{"id":27667,"date":"2025-05-22T09:00:47","date_gmt":"2025-05-22T01:00:47","guid":{"rendered":"https:\/\/techclass.wfjydl.com\/?p=27667"},"modified":"2025-11-13T16:56:20","modified_gmt":"2025-11-13T08:56:20","slug":"%e7%ba%bf%e6%80%a7%e7%a8%b3%e5%8e%8b%e5%99%a8ic%e7%9a%84%e6%95%88%e7%8e%87%e4%b8%8e%e7%83%ad%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"https:\/\/techclass.wfjydl.com\/knowledge\/dcdc\/dcdc-ldo\/18802","title":{"rendered":"\u7ebf\u6027\u7a33\u538b\u5668IC\u7684\u6548\u7387\u4e0e\u70ed\u8bbe\u8ba1"},"content":{"rendered":"\\(\\)\n

\u7ebf\u6027\u7a33\u538b\u5668\u6548\u7387\u7684\u8ba1\u7b97\u65b9\u6cd5<\/h2>\n

\u5bf9\u4e8e\u4f7f\u7528\u4e86\u7ebf\u6027\u7a33\u538b\u5668\u7684\u7535\u6e90\uff0c\u5176\u6548\u7387\u53ef\u901a\u8fc7\u4e0b\u9762\u7684\u516c\u5f0f\u8ba1\u7b97\u5f97\u51fa\u3002\u57fa\u672c\u4e0a\u6548\u7387\u03b7\u662f\u8f93\u51fa\u529f\u7387\uff08\\(P_{OUT}\\)\uff09\u4e0e\u8f93\u5165\u529f\u7387\uff08\\(P_{IN}\\)\uff09\u4e4b\u6bd4\uff0c\u8fd9\u4e00\u539f\u7406\u65e0\u8bba\u5bf9\u4e8e\u7ebf\u6027\u7a33\u538b\u5668\u8fd8\u662f\u5bf9\u4e8e\u5f00\u5173\u7a33\u538b\u5668\u90fd\u901a\u7528\u3002\u5176\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n

\\(
\n\\eta = \\frac{P_{OUT}}{P_{IN}} = \\frac{V_{OUT} \\times I_{OUT}}{V_{CC} \\times (I_{OUT} + I_{CC})} \\times 100[\uff05]\\)<\/span><\/p>\n

\\(V_{CC}\\)\uff1a\u8f93\u5165\u7535\u538b [V]\n\\(V_{OUT}\\)\uff1a\u8f93\u51fa\u7535\u538b [V]\n\\(I_{OUT}\\)\uff1a\u8f93\u51fa\u7535\u6d41 [A]\n\\(I_{CC}\\)\uff1aIC\u7684\u7535\u8def\u7535\u6d41 [A]\n

\u4f5c\u4e3a\u6761\u4ef6\uff0c\u5f53\\(I_{CC}\\)\u76f8\u5bf9\u4e8e\\(I_{OUT}\\)\u975e\u5e38\u5c0f\uff08\\(I_{CC}\\)\u226a\\(I_{OUT}\\)\uff09\u65f6\uff0c\u53ef\u7528\u4e0b\u9762\u7684\u516c\u5f0f\u8ba1\u7b97\uff1a<\/p>\n

\\(\\eta = \\frac{V_{OUT}}{V_{CC}}\\times 100[\uff05]\\)<\/span><\/p>\n

\u901a\u8fc7\u516c\u5f0f\u53ef\u4ee5\u770b\u51fa\uff0c\u8f93\u5165\u8f93\u51fa\u4e4b\u95f4\u7684\u7535\u538b\u5dee\u8d8a\u5c0f\uff0c\u6548\u7387\u8d8a\u9ad8\u3002\u4f46\u662f\uff0c\u9700\u8981\u5728\u8003\u8651\u5230\u8f93\u5165\u8f93\u51fa\u7535\u538b\u5dee\u5bf9\u5de5\u4f5c\u7279\u6027\u7684\u5f71\u54cd\u7684\u524d\u63d0\u4e0b\u6765\u786e\u5b9a\u3002<\/p>\n

