{"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":"2026-08-31T14:11:09","modified_gmt":"2026-08-31T06:11:09","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&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:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-scaled.jpg?quality=85&strip=all 2560w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-300x160.jpg?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-1024x546.jpg?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-768x409.jpg?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-1536x818.jpg?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-2048x1091.jpg?quality=85&strip=all 2048w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2021\/11\/History-Of-Switch-Mode-Power-Supplies-SMPS-1568x836.jpg?quality=85&strip=all 1568w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>G\u1ea7n \u0111\u00e2y t\u00f4i \u0111\u00e3 \u0103n tr\u01b0a v\u1edbi m\u1ed9t kh\u00e1ch h\u00e0ng m\u00e0 ch\u00fang t\u00f4i \u0111\u00e3 l\u00e0m vi\u1ec7c c\u00f9ng t\u1eeb cu\u1ed1i nh\u1eefng n\u0103m 1990. Ch\u00fang t\u00f4i \u0111\u00e3 th\u1ea5y r\u1ea5t nhi\u1ec1u thay \u0111\u1ed5i trong th\u1eddi gian \u0111\u00f3 v\u00e0 khi kh\u00f3a h\u1ecdc ch\u00ednh \u0111\u1ebfn, ch\u00fang t\u00f4i b\u1eaft \u0111\u1ea7u n\u00f3i v\u1ec1 c\u00f4ng ngh\u1ec7 cung c\u1ea5p \u0111i\u1ec7n \u0111\u00e3 ph\u00e1t tri\u1ec3n nh\u01b0 th\u1ebf n\u00e0o trong nh\u1eefng n\u0103m qua. \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n r\u00f5 nh\u1ea5t trong l\u0129nh v\u1ef1c hi\u1ec7u qu\u1ea3 v\u00e0 m\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng.<\/p>\n<p>Thi\u1ebft b\u1ecb \u0111\u1ea7u ti\u00ean anh thi\u1ebft k\u1ebf s\u1eed d\u1ee5ng XP Power l\u00e0 PSU 3 x 5 inch 40W. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t cu\u1ed9c c\u00e1ch m\u1ea1ng v\u00e0o th\u1eddi \u0111i\u1ec3m \u0111\u00f3 nh\u01b0ng khi b\u1ea1n xem x\u00e9t r\u1eb1ng s\u1ea3n ph\u1ea9m g\u1ea7n \u0111\u00e2y nh\u1ea5t c\u1ee7a anh \u1ea5y s\u1eed d\u1ee5ng b\u1ed9 350W trong c\u00f9ng m\u1ed9t kh\u00f4ng gian, b\u1ea1n s\u1ebd th\u1ea5y r\u00f5 ch\u00fang ta \u0111\u00e3 \u0111i \u0111\u01b0\u1ee3c bao xa.<\/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>T\u00f4i \u0111\u00e3 th\u1ef1c hi\u1ec7n m\u1ed9t nghi\u00ean c\u1ee9u nh\u1ecf v\u1ec1 v\u1ea5n \u0111\u1ec1 n\u00e0y sau b\u1eefa tr\u01b0a l\u00e0m vi\u1ec7c c\u1ee7a ch\u00fang t\u00f4i v\u00e0 theo nh\u01b0 t\u00f4i c\u00f3 th\u1ec3 n\u00f3i, b\u1ed9 ngu\u1ed3n chuy\u1ec3n \u0111\u1ed5i ch\u1ebf \u0111\u1ed9 \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c IBM thi\u1ebft k\u1ebf v\u00e0o n\u0103m 1958. Ch\u00fang d\u1ef1a tr\u00ean c\u00f4ng ngh\u1ec7 \u1ed1ng ch\u00e2n kh\u00f4ng. M\u1ed9t s\u1ed1 b\u1eb1ng s\u00e1ng ch\u1ebf v\u1ec1 \u2018dao \u0111\u1ed9ng b\u00f3ng b\u00e1n d\u1eabn\u2019 \u0111\u00e3 \u0111\u01b0\u1ee3c General Motors Corporation n\u1ed9p c\u00f9ng th\u1eddi gian \u0111\u00f3.