u01b0u c\u1ee7a c\u00f4ng ngh\u1ec7 lai<\/h4>\n <p>M\u1ed9t b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) \u0111\u1ea3m nh\u1eadn vi\u1ec7c h\u1ea1 \u00e1p ch\u00ednh v\u1edbi hi\u1ec7u su\u1ea5t t\u1eeb 85\u201395%. M\u1ed9t b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p tuy\u1ebfn t\u00ednh (LDO) l\u00e0m s\u1ea1ch t\u00edn hi\u1ec7u \u0111\u1ea7u ra xu\u1ed1ng m\u1ee9c nhi\u1ec5u RMS <1 mV. B\u1ea1n s\u1ebd ph\u1ea3i \u0111\u00e1nh \u0111\u1ed5i hi\u1ec7u su\u1ea5t t\u1eeb 5\u201310% \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c ngu\u1ed3n \u0111i\u1ec7n \u0111\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c cao \u2014 c\u00f9ng ki\u1ebfn tr\u00fac \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong thi\u1ebft k\u1ebf PCB t\u00edn hi\u1ec7u h\u1ed7n h\u1ee3p.<\/p>\n <div class=\"bp-hybrid-badges\">\n <span class=\"bp-badge\">K\u1ef9 thu\u1eadt s\u1ed1 + T\u01b0\u01a1ng t\u1ef1<\/span>\n <span class=\"bp-badge\">H\u1ec7 th\u1ed1ng RF<\/span>\n <span class=\"bp-badge\">B\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u01b0\u01a1ng t\u1ef1-s\u1ed1 (ADC) ch\u00ednh x\u00e1c<\/span>\n <\/div>\n <\/div>\n <\/div>\n\n <h2>V\u01b0\u1ee3t ra ngo\u00e0i b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt: L\u1ef1a ch\u1ecdn nh\u00e0 cung c\u1ea5p b\u1ed9 ngu\u1ed3n<\/h2>\n\n <p>Vi\u1ec7c l\u1ef1a ch\u1ecdn c\u1ea5u tr\u00fac m\u1ea1ng ph\u00f9 h\u1ee3p ch\u1ec9 l\u00e0 m\u1ed9t n\u1eeda c\u1ee7a v\u1ea5n \u0111\u1ec1. Hai b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt tr\u00ean gi\u1ea5y t\u1edd gi\u1ed1ng h\u1ec7t nhau c\u00f3 th\u1ec3 mang l\u1ea1i \u0111\u1ed9 tin c\u1eady ho\u00e0n to\u00e0n kh\u00e1c nhau khi v\u1eadn h\u00e0nh th\u1ef1c t\u1ebf. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y n\u1eb1m \u1edf ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t, ngu\u1ed3n g\u1ed1c linh ki\u1ec7n v\u00e0 m\u1ee9c \u0111\u1ed9 nghi\u00eam ng\u1eb7t trong qu\u00e1 tr\u00ecnh ki\u1ec3m tra.<\/p>\n\n <h3>C\u00e1c ch\u1ee9ng ch\u1ec9 c\u00f3 gi\u00e1 tr\u1ecb<\/h3>\n\n <p>\u0110\u1ed1i v\u1edbi ho\u1ea1t \u0111\u1ed9ng mua s\u1eafm xuy\u00ean bi\u00ean gi\u1edbi, c\u00e1c ch\u1ee9ng nh\u1eadn kh\u00f4ng ph\u1ea3i l\u00e0 \u0111i\u1ec1u t\u00f9y ch\u1ecdn. Ch\u00fang quy\u1ebft \u0111\u1ecbnh li\u1ec7u l\u00f4 h\u00e0ng c\u1ee7a b\u1ea1n c\u00f3 \u0111\u01b0\u1ee3c th\u00f4ng quan hay kh\u00f4ng v\u00e0 li\u1ec7u thi\u1ebft b\u1ecb c\u1ee7a kh\u00e1ch h\u00e0ng cu\u1ed1i c\u00f3 v\u01b0\u1ee3t qua cu\u1ed9c ki\u1ec3m to\u00e1n tu\u00e2n th\u1ee7 c\u1ee7a ch\u00ednh h\u1ecd hay kh\u00f4ng:<\/p>\n\n <ul>\n <li><strong>Li\u00ean minh ch\u00e2u \u00c2u<\/strong>: D\u1ea5u CE y\u00eau c\u1ea7u ph\u1ea3i tu\u00e2n th\u1ee7 Ch\u1ec9 th\u1ecb v\u1ec1 \u0110i\u1ec7n \u00e1p Th\u1ea5p (LVD 2014\/35\/EU) v\u1ec1 an to\u00e0n v\u00e0 Ch\u1ec9 