{"id":4789,"date":"2025-05-14T03:20:54","date_gmt":"2025-05-14T03:20:54","guid":{"rendered":"https:\/\/www.omch.com\/?p=4789"},"modified":"2026-07-16T08:27:11","modified_gmt":"2026-07-16T08:27:11","slug":"what-is-a-switching-power-supply","status":"publish","type":"post","link":"https:\/\/www.omch.com\/vi\/what-is-a-switching-power-supply\/","title":{"rendered":"B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) l\u00e0 g\u00ec? C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i v\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 c\u1ea7n l\u01b0u \u00fd"},"content":{"rendered":"\n\n \n \n B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) l\u00e0 g\u00ec? C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i v\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 c\u1ea7n l\u01b0u \u00fd<\/title>\n<\/head>\n<body>\n<!-- \u2193\u2193\u2193 The deployable fragment begins here. \u2193\u2193\u2193 -->\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 tokens \u2014 all solid, verbatim from design-plan.md *\/\n --body-bg: #FFFFFF;\n --text-primary: #333333;\n --text-secondary: #6E6E6E;\n --heading-ink: #000000;\n --accent: #479DE2;\n --accent-text: #0D3972;\n --accent-hot: #FD9649;\n --inverse-bg: #1E1E1E;\n --inverse-text: #FFFFFF;\n --inverse-text-2: #B0B0B0;\n --inverse-accent: #479DE2;\n --card-fill: #F4F8FC;\n --card-border: #C8C8C8;\n --card-text: #333333;\n --card-text-2: #6E6E6E;\n --panel-fill: #FAFAFA;\n --panel-text: #333333;\n --panel-text-2: #6E6E6E;\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(--text-primary);\n background: var(--body-bg);\n padding: 40px;\n max-width: 100%;\n box-sizing: border-box;\n }\n .bd-post a { overflow-wrap: anywhere; 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text-align: center; }\n .bp-cta-end-icon { display: block; margin: 0 auto 12px; color: var(--inverse-accent); }\n .bp-cta-end-title { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 22px; color: var(--inverse-text); margin-bottom: 8px; }\n .bp-cta-end-sub { font-family: \"Manrope\", sans-serif; font-weight: 400; font-size: 14px; color: var(--inverse-text-2); margin-bottom: 20px; max-width: 480px; margin-left: auto; margin-right: auto; line-height: 1.5; }\n .bp-cta-end-btn { display: inline-flex; align-items: center; gap: 8px; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px; padding: 12px 28px; border-radius: 6px; border: none; cursor: pointer; text-decoration: none; background: var(--accent-hot); color: var(--btn-ink); }\n .bp-cta-end-btn:hover { background: var(--btn-white); color: var(--btn-ink); }\n .bp-cta-end-btn svg { flex-shrink: 0; }\n\n \/* Motion \u2014 sanctioned, gated *\/\n @media (prefers-reduced-motion: no-preference) {\n @supports (animation-timeline: view()) {\n .bd-post .bd-reveal { animation: bd-fade-in linear both; animation-timeline: view(); animation-range: entry 0% entry 35%; }\n @keyframes bd-fade-in { from { opacity: 0; } to { opacity: 1; } }\n }\n .bd-post h2 { transition: color .2s ease-out, transform .2s ease-out; transform-origin: left; }\n .bd-post h2:hover { color: var(--accent-text); transform: scale(1.02); }\n .bd-post p a, .bd-post li a { transition: color .2s ease-out, text-decoration-color .2s ease-out; }\n .bd-post p a:hover, .bd-post li a:hover { color: var(--accent-hot); }\n .bd-post .bp-1-stat-compare { transition: transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bp-1-stat-compare:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-1-col { transition: color .2s ease-out; }\n .bd-post .bp-1-col:hover .bp-1-num-smps,\n .bd-post .bp-1-col:hover .bp-1-icon { color: var(--accent-hot); }\n .bd-post .bp-2-stage { transition: color .2s ease-out; }\n .bd-post .bp-2-stage:hover .bp-2-num { box-shadow: 0 0 0 3px var(--accent-hot); }\n .bd-post .bp-2-stage:hover .bp-2-title { color: var(--accent-text); }\n .bd-post .bp-3-row { transition: color .2s ease-out; }\n .bd-post .bp-3-row:hover .bp-3-check { color: var(--accent-hot); }\n .bd-post .bp-cta-end-btn { transition: background .15s ease, color .15s ease, transform .15s ease; }\n .bd-post .bp-cta-end-btn:hover { transform: translateY(-1px); }\n }\n\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-1-stat-compare { grid-template-columns: 1fr; }\n .bd-post .bp-1-col:first-child { border-right: none; border-bottom: 1px solid var(--card-border); padding-bottom: 12px; }\n .bd-post .bp-1-col:last-child { padding-top: 12px; }\n .bd-post .bp-2-flow { flex-direction: column; }\n .bd-post .bp-2-stage { text-align: left; display: flex; align-items: flex-start; gap: 12px; }\n .bd-post .bp-2-num { flex-shrink: 0; }\n .bd-post .bp-2-arrow { width: 100%; height: 20px; display: flex; align-items: center; justify-content: center; }\n .bd-post .bp-2-arrow svg { transform: rotate(90deg); }\n .bd-post .bp-2-title { margin-top: 0; }\n }\n <\/style>\n <article class=\"bd-post-article\">\n <h1><\/h1>\n\n <h2>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) l\u00e0 g\u00ec?<\/h2>\n<img decoding=\"async\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2025\/05\/Gemini_Generated_Image_45wkkt45wkkt45wk.webp\" alt=\"M\u00f4 t\u1ea3\" class=\"bd-post-image\" loading=\"lazy\">\n\n <p>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u2014 c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1ed9 ngu\u1ed3n ch\u1ebf \u0111\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 ngu\u1ed3n ki\u1ec3u chuy\u1ec3n m\u1ea1ch ho\u1eb7c \u0111\u01a1n gi\u1ea3n l\u00e0 SMPS \u2014 l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed c\u00f3 ch\u1ee9c n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n t\u1eeb d\u1ea1ng n\u00e0y sang d\u1ea1ng kh\u00e1c b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh chuy\u1ec3n m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao. Kh\u00e1c v\u1edbi c\u00e1c b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh c\u0169, v\u1ed1n ti\u00eau t\u00e1n \u0111i\u1ec7n \u00e1p d\u01b0 th\u1eeba d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t th\u1ea3i, b\u1ed9 ngu\u1ed3n SMPS nhanh ch\u00f3ng b\u1eadt v\u00e0 t\u1eaft b\u00f3ng b\u00e1n d\u1eabn h\u00e0ng ngh\u00ecn l\u1ea7n m\u1ed7i gi\u00e2y, truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng d\u01b0\u1edbi d\u1ea1ng c\u00e1c xung ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n\n <p>T\u1eeb vi\u1ebft t\u1eaft SMPS l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Switched-Mode Power Supply (B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch). B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 th\u1ea5y n\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cb\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch\u201d ho\u1eb7c \u201cb\u1ed9 ngu\u1ed3n ch\u1ebf \u0111\u1ed9 chuy\u1ec3n m\u1ea1ch\u201d. C\u1ea3 ba thu\u1eadt ng\u1eef n\u00e0y \u0111\u1ec1u ch\u1ec9 c\u00f9ng m\u1ed9t c\u00f4ng ngh\u1ec7. \u0110i\u1ec1u quan tr\u1ecdng kh\u00f4ng ph\u1ea3i l\u00e0 t\u00ean g\u1ecdi m\u00e0 l\u00e0 \u00fd t\u01b0\u1edfng c\u1ed1t l\u00f5i: b\u1eb1ng c\u00e1ch ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 cao (th\u01b0\u1eddng t\u1eeb 20 kilohertz \u0111\u1ebfn v\u00e0i megahertz), SMPS \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c hi\u1ec7u su\u1ea5t t\u1eeb 80% \u0111\u1ebfn h\u01a1n 95%. Trong khi \u0111\u00f3, so s\u00e1nh v\u1edbi ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh, m\u1ee9c hi\u1ec7u su\u1ea5t th\u01b0\u1eddng ch\u1ec9 \u0111\u1ea1t t\u1eeb 40% \u0111\u1ebfn 60%.<\/p>\n\n <p>T\u1ea1i sao b\u1ea1n n\u00ean quan t\u00e2m? B\u1edfi v\u00ec c\u00f4ng ngh\u1ec7 SMPS ch\u00ednh l\u00e0 l\u00fd do t\u1ea1i sao b\u1ed9 s\u1ea1c \u0111i\u1ec7n tho\u1ea1i c\u1ee7a b\u1ea1n v\u1eeba v\u1eb7n trong l\u00f2ng b\u00e0n tay thay v\u00ec n\u1eb7ng nh\u01b0 m\u1ed9t vi\u00ean g\u1ea1ch. \u0110\u00f3 c\u0169ng l\u00e0 l\u00fd do t\u1ea1i sao c\u00e1c t\u1ee7 \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p c\u00f3 th\u1ec3 c\u1ea5p ngu\u1ed3n cho h\u00e0ng ch\u1ee5c thi\u1ebft b\u1ecb t\u1eeb c\u00e1c b\u1ed9 ngu\u1ed3n DIN-rail nh\u1ecf g\u1ecdn thay v\u00ec c\u00e1c d\u00e3y bi\u1ebfn \u00e1p c\u1ed3ng k\u1ec1nh chi\u1ebfm c\u1ea3 m\u1ed9t c\u0103n ph\u00f2ng. M\u1ed7i khi b\u1ea1n c\u1eafm m\u00e1y t\u00ednh x\u00e1ch tay, b\u1eadt PLC trong nh\u00e0 m\u00e1y ho\u1eb7c s\u1ea1c d\u1ee5ng c\u1ee5 kh\u00f4ng d\u00e2y, b\u1ea1n \u0111ang d\u1ef1a v\u00e0o b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111\u1ec3 cung c\u1ea5p ngu\u1ed3n \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u qu\u1ea3 t\u1eeb \u1ed5 c\u1eafm \u0111i\u1ec7n xoay chi\u1ec1u (AC) tr\u00ean t\u01b0\u1eddng.