<\/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>Trong v\u00e0i n\u0103m ti\u1ebfp theo, m\u1ed9t lo\u1ea1t b\u1eb1ng s\u00e1ng ch\u1ebf v\u00e0 thi\u1ebft k\u1ebf \u0111\u00e3 xu\u1ea5t hi\u1ec7n \u2013 nhi\u1ec1u trong s\u1ed1 \u0111\u00f3 ch\u00fang ta v\u1eabn s\u1eed d\u1ee5ng cho \u0111\u1ebfn ng\u00e0y nay. N\u0103m 1972, Hewlett Packard s\u1eed d\u1ee5ng b\u1ed9 ngu\u1ed3n chuy\u1ec3n m\u1ea1ch trong m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u1ea7u ti\u00ean c\u1ee7a m\u00ecnh. N\u0103m 1976 ch\u1ee9ng ki\u1ebfn \u200b\u200bb\u1eb1ng s\u00e1ng ch\u1ebf \u0111\u1ea7u ti\u00ean s\u1eed d\u1ee5ng thu\u1eadt ng\u1eef cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed5i ch\u1ebf \u0111\u1ed9 (SMPS).<\/p>\n<p>M\u00e1y t\u00ednh c\u1ee7a HP th\u1ef1c s\u1ef1 l\u00e0 m\u1ed9t chi\u1ebfc m\u00e1y t\u00ednh \u2013 m\u1eb7c d\u00f9 c\u00f3 \u0111\u1ecbnh d\u1ea1ng h\u01a1i kh\u00e1c so v\u1edbi nh\u1eefng g\u00ec ch\u00fang ta bi\u1ebft ng\u00e0y nay. H\u1ed3i \u0111\u00f3, thi\u1ebft k\u1ebf ban \u0111\u1ea7u n\u1eb7ng h\u01a1n 40 pound. SMPS \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong thi\u1ebft k\u1ebf \u0111\u1ec3 ti\u1ebft ki\u1ec7m c\u1ea3 kh\u00f4ng gian v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng, \u0111\u00e1nh d\u1ea5u b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean h\u01b0\u1edbng t\u1edbi m\u00e1y t\u00ednh, m\u00e1y t\u00ednh x\u00e1ch tay v\u00e0 m\u00e1y t\u00ednh b\u1ea3ng si\u00eau m\u1ecfng v\u00e0 c\u1ef1c k\u1ef3 nh\u1eb9 m\u00e0 ch\u00fang ta s\u1eed d\u1ee5ng ng\u00e0y nay.<\/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>Cho \u0111\u1ebfn ng\u00e0y nay, c\u00f3 kho\u1ea3ng ch\u1ee5c c\u00f4ng ty tuy\u00ean b\u1ed1 l\u00e0 c\u00f4ng ty \u0111\u1ea7u ti\u00ean thi\u1ebft k\u1ebf v\u00e0 ti\u1ebfp th\u1ecb th\u00e0nh c\u00f4ng b\u1ed9 ngu\u1ed3n chuy\u1ec3n \u0111\u1ed5i ch\u1ebf \u0111\u1ed9 \u2013 v\u00ec v\u1eady ch\u00fang t\u00f4i s\u1ebd kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn \u0111i\u1ec1u \u0111\u00f3!<\/p>\n<p>C\u00e1c t\u1ea1p ch\u00ed \u0111i\u1ec7n t\u1eed th\u1eddi \u0111\u00f3 \u0111\u0103ng c\u00e1c b\u00e0i b\u00e1o v\u00e0 qu\u1ea3ng c\u00e1o v\u1ec1 SMPS. Ng\u01b0\u1eddi d\u1eabn \u0111\u1ea7u l\u00fac b\u1ea5y gi\u1edd l\u00e0 Boschert Inc., m\u1ed9t t\u1eadp \u0111o\u00e0n c\u1ee7a M\u1ef9 th\u00e0nh l\u1eadp \u1edf California. N\u00f3 thay th\u1ebf ngu\u1ed3n \u0111i\u1ec7n m\u00e1y in tuy\u1ebfn t\u00ednh b\u1eb1ng thi\u1ebft k\u1ebf ch\u1ebf \u0111\u1ed9 chuy\u1ec3n \u0111\u1ed5i.