th\u1ecb v\u1ec1 T\u01b0\u01a1ng th\u00edch \u0110i\u1ec7n t\u1eeb (EMC) (2014\/30\/EU). Ri\u00eang \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS), ti\u00eau chu\u1ea9n IEC 61204-3 quy \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u v\u1ec1 t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb (EMC) \u0111\u1ed1i v\u1edbi b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111i\u1ec7n \u00e1p th\u1ea5p.<\/li>\n <li><strong>B\u1eafc M\u1ef9<\/strong>: Ti\u00eau chu\u1ea9n UL 508 \u00e1p d\u1ee5ng cho thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p. \u0110\u00e2y l\u00e0 ti\u00eau chu\u1ea9n kh\u1eaft khe h\u01a1n so v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n UL 60950\/62368 d\u00e0nh cho thi\u1ebft b\u1ecb ti\u00eau d\u00f9ng. N\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n li\u00ean quan \u0111\u1ebfn t\u1ee7 \u0111i\u1ec1u khi\u1ec3n, h\u00e3y y\u00eau c\u1ea7u s\u1ea3n ph\u1ea9m ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn theo ti\u00eau chu\u1ea9n UL 508.<\/li>\n <li><strong>Trung Qu\u1ed1c v\u00e0 ch\u00e2u \u00c1<\/strong>: CCC (Ch\u1ee9ng nh\u1eadn b\u1eaft bu\u1ed9c c\u1ee7a Trung Qu\u1ed1c) l\u00e0 y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c b\u00e1n v\u00e0o th\u1ecb tr\u01b0\u1eddng Trung Qu\u1ed1c.<\/li>\n <li><strong>M\u1ee9c c\u01a1 s\u1edf qu\u1ed1c t\u1ebf<\/strong>: Ch\u1ee9ng nh\u1eadn ISO 9001:2015 l\u00e0 \u0111i\u1ec1u ki\u1ec7n t\u1ed1i thi\u1ec3u trong qu\u1ea3n l\u00fd ch\u1ea5t l\u01b0\u1ee3ng. Vi\u1ec7c c\u00f3 ch\u1ee9ng nh\u1eadn n\u00e0y kh\u00f4ng \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m \u2014 nh\u01b0ng vi\u1ec7c thi\u1ebfu ch\u1ee9ng nh\u1eadn l\u1ea1i l\u00e0 m\u1ed9t d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o.<\/li>\n <\/ul>\n\n <p>Khi xem x\u00e9t c\u00e1c ch\u1ee9ng nh\u1eadn c\u1ee7a nh\u00e0 cung c\u1ea5p, \u0111\u1eebng ch\u1ec9 nh\u00ecn v\u00e0o c\u00e1c bi\u1ec3u t\u01b0\u1ee3ng. H\u00e3y y\u00eau c\u1ea7u cung c\u1ea5p s\u1ed1 ch\u1ee9ng nh\u1eadn, ki\u1ec3m tra xem ph\u1ea1m vi \u00e1p d\u1ee5ng c\u00f3 bao g\u1ed3m d\u1ea3i c\u00f4ng su\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m c\u1ee7a b\u1ea1n hay kh\u00f4ng, v\u00e0 x\u00e1c nh\u1eadn r\u1eb1ng c\u00e1c ch\u1ee9ng nh\u1eadn \u0111\u00f3 v\u1eabn c\u00f2n hi\u1ec7u l\u1ef1c.<\/p>\n\n <h3>C\u00e1c ch\u1ec9 s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t<\/h3>\n\n <p>C\u00f9ng m\u1ed9t c\u1ea5u tr\u00fac m\u1ea1ch, c\u00f9ng m\u1ed9t chip \u0111i\u1ec1u khi\u1ec3n, th\u1eadm ch\u00ed c\u00f9ng m\u1ed9t danh s\u00e1ch v\u1eadt li\u1ec7u (BOM) \u2014 nh\u01b0ng hai nh\u00e0 m\u00e1y l\u1ea1i c\u00f3 th\u1ec3 s\u1ea3n xu\u1ea5t ra c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 t\u1ef7 l\u1ec7 h\u1ecfng h\u00f3c trong th\u1ef1c t\u1ebf ch\u00eanh l\u1ec7ch t\u1eeb 3 \u0111\u1ebfn 5 l\u1ea7n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 d\u1eabn \u0111\u1ebfn s\u1ef1 ch\u00eanh l\u1ec7ch n\u00e0y:<\/p>\n\n <p><strong>Mua s\u1eafm linh ki\u1ec7n v\u00e0 ki\u1ec3m tra h\u00e0ng nh\u1eadp.