<\/p>\n\n <h2>Ngu\u1ed3n \u0111i\u1ec7n chuy\u1ec3n m\u1ea1ch (SMPS) so v\u1edbi ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh \u2014 T\u1ea1i sao s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y l\u1ea1i quan tr\u1ecdng<\/h2>\n\n <p>\u0110\u1ec3 th\u1ef1c s\u1ef1 hi\u1ec3u SMPS l\u00e0 g\u00ec, b\u1ea1n c\u1ea7n hi\u1ec3u n\u00f3 \u0111\u00e3 thay th\u1ebf thi\u1ebft b\u1ecb n\u00e0o. B\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111\u1ec1u gi\u1ea3i quy\u1ebft c\u00f9ng m\u1ed9t v\u1ea5n \u0111\u1ec1 c\u01a1 b\u1ea3n \u2014 chuy\u1ec3n \u0111\u1ed5i m\u1ed9t \u0111i\u1ec7n \u00e1p th\u00e0nh \u0111i\u1ec7n \u00e1p kh\u00e1c \u2014 nh\u01b0ng ch\u00fang th\u1ef1c hi\u1ec7n \u0111i\u1ec1u n\u00e0y theo nh\u1eefng c\u00e1ch ho\u00e0n to\u00e0n tr\u00e1i ng\u01b0\u1ee3c nhau. B\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nh\u01b0 vi\u1ec7c l\u00e1i xe v\u1edbi phanh \u0111\u01b0\u1ee3c \u0111\u1ea1p m\u1ed9t ph\u1ea7n: b\u00f3ng b\u00e1n d\u1eabn \u0111i\u1ec1u ch\u1ec9nh ho\u1ea1t \u0111\u1ed9ng trong v\u00f9ng tuy\u1ebfn t\u00ednh, li\u00ean t\u1ee5c ti\u00eau t\u00e1n ch\u00eanh l\u1ec7ch gi\u1eefa \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t. SMPS ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nh\u01b0 \u0111i\u1ec1u ch\u1ebf xung: b\u00f3ng b\u00e1n d\u1eabn chuy\u1ec3n m\u1ea1ch \u1edf tr\u1ea1ng th\u00e1i b\u1eadt ho\u00e0n to\u00e0n ho\u1eb7c t\u1eaft ho\u00e0n to\u00e0n, v\u00e0 n\u0103ng l\u01b0\u1ee3ng ch\u1ec9 \u0111\u01b0\u1ee3c truy\u1ec1n trong c\u00e1c kho\u1ea3ng th\u1eddi gian \u0111\u01b0\u1ee3c \u0111\u1ecbnh th\u1eddi ch\u00ednh x\u00e1c.<\/p>\n\n <h3>Hi\u1ec7u qu\u1ea3 \u2014 L\u1ee3i th\u1ebf c\u1ed1t l\u00f5i<\/h3>\n\n <p>Hi\u1ec7u su\u1ea5t kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t chi ti\u1ebft nh\u1ecf nh\u1eb7t. \u0110\u00f3 ch\u00ednh l\u00e0 l\u00fd do duy nh\u1ea5t khi\u1ebfn c\u00f4ng ngh\u1ec7 SMPS ra \u0111\u1eddi. M\u1ed9t b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh cung c\u1ea5p 100 watt cho t\u1ea3i c\u00f3 th\u1ec3 ti\u00eau th\u1ee5 t\u1eeb 170 \u0111\u1ebfn 250 watt t\u1eeb ngu\u1ed3n \u0111i\u1ec7n l\u01b0\u1edbi, bi\u1ebfn t\u1eeb 70 \u0111\u1ebfn 150 watt th\u00e0nh nhi\u1ec7t. Trong khi \u0111\u00f3, m\u1ed9t b\u1ed9 ngu\u1ed3n SMPS t\u01b0\u01a1ng \u0111\u01b0\u01a1ng cung c\u1ea5p c\u00f9ng m\u1ee9c 100 watt ch\u1ec9 ti\u00eau th\u1ee5 t\u1eeb 105 \u0111\u1ebfn 125 watt, ch\u1ec9 l\u00e3ng ph\u00ed t\u1eeb 5 \u0111\u1ebfn 25 watt d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t.<\/p>\n\n <p>Nguy\u00ean l\u00fd v\u1eadt l\u00fd \u0111\u1eb1ng sau kho\u1ea3ng c\u00e1ch n\u00e0y r\u1ea5t \u0111\u01a1n gi\u1ea3n. Trong b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh tuy\u1ebfn t\u00ednh, b\u00f3ng b\u00e1n d\u1eabn truy\u1ec1n d\u1eabn ho\u1ea1t \u0111\u1ed9ng trong v\u00f9ng ho\u1ea1t \u0111\u1ed9ng, n\u01a1i \u0111i\u1ec7n \u00e1p hai \u0111\u1ea7u b\u00f3ng b\u00e1n d\u1eabn nh\u00e2n v\u1edbi d\u00f2ng \u0111i\u1ec7n \u0111i qua n\u00f3 b\u1eb1ng c\u00f4ng su\u1ea5t ti\u00eau t\u00e1n li\u00ean t\u1ee5c. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng nh\u01b0 vi\u1ec7c gi\u1eef m\u1ed9t c\u00e1nh c\u1eeda m\u1edf m\u1ed9t n\u1eeda tr\u01b0\u1edbc gi\u00f3 m\u1ea1nh \u2014 b\u1ea1n ph\u1ea3i ch\u1ed1ng ch\u1ecdi v\u1edbi gi\u00f3 su\u1ed1t th\u1eddi gian \u0111\u00f3. Trong m\u1ed9t SMPS, b\u00f3ng b\u00e1n d\u1eabn chuy\u1ec3n m\u1ea1ch (th\u01b0\u1eddng l\u00e0 MOSFET) chuy\u1ec3n \u0111\u1ed5i gi\u1eefa hai tr\u1ea1ng th\u00e1i: tr\u1ea1ng th\u00e1i m\u1edf ho\u00e0n to\u00e0n, trong \u0111\u00f3 \u0111i\u1ec7n tr\u1edf c\u1ee7a n\u00f3 gi\u1ea3m xu\u1ed1ng m\u1ee9c milliohm v\u00e0 \u0111i\u1ec7n \u00e1p qua n\u00f3 g\u1ea7n b\u1eb1ng kh\u00f4ng, v\u00e0 tr\u1ea1ng th\u00e1i t\u1eaft ho\u00e0n to\u00e0n, trong \u0111\u00f3 d\u00f2ng \u0111i\u1ec7n b\u1eb1ng kh\u00f4ng. Trong c\u1ea3 hai tr\u1ea1ng th\u00e1i, c\u00f4ng su\u1ea5t ti\u00eau t\u00e1n (\u0111i\u1ec7n \u00e1p nh\u00e2n v\u1edbi d\u00f2ng \u0111i\u1ec7n) g\u1ea7n b\u1eb1ng kh\u00f4ng. C\u00e1c t\u1ed5n th\u1ea5t duy nh\u1ea5t x\u1ea3y ra trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i ng\u1eafn ng\u1ee7i gi\u1eefa c\u00e1c tr\u1ea1ng th\u00e1i, k\u00e9o d\u00e0i h\u00e0ng ch\u1ee5c nano gi\u00e2y.<\/p>\n\n <!-- BP-1: Efficiency Stat Comparison -->\n <div class=\"bp-1-stat-compare bd-reveal\">\n <div class=\"bp-1-col\">\n <svg class=\"bp-1-icon\" width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polygon points=\"13 2 3 14 12 14 11 22 21 10 12 10 13 2\"\/><\/svg>\n <div class=\"bp-1-num bp-1-num-smps\">T\u00e1m m\u01b0\u01a1i ngh\u00ecn \u0111\u1ebfn ch\u00edn m\u01b0\u01a1i l\u0103m ngh\u00ecn ba tr\u0103m ba m\u01b0\u01a1i ba<\/div>\n <div class=\"bp-1-label\">Hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS)<\/div>\n <div class=\"bp-1-sub\">5\u201325W b\u1ecb l\u00e3ng ph\u00ed khi t\u1ea3i 100W<\/div>\n <\/div>\n <div class=\"bp-1-col\">\n <svg class=\"bp-1-icon\" width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M14 14.76V3.5a2.5 2.5 0 0 0-5 0v11.26a4.5 4.5 0 1 0 5 0z\"\/><\/svg>\n <div class=\"bp-1-num bp-1-num-linear\">T\u1eeb b\u1ed1n m\u01b0\u01a1i ngh\u00ecn \u0111\u1ebfn s\u00e1u m\u01b0\u01a1i m\u1ed1t ngh\u00ecn, ba tr\u0103m ba m\u01b0\u01a1i ba<\/div>\n <div class=\"bp-1-label\">Hi\u1ec7u su\u1ea5t tuy\u1ebfn t\u00ednh<\/div>\n <div class=\"bp-1-sub\">70\u2013150W b\u1ecb l\u00e3ng ph\u00ed khi t\u1ea3i 100W<\/div>\n <\/div>\n <\/div>\n\n <h3>K\u00edch th\u01b0\u1edbc v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng \u2014 T\u1ea1i sao b\u1ed9 s\u1ea1c c\u1ee7a b\u1ea1n kh\u00f4ng to nh\u01b0 m\u1ed9t vi\u00ean g\u1ea1ch<\/h3>\n\n <p>H\u00e3y th\u00e1o n\u1eafp m\u1ed9t b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh 100 watt, b\u1ea1n s\u1ebd th\u1ea5y m\u1ed9t cu\u1ed9n bi\u1ebfn \u00e1p c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng m\u1ed9t chi\u1ebfc h\u1ed9p gi\u00e0y nh\u1ecf, \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o xung quanh m\u1ed9t l\u00f5i s\u1eaft n\u1eb7ng. C\u00f2n n\u1ebfu th\u00e1o n\u1eafp m\u1ed9t b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) 100 watt, cu\u1ed9n bi\u1ebfn \u00e1p s\u1ebd v\u1eeba v\u1eb7n trong l\u00f2ng b\u00e0n tay b\u1ea1n, \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o xung quanh m\u1ed9t l\u00f5i ferit nh\u1eb9. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y ch\u1ee7 y\u1ebfu n\u1eb1m \u1edf t\u1ea7n s\u1ed1.<\/p>\n\n <p>M\u00e1y bi\u1ebfn \u00e1p truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng qua l\u00f5i t\u1eeb, v\u00e0 l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng m\u00e0 l\u00f5i c\u00f3 th\u1ec3 x\u1eed l\u00fd trong m\u1ed7i chu k\u1ef3 \u0111\u01b0\u1ee3c quy\u1ebft \u0111\u1ecbnh b\u1edfi k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u1ee7a n\u00f3. \u1ede t\u1ea7n s\u1ed1 50 ho\u1eb7c 60 hertz (t\u1ea7n s\u1ed1 c\u1ee7a ngu\u1ed3n \u0111i\u1ec7n l\u01b0\u1edbi), m\u1ed9t m\u00e1y bi\u1ebfn \u00e1p 100 watt c\u1ea7n m\u1ed9t l\u00f5i s\u1eaft c\u00f3 k\u00edch th\u01b0\u1edbc \u0111\u00e1ng k\u1ec3. \u1ede t\u1ea7n s\u1ed1 100 kilohertz (t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch SMPS \u0111i\u1ec3n h\u00ecnh), l\u00f5i c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00f4ng su\u1ea5t l\u1edbn h\u01a1n kho\u1ea3ng 2.000 l\u1ea7n. Trong th\u1ef1c t\u1ebf, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf SMPS \u0111\u00e1nh \u0111\u1ed5i ph\u1ea7n l\u1edbn dung l\u01b0\u1ee3ng d\u1ef1 tr\u1eef \u0111\u00f3 \u0111\u1ec3 gi\u1ea3m k\u00edch th\u01b0\u1edbc \u0111\u00e1ng k\u1ec3. M\u1ed9t b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh 100 watt c\u00f3 th\u1ec3 n\u1eb7ng t\u1eeb 2 \u0111\u1ebfn 3 kilogram; trong khi \u0111\u00f3, m\u1ed9t b\u1ed9 SMPS t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ch\u1ec9 n\u1eb7ng t\u1eeb 300 \u0111\u1ebfn 500 gram.<\/p>\n\n <h3>Ti\u1ebfng \u1ed3n \u0111\u1ea7u ra v\u00e0 \u0111\u1ed9 g\u1ee3n \u2014 S\u1ef1 \u0111\u00e1nh \u0111\u1ed5i<\/h3>\n\n <p>N\u1ebfu c\u00f4ng ngh\u1ec7 SMPS v\u01b0\u1ee3t tr\u1ed9i \u0111\u1ebfn v\u1eady, t\u1ea1i sao ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh v\u1eabn c\u00f2n t\u1ed3n t\u1ea1i? C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 do nhi\u1ec5u. Qu\u00e1 tr\u00ecnh chuy\u1ec3n m\u1ea1ch t\u1ea7n s\u1ed1 cao kh\u00f4ng th\u1ec3 tr\u00e1nh kh\u1ecfi vi\u1ec7c t\u1ea1o ra dao \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p \u1edf \u0111\u1ea7u ra \u2014 th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb 50 \u0111\u1ebfn 150 miliv\u00f4n \u0111\u1ec9nh-\u0111\u1ec9nh trong m\u1ed9t b\u1ed9 SMPS ti\u00eau chu\u1ea9n \u2014 c\u00f9ng v\u1edbi nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) c\u00f3 th\u1ec3 lan truy\u1ec1n sang c\u00e1c m\u1ea1ch nh\u1ea1y c\u1ea3m l\u00e2n c\u1eadn. M\u1ed9t b\u1ed9 ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf t\u1ed1t s\u1ebd t\u1ea1o ra dao \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p d\u01b0\u1edbi 1 miliv\u00f4n.<\/p>\n\n <p>\u0110\u1ed1i v\u1edbi c\u00e1c m\u1ea1ch k\u1ef9 thu\u1eadt s\u1ed1, vi \u0111i\u1ec1u khi\u1ec3n, r\u01a1le v\u00e0 h\u1ea7u h\u1ebft c\u00e1c c\u1ea3m bi\u1ebfn c\u00f4ng nghi\u1ec7p, \u0111\u1ed9 g\u1ee3n t\u1eeb 50 \u0111\u1ebfn 150 miliv\u00f4n l\u00e0 ho\u00e0n to\u00e0n ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c. Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi c\u00e1c ph\u00e9p \u0111o t\u01b0\u01a1ng t\u1ef1 ch\u00ednh x\u00e1c, thi\u1ebft b\u1ecb \u00e2m thanh cao c\u1ea5p ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb y t\u1ebf nh\u1ea1y c\u1ea3m, nhi\u1ec5u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch k\u1ebft qu\u1ea3 \u0111o ho\u1eb7c g\u00e2y ra c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng \u00e2m thanh kh\u00f4ng mong mu\u1ed1n. Trong nh\u1eefng \u1ee9ng d\u1ee5ng n\u00e0y, c\u1ea7n ph\u1ea3i s\u1eed d\u1ee5ng ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh ho\u1eb7c SMPS \u00edt nhi\u1ec5u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t (c\u00f3 th\u1ec3 \u0111\u1ea1t m\u1ee9c dao \u0111\u1ed9ng d\u01b0\u1edbi 10 miliv\u00f4n v\u1edbi chi ph\u00ed cao h\u01a1n).<\/p>\n\n <h3>\u0110\u1ed9 ph\u1ee9c t\u1ea1p v\u00e0 chi ph\u00ed \u2014 C\u00e0ng nhi\u1ec1u linh ki\u1ec7n, gi\u00e1 tr\u1ecb c\u00e0ng cao<\/h3>\n\n <p>M\u1ed9t b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) ch\u1ee9a nhi\u1ec1u linh ki\u1ec7n h\u01a1n so v\u1edbi b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh: m\u1ea1ch t\u00edch h\u1ee3p \u0111i\u1ec1u khi\u1ec3n PWM, MOSFET chuy\u1ec3n m\u1ea1ch, bi\u1ebfn \u00e1p t\u1ea7n s\u1ed1 cao, b\u1ed9 ph\u1ea3n h\u1ed3i quang \u0111i\u1ec7n v\u00e0 m\u1ea1ch l\u1ecdc \u0111\u1ea7u ra. Trong khi \u0111\u00f3, b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh ch\u1ec9 c\u1ea7n bi\u1ebfn \u00e1p, b\u1ed9 ch\u1ec9nh l\u01b0u, t\u1ee5 l\u1ecdc v\u00e0 b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p. Tuy nhi\u00ean, s\u1ed1 l\u01b0\u1ee3ng linh ki\u1ec7n kh\u00f4ng \u0111\u1ed3ng ngh\u0129a v\u1edbi chi ph\u00ed. Chi ph\u00ed c\u1ee7a b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh ch\u1ee7 y\u1ebfu \u0111\u1ebfn t\u1eeb \u0111\u1ed3ng v\u00e0 s\u1eaft \u2014 c\u1ee5 th\u1ec3 l\u00e0 bi\u1ebfn \u00e1p t\u1ea7n s\u1ed1 m\u1ea1ng c\u1ed3ng k\u1ec1nh v\u00e0 b\u1ed9 t\u1ea3n nhi\u1ec7t l\u1edbn. Chi ph\u00ed c\u1ee7a SMPS ch\u1ee7 y\u1ebfu \u0111\u1ebfn t\u1eeb c\u00e1c ch\u1ea5t b\u00e1n d\u1eabn, v\u1ed1n ng\u00e0y c\u00e0ng r\u1ebb h\u01a1n m\u1ed7i n\u0103m nh\u1edd quy m\u00f4 s\u1ea3n xu\u1ea5t. D\u01b0\u1edbi m\u1ee9c kho\u1ea3ng 50 watt, c\u00e1c thi\u1ebft b\u1ecb SMPS h\u1ea7u nh\u01b0 lu\u00f4n r\u1ebb h\u01a1n so v\u1edbi c\u00e1c b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. Tr\u00ean 500 watt, b\u1ed9 ngu\u1ed3n tuy\u1ebfn t\u00ednh v\u1eabn c\u00f3 th\u1ec3 c\u1ea1nh tranh v\u1ec1 chi ph\u00ed tr\u00ean c\u01a1 s\u1edf t\u1eebng \u0111\u01a1n v\u1ecb, nh\u01b0ng nh\u01b0\u1ee3c \u0111i\u1ec3m v\u1ec1 tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 hi\u1ec7u su\u1ea5t th\u01b0\u1eddng khi\u1ebfn ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn cho b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb n\u00e0o c\u1ea7n v\u1eadn chuy\u1ec3n ho\u1eb7c v\u1eadn h\u00e0nh li\u00ean t\u1ee5c.<\/p>\n\n <h3>Khi n\u00e0o n\u00ean ch\u1ecdn c\u00e1i n\u00e0o \u2014 H\u01b0\u1edbng d\u1eabn th\u1ef1c t\u1ebf<\/h3>\n\n <p>Sau khi \u0111\u00e3 n\u1eafm v\u1eefng b\u1ed1n kh\u00eda c\u1ea1nh n\u00eau tr\u00ean, \u0111\u00e2y l\u00e0 m\u1ed9t khung quy\u1ebft \u0111\u1ecbnh \u0111\u01a1n gi\u1ea3n:<\/p>\n\n <ul>\n <li><strong>\u1ee8ng d\u1ee5ng c\u1ee7a b\u1ea1n thu\u1ed9c l\u0129nh v\u1ef1c analog ch\u00ednh x\u00e1c, y t\u1ebf hay \u00e2m thanh cao c\u1ea5p?<\/strong> \u2192 H\u00e3y xem x\u00e9t s\u1eed d\u1ee5ng ngu\u1ed3n \u0111i\u1ec7n tuy\u1ebfn t\u00ednh ho\u1eb7c ngu\u1ed3n \u0111i\u1ec7n chuy\u1ec3n m\u1ea1ch (SMPS) chuy\u00ean d\u1ee5ng c\u00f3 \u0111\u1ed9 \u1ed3n c\u1ef1c th\u1ea5p.<\/li>\n <li><strong>C\u00f4ng su\u1ea5t tr\u00ean 500 watt v\u00e0 k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u00f3 th\u1ef1c s\u1ef1 kh\u00f4ng quan tr\u1ecdng kh\u00f4ng?<\/strong> \u2192 Vi\u1ec7c cung c\u1ea5p theo h\u00ecnh th\u1ee9c tuy\u1ebfn t\u00ednh c\u00f3 th\u1ec3 kh\u1ea3 thi, nh\u01b0ng h\u00e3y c\u00e2n nh\u1eafc k\u1ef9 chi ph\u00ed v\u1eadn chuy\u1ec3n v\u00e0 chi ph\u00ed l\u00e0m m\u00e1t tr\u01b0\u1edbc khi \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh.<\/li>\n <li><strong>C\u00f2n nh\u1eefng th\u1ee9 kh\u00e1c th\u00ec sao?<\/strong> \u2192 B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) g\u1ea7n nh\u01b0 ch\u1eafc ch\u1eafn l\u00e0 gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng, t\u1ee7 \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p, h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng LED, thi\u1ebft b\u1ecb vi\u1ec5n th\u00f4ng, b\u1ed9 s\u1ea1c pin v\u00e0 ph\u1ea7n l\u1edbn c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed hi\u1ec7n \u0111\u1ea1i.<\/li>\n <\/ul>\n\n <div class=\"table-wrapper\">\n <table>\n <thead><tr><th>\u1ee8ng d\u1ee5ng<\/th><th>Lo\u1ea1i \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng (b\u1ed9 s\u1ea1c, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i)<\/td><td>SMPS<\/td><\/tr>\n <tr><td>\u0110i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p (PLC, c\u1ea3m bi\u1ebfn, r\u01a1-le)<\/td><td>SMPS \u2014 Thanh DIN<\/td><\/tr>\n <tr><td>B\u1ed9 ngu\u1ed3n ch\u00ednh x\u00e1c d\u00f9ng trong ph\u00f2ng th\u00ed nghi\u1ec7m<\/td><td>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch tuy\u1ebfn t\u00ednh ho\u1eb7c si\u00eau \u00edt nhi\u1ec5u (SMPS)<\/td><\/tr>\n <tr><td>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u00e8n LED<\/td><td>SMPS \u2014 d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i<\/td><\/tr>\n <tr><td>B\u1ed9 khu\u1ebfch \u0111\u1ea1i \u00e2m thanh cao c\u1ea5p<\/td><td>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch tuy\u1ebfn t\u00ednh ho\u1eb7c c\u1ed9ng h\u01b0\u1edfng (SMPS)<\/td><\/tr>\n <tr><td>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 CNC (c\u00f4ng su\u1ea5t cao)<\/td><td>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch tuy\u1ebfn t\u00ednh ho\u1eb7c c\u00f4ng nghi\u1ec7p (SMPS) kh\u00f4ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u1ed9t bi\u1ebfn \u0111i\u1ec7n \u00e1p<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <h2>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n\n <p>M\u1ecdi b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS), b\u1ea5t k\u1ec3 c\u1ea5u tr\u00fac c\u1ee5 th\u1ec3 c\u1ee7a n\u00f3 l\u00e0 g\u00ec, \u0111\u1ec1u tu\u00e2n theo c\u00f9ng m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u g\u1ed3m n\u0103m giai \u0111o\u1ea1n. Vi\u1ec7c hi\u1ec3u r\u00f5 chu\u1ed7i n\u00e0y s\u1ebd gi\u00fap b\u1ea1n th\u1ea5y \u0111\u01b0\u1ee3c c\u00e1ch m\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u1ecf g\u1ecdn chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n \u0111i\u1ec7n xoay chi\u1ec1u (AC) kh\u00f4ng \u1ed5n \u0111\u1ecbnh t\u1eeb \u1ed5 c\u1eafm t\u01b0\u1eddng th\u00e0nh ngu\u1ed3n \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 cung c\u1ea5p cho c\u00e1c thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh t\u1eeb \u1ed5 c\u1eafm t\u01b0\u1eddng \u0111\u1ebfn \u0111\u1ea7u ra \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh.<\/p>\n\n <h3>Giai \u0111o\u1ea1n 1 \u2014 Ch\u1ec9nh l\u01b0u v\u00e0 l\u1ecdc t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o<\/h3>\n\n <p>Nhi\u1ec7m v\u1ee5 \u0111\u1ea7u ti\u00ean l\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u th\u00e0nh d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u. M\u1ed9t b\u1ed9 ch\u1ec9nh l\u01b0u c\u1ea7u \u2014 g\u1ed3m b\u1ed1n \u0111i\u1ed1t x\u1ebfp th\u00e0nh c\u1ea7u \u2014 bi\u1ebfn n\u1eeda chu k\u1ef3 \u00e2m c\u1ee7a d\u1ea1ng s\u00f3ng xoay chi\u1ec1u th\u00e0nh c\u1ef1c d\u01b0\u01a1ng, t\u1ea1o ra m\u1ed9t chu\u1ed7i c\u00e1c xung \u0111\u01a1n h\u01b0\u1edbng. Sau \u0111\u00f3, m\u1ed9t t\u1ee5 \u0111i\u1ec7n ph\u00e2n l\u1edbn s\u1ebd l\u00e0m m\u1ecbn c\u00e1c xung n\u00e0y th\u00e0nh m\u1ed9t \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh. \u0110\u1ed1i v\u1edbi ngu\u1ed3n \u0111\u1ea7u v\u00e0o AC 220 volt, giai \u0111o\u1ea1n n\u00e0y t\u1ea1o ra kho\u1ea3ng 311 volt DC, \u0111\u00e2y l\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u1ec9nh c\u1ee7a s\u00f3ng sin (220 \u00d7 \u221a2). Trong c\u00e1c thi\u1ebft k\u1ebf SMPS hi\u1ec7n \u0111\u1ea1i, m\u1ed9t giai \u0111o\u1ea1n hi\u1ec7u ch\u1ec9nh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t ch\u1ee7 \u0111\u1ed9ng (PFC) th\u01b0\u1eddng n\u1eb1m gi\u1eefa b\u1ed9 ch\u1ec9nh l\u01b0u v\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i ch\u00ednh, \u0111\u1ecbnh h\u00ecnh d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7u v\u00e0o \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi d\u1ea1ng s\u00f3ng \u0111i\u1ec7n \u00e1p v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t \u1edf c\u1ea5p l\u01b0\u1edbi \u0111i\u1ec7n.<\/p>\n\n <h3>Giai \u0111o\u1ea1n 2 \u2014 Chuy\u1ec3n m\u1ea1ch t\u1ea7n s\u1ed1 cao<\/h3>\n\n <p>\u0110\u00e2y ch\u00ednh l\u00e0 giai \u0111o\u1ea1n \u0111\u00e3 \u0111\u1eb7t t\u00ean cho b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch. M\u1ed9t MOSFET c\u00f4ng su\u1ea5t, \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi b\u1ed9 \u0111i\u1ec1u khi\u1ec3n PWM (\u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung), chia d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) \u1ed5n \u0111\u1ecbnh c\u00f3 \u0111i\u1ec7n \u00e1p cao th\u00e0nh m\u1ed9t chu\u1ed7i c\u00e1c xung t\u1ea7n s\u1ed1 cao. Trong c\u00e1c ngu\u1ed3n \u0111i\u1ec7n c\u00f4ng nghi\u1ec7p, t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng t\u1eeb 50 \u0111\u1ebfn 200 kilohertz. C\u00e1c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i nh\u1ecf g\u1ecdn s\u1eed d\u1ee5ng transistor nitrua gali (GaN) c\u00f3 th\u1ec3 v\u01b0\u1ee3t qua m\u1ed1c 1 megahertz.