{"id":2942,"date":"2016-06-01T01:00:49","date_gmt":"2016-05-31T16:00:49","guid":{"rendered":"http:\/\/micro.rohm.com\/en\/techweb\/?p=2942"},"modified":"2022-04-11T13:38:33","modified_gmt":"2022-04-11T05:38:33","slug":"efficiency-and-thermal-calculation","status":"publish","type":"post","link":"https:\/\/techclass.wfjydl.com\/knowledge\/dcdc\/s-dcdc\/01-s-dcdc\/82","title":{"rendered":"\u6548\u7387\u548c\u70ed\u8ba1\u7b97"},"content":{"rendered":"<p>\u73b0\u5728\u8bf4\u660e\u7ebf\u6027\u7a33\u538b\u5668\u7684\u6548\u7387\u548c\u70ed\u8ba1\u7b97\u3002\u5982\u524d\u8ff0\uff0c\u8fd9\u662f\u4f7f\u7528\u7ebf\u6027\u7a33\u538b\u5668\u6240\u5fc5\u987b\u63a2\u8ba8\u7684\u4e8b\u9879\u3002<\/p>\n<p><strong>\u7ebf\u6027\u7a33\u538b\u5668\u7684\u6548\u7387<\/strong><br \/>\n<div id=\"attachment_383\" style=\"width: 370px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-383\" src=\"\n\/upload\/2016\/03\/fig_24.gif\" alt=\"\u56fe 24\" width=\"360\" height=\"201\" \/><p id=\"caption-attachment-383\" class=\"wp-caption-text\">\u56fe 24<\/p><\/div>\n<p>\u6548\u7387\u7684\u5b9a\u4e49\u4e3a\u8f6c\u6362\u8f93\u51fa\u529f\u7387\u5bf9\u6240\u8f93\u5165\u529f\u7387\u7684\u6bd4\uff0c\u901a\u5e38\u4ee5%\u663e\u793a\u3002\u8fd9\u5728\u5f00\u5173\u7a33\u538b\u5668\u65b9\u9762\u4e5f\u4e00\u6837\u3002\u4ee5\u4e0b\u516c\u5f0f\u4e2d\uff0c\u8f93\u5165\u7535\u6d41I<sub>IN<\/sub>\u6240\u542b\u7684I<sub>CC<\/sub>\u662fIC\u672c\u8eab\u7684\u6d88\u8017\u7535\u6d41\u3002\u4f46\u662f\uff0c\u56e0\u5176\u503c\u5c0f\uff0c\u6240\u4ee5\u8d1f\u8f7d\u7535\u6d41\u5927\u65f6\u53ef\u4ee5\u5ffd\u89c6\u3002\u6b64\u65f6\uff0c\u56e0\u53ef\u4ee5\u4f7f\u8f93\u5165\u4e0e\u8f93\u51fa\u7684\u7535\u6d41\u76f8\u540c\uff0c\u6240\u4ee5\u53ea\u8981\u7eaf\u7cb9\u4ee5\u8f93\u5165\u7535\u538b\u9664\u8f93\u51fa\u7535\u538b\u4fbf\u53ef\u4ee5\u8ba1\u7b97\u3002<br \/>\n\u56fe24\u4f8b\u4e2d\uff0c5V\u8f6c\u6362\u62103.3V\u7684\u6548\u7387\u4e3a64%\u3002\u8fd1\u5e74\u6765\u5f00\u5173\u7a33\u538b\u5668\u7684\u6548\u7387\u572880%\uff5e90%\u4ee5\u4e0a\uff0c\u56e0\u6b6464%\u975e\u5e38\u4f4e\u4e86\u3002<\/p>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u8bd5\u7740\u5c06\u56fe24\u4f8b\u7684\u8f93\u5165\u7535\u538b5V\u53d8\u66f4\u4e3a3.6V\u770b\u770b\u30025V\u53ef\u4ee5\u770b\u6210\u662f\u7cfb\u7edf\u7535\u538b\uff0c\u800c3.6V\u5219\u662f\u9502\u79bb\u5b50\u4e8c\u6b21\u7535\u6c60\u7684\u7535\u538b\u3002<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-384\" src=\"https:\/\/techweb.rohm.com.tw\/upload\/for_2.jpg\" alt=\"for_2\" \/><\/p>\n<div id=\"attachment_385\" style=\"width: 311px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-385\" src=\"\n\/upload\/2016\/03\/fig_25.gif\" alt=\"\u56fe 25:\u635f\u8017\u529f\u7387\" width=\"300\" height=\"192\" \/><p