<\/strong> T\u1ee5 \u0111i\u1ec7n \u0111i\u1ec7n ph\u00e2n l\u00e0 nguy\u00ean nh\u00e2n h\u1ecfng h\u00f3c h\u00e0ng \u0111\u1ea7u trong c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch. Tu\u1ed5i th\u1ecd c\u1ee7a ch\u00fang tu\u00e2n theo \u0111\u1ecbnh lu\u1eadt Arrhenius: m\u1ed7i khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng 10\u00b0C, tu\u1ed5i th\u1ecd d\u1ef1 ki\u1ebfn s\u1ebd gi\u1ea3m m\u1ed9t n\u1eeda. M\u1ed9t nh\u00e0 cung c\u1ea5p s\u1eed d\u1ee5ng t\u1ee5 \u0111i\u1ec7n c\u1ee7a c\u00e1c th\u01b0\u01a1ng hi\u1ec7u n\u1ed5i ti\u1ebfng (Rubycon, Nichicon, Panasonic) c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 105\u00b0C v\u00e0 tu\u1ed5i th\u1ecd 5.000\u201310.000 gi\u1edd, \u0111\u1ed3ng th\u1eddi ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng khi nh\u1eadp h\u00e0ng, s\u1ebd ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ed9t \u0111\u1eb3ng c\u1ea5p ho\u00e0n to\u00e0n kh\u00e1c so v\u1edbi nh\u00e0 cung c\u1ea5p ch\u1ec9 mua t\u1ee5 \u0111i\u1ec7n kh\u00f4ng th\u01b0\u01a1ng hi\u1ec7u d\u1ef1a tr\u00ean gi\u00e1 c\u1ea3.<\/p>\n\n <p><strong>Ki\u1ec3m so\u00e1t quy tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/strong> C\u00e1c d\u00e2y chuy\u1ec1n l\u1eafp \u0111\u1eb7t SMT t\u1ef1 \u0111\u1ed9ng \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng m\u1ed1i h\u00e0n \u0111\u1ed3ng \u0111\u1ec1u tr\u00ean h\u00e0ng ngh\u00ecn s\u1ea3n ph\u1ea9m. T\u1ef7 l\u1ec7 \u0111\u1ea1t chu\u1ea9n ngay t\u1eeb l\u1ea7n \u0111\u1ea7u tr\u00ean 98% cho th\u1ea5y h\u1ec7 th\u1ed1ng ki\u1ec3m so\u00e1t quy tr\u00ecnh \u0111\u00e3 \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 ho\u00e0n thi\u1ec7n. N\u1ebfu t\u1ef7 l\u1ec7 n\u00e0y d\u01b0\u1edbi 95%, vi\u1ec7c s\u1eeda ch\u1eefa l\u1ea1i s\u1ebd th\u01b0\u1eddng xuy\u00ean x\u1ea3y ra, v\u00e0 c\u00e1c bo m\u1ea1ch \u0111\u00e3 qua s\u1eeda ch\u1eefa c\u00f3 t\u1ef7 l\u1ec7 h\u1ecfng h\u00f3c ti\u1ec1m \u1ea9n cao h\u01a1n.<\/p>\n\n <p><strong>Ki\u1ec3m tra cu\u1ed1i d\u00e2y chuy\u1ec1n.<\/strong> C\u00e2u h\u1ecfi then ch\u1ed1t: Nh\u00e0 m\u00e1y c\u00f3 th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m ch\u1ea1y t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 100% hay ch\u1ec9 ti\u1ebfn h\u00e0nh ki\u1ec3m tra ng\u1eabu nhi\u00ean tr\u00ean m\u1eabu? M\u1ed9t quy tr\u00ecnh ch\u1ea1y t\u1ea3i \u0111\u00fang chu\u1ea9n s\u1ebd v\u1eadn h\u00e0nh t\u1eebng thi\u1ebft b\u1ecb \u1edf m\u1ee9c t\u1ea3i \u0111\u1ecbnh m\u1ee9c t\u1ed1i \u0111a trong 4\u201324 gi\u1edd trong m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec7t \u0111\u1ed9 40\u201360\u00b0C, nh\u1eb1m lo\u1ea1i b\u1ecf c\u00e1c s\u1ef1 c\u1ed1 h\u1ecfng h\u00f3c s\u1edbm tr\u01b0\u1edbc khi s\u1ea3n ph\u1ea9m \u0111\u1ebfn tay kh\u00e1ch h\u00e0ng. K\u1ebft h\u1ee3p v\u1edbi c\u00e1c th\u1eed nghi\u1ec7m ch\u1ee9c n\u0103ng theo ti\u00eau chu\u1ea9n 100% \u2014 \u0111i\u1ec1u ch\u1ec9nh t\u1ea3i, \u0111\u1ed9 g\u1ee3n v\u00e0 nhi\u1ec5u, \u0111\u01b0\u1eddng cong hi\u1ec7u su\u1ea5t, v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111i\u1ec7n m\u00f4i \u2014 \u0111i\u1ec1u n\u00e0y gi\u00fap ph\u00e2n bi\u1ec7t c\u00e1c s\u1ea3n ph\u1ea9m th\u00f4ng th\u01b0\u1eddng v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m c\u1ea5p c\u00f4ng nghi\u1ec7p.<\/p>\n\n <p><strong>\u0110\u1ed9 s\u00e2u c\u1ee7a chu\u1ed7i cung \u1ee9ng.<\/strong> M\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t s\u1edf h\u1eefu d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t c\u1ee7a ri\u00eang m\u00ecnh c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t th\u1eddi gian giao h\u00e0ng, s\u1ef1 \u1ed5n \u0111\u1ecbnh v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 kh\u1ea3 n\u0103ng t\u00f9y ch\u1ec9nh. Ng\u01b0\u1ee3c l\u1ea1i, m\u1ed9t c\u00f4ng ty th\u01b0\u01a1ng m\u1ea1i ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c nh\u00e0 m\u00e1y th\u01b0\u1ee3ng ngu\u1ed3n th\u00ec kh\u00f4ng ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c b\u1ea5t k\u1ef3 y\u1ebfu t\u1ed1 n\u00e0o trong s\u1ed1 n\u00e0y. \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi mua \u0111\u1eb7t h\u00e0ng l\u1eb7p l\u1ea1i ho\u1eb7c c\u00f3 nhu c\u1ea7u \u0111i\u1ec1u ch\u1ec9nh theo m\u00f4 h\u00ecnh OEM\/ODM, s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y c\u00f3 \u00fd ngh\u0129a v\u00f4 c\u00f9ng quan tr\u1ecdng.<\/p>\n\n \n <div class=\"bp-checklist bd-reveal\">\n <div class=\"bp-checklist-title\">Danh s\u00e1ch ki\u1ec3m tra c\u00e1c ch\u1ec9 s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng<\/div>\n <div class=\"bp-check-rows\">\n <div class=\"bp-check-row\">\n <svg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg>\n <span>T\u1ee5 \u0111i\u1ec7n ph\u00e2n th\u01b0\u01a1ng hi\u1ec7u c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt 105\u00b0C \/ 5.000\u201310.000 gi\u1edd<\/span>\n <\/div>\n <div class=\"bp-check-row\">\n <svg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg>\n <span>C\u00e1c d\u00e2y chuy\u1ec1n SMT t\u1ef1 \u0111\u1ed9ng c\u00f3 t\u1ef7 l\u1ec7 \u0111\u1ea1t chu\u1ea9n ngay t\u1eeb l\u1ea7n \u0111\u1ea7u tr\u00ean 98%<\/span>\n <\/div>\n <div class=\"bp-check-row\">\n <svg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg>\n <span>Th\u1eed nghi\u1ec7m ch\u1ea1y th\u1eed t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 100% (4\u201324 gi\u1edd \u1edf nhi\u1ec7t \u0111\u1ed9 