{"id":805,"date":"2021-10-01T05:09:15","date_gmt":"2021-10-01T05:09:15","guid":{"rendered":"https:\/\/www.wehopower.com\/?post_type=news&#038;p=805"},"modified":"2026-10-19T12:01:43","modified_gmt":"2026-10-19T04:01:43","slug":"history-of-switch-mode-power-supplies-smps","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/vi\/news\/history-of-switch-mode-power-supplies-smps\/","title":{"rendered":"L\u1ecbch s\u1eed ngu\u1ed3n cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng \u1edf ch\u1ebf \u0111\u1ed9 chuy\u1ec3n \u0111\u1ed5i (SMPS)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Chuy\u1ec3n \u0111\u1ed5i<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.wehopower.com\/vi\/news\/history-of-switch-mode-power-supplies-smps\/#Ower_Supplies_%E2%80%93_just_how_far_have_we_come\" >Ngu\u1ed3n cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng \u2013 ch\u00fang ta \u0111\u00e3 \u0111i \u0111\u01b0\u1ee3c bao xa?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/vi\/news\/history-of-switch-mode-power-supplies-smps\/#Technological_Advancement\" >Ti\u1ebfn b\u1ed9 c\u00f4ng ngh\u1ec7?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/vi\/news\/history-of-switch-mode-power-supplies-smps\/#Calculating_Power\" >T\u00ednh c\u00f4ng su\u1ea5t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/vi\/news\/history-of-switch-mode-power-supplies-smps\/#Cooling_Off_in_the_70s_and_80s\" >H\u1ea1 nhi\u1ec7t trong th\u1eadp ni\u00ean 70 v\u00e0 80?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/vi\/news\/history-of-switch-mode-power-supplies-smps\/#EU_Shakeup\" >S\u1ef1 thay \u0111\u1ed5i c\u1ee7a EU<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Ower_Supplies_%E2%80%93_just_how_far_have_we_come\"><\/span>Ngu\u1ed3n cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng \u2013 ch\u00fang ta \u0111\u00e3 \u0111i \u0111\u01b0\u1ee3c bao xa?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-809\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-scaled.jpg?quality=85&#038;strip=all\" alt=\"L\u1ecbch s\u1eed c\u1ee7a c\u00e1c ngu\u1ed3n cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng \u1edf ch\u1ebf \u0111\u1ed9 chuy\u1ec3n \u0111\u1ed5i (SMPS)=\" width=\"800\" height=\"426\" history of switch mode power supplies title=\"\" srcset=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-scaled.jpg 2560w, https:\/\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-300x160.jpg 300w, https:\/\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-1024x546.jpg 1024w, https:\/\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-768x409.jpg 768w, https:\/\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-1536x818.jpg 1536w, https:\/\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-2048x1091.jpg 2048w, https:\/\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-1568x836.jpg 1568w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Switch-mode power supply technology has developed over the years, particularly in efficiency and power density. More compact power conversion can help equipment designers make better use of limited enclosure space.<\/p>\n<p>Compare power density using the exact model, operating load and thermal conditions rather than transferring the rating of one historical product to another.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Technological_Advancement\"><\/span>Ti\u1ebfn b\u1ed9 c\u00f4ng ngh\u1ec7?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Early switch-mode power-supply development in the 1950s involved both vacuum-tube and transistor-based concepts. Rather than assigning a single first invention, this overview follows the technical move toward smaller and more efficient power conversion.