{"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\/fr\/news\/history-of-switch-mode-power-supplies-smps\/","title":{"rendered":"Historique des alimentations \u00e0 d\u00e9coupage (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\">Table des mati\u00e8res<\/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;\">Basculer<\/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\/fr\/news\/history-of-switch-mode-power-supplies-smps\/#Ower_Supplies_%E2%80%93_just_how_far_have_we_come\" >Propres fournitures-jusqu 'o\u00f9 sommes-nous all\u00e9s?<\/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\/fr\/news\/history-of-switch-mode-power-supplies-smps\/#Technological_Advancement\" >Avanc\u00e9e technologique?<\/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\/fr\/news\/history-of-switch-mode-power-supplies-smps\/#Calculating_Power\" >Calculer la puissance<\/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\/fr\/news\/history-of-switch-mode-power-supplies-smps\/#Cooling_Off_in_the_70s_and_80s\" >Cooling Off in the \u201970s and\u2019 80s?<\/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\/fr\/news\/history-of-switch-mode-power-supplies-smps\/#EU_Shakeup\" >Le shakeup<\/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>Propres fournitures-jusqu 'o\u00f9 sommes-nous all\u00e9s?<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=\"Histoire des alimentations en mode commutateur (SMPS) title =\" 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>Avanc\u00e9e technologique?<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>Avec cet afflux de progr\u00e8s technologiques, les concepteurs ont soudainement pu choisir parmi plusieurs composants et plusieurs fabricants, ce qui leur a donn\u00e9 un nombre sans pr\u00e9c\u00e9dent d'options et de conceptions potentiellement r\u00e9volutionnaires.<\/p>\n<p>Cette p\u00e9riode intensive de d\u00e9veloppement a \u00e9t\u00e9 ax\u00e9e sur le r\u00e9gulateur lin\u00e9aire traditionnel-les esprits les plus brillants essayaient de comprendre comment ils pourraient remplacer la m\u00e9thode obsol\u00e8te de transformateur et de r\u00e9sistance de changement de tension d'entr\u00e9e par une conception plus efficace.<\/p>\n<p>L'id\u00e9e sur laquelle ils ont atterri utilisait un transistor pour couper la tension d'entr\u00e9e avec une valeur moyenne inf\u00e9rieure \u00e0 l'entr\u00e9e initiale (nous avons un magasin fantastique d'articles techniques ici sur le site si vous souhaitez une description plus d\u00e9taill\u00e9e du fonctionnement de SMPS).<\/p>\n<p>Avec une efficacit\u00e9 plus \u00e9lev\u00e9e et moins de mat\u00e9riaux magn\u00e9tiques n\u00e9cessaires, la nouvelle technologie \u00e9tait plus petite, plus l\u00e9g\u00e8re et g\u00e9n\u00e9rait moins de chaleur.<\/p>\n<p>Comme pour les inventions modernes pr\u00e9sentant ces caract\u00e9ristiques, cette solution des ann\u00e9es 1950 \u00e9tait extr\u00eamement attrayante pour les entreprises de divers secteurs-de l'\u00e9lectronique \u00e0 l'a\u00e9rospatiale et des communications \u00e0 l'informatique, il y avait un flot d'adopteurs pr\u00e9coces chacun man\u0153uvrant pour tirer le meilleur parti de cette nouvelle technologie d'alimentation \u00e9lectrique.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Calculating_Power\"><\/span>Calculer la puissance<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>De m\u00eame, les fabricants a\u00e9rospatiaux qui envisageaient de r\u00e9aliser des \u00e9conomies de poids et d'espace ont \u00e9galement commenc\u00e9 \u00e0 se tourner vers des alimentations \u00e0 commutation personnalis\u00e9es pour cr\u00e9er des conceptions beaucoup plus efficaces.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cooling_Off_in_the_70s_and_80s\"><\/span>Cooling Off in the \u201970s and\u2019 80s?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Les ann\u00e9es 1970 ont \u00e9t\u00e9 une d\u00e9cennie occup\u00e9e une fois que la perc\u00e9e initiale avait \u00e9t\u00e9 faite et l'innovation a continu\u00e9 \u00e0 un rythme tr\u00e8s respectable. Plusieurs entreprises au Royaume-Uni, aux \u00c9tats-Unis et au Japon ont commenc\u00e9 \u00e0 commercialiser des produits d'alimentation \u00e9lectrique standard.<\/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>Le shakeup<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Comme de plus en plus d'entreprises sont entr\u00e9es sur le march\u00e9, certaines normes industrielles l\u00e2ches sont apparues autour de tailles courantes comme 3 \u00d7 5 \u201d. Les densit\u00e9s de puissance ont commenc\u00e9 \u00e0 s'am\u00e9liorer \u00e0 mesure que les progr\u00e8s dans le magn\u00e9tisme, les transistors \u00e0 commutation et les circuits int\u00e9gr\u00e9s de contr\u00f4leur progressaient.<\/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\/fr\/news\/history-of-switch-mode-power-supplies-smps\/\">Continuer la lecture <span class=\"screen-reader-text\">Historique des alimentations \u00e0 d\u00e9coupage (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\/fr\/wp-json\/wp\/v2\/news\/805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/fr\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/fr\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/fr\/wp-json\/wp\/v2\/comments?post=805"}],"version-history":[{"count":1,"href":"https:\/\/www.wehopower.com\/fr\/wp-json\/wp\/v2\/news\/805\/revisions"}],"predecessor-version":[{"id":19588,"href":"https:\/\/www.wehopower.com\/fr\/wp-json\/wp\/v2\/news\/805\/revisions\/19588"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/fr\/wp-json\/wp\/v2\/media\/809"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/fr\/wp-json\/wp\/v2\/media?parent=805"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/fr\/wp-json\/wp\/v2\/news_category?post=805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}