40\u201360\u00b0C)<\/span>\n <\/div>\n <div class=\"bp-check-row\">\n <svg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><polyline points=\"22 4 12 14.01 9 11.01\"\/><\/svg>\n <span>Nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t thu\u1ed9c s\u1edf h\u1eefu c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t (kh\u00f4ng ph\u1ea3i c\u00f4ng ty th\u01b0\u01a1ng m\u1ea1i)<\/span>\n <\/div>\n <\/div>\n <\/div>\n\n <h2>Quy\u1ebft \u0111\u1ecbnh cu\u1ed1i c\u00f9ng: Ngu\u1ed3n tuy\u1ebfn t\u00ednh hay ngu\u1ed3n chuy\u1ec3n m\u1ea1ch?<\/h2>\n\n <p>\u0110\u1ebfn l\u00fac n\u00e0y, xu h\u01b0\u1edbng h\u1eb3n \u0111\u00e3 r\u00f5 r\u00e0ng: kh\u00f4ng c\u00f3 kh\u00e1i ni\u1ec7m \u201ct\u1ed1t h\u01a1n\u201d mang t\u00ednh ph\u1ed5 qu\u00e1t. Ch\u1ec9 c\u00f3 \u201ct\u1ed1t h\u01a1n cho <em>c\u1ee7a b\u1ea1n<\/em> \u1ee9ng d\u1ee5ng.\u201d H\u00e3y s\u1eed d\u1ee5ng b\u1ea3ng quy\u1ebft \u0111\u1ecbnh n\u00e0y nh\u01b0 m\u1ed9t t\u00e0i li\u1ec7u tham kh\u1ea3o nhanh:<\/p>\n\n <div class=\"table-wrapper\">\n <table>\n <thead><tr><th>N\u1ebfu \u01b0u ti\u00ean c\u1ee7a b\u1ea1n l\u00e0\u2026<\/th><th>L\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t c\u1ee7a b\u1ea1n l\u00e0\u2026<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>\u0110\u1ed9 nhi\u1ec5u c\u1ef1c th\u1ea5p cho c\u00e1c m\u1ea1ch t\u01b0\u01a1ng t\u1ef1 ch\u00ednh x\u00e1c<\/td><td>B\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh<\/td><\/tr>\n <tr><td>Hi\u1ec7u su\u1ea5t t\u1ed1i \u0111a v\u00e0 nhi\u1ec7t sinh ra t\u1ed1i thi\u1ec3u<\/td><td>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/td><\/tr>\n <tr><td>K\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn v\u00e0 l\u1eafp \u0111\u1eb7t tr\u00ean thanh DIN<\/td><td>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/td><\/tr>\n <tr><td>Thi\u1ebft k\u1ebf \u0111\u01a1n gi\u1ea3n, chi ph\u00ed BOM th\u1ea5p nh\u1ea5t d\u01b0\u1edbi 50 W<\/td><td>B\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh<\/td><\/tr>\n <tr><td>C\u00f4ng su\u1ea5t cao tr\u00ean 100 W<\/td><td>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/td><\/tr>\n <tr><td>C\u1ea3 hai y\u1ebfu t\u1ed1 hi\u1ec7u qu\u1ea3 <em>v\u00e0<\/em> ti\u1ebfng \u1ed3n th\u1ea5p<\/td><td>H\u1ec7 th\u1ed1ng lai: SMPS + LDO \u0111i\u1ec1u ch\u1ec9nh sau<\/td><\/tr>\n <tr><td>Ch\u1ea5t l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh trong c\u00e1c \u0111\u01a1n h\u00e0ng l\u1eb7p l\u1ea1i<\/td><td>H\u1ee3p t\u00e1c v\u1edbi m\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t s\u1edf h\u1eefu c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t ri\u00eang<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>N\u1ebfu b\u1ea1n ch\u1ec9 c\u00f3 th\u1ec3 ghi nh\u1edb m\u1ed9t nguy\u00ean t\u1eafc chung: khi c\u00f4ng su\u1ea5t tr\u00ean 50 W ho\u1eb7c kh\u00f4ng gian b\u1ecb h\u1ea1n ch\u1ebf, h\u00e3y ch\u1ecdn m\u1ea1ch chuy\u1ec3n m\u1ea1ch; khi y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 \u1ed3n cao v\u00e0 c\u00f4ng su\u1ea5t d\u01b0\u1edbi 50 W, h\u00e3y ch\u1ecdn m\u1ea1ch tuy\u1ebfn t\u00ednh; n\u1ebfu c\u1ea7n c\u1ea3 hai y\u1ebfu t\u1ed1, h\u00e3y ch\u1ecdn m\u1ea1ch lai.