 <\/p>\n

\u7ebf\u6027\u7a33\u538b\u5668IC\u7684\u70ed\u8bbe\u8ba1<\/h2>\n

\u5728\u4f7f\u7528\u4e86\u7ebf\u6027\u7a33\u538b\u5668IC\u7684\u7535\u6e90\u8bbe\u8ba1\u4e2d\uff0c\u70ed\u8bbe\u8ba1\u662f\u4e0d\u53ef\u6216\u7f3a\u4e14\u81f3\u5173\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u672c\u8282\u5c06\u4ecb\u7ecd\u57fa\u4e8e\u70ed\u7279\u6027\u53c2\u6570\\(\u03a8_{JT}\\)\u7684\u70ed\u8ba1\u7b97\u65b9\u6cd5\uff0c\u4ee5\u53ca\u57fa\u4e8e\u70ed\u963b\\(\u03b8_{JA}\\)\u7684\u70ed\u8ba1\u7b97\u65b9\u6cd5\u3002<\/p>\n

\u8981\u60f3\u786e\u4fdd\u9ad8\u53ef\u9760\u6027\u5de5\u4f5c\uff0c\u5c31\u9700\u8981\u786e\u4fddIC\u7684\u7ed3\u6e29\\(T_J\\)\u4e0d\u8d85\u8fc7\u7edd\u5bf9\u6700\u5927\u989d\u5b9a\u503c\\(T_{JMAX}\\)150\u2103\uff0a1<\/sup>\u3002\\(T_J\\)\u7684\u4f30\u7b97\u53ef\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u8ba1\u7b97\u5f97\u51fa\u3002
\n*1\uff1a\u8fd9\u91cc\u6307\u7684\u662fBDxxIC0\u7cfb\u5217\u7684\u60c5\u51b5\u3002\u8bf7\u52a1\u5fc5\u9488\u5bf9\u6bcf\u79cdIC\u786e\u8ba4\u5176\u6280\u672f\u89c4\u683c\u4e66\u3002<\/span><\/p>\n

 <\/p>\n

\u4f7f\u7528\u70ed\u7279\u6027\u53c2\u6570\\(\u03a8_{JT}\\)\u7684\u70ed\u8ba1\u7b97<\/h3>\n

\u901a\u8fc7\u6d4b\u91cf\u8868\u9762\u6e29\u5ea6\u6765\u4f30\u7b97IC\u7684\\(T_J\\)\u65f6\uff0c\u9700\u4f7f\u7528\u70ed\u7279\u6027\u53c2\u6570\\(\u03a8_{JT}\\)\u8fdb\u884c\u8ba1\u7b97\u3002\u82e5\u80fd\u5c06\u70ed\u7535\u5076\u7262\u56fa\u5730\u56fa\u5b9a\u5728\u5c01\u88c5\u4e0a\u8868\u9762\u4e2d\u5fc3\u4f4d\u7f6e\uff0c\u5373\u53ef\u7cbe\u786e\u6d4b\u91cf\u5c01\u88c5\u4e0a\u8868\u9762\u4e2d\u5fc3\u6e29\u5ea6\\(T_T\\)\uff0c\u4ece\u800c\u8fd0\u7528\u70ed\u7279\u6027\u53c2\u6570\u8ba1\u7b97\u51fa\u9ad8\u7cbe\u5ea6\u7684\\(T_J\\)\u503c\u3002<\/p>\n

\\(T_J = T_T + \\psi_{JT} \\times P[\u2103]\\)<\/span><\/p>\n

\\(T_T\\)\uff1a\u5c01\u88c5\u4e0a\u8868\u9762\u4e2d\u5fc3\u6e29\u5ea6 [\u2103]\n\\(\u03a8_{JT}\\)\uff1a\u7ed3\u70b9\u81f3\u5c01\u88c5\u4e0a\u8868\u9762\u4e2d\u5fc3\u7684\u70ed\u7279\u6027\u53c2\u6570 [\u2103\/W]\n\\(P\\)\uff1aIC\u7684\u529f\u8017 [W]\n