id=\"caption-attachment-385\" class=\"wp-caption-text\">\u56fe 25:\u635f\u8017\u529f\u7387<\/p><\/div>\n<p>\u5728\u8fd9\u79cd\u6761\u4ef6\u4e0b\u7684\u6548\u7387\u5c45\u7136\u670989%\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5373\u4f7f\u662f\u7ebf\u6027\u7a33\u538b\u5668\uff0c\u5982\u679c\u8f93\u5165\u548c\u8f93\u51fa\u7684\u7535\u538b\u5dee\u5c0f\u7684\u8bdd\u6548\u7387\u4e5f\u662f\u53d8\u9ad8\uff0c\u53ef\u4ee5\u83b7\u5f97\u76f8\u540c\u4e8e\u5f00\u5173\u7a33\u538b\u5668\u7684\u9ad8\u6548\u7387\u3002\u9996\u5148\uff0c\u770b\u56fe25\u4fbf\u4e00\u76ee\u4e86\u7136\uff0c\u5982\u679cV<sub>IN<\/sub>\u63a5\u8fd1\u538b\u5dee\u7535\u538bV<sub>DROPOUT<\/sub>\u7684\u8bdd\uff0c\u529f\u7387\u635f\u8017\u4f1a\u51cf\u5c11\uff0c\u6548\u7387\u4f1a\u53d8\u9ad8\u3002<\/p>\n<p>\u5982\u679c\u662f\u8fd9\u6837\u7684\u6761\u4ef6\uff0c\u5219LDO\u7684\u8d21\u732e\u5ea6\u5c31\u53d8\u5f97\u975e\u5e38\u9ad8\u3002\u8fd9\u79cd\u6761\u4ef6\u4e0b\uff0c\u7531\u4e8e\u8f93\u51fa\u8f93\u5165\u5dee\u4e3a0.3V\uff0c\u7ebf\u6027\u7a33\u538b\u5668\u7684\u9009\u62e9\u4e3aLDO\uff0c\u800c\u4e14\u662f\u538b\u5dee\u7535\u538b\u4e3a0.3V\u4ee5\u4e0b\u7684LDO\u3002\u6807\u51c6\u578b\u7ebf\u6027\u7a33\u538b\u5668\u65e0\u6cd5\u652f\u6301\u8fd9\u79cd\u6761\u4ef6\uff0c\u5982\u679c\u786c\u8981\u4f7f\u7528\u6807\u51c6\u578b\u7684\u8bdd\uff0c\u8f93\u5165\u7535\u538b\u5fc5\u987b\u57286.3V\u4ee5\u4e0a\uff08\u538b\u5dee\u7535\u538b\u8bbe\u4e3a3V\uff09\uff0c\u800c\u4e14\u65e0\u6cd5\u5904\u7406\u6700\u521d\u76845V\u8f93\u5165\u6761\u4ef6\u3002\u6b64\u5916\uff0c\u6548\u7387\u4e5f\u4f1a\u964d\u4e3a52%\u3002\u53cd\u4e4b\uff0c\u4ece12V\u5236\u4f5c5V\u65f6\uff0c\u4e0d\u7ba1\u662fLDO\u6216\u662f\u6807\u51c6\u578b\uff0c\u6548\u7387\u6216\u635f\u8017\u90fd\u4e0d\u4f1a\u6539\u53d8\u3002<\/p>\n<p>\u7ebf\u6027\u7a33\u538b\u5668\u7684\u6548\u7387\u4f9d\u8d56\u8f93\u51fa\u8f93\u5165\u7535\u538b\u5dee\u3002\u5bf9\u4e8e\u53ef\u4ee5\u5c06\u8f93\u51fa\u7535\u538b\u5dee\u964d\u5230\u591a\u5c0f\uff0c\u867d\u7136\u4e0e\u538b\u5dee\u7535\u538b\u6709\u5173\u7cfb\uff0c\u4e0d\u8fc7\u4e0e\u6548\u7387\u6ca1\u6709\u76f4\u63a5\u5173\u7cfb\u53ef\u4ee5\u4ece\u516c\u5f0f\u4e2d\u538b\u5dee\u7535\u538b\u4e00\u9879\u6e05\u695a\u5f97\u77e5\u3002\u6b64\u70b9\u8bf7\u52ff\u6df7\u6dc6\u3002<\/p>\n<div id=\"keypoint-dcdc\" class=\"keypoint indent\" style=\"margin-bottom: 25px;\">\n<h2>\u5173\u952e\u8981\u70b9:<\/h2>\n<p>\u30fb\u6548\u7387\u662f\u529f\u7387\u8f6c\u6362\u6548\u7387\u7684\u610f\u601d\uff0c\u7ebf\u6027\u7a33\u538b\u5668\u548c\u5f00\u5173\u7a33\u538b\u5668\u3002<\/p>\n<p>\u30fb\u7ebf\u6027\u7a33\u538b\u5668\u5982\u679c\u5982\u679c\u603b\u7ed3\u6761\u4ef6\u7684\u8bdd\uff0c\u4e5f\u53ef\u83b7\u5f97\u4e0e\u5f00\u5173\u7a33\u538b\u5668\u76f8\u540c\u7684\u6548\u7387\u3002<\/p>\n<p>\u30fb\u56fe25\uff1a\u5982\u4f55\u5c06\u529f