<\/p>\n\n \n <div class=\"bp-cta-end bd-reveal\">\n <svg width=\"28\" height=\"28\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"\/><\/svg>\n <h4>H\u00e3y t\u1ef1 tin l\u1ef1a ch\u1ecdn th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cho b\u1ed9 ngu\u1ed3n ti\u1ebfp theo c\u1ee7a b\u1ea1n<\/h4>\n <p>So s\u00e1nh c\u00e1c l\u1ef1a ch\u1ecdn b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch g\u1eafn tr\u00ean thanh DIN t\u1eeb m\u1ed9t nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 38 n\u0103m kinh nghi\u1ec7m s\u1ea3n xu\u1ea5t.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">Xem c\u00e1c b\u1ed9 ngu\u1ed3n g\u1eafn tr\u00ean thanh DIN <svg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"vertical-align: -3px; margin-left: 4px;\"><line x1=\"5\" y1=\"12\" x2=\"19\" y2=\"12\"\/><polyline points=\"12 5 19 12 12 19\"\/><\/svg><\/a>\n <\/div>\n\n <p><em>\u0110\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 v\u00e0 chuy\u00ean vi\u00ean mua h\u00e0ng \u0111ang \u0111\u00e1nh gi\u00e1 c\u00e1c l\u1ef1a ch\u1ecdn v\u1ec1 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch c\u00f4ng nghi\u1ec7p g\u1eafn tr\u00ean thanh DIN \u2014 v\u1edbi d\u1ea3i c\u00f4ng su\u1ea5t t\u1eeb 15 W \u0111\u1ebfn 480 W, tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n CE, CCC v\u00e0 RoHS, \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t t\u1ea1i nh\u00e0 m\u00e1y r\u1ed9ng 8.000 m\u00b2 v\u1edbi c\u00e1c d\u00e2y chuy\u1ec1n SMT ho\u00e0n to\u00e0n t\u1ef1 \u0111\u1ed9ng v\u00e0 quy tr\u00ecnh ki\u1ec3m tra l\u00e3o h\u00f3a 100% \u2014 danh m\u1ee5c s\u1ea3n ph\u1ea9m c\u1ee7a OMCH cung c\u1ea5p m\u1ed9t c\u01a1 s\u1edf tham chi\u1ebfu thi\u1ebft th\u1ef1c \u0111\u1ec3 so s\u00e1nh v\u00e0 \u0111\u00e1nh gi\u00e1 n\u0103ng l\u1ef1c c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p.<\/em><\/p>\n\n <h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n\n <ol>\n <li>Basso, Christophe. <em>Thi\u1ebft k\u1ebf v\u00f2ng \u0111i\u1ec1u khi\u1ec3n cho b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch: H\u01b0\u1edbng d\u1eabn th\u1ef1c h\u00e0nh<\/em>. Artech House, 2012.<\/li>\n <li>IEC 61204-3:2016. <em>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111i\u1ec7n \u00e1p th\u1ea5p \u2014 Ph\u1ea7n 3: T\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb (EMC)<\/em>. \u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf.<\/li>\n <li>IEC 60601-1-2:2014. <em>Thi\u1ebft b\u1ecb \u0111i\u1ec7n y t\u1ebf \u2014 Ph\u1ea7n 1-2: Y\u00eau c\u1ea7u chung v\u1ec1 an to\u00e0n c\u01a1 b\u1ea3n v\u00e0 hi\u1ec7u su\u1ea5t thi\u1ebft y\u1ebfu \u2014 Ti\u00eau chu\u1ea9n li\u00ean quan: Nhi\u1ec5u \u0111i\u1ec7n t\u1eeb<\/em>. \u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf.<\/li>\n <li>UL 508A. <em>Ti\u00eau chu\u1ea9n cho B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p<\/em>. Underwriters Laboratories.<\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/switch-mode-power-supply\/\">B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch OMCH tr\u00ean thanh DIN<\/a><\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/8000m%C2%B2-factory\/\">Nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t OMCH<\/a><\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/\">OMCH<\/a><\/li>\n <\/ol>\n <\/article>\n<\/div>\n\n<\/body><\/html>","protected":false},"excerpt":{"rendered":"<p>B\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh so v\u1edbi b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch: H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn th\u1ef1c ti\u1ec5n d\u00e0nh cho k\u1ef9 s\u01b0 Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) l\u00e0 m\u1ed9t trong nh\u1eefng quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u ti\u00ean m\u00e0 b\u1ea1n s\u1ebd ph\u1ea3i \u0111\u1ed1i m\u1eb7t khi thi\u1ebft k\u1ebf ho\u1eb7c n\u00e2ng c\u1ea5p thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p. C\u1ea3 hai \u0111\u1ec1u chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u00e0nh \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u (DC) \u1ed5n \u0111\u1ecbnh \u2014 nh\u01b0ng c\u00e1ch th\u1ee9c qu\u1ea3n l\u00fd n\u0103ng l\u01b0\u1ee3ng c\u1ee7a ch\u00fang l\u1ea1i ho\u00e0n to\u00e0n kh\u00e1c bi\u1ec7t [\u2026]<\/p>","protected":false},"author":4,"featured_media":5269,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Linear vs Switching Power Supply: A Practical Selection Guide for Engineers","_seopress_titles_desc":"Compare linear and switching power supplies (SMPS) with this practical selection guide for engineers. Learn how to balance efficiency, noise, size, and cost.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-5264","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\/5264","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=5264"}],"version-history":[{"count":5,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/5264\/revisions"}],"predecessor-version":[{"id":12028,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/5264\/revisions\/12028"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/5269"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=5264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=5264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=5264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}