<\/p>\n\n <p>Bi\u1ebfn s\u1ed1 quan tr\u1ecdng nh\u1ea5t l\u00e0 chu k\u1ef3 l\u00e0m vi\u1ec7c: t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m th\u1eddi gian m\u00e0 MOSFET \u1edf tr\u1ea1ng th\u00e1i \u201cb\u1eadt\u201d trong m\u1ed7i chu k\u1ef3 chuy\u1ec3n m\u1ea1ch. N\u1ebfu \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra c\u1ea7n t\u0103ng, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n s\u1ebd m\u1edf r\u1ed9ng \u0111\u1ed9 r\u1ed9ng xung (chu k\u1ef3 l\u00e0m vi\u1ec7c cao h\u01a1n). N\u1ebfu c\u1ea7n gi\u1ea3m, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n s\u1ebd thu h\u1eb9p \u0111\u1ed9 r\u1ed9ng xung. Ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ebf \u0111\u1ed9 r\u1ed9ng xung (PWM) n\u00e0y ch\u00ednh l\u00e0 c\u00e1ch m\u00e0 SMPS \u0111i\u1ec1u ch\u1ec9nh \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra m\u00e0 kh\u00f4ng g\u00e2y l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng. B\u1ea3n th\u00e2n MOSFET 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 b\u1eb1ng kh\u00f4ng), do \u0111\u00f3 n\u00f3 h\u1ea7u nh\u01b0 kh\u00f4ng ti\u00eau t\u00e1n c\u00f4ng su\u1ea5t \u1edf c\u1ea3 hai tr\u1ea1ng th\u00e1i n\u00e0y.<\/p>\n\n <h3>Giai \u0111o\u1ea1n 3 \u2014 Bi\u1ebfn \u0111\u1ed5i t\u1ea7n s\u1ed1 cao<\/h3>\n\n <p>D\u00f2ng xung t\u1ea7n s\u1ed1 cao gi\u1edd \u0111\u00e2y \u0111i v\u00e0o m\u1ed9t cu\u1ed9n bi\u1ebfn \u00e1p l\u00f5i ferit nh\u1ecf. Hai qu\u00e1 tr\u00ecnh di\u1ec5n ra \u0111\u1ed3ng th\u1eddi t\u1ea1i \u0111\u00e2y. Th\u1ee9 nh\u1ea5t, cu\u1ed9n bi\u1ebfn \u00e1p t\u0103ng ho\u1eb7c gi\u1ea3m \u0111i\u1ec7n \u00e1p t\u00f9y theo t\u1ef7 s\u1ed1 v\u00f2ng cu\u1ed9n. V\u00ed d\u1ee5, t\u1ef7 s\u1ed1 cu\u1ed9n d\u00e2y 10:1 s\u1ebd chuy\u1ec3n \u0111\u1ed5i c\u00e1c xung 310 volt th\u00e0nh c\u00e1c xung 31 volt. Th\u1ee9 hai, m\u00e1y bi\u1ebfn \u00e1p \u0111\u1ea3m b\u1ea3o c\u00e1ch ly \u0111i\u1ec7n: ph\u00eda \u0111\u1ea7u v\u00e0o (\u0111\u1ea5t \u201cn\u00f3ng\u201d, tham chi\u1ebfu \u0111\u1ebfn ngu\u1ed3n \u0111i\u1ec7n l\u01b0\u1edbi) v\u00e0 ph\u00eda \u0111\u1ea7u ra (\u0111\u1ea5t \u201cl\u1ea1nh\u201d, tham chi\u1ebfu \u0111\u1ebfn thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n) \u0111\u01b0\u1ee3c t\u00e1ch bi\u1ec7t v\u1ec1 m\u1eb7t \u0111i\u1ec7n, th\u01b0\u1eddng c\u00f3 m\u1ee9c c\u00e1ch ly t\u1eeb 1.500 \u0111\u1ebfn 3.000 volt AC. Ch\u00ednh s\u1ef1 c\u00e1ch ly n\u00e0y gi\u00fap SMPS an to\u00e0n khi ch\u1ea1m v\u00e0o ph\u00eda \u0111\u1ea7u ra ngay c\u1ea3 khi \u0111\u01b0\u1ee3c c\u1eafm v\u00e0o ngu\u1ed3n \u0111i\u1ec7n l\u01b0\u1edbi.<\/p>\n\n <p>L\u00f5i ferit ch\u00ednh l\u00e0 y\u1ebfu t\u1ed1 gi\u00fap m\u00e1y bi\u1ebfn \u00e1p c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf nh\u01b0 v\u1eady. \u1ede t\u1ea7n s\u1ed1 50 hertz, l\u00f5i m\u00e1y bi\u1ebfn \u00e1p ph\u1ea3i t\u00edch tr\u1eef n\u0103ng l\u01b0\u1ee3ng trong 10 mili gi\u00e2y cho m\u1ed7i n\u1eeda chu k\u1ef3, do \u0111\u00f3 c\u1ea7n m\u1ed9t l\u01b0\u1ee3ng l\u1edbn v\u1eadt li\u1ec7u t\u1eeb t\u00ednh. \u1ede t\u1ea7n s\u1ed1 100 kilohertz, m\u1ed7i chu k\u1ef3 truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng ch\u1ec9 k\u00e9o d\u00e0i 5 micro gi\u00e2y. Ch\u1ec9 c\u1ea7n m\u1ed9t ph\u1ea7n nh\u1ecf v\u1eadt li\u1ec7u l\u00e0 \u0111\u1ee7 \u0111\u1ec3 x\u1eed l\u00fd c\u00f9ng m\u1ed9t c\u00f4ng su\u1ea5t.<\/p>\n\n <h3>Giai \u0111o\u1ea1n 4 \u2014 Ch\u1ec9nh l\u01b0u v\u00e0 l\u1ecdc t\u00edn hi\u1ec7u \u0111\u1ea7u ra<\/h3>\n\n <p>\u0110\u1ea7u ra c\u1ee7a m\u00e1y bi\u1ebfn \u00e1p l\u00e0 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u t\u1ea7n s\u1ed1 cao, ch\u01b0a ph\u1ea3i l\u00e0 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c. M\u1ed9t giai \u0111o\u1ea1n ch\u1ec9nh l\u01b0u th\u1ee9 hai s\u1ebd chuy\u1ec3n \u0111\u1ed5i n\u00f3 tr\u1edf l\u1ea1i. Kh\u00f4ng gi\u1ed1ng nh\u01b0 b\u1ed9 ch\u1ec9nh l\u01b0u \u0111\u1ea7u v\u00e0o, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c \u0111i\u1ed1t silicon th\u00f4ng th\u01b0\u1eddng, giai \u0111o\u1ea1n n\u00e0y y\u00eau c\u1ea7u c\u00e1c \u0111i\u1ed1t Schottky ho\u1eb7c \u0111i\u1ed1t ph\u1ee5c h\u1ed3i nhanh \u2014 c\u00e1c linh ki\u1ec7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 chuy\u1ec3n m\u1ea1ch \u1edf t\u1ed1c \u0111\u1ed9 cao m\u00e0 kh\u00f4ng l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i. M\u1ed9t \u0111i\u1ed1t silicon ti\u00eau chu\u1ea9n c\u1ed1 g\u1eafng ch\u1ec9nh l\u01b0u c\u00e1c xung 100 kilohertz s\u1ebd m\u1ea5t qu\u00e1 nhi\u1ec1u th\u1eddi gian trong giai \u0111o\u1ea1n ph\u1ee5c h\u1ed3i, t\u1ea1o ra nhi\u1ec7t \u0111\u00e1ng k\u1ec3.<\/p>\n\n <p>Sau khi ch\u1ec9nh l\u01b0u, b\u1ed9 l\u1ecdc LC (k\u1ebft h\u1ee3p gi\u1eefa cu\u1ed9n c\u1ea3m v\u00e0 t\u1ee5 \u0111i\u1ec7n) l\u00e0m m\u1ecbn d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7u ra th\u00e0nh d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) s\u1ea1ch. Cu\u1ed9n c\u1ea3m gi\u00fap ch\u1ed1ng l\u1ea1i nh\u1eefng thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t c\u1ee7a d\u00f2ng \u0111i\u1ec7n, trong khi t\u1ee5 \u0111i\u1ec7n h\u1ea5p th\u1ee5 c\u00e1c dao \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p. Khi k\u1ebft h\u1ee3p v\u1edbi nhau, ch\u00fang l\u00e0m gi\u1ea3m \u0111\u1ed9 g\u1ee3n do t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch xu\u1ed1ng m\u1ee9c ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c cho \u1ee9ng d\u1ee5ng m\u1ee5c ti\u00eau.<\/p>\n\n <h3>Giai \u0111o\u1ea1n 5 \u2014 Ph\u1ea3n h\u1ed3i v\u00e0 v\u00f2ng \u0111i\u1ec1u ch\u1ec9nh<\/h3>\n\n <p>B\u1ed1n giai \u0111o\u1ea1n n\u00eau tr\u00ean s\u1ebd t\u1ea1o ra m\u1ed9t t\u00edn hi\u1ec7u \u0111\u1ea7u ra DC th\u00f4 c\u00f3 gi\u00e1 tr\u1ecb dao \u0111\u1ed9ng theo s\u1ef1 thay \u0111\u1ed5i c\u1ee7a t\u1ea3i v\u00e0 bi\u1ebfn \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o. V\u00f2ng ph\u1ea3n h\u1ed3i gi\u00fap h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng kh\u00e9p k\u00edn v\u00e0 cho ph\u00e9p th\u1ef1c hi\u1ec7n vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh.<\/p>\n\n <p>M\u1ed9t ngu\u1ed3n tham chi\u1ebfu \u0111i\u1ec7n \u00e1p ch\u00ednh x\u00e1c (th\u01b0\u1eddng l\u00e0 b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh shunt c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh TL431 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t \u1edf m\u1ee9c 2,5 volt) cung c\u1ea5p m\u1ed9t \u0111i\u1ec3m so s\u00e1nh \u1ed5n \u0111\u1ecbnh. M\u1ed9t b\u1ed9 chia \u0111i\u1ec7n tr\u1edf l\u1ea5y m\u1eabu \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra v\u00e0 truy\u1ec1n n\u00f3 \u0111\u1ebfn b\u1ed9 khu\u1ebfch \u0111\u1ea1i sai s\u1ed1, b\u1ed9 n\u00e0y so s\u00e1nh m\u1eabu v\u1edbi ngu\u1ed3n tham chi\u1ebfu v\u00e0 t\u1ea1o ra t\u00edn hi\u1ec7u hi\u1ec7u ch\u1ec9nh. T\u00edn hi\u1ec7u n\u00e0y v\u01b0\u1ee3t qua ranh gi\u1edbi c\u00e1ch ly th\u00f4ng qua m\u1ed9t b\u1ed9 gh\u00e9p quang \u2014 m\u1ed9t thi\u1ebft b\u1ecb truy\u1ec1n th\u00f4ng tin qua \u00e1nh s\u00e1ng, duy tr\u00ec r\u00e0o c\u1ea3n an to\u00e0n gi\u1eefa ph\u00eda \u0111\u1ea7u ra v\u00e0 ph\u00eda \u0111\u1ea7u v\u00e0o. \u1ede ph\u00eda s\u01a1 c\u1ea5p, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n PWM \u0111\u1ecdc t\u00edn hi\u1ec7u hi\u1ec7u ch\u1ec9nh v\u00e0 \u0111i\u1ec1u ch\u1ec9nh chu k\u1ef3 l\u00e0m vi\u1ec7c cho ph\u00f9 h\u1ee3p. To\u00e0n b\u1ed9 v\u00f2ng l\u1eb7p ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c, th\u01b0\u1eddng \u1edf b\u0103ng th\u00f4ng t\u1eeb 1\/5 \u0111\u1ebfn 1\/10 t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch, \u0111\u1ea3m b\u1ea3o \u0111\u1ea7u ra lu\u00f4n \u0111\u01b0\u1ee3c kh\u00f3a \u1edf \u0111i\u1ec7n \u00e1p m\u1ee5c ti\u00eau b\u1ea5t k\u1ec3 s\u1ef1 thay \u0111\u1ed5i c\u1ee7a t\u1ea3i.<\/p>\n\n <!