\\(P\\)\u8868\u793aIC\u7684\u529f\u8017\uff0c\u53ef\u901a\u8fc7\u4e0b\u9762\u7684\u516c\u5f0f\u8ba1\u7b97\u5f97\u51fa\uff1a<\/p>\n

\\(P = (V_{CC} \u2013 V_{OUT}) \\times I_{OUT} + (V_{CC} \\times I_{CC}) [W]\\)<\/span><\/p>\n

\\(V_{CC}\\)\uff1a\u8f93\u5165\u7535\u538b [V]\n\\(V_{OUT}\\)\uff1a\u8f93\u51fa\u7535\u538b [V]\n\\(I_{OUT}\\)\uff1a\u8f93\u51fa\u7535\u6d41 [A]\n\\(I_{CC}\\)\uff1aIC\u7684\u7535\u8def\u7535\u6d41 [A]\n

\u53e6\u5916\uff0c\u8fde\u7eed\u53ef\u8f93\u51fa\u7684\u6700\u5927\u7535\u6d41\u503c\u53ef\u901a\u8fc7\u4e0b\u9762\u7684\u516c\u5f0f\u8ba1\u7b97\u5f97\u51fa\uff1a<\/p>\n

\\(I_{OUT(MAX)} = \\frac{T_{J(MAX)} \u2013 T_T}{(V_{CC} \u2013 V_{OUT}) \\times \\psi_{JT}} [A]\\)<\/span><\/p>\n

\\(T_{JMAX}\\)\uff1a\u7ed3\u6e29\u7684\u7edd\u5bf9\u6700\u5927\u989d\u5b9a\u503c [\u2103]\n\\(T_T\\)\uff1a\u5c01\u88c5\u4e0a\u8868\u9762\u4e2d\u5fc3\u6e29\u5ea6 [\u2103]\n\\(\u03a8_{JT}\\)\uff1a\u7ed3\u70b9\u81f3\u5c01\u88c5\u4e0a\u8868\u9762\u4e2d\u5fc3\u7684\u70ed\u7279\u6027\u53c2\u6570 [\u2103\/W]\n\\(V_{CC}\\)\uff1a\u8f93\u5165\u7535\u538b[V]\n\\(V_{OUT}\\)\uff1a\u8f93\u51fa\u7535\u538b [V]\n

 <\/p>\n

\u4f7f\u7528\u70ed\u963b\\(\u03b8_{JA}\\)\u7684\u70ed\u8ba1\u7b97<\/h3>\n

\u5229\u7528\u70ed\u963b\\(\u03b8_{JA}\\)\u53ef\u8f7b\u677e\u4f30\u7b97\u51fa\\(T_J\\)\u3002<\/p>\n

\\(T_J = T_A + \\theta_{JA} \\times P[\u2103]\\)<\/span><\/p>\n

\\(T_A\\)\uff1a\u73af\u5883\u6e29\u5ea6 [\u2103]\n\\(\u03b8_{JA}\\)\uff1a\u7ed3\u70b9\u81f3\u5468\u56f4\u73af\u5883\u7684\u70ed\u963b [\u2103\/W]\n\\(P\\)\uff1aIC\u7684\u529f\u8017 [W]\n

\u53e6\u5916\uff0c\u8fde\u7eed\u53ef\u8f93\u51fa\u7684\u6700\u5927\u7535\u6d41\u503c\u53ef\u901a\u8fc7\u4e0b\u9762\u7684\u516c\u5f0f\u8ba1\u7b97\u5f97\u51fa\uff1a<\/p>\n

