{"id":409,"date":"2020-10-28T13:34:16","date_gmt":"2020-10-28T13:34:16","guid":{"rendered":"http:\/\/people.utm.my\/shahrinmdayob\/?p=409"},"modified":"2020-10-28T13:50:56","modified_gmt":"2020-10-28T13:50:56","slug":"mosfet","status":"publish","type":"post","link":"https:\/\/people.utm.my\/shahrinmdayob\/2020\/10\/28\/mosfet\/","title":{"rendered":"MOSFET"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"615\" height=\"462\" src=\"https:\/\/people.utm.my\/shahrinmdayob\/files\/2020\/10\/UYdW9kA-1.png\" alt=\"\" class=\"wp-image-412\" srcset=\"https:\/\/people.utm.my\/shahrinmdayob\/wp-content\/uploads\/sites\/1884\/2020\/10\/UYdW9kA-1.png 615w, https:\/\/people.utm.my\/shahrinmdayob\/wp-content\/uploads\/sites\/1884\/2020\/10\/UYdW9kA-1-300x225.png 300w\" sizes=\"auto, (max-width: 615px) 100vw, 615px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A single MOSFET has two states: ON and OFF.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ON: current can flow both directions<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OFF: current can flow one direction (source-drain, due to the body diode) and not the other direction (drain-source, because the FET is off)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A single MOSFET in series with a diode:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/i.stack.imgur.com\/HcobP.jpg\" alt=\"enter image description here\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">also has two states, ON and OFF.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ON: current flows one direction (drain-source, through the FET and the second diode), but not the other direction (source-drain, because the second diode is pointing the wrong way)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OFF: current won&#8217;t flow either way, because whichever way you look there&#8217;s a diode opposing the flow of current.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two MOSFETs in series, pointing opposite directions:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/i.stack.imgur.com\/oHpNV.jpg\" alt=\"enter image description here\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">have four possible states. ON-ON, ON-OFF, OFF-ON, and OFF-OFF. For this example, I&#8217;ll describe current flow with directions as seen in the picture above.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ON-ON: current can flow both directions through the circuit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ON-OFF: current can flow from left to right (through the left FET and the right diode) but not from right to left (because of the right diode)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OFF-ON: current can flow from right to left (through the right FET and the left diode) but not from left to right (because of the left diode)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OFF-OFF: current can not flow in either direction, because with both FETs off all you have is two diodes blocking current flow in either direction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So the third topology has the option of&nbsp;<em>either<\/em>&nbsp;blocking currents in both directions,&nbsp;<em>or<\/em>&nbsp;allowing current flow in either direction, depending on how it&#8217;s gated.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A single MOSFET has two states: ON and OFF. ON: current can flow both directions OFF: current can flow one direction (source-drain, due to the body diode) and not the other direction (drain-source, because the FET is off) A single MOSFET in series with a diode: also has two states, ON and OFF. ON: current [&hellip;]<\/p>\n","protected":false},"author":21440,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-409","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/people.utm.my\/shahrinmdayob\/wp-json\/wp\/v2\/posts\/409","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/people.utm.my\/shahrinmdayob\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/people.utm.my\/shahrinmdayob\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/people.utm.my\/shahrinmdayob\/wp-json\/wp\/v2\/users\/21440"}],"replies":[{"embeddable":true,"href":"https:\/\/people.utm.my\/shahrinmdayob\/wp-json\/wp\/v2\/comments?post=409"}],"version-history":[{"count":3,"href":"https:\/\/people.utm.my\/shahrinmdayob\/wp-json\/wp\/v2\/posts\/409\/revisions"}],"predecessor-version":[{"id":414,"href":"https:\/\/people.utm.my\/shahrinmdayob\/wp-json\/wp\/v2\/posts\/409\/revisions\/414"}],"wp:attachment":[{"href":"https:\/\/people.utm.my\/shahrinmdayob\/wp-json\/wp\/v2\/media?parent=409"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/people.utm.my\/shahrinmdayob\/wp-json\/wp\/v2\/categories?post=409"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/people.utm.my\/shahrinmdayob\/wp-json\/wp\/v2\/tags?post=409"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}