-- BP-2: 5-Stage Signal Flow -->\n <div class=\"bp-2-signal-flow bd-reveal\">\n <div class=\"bp-2-flow\">\n <div class=\"bp-2-stage\">\n <div class=\"bp-2-num\">1<\/div>\n <div class=\"bp-2-title\">Ch\u1ec9nh l\u01b0u \u0111\u1ea7u v\u00e0o<\/div>\n <div class=\"bp-2-desc\">Chuy\u1ec3n \u0111\u1ed5i t\u1eeb AC sang DC th\u00f4 th\u00f4ng qua c\u1ea7u ch\u1ec9nh l\u01b0u + t\u1ee5 \u0111i\u1ec7n<\/div>\n <\/div>\n <div class=\"bp-2-arrow\"><svg width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><line x1=\"5\" y1=\"12\" x2=\"19\" y2=\"12\"\/><polyline points=\"12 5 19 12 12 19\"\/><\/svg><\/div>\n <div class=\"bp-2-stage\">\n <div class=\"bp-2-num\">2<\/div>\n <div class=\"bp-2-title\">Chuy\u1ec3n m\u1ea1ch t\u1ea7n s\u1ed1 cao<\/div>\n <div class=\"bp-2-desc\">MOSFET c\u1eaft d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u \u1edf t\u1ea7n s\u1ed1 50\u2013200 kHz<\/div>\n <\/div>\n <div class=\"bp-2-arrow\"><svg width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><line x1=\"5\" y1=\"12\" x2=\"19\" y2=\"12\"\/><polyline points=\"12 5 19 12 12 19\"\/><\/svg><\/div>\n <div class=\"bp-2-stage\">\n <div class=\"bp-2-num\">3<\/div>\n <div class=\"bp-2-title\">Chuy\u1ec3n \u0111\u1ed5i<\/div>\n <div class=\"bp-2-desc\">L\u00f5i ferit gi\u00fap \u1ed5n \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p v\u00e0 c\u00e1ch ly<\/div>\n <\/div>\n <div class=\"bp-2-arrow\"><svg width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><line x1=\"5\" y1=\"12\" x2=\"19\" y2=\"12\"\/><polyline points=\"12 5 19 12 12 19\"\/><\/svg><\/div>\n <div class=\"bp-2-stage\">\n <div class=\"bp-2-num\">4<\/div>\n <div class=\"bp-2-title\">L\u1ecdc \u0111\u1ea7u ra<\/div>\n <div class=\"bp-2-desc\">\u0110i\u1ed1t Schottky + b\u1ed9 l\u1ecdc LC gi\u00fap l\u00e0m m\u1ecbn t\u00edn hi\u1ec7u \u0111\u1ea7u ra<\/div>\n <\/div>\n <div class=\"bp-2-arrow\"><svg width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><line x1=\"5\" y1=\"12\" x2=\"19\" y2=\"12\"\/><polyline points=\"12 5 19 12 12 19\"\/><\/svg><\/div>\n <div class=\"bp-2-stage\">\n <div class=\"bp-2-num\">5<\/div>\n <div class=\"bp-2-title\">\u0110i\u1ec1u ch\u1ec9nh ph\u1ea3n h\u1ed3i<\/div>\n <div class=\"bp-2-desc\">B\u1ed9 gh\u00e9p quang + PWM kh\u00f3a \u0111i\u1ec7n \u00e1p<\/div>\n <\/div>\n <\/div>\n <\/div>\n\n <h2>C\u00e1c lo\u1ea1i b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch ph\u1ed5 bi\u1ebfn<\/h2>\n\n <p>Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf gi\u1ed1ng nhau. C\u1ea5u tr\u00fac \u2014 t\u1ee9c l\u00e0 c\u00e1ch b\u1ed1 tr\u00ed c\u1ee5 th\u1ec3 c\u1ee7a c\u00e1c c\u00f4ng t\u1eafc, bi\u1ebfn \u00e1p v\u00e0 c\u00e1c linh ki\u1ec7n l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng \u2014 quy\u1ebft \u0111\u1ecbnh d\u1ea3i c\u00f4ng su\u1ea5t, m\u1ee9c hi\u1ec7u su\u1ea5t t\u1ed1i \u0111a, chi ph\u00ed v\u00e0 m\u1ee9c \u0111\u1ed9 ph\u00f9 h\u1ee3p c\u1ee7a b\u1ed9 ngu\u1ed3n \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau. S\u1ef1 ph\u00e2n lo\u1ea1i ch\u00ednh l\u00e0 gi\u1eefa c\u00e1c c\u1ea5u tr\u00fac kh\u00f4ng c\u00e1ch ly \u2014 chuy\u1ec3n \u0111\u1ed5i DC sang DC m\u00e0 kh\u00f4ng c\u1ea7n bi\u1ebfn \u00e1p \u2014 v\u00e0 c\u00e1c c\u1ea5u tr\u00fac c\u00e1ch ly \u2014 s\u1eed d\u1ee5ng bi\u1ebfn \u00e1p cho c\u1ea3 vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n \u00e1p l\u1eabn c\u00e1ch ly an to\u00e0n.<\/p>\n\n <div class=\"table-wrapper\">\n <table>\n <thead><tr><th>T\u00f4 p\u00f4<\/th><th>Lo\u1ea1i<\/th><th>D\u1ea3i \u0111i\u1ec7n \u00e1p<\/th><th>\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th><th>M\u00f4 t\u1ea3 trong m\u1ed9t c\u00e2u<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Buck<\/td><td>Bi\u1ebfn \u00e1p h\u1ea1 \u00e1p kh\u00f4ng c\u00e1ch ly<\/td><td>T\u1ed1i \u0111a 100W<\/td><td>M\u1ea1ch chuy\u1ec3n \u0111\u1ed5i DC-DC c\u1ea5p bo m\u1ea1ch, m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111\u00e8n LED<\/td><td>C\u1ea5u tr\u00fac m\u1ea1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t; \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra lu\u00f4n th\u1ea5p h\u01a1n \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o<\/td><\/tr>\n <tr><td>T\u0103ng c\u01b0\u1eddng<\/td><td>Bi\u1ebfn \u00e1p t\u0103ng \u00e1p kh\u00f4ng c\u00e1ch ly<\/td><td>T\u1ed1i \u0111a 100W<\/td><td>B\u1ed9 t\u0103ng \u00e1p ch\u1ea1y b\u1eb1ng pin, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u00e8n n\u1ec1n<\/td><td>\u0110i\u1ec7n \u00e1p \u0111\u1ea7u ra lu\u00f4n cao h\u01a1n \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o<\/td><\/tr>\n <tr><td>Flyback<\/td><td>B\u1ecb c\u00f4 l\u1eadp<\/td><td>T\u1ed1i \u0111a 150W<\/td><td>B\u1ed9 s\u1ea1c \u0111i\u1ec7n tho\u1ea1i, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i nh\u1ecf, ph\u1ee5 ki\u1ec7n \u0111i k\u00e8m<\/td><td>C\u1ea5u tr\u00fac m\u1ea1ng c\u00f4 l\u1eadp ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u00e0 ti\u1ebft ki\u1ec7m nh\u1ea5t<\/td><\/tr>\n <tr><td>Ti\u1ec1n \u0111\u1ea1o<\/td><td>B\u1ecb c\u00f4 l\u1eadp<\/td><td>100\u2013350 W<\/td><td>B\u1ed9 ngu\u1ed3n PLC, \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p<\/td><td>Hi\u1ec7u su\u1ea5t cao h\u01a1n v\u00e0 \u0111\u1ed9 g\u1ee3n th\u1ea5p h\u01a1n so v\u1edbi m\u1ea1ch flyback<\/td><\/tr>\n <tr><td>C\u1ea7u n\u1eeda ho\u1eb7c c\u1ea7u to\u00e0n ph\u1ea7n<\/td><td>B\u1ecb c\u00f4 l\u1eadp<\/td><td>350 W\u20135 kW+<\/td><td>B\u1ed9 ngu\u1ed3n cho m\u00e1y ch\u1ee7, ngu\u1ed3n \u0111i\u1ec7n c\u00f4ng nghi\u1ec7p, m\u1ea1 \u0111i\u1ec7n<\/td><td>Thi\u1ebft b\u1ecb ch\u1ee7 l\u1ef1c cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng su\u1ea5t cao<\/td><\/tr>\n <tr><td>C\u00f4ng ty TNHH Resonant<\/td><td>B\u1ecb c\u00f4 l\u1eadp<\/td><td>200 W\u20133 kW<\/td><td>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i hi\u1ec7u su\u1ea5t cao, ngu\u1ed3n \u0111i\u1ec7n cho m\u00e0n h\u00ecnh LED<\/td><td>Hi\u1ec7u su\u1ea5t c\u1ef1c cao v\u1edbi m\u1ee9c nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) v\u1ed1n \u0111\u00e3 th\u1ea5p<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>\u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p (cung c\u1ea5p \u0111i\u1ec7n cho PLC, c\u1ea3m bi\u1ebfn, r\u01a1le v\u00e0 c\u00f4ng t\u1eafc t\u01a1 t\u1eeb t\u1ee7 \u0111i\u1ec1u khi\u1ec3n), b\u1ed9 ngu\u1ed3n 24 volt g\u1eafn tr\u00ean thanh DIN m\u00e0 b\u1ea1n th\u01b0\u1eddng g\u1eb7p r\u1ea5t c\u00f3 th\u1ec3 l\u00e0 lo\u1ea1i thi\u1ebft k\u1ebf m\u1ea1ch \u0111\u01a1n h\u01b0\u1edbng (forward) ho\u1eb7c m\u1ea1ch h\u1ed3i l\u01b0u (flyback), v\u1edbi c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c n\u1eb1m trong kho\u1ea3ng t\u1eeb 30 \u0111\u1ebfn 480 watt.<\/p>\n\n <h2>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf \u0111\u00e2u?<\/h2>\n\n <p>C\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u0111\u00e3 tr\u1edf n\u00ean g\u1eafn b\u00f3 s\u00e2u s\u1eafc v\u1edbi cu\u1ed9c s\u1ed1ng hi\u1ec7n \u0111\u1ea1i \u0111\u1ebfn m\u1ee9c b\u1ea1n ti\u1ebfp x\u00fac v\u1edbi h\u00e0ng ch\u1ee5c thi\u1ebft b\u1ecb nh\u01b0 v\u1eady m\u1ed7i ng\u00e0y m\u00e0 kh\u00f4ng h\u1ec1 hay bi\u1ebft. Ch\u00fang cung c\u1ea5p \u0111i\u1ec7n cho nh\u1eefng thi\u1ebft b\u1ecb d\u1ec5 nh\u1eadn th\u1ea5y \u2014 b\u1ed9 s\u1ea1c \u0111i\u1ec7n tho\u1ea1i, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n cho m\u00e1y t\u00ednh x\u00e1ch tay, tivi v\u00e0 b\u1ed9 ngu\u1ed3n m\u00e1y t\u00ednh \u0111\u1ec3 b\u00e0n \u2014 nh\u01b0ng ph\u1ea1m vi \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang c\u00f2n v\u01b0\u01a1n xa h\u01a1n nhi\u1ec1u so v\u1edbi l\u0129nh v\u1ef1c \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng.<\/p>\n\n <p>Trong t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p, c\u00e1c b\u1ed9 ngu\u1ed3n SMPS ch\u00ednh l\u00e0 x\u01b0\u01a1ng s\u1ed1ng th\u1ea7m l\u1eb7ng c\u1ee7a m\u1ecdi t\u1ee7 \u0111i\u1ec1u khi\u1ec3n. M\u1ed9t d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m h\u00e0ng ch\u1ee5c b\u1ed9 ngu\u1ed3n DC 24 volt l\u1eafp tr\u00ean thanh DIN, m\u1ed7i b\u1ed9 cung c\u1ea5p \u0111i\u1ec7n cho m\u1ed9t m\u1ea1ng l\u01b0\u1edbi g\u1ed3m c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n logic l\u1eadp tr\u00ecnh (PLC), c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n v\u00e0 c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn, \u0111\u00e8n b\u00e1o hi\u1ec7u, r\u01a1-le, c\u00f4ng t\u1eafc t\u01a1 v\u00e0 b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n giao di\u1ec7n ng\u01b0\u1eddi-m\u00e1y (HMI). \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 nh\u1eefng thi\u1ebft b\u1ecb \u0111\u1ed9c l\u1eadp ho\u1ea1t \u0111\u1ed9ng t\u00e1ch bi\u1ec7t. Ch\u00fang t\u1ea1o th\u00e0nh m\u1ed9t h\u1ec7 sinh th\u00e1i li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd, trong \u0111\u00f3 m\u1ed7i th\u00e0nh ph\u1ea7n \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o ngu\u1ed3n \u0111i\u1ec7n s\u1ea1ch v\u00e0 \u1ed5n \u0111\u1ecbnh \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady. Ch\u1ec9 c\u1ea7n m\u1ed9t b\u1ed9 ngu\u1ed3n kh\u00f4ng \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt ho\u1eb7c b\u1ecb h\u1ecfng c\u0169ng c\u00f3 th\u1ec3 khi\u1ebfn to\u00e0n b\u1ed9 d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t ph\u1ea3i ng\u1eebng ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n <p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng vi\u1ec5n th\u00f4ng v\u1eadn h\u00e0nh d\u1ef1a tr\u00ean c\u00f4ng ngh\u1ec7 SMPS \u1edf quy m\u00f4 c\u00f2n l\u1edbn h\u01a1n n\u1eefa. C\u00e1c tr\u1ea1m g\u1ed1c m\u1ea1ng di \u0111\u1ed9ng, gi\u00e1 \u0111\u1ee1 m\u00e1y ch\u1ee7 trong trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 c\u00e1c n\u00fat m\u1ea1ng c\u00e1p quang \u0111\u1ec1u s\u1eed d\u1ee5ng b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch hi\u1ec7u su\u1ea5t cao \u2014 th\u01b0\u1eddng c\u00f3 c\u01a1 ch\u1ebf d\u1ef1 ph\u00f2ng N+1 \u2014 \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n l\u01b0\u1edbi