\u7387\u635f\u8017\u964d\u81f3\u6700\u5c11\uff0c\u662f\u63d0\u5347\u7ebf\u6027\u7a33\u538b\u5668\u6548\u7387\u7684\u5173\u952e\u3002<\/p>\n<\/div>\n<p><strong>\u7ebf\u6027\u7a33\u538b\u5668\u7684\u70ed\u8ba1\u7b97<\/strong><\/p>\n<p>\u70ed\u8ba1\u7b97\u9700\u8981\u529f\u7387\u635f\u8017\u3001\u5c01\u88c5\u7684\u70ed\u963b\u3001\u4ee5\u53ca\u5468\u56f4\u6e29\u5ea6\u7b49\u4fe1\u606f\u3002\u529f\u7387\u635f\u8017\u4e0e\u6548\u7387\u8ba1\u7b97\u7684\u8ba1\u7b97\u65b9\u6cd5\u76f8\u540c\uff0c\u7eaf\u7cb9\u4e3a\u8f93\u51fa\u8f93\u5165\u7535\u538b\u5dee\u548c\u8f93\u5165\u7535\u6d41\u76f8\u4e58\u7684\u503c\u3002\u70ed\u963b\u5e94\u8be5\u6709\u8bb0\u8f7d\u6280\u672f\u89c4\u683c\uff0c\u6ca1\u6709\u65f6\u5219\u6709\u5fc5\u8981\u8be2\u95ee\u5382\u5546\u3002\u57fa\u672c\u4e0a\u4f7f\u7528\u82af\u7247\uff08\u63a5\u5408\u9762Junction\uff09\u548c\u5468\u56f4\uff08Ambient\uff09\u95f4\u7684\u70ed\u963b\u3001\u03b8ja\u3002\u5c3d\u7ba1\u6709\u4e9bIC\u53ef\u63d0\u4f9b\u5230\u5916\u58f3\u7684\u70ed\u963b\u03b8jc\uff0c\u7136\u800c\u8fd8\u662f\u5f97\u6c42\u5230\u03b8ja\u4e3a\u6b62\u7684\u70ed\u963b\u3002\u6700\u540e\u662f\u5468\u56f4\u6e29\u5ea6\uff0c\u8fd9\u4e2a\u53ef\u4ee5\u6839\u636e\u6574\u673a\u7684\u989d\u5b9a\u503c\u6765\u63a8\u7b97\uff0c\u5982\u4ee550\u2103\u6765\u4f30\u7b97\u4e5f\u53ef\u3002\u5982\u679c\u8981\u6c42\u6761\u4ef6\u8f83\u9ad8\u65f6\uff0c\u987b\u8fdb\u884c\u5b9e\u6d4b\u3002<\/p>\n<div id=\"attachment_386\" style=\"width: 450px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-386\" src=\"\/upload\/2016\/03\/fig_26.gif\" alt=\"\u56fe 26\" width=\"440\" height=\"189\" \/><p id=\"caption-attachment-386\" class=\"wp-caption-text\">\u56fe 26<\/p><\/div>\n<p>\u60f3\u6cd5\u5982\u4e0b\uff0c\u53ef\u4ee5\u6839\u636e\u529f\u7387\u635f\u8017\u548c\u70ed\u963b\u6c42IC\u82af\u7247\u7684\u53d1\u70ed\u540e\u518d\u52a0\u5165\u5468\u56f4\u6e29\u5ea6\u540e\u6c42\u82af\u7247\u7684\u6e29\u5ea6\uff0c\u786e\u8ba4\u5df2\u8ba1\u7b97\u7684Tj\uff08\u82af\u7247\u6e29\u5ea6\uff09\u662f\u5426\u6ca1\u6709T<sub>jmax<\/sub>\uff08\u82af\u7247\u6e29\u5ea6\u7684\u6700\u5927\u989d\u5b9a\uff09\u3002\u5982\u679c\u5df2\u8d85\u8fc7T<sub>jmax<\/sub>\u65f6\u987b\u53d8\u66f4\u4efb\u4e00\u6761\u4ef6\u3002\u524d\u9879\u5df2\u7ecf\u8bf4\u660e\uff0c\u5e76\u975e\u5168\u90e8\u90fd\u80fd\u5982\u89c4\u683c\u822c\u4f7f\u7528\uff0c\u4f9d\u636e\u8f93\u51fa\u8f93\u5165\u7535\u538b\u3001\u8f93\u51fa\u7535\u6d41\u3001\u5468\u56f4\u6e29\u5ea6\u800c\u53d7\u5230\u9650\u5236\u3002<\/p>\n<p>\u4e00\u822c\u6765\u8bf4\uff0c\u8d85\u8fc7\u989d\u5b9a\u800c\u53ef\u4ee5\u53d8\u66f4\u8f93\u5165\u7535\u538b\u6216\u8f93\u51fa\u7535\u538b\u7684\u4f8b\u5b50\u5e94\u8be5\u4e0d\u591a\u3002\u6216\u8bb8\u53ef\u4ee5\u51cf\u5c11\u8d1f\u8f7d\u7535\u6d41\uff08\u8f93\u51fa\u7535\u6d41\uff09\u6765\u4f5c\u4