<\/p>\n<p>V\u1edbi l\u00e0n s\u00f3ng ti\u1ebfn b\u1ed9 c\u00f4ng ngh\u1ec7 n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf \u0111\u1ed9t nhi\u00ean c\u00f3 th\u1ec3 ch\u1ecdn t\u1eeb nhi\u1ec1u th\u00e0nh ph\u1ea7n v\u00e0 nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t, mang l\u1ea1i cho h\u1ecd s\u1ed1 l\u01b0\u1ee3ng t\u00f9y ch\u1ecdn ch\u01b0a t\u1eebng c\u00f3 v\u00e0 c\u00e1c thi\u1ebft k\u1ebf c\u00f3 kh\u1ea3 n\u0103ng mang t\u00ednh \u0111\u1ed9t ph\u00e1.<\/p>\n<p>Tr\u1ecdng t\u00e2m c\u1ee7a giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n chuy\u00ean s\u00e2u n\u00e0y l\u00e0 b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh tuy\u1ebfn t\u00ednh truy\u1ec1n th\u1ed1ng \u2013 nh\u1eefng b\u1ed9 \u00f3c th\u00f4ng minh nh\u1ea5t \u0111ang c\u1ed1 g\u1eafng t\u00ecm ra c\u00e1ch h\u1ecd c\u00f3 th\u1ec3 thay th\u1ebf m\u00e1y bi\u1ebfn \u00e1p v\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec7n tr\u1edf l\u1ed7i th\u1eddi \u0111\u1ec3 thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o b\u1eb1ng m\u1ed9t thi\u1ebft k\u1ebf hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<p>\u00dd t\u01b0\u1edfng m\u00e0 h\u1ecd th\u1ef1c hi\u1ec7n l\u00e0 s\u1eed d\u1ee5ng m\u1ed9t b\u00f3ng b\u00e1n d\u1eabn \u0111\u1ec3 gi\u1ea3m \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o xu\u1ed1ng v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh nh\u1ecf h\u01a1n gi\u00e1 tr\u1ecb \u0111\u1ea7u v\u00e0o ban \u0111\u1ea7u (ch\u00fang t\u00f4i c\u00f3 m\u1ed9t kho b\u00e0i vi\u1ebft k\u1ef9 thu\u1eadt tuy\u1ec7t v\u1eddi tr\u00ean trang web n\u1ebfu b\u1ea1n mu\u1ed1n m\u00f4 t\u1ea3 chi ti\u1ebft h\u01a1n v\u1ec1 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SMPS).<\/p>\n<p>V\u1edbi hi\u1ec7u su\u1ea5t cao h\u01a1n v\u00e0 c\u1ea7n \u00edt v\u1eadt li\u1ec7u t\u1eeb t\u00ednh h\u01a1n, c\u00f4ng ngh\u1ec7 m\u1edbi nh\u1ecf h\u01a1n, nh\u1eb9 h\u01a1n v\u00e0 t\u1ea1o ra \u00edt nhi\u1ec7t h\u01a1n.<\/p>\n<p>Gi\u1ed1ng nh\u01b0 nh\u1eefng ph\u00e1t minh hi\u1ec7n \u0111\u1ea1i c\u00f3 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m \u0111\u00f3, gi\u1ea3i ph\u00e1p c\u1ee7a nh\u1eefng n\u0103m 1950 n\u00e0y c\u1ef1c k\u1ef3 h\u1ea5p d\u1eabn c\u00e1c doanh nghi\u1ec7p trong nhi\u1ec1u l\u0129nh v\u1ef1c \u2013 t\u1eeb \u0111i\u1ec7n t\u1eed \u0111\u1ebfn h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 truy\u1ec1n th\u00f4ng \u0111\u1ebfn \u0111i\u1ec7n to\u00e1n, \u0111\u00e3 c\u00f3 r\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi \u00e1p d\u1ee5ng s\u1edbm, m\u1ed7i ng\u01b0\u1eddi \u0111\u1ec1u \u0111ang ch\u1ea1y \u0111ua \u0111\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1t nh\u1ea5t c\u00f4ng ngh\u1ec7 cung c\u1ea5p \u0111i\u1ec7n m\u1edbi n\u00e0y.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Calculating_Power\"><\/span>T\u00ednh c\u00f4ng su\u1ea5t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>During the 1970s, switching power conversion became useful in compact electronic equipment, where reducing power-supply size and weight mattered.<\/p>\n<p>The same design priorities apply to computing equipment: a more efficient power stage can reduce transformer size, heat dissipation and the space required for cooling.<\/p>\n<p>T\u01b0\u01a1ng t\u1ef1, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 \u0111ang xem x\u00e9t c\u00e1ch h\u1ecd c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 kh\u00f4ng gian c\u0169ng b\u1eaft \u0111\u1ea7u h\u01b0\u1edbng t\u1edbi c\u00e1c b\u1ed9 ngu\u1ed3n chuy\u1ec3n \u0111\u1ed5i t\u00f9y ch\u1ec9nh \u0111\u1ec3 t\u1ea1o ra c\u00e1c thi\u1ebft k\u1ebf hi\u1ec7u qu\u1ea3 h\u01a1n nhi\u1ec1u.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cooling_Off_in_the_70s_and_80s\"><\/span>H\u1ea1 nhi\u1ec7t trong th\u1eadp ni\u00ean 70 v\u00e0 80?