ho\u1eb7c ngu\u1ed3n d\u1ef1 ph\u00f2ng t\u1eeb pin th\u00e0nh c\u00e1c \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u (DC) \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh ch\u1eb7t ch\u1ebd theo y\u00eau c\u1ea7u c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n\n <p>C\u00e1c bi\u1ebfn th\u1ec3 SMPS chuy\u00ean d\u1ee5ng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong chi\u1ebfu s\u00e1ng LED (b\u1ed9 \u0111i\u1ec1u khi\u1ec3n d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i cho m\u00e0n h\u00ecnh hi\u1ec3n th\u1ecb v\u00e0 \u0111\u00e8n \u0111\u01b0\u1eddng), s\u1ea1c xe \u0111i\u1ec7n (b\u1ed9 s\u1ea1c tr\u00ean xe v\u00e0 tr\u1ea1m s\u1ea1c nhanh DC), c\u0169ng nh\u01b0 thi\u1ebft b\u1ecb y t\u1ebf (ngu\u1ed3n \u0111i\u1ec7n c\u00f3 c\u00e1ch ly t\u0103ng c\u01b0\u1eddng v\u00e0 d\u00f2ng r\u00f2 c\u1ef1c th\u1ea5p). M\u1ed7i l\u0129nh v\u1ef1c n\u00e0y \u0111\u1ec1u \u0111\u1eb7t ra nh\u1eefng y\u00eau c\u1ea7u ri\u00eang v\u1ec1 hi\u1ec7u su\u1ea5t, c\u00e1ch ly an to\u00e0n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u1ef1ng m\u00f4i tr\u01b0\u1eddng \u2014 \u0111\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao vi\u1ec7c n\u1eafm v\u1eefng nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 c\u00e1c ti\u00eau ch\u00ed c\u1ea7n xem x\u00e9t khi l\u1ef1a ch\u1ecdn b\u1ed9 ngu\u1ed3n tr\u1edf n\u00ean r\u1ea5t quan tr\u1ecdng, ngay c\u1ea3 khi b\u1ea1n kh\u00f4ng ph\u1ea3i l\u00e0 k\u1ef9 s\u01b0 \u0111i\u1ec7n.<\/p>\n\n <h2>Nh\u1eefng y\u1ebfu t\u1ed1 c\u1ea7n l\u01b0u \u00fd khi l\u1ef1a ch\u1ecdn b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch<\/h2>\n\n <p>Hi\u1ec3u SMPS l\u00e0 g\u00ec v\u00e0 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 l\u00e0 m\u1ed9t chuy\u1ec7n. Bi\u1ebft \u0111\u01b0\u1ee3c \u0111i\u1ec1u g\u00ec ph\u00e2n bi\u1ec7t m\u1ed9t thi\u1ebft b\u1ecb \u0111\u00e1ng tin c\u1eady v\u1edbi m\u1ed9t thi\u1ebft b\u1ecb hay g\u1eb7p s\u1ef1 c\u1ed1 l\u1ea1i l\u00e0 chuy\u1ec7n kh\u00e1c \u2014 v\u00e0 \u0111\u00e2y ch\u00ednh l\u00e0 c\u00e2u h\u1ecfi quan tr\u1ecdng nh\u1ea5t khi b\u1ea1n ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 vi\u1ec7c mua s\u1eafm, t\u00edch h\u1ee3p h\u1ec7 th\u1ed1ng ho\u1eb7c b\u1ea3o tr\u00ec. B\u1ed1n kh\u00eda c\u1ea1nh d\u01b0\u1edbi \u0111\u00e2y bao qu\u00e1t c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 tin c\u1eady, kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u00e0 chi ph\u00ed d\u00e0i h\u1ea1n, m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i c\u00f3 b\u1eb1ng k\u1ef9 s\u01b0 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1.<\/p>\n\n <h3>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra \u2014 Nh\u1eefng y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c<\/h3>\n\n <p>X\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1ec1 \u0111i\u1ec7n l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean. N\u1ebfu c\u00e1c th\u00f4ng s\u1ed1 n\u00e0y sai, m\u1ecdi th\u1ee9 kh\u00e1c \u0111\u1ec1u tr\u1edf n\u00ean v\u00f4 ngh\u0129a. H\u00e3y b\u1eaft \u0111\u1ea7u t\u1eeb \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o: n\u1ebfu thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c tri\u1ec3n khai \u1edf nhi\u1ec1u khu v\u1ef1c kh\u00e1c nhau, h\u00e3y ch\u1ec9 \u0111\u1ecbnh d\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o ph\u1ed5 qu\u00e1t t\u1eeb 100 \u0111\u1ebfn 240 volt AC, \u0111\u1ec3 c\u00f3 th\u1ec3 t\u01b0\u01a1ng th\u00edch v\u1edbi l\u01b0\u1edbi \u0111i\u1ec7n 120 volt c\u1ee7a B\u1eafc M\u1ef9 v\u00e0 230 volt c\u1ee7a ch\u00e2u \u00c1\/ch\u00e2u \u00c2u m\u00e0 kh\u00f4ng c\u1ea7n s\u1eeda \u0111\u1ed5i. \u0110\u1ed1i v\u1edbi c\u00e1c khu v\u1ef1c c\u00f3 ngu\u1ed3n \u0111i\u1ec7n l\u01b0\u1edbi kh\u00f4ng \u1ed5n \u0111\u1ecbnh, h\u00e3y t\u00ecm ngu\u1ed3n \u0111i\u1ec7n c\u00f3 d\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o r\u1ed9ng (m\u1ed9t s\u1ed1 ngu\u1ed3n \u0111i\u1ec7n c\u00f4ng nghi\u1ec7p ch\u1ea5p nh\u1eadn t\u1eeb 85 \u0111\u1ebfn 264 volt AC) \u0111\u1ec3 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng ngay c\u1ea3 khi \u0111i\u1ec7n \u00e1p gi\u1ea3m m\u00e0 kh\u00f4ng b\u1ecb t\u1eaft m\u00e1y.<\/p>\n\n <p>V\u1ec1 ph\u00eda \u0111\u1ea7u ra, \u0111i\u1ec7n \u00e1p 24 V DC l\u00e0 ti\u00eau chu\u1ea9n ch\u1ee7 \u0111\u1ea1o trong t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p, \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh b\u1edfi ti\u00eau chu\u1ea9n IEC 61131-2 d\u00e0nh cho thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n l\u1eadp tr\u00ecnh. C\u00e1c m\u1ee9c \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra ph\u1ed5 bi\u1ebfn kh\u00e1c bao g\u1ed3m 5 V (m\u1ea1ch logic s\u1ed1), 12 V (h\u1ec7 th\u1ed1ng \u00f4 t\u00f4 v\u00e0 an ninh) v\u00e0 48 V (vi\u1ec5n th\u00f4ng v\u00e0 h\u1ea1 t\u1ea7ng Power-over-Ethernet). C\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t m\u1ee9c d\u1ef1 ph\u00f2ng t\u1eeb 20% \u0111\u1ebfn 30% so v\u1edbi t\u1ea3i t\u1ed1i \u0111a \u0111\u00e3 t\u00ednh to\u00e1n c\u1ee7a b\u1ea1n. V\u1eadn h\u00e0nh b\u1ed9 ngu\u1ed3n li\u00ean t\u1ee5c \u1edf ho\u1eb7c g\u1ea7n gi\u1edbi h\u1ea1n \u0111\u1ecbnh m\u1ee9c s\u1ebd l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 l\u00e3o h\u00f3a c\u1ee7a c\u00e1c linh ki\u1ec7n, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c t\u1ee5 \u0111i\u1ec7n ph\u00e2n, v\u1ed1n l\u00e0 \u0111i\u1ec3m h\u1ecfng h\u00f3c ph\u1ed5 bi\u1ebfn nh\u1ea5t. M\u1ed9t b\u1ed9 ngu\u1ed3n ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c t\u1ea3i 80% c\u00f3 th\u1ec3 k\u00e9o d\u00e0i 100.000 gi\u1edd; c\u00f9ng m\u1ed9t b\u1ed9 ngu\u1ed3n \u0111\u00f3 \u1edf m\u1ee9c t\u1ea3i 100% c\u00f3 th\u1ec3 h\u1ecfng ch\u1ec9 sau m\u1ed9t n\u1eeda th\u1eddi gian \u0111\u00f3.<\/p>\n\n <h3>K\u00edch th\u01b0\u1edbc v\u00e0 c\u00e1ch l\u1eafp \u0111\u1eb7t \u2014 V\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t quy\u1ebft \u0111\u1ecbnh thi\u1ebft b\u1ecb n\u00e0o ph\u00f9 h\u1ee3p<\/h3>\n\n <p>C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111i\u1ec7n t\u1ed1t nh\u1ea5t tr\u00ean th\u1ebf gi\u1edbi c\u0169ng tr\u1edf n\u00ean v\u00f4 d\u1ee5ng n\u1ebfu b\u1ed9 ngu\u1ed3n kh\u00f4ng v\u1eeba v\u1eb7n v\u1ec1 m\u1eb7t v\u1eadt l\u00fd v\u1edbi v\u1ecb tr\u00ed b\u1ea1n c\u1ea7n l\u1eafp \u0111\u1eb7t. H\u1ea7u h\u1ebft c\u00e1c t\u1ee7 \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p \u0111\u1ec1u s\u1eed d\u1ee5ng ph\u01b0\u01a1ng th\u1ee9c l\u1eafp \u0111\u1eb7t tr\u00ean thanh DIN: m\u1ed9t thanh kim lo\u1ea1i ti\u00eau chu\u1ea9n 35 milim\u00e9t (EN 60715) cho ph\u00e9p g\u1eafn v\u00e0 th\u00e1o b\u1ed9 ngu\u1ed3n m\u00e0 kh\u00f4ng c\u1ea7n d\u1ee5ng c\u1ee5. \u0110\u1ed1i v\u1edbi thi\u1ebft b\u1ecb \u0111\u1ed9c l\u1eadp ho\u1eb7c l\u1eafp \u0111\u1eb7t b\u00e1n ngo\u00e0i tr\u1eddi, c\u00e1c b\u1ed9 ngu\u1ed3n c\u00f3 v\u1ecf b\u1ecdc b\u1eb1ng kim lo\u1ea1i ho\u1eb7c nh\u1ef1a cung c\u1ea5p s\u1ef1 b\u1ea3o v\u1ec7 v\u1eadt l\u00fd v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng b\u1ee5i c\u01a1 b\u1ea3n. C\u00e1c b\u1ed9 ngu\u1ed3n khung m\u1edf, kh\u00f4ng c\u00f3 v\u1ecf b\u1ecdc, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u1eafp \u0111\u1eb7t b\u00ean trong thi\u1ebft b\u1ecb \u0111\u00e3 c\u00f3 s\u1eb5n v\u1ecf b\u1ecdc ri\u00eang. Ch\u00fang gi\u00fap ti\u1ebft ki\u1ec7m kh\u00f4ng gian v\u00e0 chi ph\u00ed nh\u01b0ng y\u00eau c\u1ea7u nh\u00e0 t\u00edch h\u1ee3p ph\u1ea3i \u0111\u1ea3m b\u1ea3o kho\u1ea3ng c\u00e1ch an to\u00e0n v\u00e0 h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t.<\/p>\n\n <h3>C\u00e1c t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 \u2014 \u0110i\u1ec1u g\u00ec gi\u00fap h\u1ec7 th\u1ed1ng ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng khi x\u1ea3y ra s\u1ef1 c\u1ed1<\/h3>\n\n <p>C\u00e1c t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 ch\u00ednh l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed9t ngu\u1ed3n c\u1ea5p \u0111i\u1ec7n c\u00f3 th\u1ec3 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 m\u1ed9t ngu\u1ed3n c\u1ea5p \u0111i\u1ec7n khi\u1ebfn c\u00e1c thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i b\u1ecb ng\u1eebng ho\u1ea1t \u0111\u1ed9ng theo. C\u00f3 b\u1ed1n t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 c\u1ea7n ki\u1ec3m tra k\u1ef9 tr\u01b0\u1edbc khi mua:<\/p>\n\n <p><strong>B\u1ea3o v\u1ec7 qu\u00e1 \u00e1p (OVP)<\/strong> s\u1ebd ng\u1eaft ngu\u1ed3n ra n\u1ebfu v\u00f2ng \u0111i\u1ec1u ch\u1ec9nh g\u1eb7p s\u1ef1 c\u1ed1 v\u00e0 \u0111i\u1ec7n \u00e1p t\u0103ng v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng an to\u00e0n (th\u01b0\u1eddng l\u00e0 t\u1eeb 120% \u0111\u1ebfn 140% so v\u1edbi \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra danh \u0111\u1ecbnh). N\u1ebfu kh\u00f4ng c\u00f3 ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7 qu\u00e1 \u00e1p (OVP), s\u1ef1 c\u1ed1 c\u1ee7a m\u1ed9t linh ki\u1ec7n duy nh\u1ea5t c\u00f3 th\u1ec3 khi\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb \u1edf ph\u00eda h\u1ea1 l\u01b0u ph\u1ea3i ch\u1ecbu m\u1ee9c \u0111i\u1ec7n \u00e1p c\u00f3 th\u1ec3 g\u00e2y h\u01b0 h\u1ecfng.