e3a\u5904\u7406\u65b9\u5f0f\u3002\u6b64\u65f6\uff0c\u63a5\u53d7\u529f\u7387\u4f9b\u7ed9\u7684\u88c5\u7f6e\u987b\u5c3d\u91cf\u9009\u62e9\u6d88\u8017\u7535\u6d41\u5c11\u7684\u3002\u5176\u4ed6\u53ef\u80fd\u7684\u65b9\u6cd5\u8fd8\u6709\u964d\u4f4e\u5468\u56f4\u6e29\u5ea6\u3002\u4f8b\u5982\uff0c\u4ece\u81ea\u7136\u5bf9\u6d41\u7a7a\u51b7\u53d8\u66f4\u4e3a\u98ce\u6247\u51b7\u5374\u3001\u5df2\u6709\u98ce\u6247\u7684\u8bdd\u5c31\u63d0\u5347\u51b7\u5374\u80fd\u529b\u3001\u91cd\u65b0\u8bc4\u4f30\u5bf9\u6d41\u7b49\u3002\u6b64\u5916\uff0c\u867d\u7136\u8fd8\u6709\u5728\u7ebf\u6027\u7a33\u538b\u5668\u5b89\u88c5\u6563\u70ed\u7247\u6765\u964d\u4f4e\u70ed\u963b\u53ca\u51cf\u4f4e\u53d1\u7684\u65b9\u6cd5\uff0c\u4e0d\u8fc7\u6563\u70ed\u7247\u7684\u6210\u672c\u548c\u5c3a\u5bf8\u60f3\u5fc5\u662f\u5f88\u5927\u7684\u63a2\u8ba8\u4e8b\u9879\u3002\u800c\u4e14\uff0c\u5728\u63d0\u5347\u7535\u6e90\u6548\u7387\u51cf\u5c11\u53d1\u70ed\u7684\u89c2\u70b9\u4e0a\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u4e0b\u4e00\u9879\u6240\u8bf4\u660e\u7684\u5f00\u5173\u7a33\u538b\u5668\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u73b0\u5728\u8bf4\u660e\u7ebf\u6027\u7a33\u538b\u5668\u7684\u6548\u7387\u548c\u70ed\u8ba1\u7b97\u3002\u5982\u524d\u8ff0\uff0c\u8fd9\u662f\u4f7f\u7528\u7ebf\u6027\u7a33\u538b\u5668\u6240\u5fc5\u987b\u63a2\u8ba8\u7684\u4e8b\u9879\u3002 \u7ebf\u6027\u7a33\u538b\u5668\u7684\u6548\u7387 \u6548\u7387\u7684\u5b9a\u4e49\u4e3a\u8f6c\u6362\u8f93\u51fa\u529f\u7387\u5bf9\u6240\u8f93\u5165\u529f\u7387\u7684\u6bd4\uff0c\u901a\u5e38\u4ee5%\u663e\u793a\u3002\u8fd9\u5728\u5f00\u5173\u7a33\u538b\u5668\u65b9\u9762\u4e5f\u4e00\u6837\u3002\u4ee5\u4e0b\u516c\u5f0f\u4e2d\uff0c\u8f93\u5165\u7535\u6d41IIN\u6240\u542b\u7684ICC\u662f [&hellip;]","protected":false},"author":1,"featured_media":16985,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[33],"tags":[87,88,89,90,91],"class_list":["post-2942","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-01-s-dcdc","tag-ldo","tag-88","tag-89","tag-90","tag-91"],"acf":[],"wps_subtitle":"","_links":{"self":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/2942","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/comments?post=2942"}],"version-history":[{"count":6,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/2942\/revisions"}],"predecessor-version":[{"id":11715,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/2942\/revisions\/11715"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/media\/16985"}],"wp:attachment":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/media?parent=2942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/categories?post=2942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/tags?post=2942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}