{"id":36481,"date":"2006-05-01T00:03:54","date_gmt":"2006-05-01T00:03:54","guid":{"rendered":"https:\/\/silvaco-stage.betagentechnologies.com\/%e6%9c%aa%e5%88%86%e7%b1%bb\/evaluating-of-the-avalanche-failure-of-power-mosfets-using-atlas\/"},"modified":"2021-10-13T10:31:16","modified_gmt":"2021-10-13T17:31:16","slug":"evaluating-of-the-avalanche-failure-of-power-mosfets-using-atlas","status":"publish","type":"post","link":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/evaluating-of-the-avalanche-failure-of-power-mosfets-using-atlas\/","title":{"rendered":"Evaluating of the Avalanche Failure of Power MOSFETs using Atlas"},"content":{"rendered":"<h1>Evaluating of the Avalanche Failure of Power MOSFETs using\u00a0<em>Atlas<\/em><\/h1>\n<h3 class=\"feature\">Introduction<\/h3>\n<p>Power MOSFETs are widely used with an inductive load for S\/W power supplies, DC-DC converters, and so on. But due to high frequency operation, the surge voltage applied to the MOSFETs at turn-off depends on the inductance and parasitic inductance in the circuit. For some operation modes, the pulse width for the turn-on or off will be very short, and the device fails due to the short surge period.<\/p>\n<p>In this article, the device simulator\u00a0<strong><em>ATLAS<\/em><\/strong>\u00a0was used to to predict the maximum inductive loads and find out the failure current due to the device intrinsic temperature.<\/p>\n<p><strong>Single Pulse Unclamped Inductive Switching<\/strong><\/p>\n<p>Figure 1 shows that the single pulse unclamped inductive switching (UIS) test circuit for avalanche testing. Figure 2 shows the traditional operation waveform (avalanche operation waveform)[1].<\/p>\n<p>The avalance current (I<sub>AV<\/sub>) depends on both the inductance value and the direction of the on time (PW). Therefore, to get a high I<sub>AV<\/sub>\u00a0a small inductance or a long on time should be chosen.<\/p>\n<p>From the circuit shown in Figure 1, the single pulse avalanche energy (E<sub>AV<\/sub>) can be calculated:<\/p>\n<p><img loading=\"lazy\" width=\"1344\" height=\"1669\" src=\"https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3.jpg\" class=\"cleaned-enfold-image\" alt=\"\" decoding=\"async\" loading=\"lazy\" srcset=\"https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3.jpg 1344w, https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3-242x300.jpg 242w, https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3-829x1030.jpg 829w, https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3-768x954.jpg 768w, https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3-1237x1536.jpg 1237w, https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3-1208x1500.jpg 1208w, https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3-568x705.jpg 568w, https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3-30x37.jpg 30w, https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3-44x55.jpg 44w, https:\/\/silvaco-stage.betagentechnologies.com\/wp-content\/uploads\/simulationstandard\/simstd_may_2006_a3-39x48.jpg 39w\" sizes=\"auto, (max-width: 1344px) 100vw, 1344px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction<\/p>\n<p>Power MOSFETs are widely used with an inductive load for S\/W power supplies, DC-DC converters, and so on. But due to high frequency operation, the surge voltage applied to the MOSFETs at turn-off depends on the inductance and parasitic inductance in the circuit. For some operation modes, the pulse width for the turn-on or off will be very short, and the device fails due to the short surge period.<\/p>\n","protected":false},"author":3,"featured_media":22240,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7723],"tags":[],"class_list":["post-36481","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-simulation-standard-zh-hans","entry","has-media"],"_links":{"self":[{"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/posts\/36481","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/comments?post=36481"}],"version-history":[{"count":1,"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/posts\/36481\/revisions"}],"predecessor-version":[{"id":36485,"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/posts\/36481\/revisions\/36485"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/media\/22240"}],"wp:attachment":[{"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/media?parent=36481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/categories?post=36481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/silvaco-stage.betagentechnologies.com\/zh-hans\/wp-json\/wp\/v2\/tags?post=36481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}