<\/p>\n\n <p><strong>B\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 ng\u1eafn m\u1ea1ch (OCP\/SCP)<\/strong> h\u1ea1n ch\u1ebf d\u00f2ng \u0111i\u1ec7n khi qu\u00e1 t\u1ea3i v\u00e0 ng\u1eaft ngu\u1ed3n ngay l\u1eadp t\u1ee9c khi x\u1ea3y ra ng\u1eafn m\u1ea1ch ho\u00e0n to\u00e0n. H\u1ea7u h\u1ebft c\u00e1c b\u1ed9 ngu\u1ed3n c\u00f4ng nghi\u1ec7p \u0111\u1ec1u s\u1eed d\u1ee5ng \u201cch\u1ebf \u0111\u1ed9 hiccup\u201d \u0111\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 ng\u1eafn m\u1ea1ch: b\u1ed9 ngu\u1ed3n s\u1ebd \u0111\u1ecbnh k\u1ef3 c\u1ed1 g\u1eafng kh\u1edfi \u0111\u1ed9ng l\u1ea1i m\u1ed7i m\u1ed9t \u0111\u1ebfn hai gi\u00e2y, v\u00e0 khi s\u1ef1 c\u1ed1 ng\u1eafn m\u1ea1ch \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c, ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c kh\u00f4i ph\u1ee5c. Ph\u01b0\u01a1ng \u00e1n n\u00e0y hi\u1ec7u qu\u1ea3 h\u01a1n so v\u1edbi ph\u01b0\u01a1ng \u00e1n thay th\u1ebf \u2014 ch\u1ebf \u0111\u1ed9 latch, trong \u0111\u00f3 b\u1ed9 ngu\u1ed3n s\u1ebd duy tr\u00ec tr\u1ea1ng th\u00e1i ng\u1eaft ngu\u1ed3n cho \u0111\u1ebfn khi c\u00f3 ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n t\u1eaft-m\u1edf ngu\u1ed3n th\u1ee7 c\u00f4ng \u2014 t\u1ea1i c\u00e1c h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t t\u1eeb xa ho\u1eb7c \u1edf nh\u1eefng v\u1ecb tr\u00ed kh\u00f3 ti\u1ebfp c\u1eadn.<\/p>\n\n <p><strong>B\u1ea3o v\u1ec7 qu\u00e1 nhi\u1ec7t (OTP)<\/strong> theo d\u00f5i nhi\u1ec7t \u0111\u1ed9 b\u00ean trong v\u00e0 gi\u1ea3m c\u00f4ng su\u1ea5t \u0111\u1ea7u ra ho\u1eb7c t\u1eaft m\u00e1y tr\u01b0\u1edbc khi nhi\u1ec7t \u0111\u1ed9 cao g\u00e2y h\u01b0 h\u1ecfng c\u00e1c linh ki\u1ec7n. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c v\u1ecf m\u00e1y k\u00edn ho\u1eb7c m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec7t \u0111\u1ed9 xung quanh cao, n\u01a1i ph\u01b0\u01a1ng ph\u00e1p l\u00e0m m\u00e1t b\u1eb1ng \u0111\u1ed1i l\u01b0u c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u1ee7 hi\u1ec7u qu\u1ea3.<\/p>\n\n <p>Kh\u00f4ng ph\u1ea3i m\u1ecdi s\u1ea3n ph\u1ea9m tr\u00ean th\u1ecb tr\u01b0\u1eddng \u0111\u1ec1u \u0111\u01b0\u1ee3c trang b\u1ecb s\u1eb5n c\u1ea3 b\u1ed1n t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 n\u00e0y. H\u00e3y ki\u1ec3m tra b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt. N\u1ebfu m\u1ed9t t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 n\u00e0o \u0111\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea r\u00f5 r\u00e0ng, h\u00e3y coi nh\u01b0 t\u00ednh n\u0103ng \u0111\u00f3 kh\u00f4ng c\u00f3.<\/p>\n\n <!-- BP-3: Protection Checklist -->\n <div class=\"bp-3-checklist bd-reveal\">\n <div class=\"bp-3-row\">\n <svg class=\"bp-3-check\" width=\"18\" height=\"18\" 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\"\/><polyline points=\"9 12 11 14 15 10\"\/><\/svg>\n <div class=\"bp-3-content\">\n <div class=\"bp-3-label\">B\u1ea3o v\u1ec7 qu\u00e1 \u00e1p (OVP)<\/div>\n <div class=\"bp-3-desc\">T\u1ef1 \u0111\u1ed9ng ng\u1eaft khi c\u00f4ng su\u1ea5t danh \u0111\u1ecbnh \u0111\u1ea1t 120\u2013140% \u2014 nh\u1eb1m ng\u0103n ng\u1eeba h\u01b0 h\u1ecfng \u1edf c\u00e1c b\u1ed9 ph\u1eadn ph\u00eda sau<\/div>\n <\/div>\n <\/div>\n <div class=\"bp-3-row\">\n <svg class=\"bp-3-check\" width=\"18\" height=\"18\" 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\"\/><polyline points=\"9 12 11 14 15 10\"\/><\/svg>\n <div class=\"bp-3-content\">\n <div class=\"bp-3-label\">Qu\u00e1 d\u00f2ng v\u00e0 ng\u1eafn m\u1ea1ch (OCP\/SCP)<\/div>\n <div class=\"bp-3-desc\">Ch\u1ebf \u0111\u1ed9 Hiccup s\u1ebd t\u1ef1 \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng l\u1ea1i sau m\u1ed7i 1\u20132 gi\u00e2y \u2014 kh\u00f4ng c\u1ea7n thi\u1ebft l\u1eadp l\u1ea1i th\u1ee7 c\u00f4ng<\/div>\n <\/div>\n <\/div>\n <div class=\"bp-3-row\">\n <svg class=\"bp-3-check\" width=\"18\" height=\"18\" 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\"\/><polyline points=\"9 12 11 14 15 10\"\/><\/svg>\n <div class=\"bp-3-content\">\n <div class=\"bp-3-label\">B\u1ea3o v\u1ec7 qu\u00e1 nhi\u1ec7t (OTP)<\/div>\n <div class=\"bp-3-desc\">Gi\u1ea3m c\u00f4ng su\u1ea5t ho\u1eb7c t\u1eaft m\u00e1y tr\u01b0\u1edbc khi nhi\u1ec7t \u0111\u1ed9 cao g\u00e2y h\u01b0 h\u1ecfng c\u00e1c b\u1ed9 ph\u1eadn b\u00ean trong<\/div>\n <\/div>\n <\/div>\n <div class=\"bp-3-row\">\n <svg class=\"bp-3-check\" width=\"18\" height=\"18\" 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\"\/><polyline points=\"9 12 11 14 15 10\"\/><\/svg>\n <div class=\"bp-3-content\">\n <div class=\"bp-3-label\">B\u1ea3o v\u1ec7 khi \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o th\u1ea5p<\/div>\n <div class=\"bp-3-desc\">T\u1eaft m\u00e1y an to\u00e0n khi \u0111i\u1ec7n \u00e1p l\u01b0\u1edbi gi\u1ea3m xu\u1ed1ng d\u01b0\u1edbi ng\u01b0\u1ee1ng ho\u1ea1t \u0111\u1ed9ng<\/div>\n <\/div>\n <\/div>\n <div class=\"bp-3-note\">H\u00e3y ki\u1ec3m tra b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u2014 n\u1ebfu m\u1ed9t t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 kh\u00f4ng \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea, h\u00e3y coi nh\u01b0 t\u00ednh n\u0103ng \u0111\u00f3 kh\u00f4ng c\u00f3.<\/div>\n <\/div>\n\n <h3>Ch\u1ee9ng nh\u1eadn v\u00e0 c\u00e1c ch\u1ec9 s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng \u2014 Tin t\u01b0\u1edfng nh\u01b0ng ph\u1ea3i ki\u1ec3m ch\u1ee9ng<\/h3>\n\n <p>C\u00e1c ch\u1ee9ng nh\u1eadn l\u00e0 y\u1ebfu t\u1ed1 g\u1ea7n nh\u1ea5t v\u1edbi m\u1ed9t ch\u1ec9 b\u00e1o ch\u1ea5t l\u01b0\u1ee3ng kh\u00e1ch quan trong m\u1ed9t th\u1ecb tr\u01b0\u1eddng m\u00e0 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt tr\u00ean gi\u1ea5y t\u1edd c\u00f3 th\u1ec3 tr\u00f4ng gi\u1ed1ng h\u1ec7t nhau d\u00f9 c\u00e1c s\u1ea3n ph\u1ea9m l\u1ea1i ho\u00e0n to\u00e0n kh\u00e1c bi\u1ec7t. C\u00e1c y\u00eau c\u1ea7u n\u00e0y thay \u0111\u1ed5i t\u00f9y theo th\u1ecb tr\u01b0\u1eddng \u0111\u00edch:<\/p>\n\n <p>\u0110\u1ed1i v\u1edbi ch\u00e2u \u00c2u, d\u1ea5u CE l\u00e0 ti\u00eau chu\u1ea9n ph\u00e1p l\u00fd t\u1ed1i thi\u1ec3u \u2014 nh\u01b0ng \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u \u00fd ngh\u0129a th\u1ef1c t\u1ebf c\u1ee7a d\u1ea5u CE. CE l\u00e0 tuy\u00ean b\u1ed1 t\u1ef1 nguy\u1ec7n v\u1ec1 s\u1ef1 ph\u00f9 h\u1ee3p c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 k\u1ebft qu\u1ea3 ki\u1ec3m tra \u0111\u1ed9c l\u1eadp t\u1eeb b\u00ean th\u1ee9 ba. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t uy t\u00edn s\u1ebd ch\u1ee9ng minh cho d\u1ea5u CE c\u1ee7a m\u00ecnh b\u1eb1ng c\u00e1c b\u00e1o c\u00e1o th\u1eed nghi\u1ec7m t\u1eeb c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn; trong khi nh\u1eefng nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebfu \u0111\u1ea1o \u0111\u1ee9c th\u00ec kh\u00f4ng l\u00e0m nh\u01b0 v\u1eady. \u0110\u1ed1i v\u1edbi b\u1ed9 ngu\u1ed3n, c\u00e1c ch\u1ec9 th\u1ecb li\u00ean quan bao g\u1ed3m Ch\u1ec9 th\u1ecb v\u1ec1 \u0110i\u1ec7n \u00e1p Th\u1ea5p (LVD) v\u00e0 Ch\u1ec9 th\u1ecb v\u1ec1 T\u01b0\u01a1ng th\u00edch \u0110i\u1ec7n t\u1eeb (EMC). Vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh RoHS v\u00e0 REACH \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 an to\u00e0n m\u00f4i tr\u01b0\u1eddng v\u00e0 h\u00f3a ch\u1ea5t.<\/p>\n\n <p>\u0110\u1ed1i v\u1edbi khu v\u1ef1c B\u1eafc M\u1ef9, ch\u1ee9ng nh\u1eadn UL c\u00f3 t\u1ea7m quan tr\u1ecdng l\u1edbn h\u01a1n. Kh\u00e1c v\u1edbi ch\u1ee9ng nh\u1eadn CE, vi\u1ec7c \u0111\u1ea1t danh s\u00e1ch UL (theo c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 UL 508 d\u00e0nh cho thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n c\u00f4ng nghi\u1ec7p ho\u1eb7c UL 62368-1 d\u00e0nh cho thi\u1ebft b\u1ecb \u00e2m thanh\/h\u00ecnh \u1ea3nh v\u00e0 c\u00f4ng ngh\u1ec7 th\u00f4ng tin) \u0111\u00f2i h\u1ecfi ph\u1ea3i tr\u1ea3i qua qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m \u0111\u1ed9c l\u1eadp v\u00e0 c\u00e1c \u0111\u1ee3t ki\u1ec3m tra nh\u00e0 m\u00e1y \u0111\u1ecbnh k\u1ef3 do m\u1ed9t Ph\u00f2ng Th\u1eed nghi\u1ec7m \u0110\u01b0\u1ee3c C\u00f4ng nh\u1eadn To\u00e0n qu\u1ed1c (NRTL) th\u1ef1c hi\u1ec7n. C\u00e1c s\u1ea3n ph\u1ea9m kh\u00f4ng c\u00f3 ch\u1ee9ng nh\u1eadn UL s\u1ebd g\u1eb7p ph\u1ea3i nh\u1eefng r\u00e0o c\u1ea3n \u0111\u00e1ng k\u1ec3 trong vi\u1ec7c b\u00e1n h\u00e0ng, b\u1ea3o hi\u1ec3m v\u00e0 vi\u1ec7c \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t ki\u1ec3m tra \u0111i\u1ec7n t\u1ea1i Hoa K\u1ef3 v\u00e0 Canada.<\/p>\n\n <p>\u0110\u1ed1i v\u1edbi c\u00e1c th\u1ecb tr\u01b0\u1eddng Trung \u0110\u00f4ng v\u00e0 \u0110\u00f4ng Nam \u00c1, c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c ch\u1ee9ng nh\u1eadn \u0111\u1ecba ph\u01b0\u01a1ng b\u1ed5 sung \u2014 SASO v\u00e0 SABER \u0111\u1ed1i v\u1edbi \u1ea2 R\u1eadp X\u00ea \u00dat, SIRIM \u0111\u1ed1i v\u1edbi Malaysia, SNI \u0111\u1ed1i v\u1edbi Indonesia. Vi\u1ec7c x\u00e1c nh\u1eadn c\u00e1c y\u00eau c\u1ea7u n\u00e0y tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng s\u1ebd gi\u00fap tr\u00e1nh \u0111\u01b0\u1ee3c nh\u1eefng s\u1ef1 ch\u1eadm tr\u1ec5 trong th\u1ee7 t\u1ee5c th\u00f4ng quan, v\u1ed1n c\u00f3 th\u1ec3 k\u00e9o d\u00e0i h\u00e0ng tu\u1ea7n.