<\/p>\n<p>C\u00f4ng ty n\u00e0y \u0111\u00e3 ph\u00e1t tri\u1ec3n l\u00ean h\u01a1n 1000 ng\u01b0\u1eddi, v\u1edbi nhi\u1ec1u lo\u1ea1i s\u1ea3n ph\u1ea9m bao g\u1ed3m b\u1ed9 ngu\u1ed3n khung m\u1edf, v\u1ecf v\u00e0 m\u00f4-\u0111un. Cu\u1ed1i c\u00f9ng n\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c Computer Products Inc. mua l\u1ea1i v\u00e0o gi\u1eefa nh\u1eefng n\u0103m 80.<\/p>\n<p>M\u00e1y t\u00ednh Apple l\u1ea7n \u0111\u1ea7u ti\u00ean gi\u1edbi thi\u1ec7u b\u1ed9 ngu\u1ed3n chuy\u1ec3n \u0111\u1ed5i ch\u1ebf \u0111\u1ed9 v\u00e0o m\u00e1y t\u00ednh Apple II v\u00e0o nh\u1eefng n\u0103m 1970. C\u00f4ng ngh\u1ec7 nh\u1ecf nh\u01b0ng hi\u1ec7u qu\u1ea3 cao n\u00e0y gi\u00fap Apple c\u00f3 th\u1ec3 t\u1ea1o ra m\u1ed9t chi\u1ebfc m\u00e1y t\u00ednh nh\u1ecf h\u01a1n, nh\u1eb9 h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n qu\u1ea1t l\u00e0m m\u00e1t.<\/p>\n<p>Ki\u1ec3u thi\u1ebft k\u1ebf l\u00e0m m\u00e1t b\u1eb1ng \u0111\u1ed1i l\u01b0u n\u00e0y l\u00e0 duy nh\u1ea5t v\u00e0o th\u1eddi \u0111i\u1ec3m \u0111\u00f3. C\u00f4ng ngh\u1ec7 n\u00e0y \u0111\u00e3 t\u1ef1 t\u1ed3n t\u1ea1i v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u00e0ng ch\u1ee5c \u1ee9ng d\u1ee5ng ti\u00eau d\u00f9ng. B\u1ed9 ngu\u1ed3n PC c\u1ee7a IBM c\u0169ng \u0111\u00e3 chuy\u1ec3n sang ch\u1ebf \u0111\u1ed9 chuy\u1ec3n \u0111\u1ed5i, m\u1eb7c d\u00f9 c\u00f3 qu\u1ea1t l\u00e0m m\u00e1t t\u01b0\u01a1ng t\u1ef1 nh\u01b0 qu\u1ea1t h\u1ecd s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 ngu\u1ed3n ki\u1ec3u ATX ng\u00e0y nay.<\/p>\n<p>V\u00e0o cu\u1ed1i nh\u1eefng n\u0103m 1980 v\u00e0 \u0111\u1ea7u nh\u1eefng n\u0103m 1990, ch\u00fang t\u00f4i \u0111\u00e3 r\u1ea5t ng\u1ea1c nhi\u00ean khi c\u00e1c b\u1ed9 ngu\u1ed3n 3 x 5\u201d ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p ra \u0111\u1eddi v\u1edbi \u0111\u1ea7u v\u00e0o t\u1ef1 \u0111\u1ed9ng thay \u0111\u1ed5i ph\u1ea1m vi, c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft li\u1ec7u n\u00f3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi 120VAC hay 230VAC v\u00e0 \u0111i\u1ec1u ch\u1ec9nh cho ph\u00f9 h\u1ee3p. C\u00e1c s\u1ea3n ph\u1ea9m n\u00e0y c\u00f3 c\u00f4ng su\u1ea5t 25 \u2013 40W ho\u1eb7c 1,66 \u0111\u1ebfn 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? I recently had lunch with a customer we\u2019ve worked with since the late 1990s. We\u2019ve seen a lot of change in that time and, as the main course arrived, we started talking about how power supply technology has advanced over the years. This has been most&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":375,"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":0,"href":"https:\/\/www.wehopower.com\/vi\/wp-json\/wp\/v2\/news\/805\/revisions"}],"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","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}