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nh\u1eefng n\u0103m 1970 l\u00e0 m\u1ed9t th\u1eadp k\u1ef7 b\u1eadn r\u1ed9n khi b\u01b0\u1edbc \u0111\u1ed9t ph\u00e1 ban \u0111\u1ea7u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u00e0 s\u1ef1 \u0111\u1ed5i m\u1edbi ti\u1ebfp t\u1ee5c v\u1edbi t\u1ed1c \u0111\u1ed9 r\u1ea5t \u0111\u00e1ng n\u1ec3. M\u1ed9t s\u1ed1 c\u00f4ng ty \u1edf Anh, M\u1ef9 v\u00e0 Nh\u1eadt B\u1ea3n b\u1eaft \u0111\u1ea7u \u0111\u01b0a ra th\u1ecb tr\u01b0\u1eddng c\u00e1c s\u1ea3n ph\u1ea9m b\u1ed9 ngu\u1ed3n ti\u00eau chu\u1ea9n.<\/p>\n<p>Claims about who first commercialized the technology vary; this overview does not assign a single originator.<\/p>\n<p>The electronics press of the era featured SMPS articles and advertisements as standard products became more widely available. Open-frame, enclosed and modular designs gave equipment builders alternatives to custom linear power stages.<\/p>\n<p>The adoption of switching power supplies in personal computers helped designers pursue smaller and lighter systems. Cooling still depended on total losses, enclosure conditions and component limits: some designs relied on convection, while others used fans, including fan-cooled ATX-style arrangements.<\/p>\n<p>In the late 1980s and early part of the 1990s, industry-standard 3 x 5\u201d power supplies became available with an auto-ranging input that sensed whether it was connected to 120VAC or 230VAC and adjusted accordingly. These products had powers of 25 \u2013 40W, or 1.66 to 2.66W\/In2<\/p>\n<h3><span class=\"ez-toc-section\" id=\"EU_Shakeup\"><\/span>S\u1ef1 thay \u0111\u1ed5i c\u1ee7a EU<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi ng\u00e0y c\u00e0ng c\u00f3 nhi\u1ec1u c\u00f4ng ty tham gia v\u00e0o th\u1ecb tr\u01b0\u1eddng, m\u1ed9t s\u1ed1 ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p l\u1ecfng l\u1ebbo xu\u1ea5t hi\u1ec7n xung quanh c\u00e1c k\u00edch th\u01b0\u1edbc ph\u1ed5 bi\u1ebfn nh\u01b0 3\u00d75\u201d. M\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng b\u1eaft \u0111\u1ea7u c\u1ea3i thi\u1ec7n khi nh\u1eefng ti\u1ebfn b\u1ed9 v\u1ec1 t\u1eeb t\u00ednh, b\u00f3ng b\u00e1n d\u1eabn chuy\u1ec3n m\u1ea1ch v\u00e0 IC \u0111i\u1ec1u khi\u1ec3n ph\u00e1t tri\u1ec3n. Nh\u1eefng thay \u0111\u1ed5i n\u00e0y mang l\u1ea1i hi\u1ec7u su\u1ea5t cao h\u01a1n v\u00e0 t\u1ea1o ra m\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng t\u1ed1t h\u01a1n.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ower Supplies &#8211; just how far have we come? Switch-mode power supply technology has developed over the years, particularly in efficiency and power density. More compact power conversion can help equipment designers make better use of limited enclosure space. Compare power density using the exact model, operating load and thermal conditions rather than transferring the&hellip; <a class=\"more-link\" href=\"https:\/\/www.wehopower.com\/vi\/news\/history-of-switch-mode-power-supplies-smps\/\">Ti\u1ebfp t\u1ee5c \u0111\u1ecdc <span class=\"screen-reader-text\">L\u1ecbch s\u1eed ngu\u1ed3n cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng \u1edf ch\u1ebf \u0111\u1ed9 chuy\u1ec3n \u0111\u1ed5i (SMPS)<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":809,"parent":0,"menu_order":703,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149,148],"class_list":["post-805","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-blog","news_category-industry-news","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news\/805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/comments?post=805"}],"version-history":[{"count":1,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news\/805\/revisions"}],"predecessor-version":[{"id":19588,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news\/805\/revisions\/19588"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/media\/809"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/media?parent=805"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news_category?post=805"}],"curies":[{"name":"wp c\u1ee7a t\u00f4i","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}