<\/p>\n\n <p>Ngo\u00e0i c\u00e1c ch\u1ee9ng nh\u1eadn, c\u00f3 hai ch\u1ec9 s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng th\u1ef1c ti\u1ec5n \u0111\u00e1ng \u0111\u01b0\u1ee3c ch\u00fa \u00fd. C\u00e1c ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t nh\u01b0 80 PLUS (\u0111\u1ed1i v\u1edbi b\u1ed9 ngu\u1ed3n m\u00e1y t\u00ednh) ho\u1eb7c m\u1ee9c hi\u1ec7u su\u1ea5t \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn chi ph\u00ed v\u1eadn h\u00e0nh l\u00e2u d\u00e0i. M\u1ed9t b\u1ed9 ngu\u1ed3n c\u00f3 hi\u1ec7u su\u1ea5t cao h\u01a1n 5% c\u00f3 th\u1ec3 b\u00f9 \u0111\u1eafp \u0111\u01b0\u1ee3c m\u1ee9c ch\u00eanh l\u1ec7ch gi\u00e1 nh\u1edd ti\u1ebft ki\u1ec7m \u0111i\u1ec7n trong v\u00e0i n\u0103m v\u1eadn h\u00e0nh li\u00ean t\u1ee5c. C\u00e1c s\u1ed1 li\u1ec7u MTBF (Th\u1eddi gian trung b\u00ecnh gi\u1eefa c\u00e1c l\u1ea7n h\u1ecfng h\u00f3c), th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ednh theo ti\u00eau chu\u1ea9n Telcordia SR-332 ho\u1eb7c MIL-HDBK-217F, cung c\u1ea5p m\u1ed9t c\u01a1 s\u1edf th\u1ed1ng k\u00ea v\u1ec1 \u0111\u1ed9 tin c\u1eady. C\u00e1c b\u1ed9 ngu\u1ed3n c\u00f4ng nghi\u1ec7p ch\u1ea5t l\u01b0\u1ee3ng cao th\u01b0\u1eddng c\u00f3 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng t\u1eeb 200.000 \u0111\u1ebfn 500.000 gi\u1edd \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng 25\u00b0C, m\u1eb7c d\u00f9 nh\u1eefng con s\u1ed1 n\u00e0y gi\u1ea3 \u0111\u1ecbnh \u0111i\u1ec1u ki\u1ec7n l\u00e0m m\u00e1t v\u00e0 t\u1ea3i ph\u00f9 h\u1ee3p.<\/p>\n\n <hr>\n\n <p><em>\u0110\u1ed1i v\u1edbi nh\u1eefng ai \u0111ang t\u00ecm ngu\u1ed3n cung \u1ee9ng c\u00e1c linh ki\u1ec7n t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p, c\u1ea7n l\u01b0u \u00fd r\u1eb1ng b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch hi\u1ebfm khi ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp trong t\u1ee7 \u0111i\u1ec1u khi\u1ec3n. N\u00f3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t c\u00f9ng v\u1edbi c\u00e1c c\u1ea3m bi\u1ebfn, r\u01a1le, c\u00f4ng t\u1eafc t\u01a1, PLC v\u00e0 c\u1ea7u dao \u2013 t\u1ea5t c\u1ea3 \u0111\u1ec1u c\u1ea7n \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn k\u1ef9 thu\u1eadt, t\u00ecm ngu\u1ed3n cung \u1ee9ng v\u00e0 b\u1ea3o tr\u00ec. H\u1ee3p t\u00e1c v\u1edbi c\u00e1c nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng nhi\u1ec1u danh m\u1ee5c s\u1ea3n ph\u1ea9m s\u1ebd gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a quy tr\u00ecnh mua s\u1eafm v\u00e0 gi\u1ea3m b\u1edbt g\u00e1nh n\u1eb7ng trong vi\u1ec7c qu\u1ea3n l\u00fd m\u1ed1i quan h\u1ec7 v\u1edbi h\u00e0ng ch\u1ee5c nh\u00e0 m\u00e1y kh\u00e1c nhau. V\u00ed d\u1ee5, OMCH cung c\u1ea5p c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch c\u00f3 c\u00f4ng su\u1ea5t t\u1eeb 15 \u0111\u1ebfn 480 watt c\u00f9ng v\u1edbi h\u01a1n 30 danh m\u1ee5c linh ki\u1ec7n t\u1ef1 \u0111\u1ed9ng h\u00f3a kh\u00e1c, bao g\u1ed3m c\u1ea3m bi\u1ebfn, r\u01a1le v\u00e0 thi\u1ebft b\u1ecb ph\u00e2n ph\u1ed1i \u0111i\u1ec7n \u00e1p th\u1ea5p. Danh m\u1ee5c s\u1ea3n ph\u1ea9m c\u1ee7a h\u1ecd c\u00f3 s\u1eb5n t\u1ea1i <a href=\"https:\/\/www.omch.com\/vi\/switch-mode-power-supply\/\">omch.com\/switch-mode-power-supply<\/a>.<\/em><\/p>\n\n <!-- BP-cta-end: End CTA Panel -->\n <div class=\"bp-cta-end bd-reveal\">\n <svg class=\"bp-cta-end-icon\" width=\"28\" height=\"28\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect x=\"2\" y=\"4\" width=\"20\" height=\"16\" rx=\"2\"\/><path d=\"M22 7l-10 7L2 7\"\/><\/svg>\n <div class=\"bp-cta-end-title\">Ngu\u1ed3n cung c\u1ea5p b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch c\u00f4ng nghi\u1ec7p (SMPS) v\u00e0 c\u00e1c linh ki\u1ec7n t\u1ef1 \u0111\u1ed9ng h\u00f3a<\/div>\n <div class=\"bp-cta-end-sub\">So s\u00e1nh c\u00e1c lo\u1ea1i b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch g\u1eafn tr\u00ean thanh DIN, lo\u1ea1i k\u00edn v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch cho \u0111\u00e8n LED c\u00f3 c\u00f4ng su\u1ea5t t\u1eeb 15W \u0111\u1ebfn 480W \u2014 c\u00f9ng v\u1edbi c\u00e1c c\u1ea3m bi\u1ebfn, r\u01a1le v\u00e0 thi\u1ebft b\u1ecb ph\u00e2n ph\u1ed1i t\u1eeb m\u1ed9t nh\u00e0 cung c\u1ea5p duy nh\u1ea5t.<\/div>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">\n Xem c\u00e1c s\u1ea3n ph\u1ea9m b\u1ed9 ngu\u1ed3n\n <svg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><line x1=\"5\" y1=\"12\" x2=\"19\" y2=\"12\"\/><polyline points=\"12 5 19 12 12 19\"\/><\/svg>\n <\/a>\n <\/div>\n\n <h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n\n <ol>\n <li>Monolithic Power Systems. \u201cB\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch: \u1ee8ng d\u1ee5ng, \u01b0u \u0111i\u1ec3m v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng.\u201d <a href=\"https:\/\/www.monolithicpower.com\/en\/learning\/resources\/switching-power-supply\">https:\/\/www.monolithicpower.com\/en\/learning\/resources\/switching-power-supply<\/a><\/li>\n <li>Electronics For You. \u201cSMPS: Ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch.\u201d <a href=\"https:\/\/www.electronicsforu.com\/technology-trends\/learn-electronics\/smps-basics-switched-mode-power-supply\">https:\/\/www.electronicsforu.com\/technology-trends\/learn-electronics\/smps-basics-switched-mode-power-supply<\/a><\/li>\n <li>Analog Devices. \u201cAN-140: C\u00e1c kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u1ec1 b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh tuy\u1ebfn t\u00ednh v\u00e0 b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch.\u201d <a href=\"https:\/\/www.analog.com\/en\/resources\/app-notes\/an-140.html\">https:\/\/www.analog.com\/en\/resources\/app-notes\/an-140.html<\/a><\/li>\n <li>GIC \u1ea4n \u0110\u1ed9. \u201cSMPS c\u00f4ng nghi\u1ec7p l\u00e0 g\u00ec? Gi\u1ea3i th\u00edch v\u1ec1 c\u00e1c lo\u1ea1i, \u1ee9ng d\u1ee5ng v\u00e0 l\u1ee3i \u00edch.\u201d <a href=\"https:\/\/www.gicindia.com\/what-is-industrial-smps\/\">https:\/\/www.gicindia.com\/what-is-industrial-smps\/<\/a><\/li>\n <li>IEC 61131-2. \u201cB\u1ed9 \u0111i\u1ec1u khi\u1ec3n l\u1eadp tr\u00ecnh \u2014 Ph\u1ea7n 2: Y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi thi\u1ebft b\u1ecb v\u00e0 c\u00e1c th\u1eed nghi\u1ec7m.\u201d \u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf.<\/li>\n <li>EN 60715. \u201cK\u00edch th\u01b0\u1edbc c\u1ee7a thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft v\u00e0 \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p th\u1ea5p \u2014 C\u00e1ch l\u1eafp \u0111\u1eb7t ti\u00eau chu\u1ea9n tr\u00ean thanh ray \u0111\u1ec3 h\u1ed7 tr\u1ee3 c\u01a1 h\u1ecdc cho c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n.\u201d CENELEC.<\/li>\n <li>OMCH. \u201cB\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch.\u201d <a href=\"https:\/\/www.omch.com\/vi\/switch-mode-power-supply\/\">https:\/\/www.omch.com\/switch-mode-power-supply\/<\/a><\/li>\n <li>OMCH. \u201cTrang ch\u1ee7.\u201d <a href=\"https:\/\/www.omch.com\/vi\/\">https:\/\/www.omch.com\/<\/a><\/li>\n <\/ol>\n\n <\/article>\n<\/div>\n<!-- \u2191\u2191\u2191 Fragment ends here. \u2191\u2191\u2191 -->\n<\/body><\/html>\n\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) l\u00e0 g\u00ec? C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i v\u00e0 nh\u1eefng \u0111i\u1ec1u c\u1ea7n l\u01b0u \u00fd B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch (SMPS) l\u00e0 g\u00ec? B\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch \u2014 c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1ed9 ngu\u1ed3n ch\u1ebf \u0111\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 ngu\u1ed3n ch\u1ebf \u0111\u1ed9 c\u00f4ng t\u1eafc ho\u1eb7c \u0111\u01a1n gi\u1ea3n l\u00e0 SMPS \u2014 l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n t\u1eeb d\u1ea1ng n\u00e0y sang d\u1ea1ng kh\u00e1c b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng [\u2026]<\/p>","protected":false},"author":4,"featured_media":4798,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"What Is a Switching Power Supply (SMPS)? How It Works, Types, and What to Look For","_seopress_titles_desc":"Complete guide to Switching Power Supplies (SMPS). Learn how they work, compare efficiency with linear power supplies, and explore industrial types and selection criteria.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-4789","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\/4789","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=4789"}],"version-history":[{"count":2,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/4789\/revisions"}],"predecessor-version":[{"id":12108,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/4789\/revisions\/12108"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/4798"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=4789"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=4789"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=4789"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}