\\(I_{OUT(MAX)} = \\frac{T_{J(MAX)} \u2013 T_A}{(V_{CC} \u2013 V_{OUT}) \\times \\theta_{JA}} [A]\\)<\/span><\/p>\n

\\(T_{JMAX}\\)\uff1a\u7ed3\u6e29\u7684\u7edd\u5bf9\u6700\u5927\u989d\u5b9a\u503c[\u2103]\n\\(T_A\\)\uff1a\u5468\u56f4\u73af\u5883\u6e29\u5ea6 [\u2103]\n\\(\u03b8_{JA}\\)\uff1a\u7ed3\u70b9\u81f3\u5468\u56f4\u73af\u5883\u7684\u70ed\u963b [\u2103\/W]\n\\(V_{CC}\\)\uff1a\u8f93\u5165\u7535\u538b [V]\n\\(V_{OUT}\\)\uff1a\u8f93\u51fa\u7535\u538b [V]\n

 <\/p>\n

\u4e0b\u8868\u6240\u793a\u7684\u70ed\u7279\u6027\u53c2\u6570\\(\u03a8_{JT}\\)\u53ca\u70ed\u963b\\(\u03b8_{JA}\\)\u7684\u5b9e\u6d4b\u503c\u793a\u4f8b<\/h3>\n

\u4e0b\u8868\u6240\u793a\u7684\u70ed\u7279\u6027\u53c2\u6570\\(\u03a8_{JT}\\)\u53ca\u70ed\u963b\\(\u03b8_{JA}\\)\u662f\u5728\u7279\u5b9aPCB\uff08\u5370\u5237\u7535\u8def\u677f\uff09\u4e0a\u6d4b\u5f97\u7684\u503c\u3002\u6563\u70ed\u6027\u80fd\u4f1a\u56e0PC\u53c2\u6570\u3001\u94dc\u7b94\u5e03\u5c40\u3001\u5143\u5668\u4ef6\u914d\u7f6e\u3001\u5916\u58f3\u5f62\u72b6\u53ca\u5468\u56f4\u73af\u5883\u7b49\u56e0\u7d20\u7684\u5f71\u54cd\u800c\u53d8\u5316\uff0c\u56e0\u6b64\u70ed\u7279\u6027\u53c2\u6570\u548c\u70ed\u963b\u503c\u4e5f\u4f1a\u968f\u4e4b\u6539\u53d8\u3002\u56e0\u6b64\uff0c\u9700\u8981\u8003\u8651\u5230\u8be5\u6570\u503c\u53ef\u80fd\u4e0e\u5728\u5b9e\u9645\u7535\u8def\u677f\u4e0a\u7684\u6d4b\u91cf\u503c\u5b58\u5728\u5dee\u5f02\u3002<\/p>\n

\"\u71b1\u7279\u6027\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u03a8JT\u304a\u3088\u3073\u71b1\u62b5\u6297\u03b8JA\u306e\u5b9f\u6e2c\u5024\u4f8b\"<\/p>\n

\u6b64\u5916\uff0c\u6d4b\u91cf\u6240\u7528PCB\u7684\u89c4\u683c\u5982\u4e0b\u3002\u5168\u90e8\u9002\u7528\u4e8eHTSOP-J8\u5c01\u88c5\uff0c\u4f9d\u6b21\u4e3a1\u5c42\uff081s\uff09\u7535\u8def\u677f\uff08\u7b26\u5408JESD51-3\/-7\u6807\u51c6\uff09\u30012\u5c42\uff082s\uff09\u7535\u8def\u677f\uff08\u7b26\u5408JESD51-3\/-5\/-7\u6807\u51c6\uff09\u30014\u5c42\uff082s2p\uff09\u7535\u8def\u677f\uff08\u7b26\u5408JESD51-3\/-5\/-7\u6807\u51c6\uff09\u3002<\/p>\n

\"HTSOP-J8<\/p>\n

\"HTSOP-J8<\/p>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"\u7ebf\u6027\u7a33\u538b\u5668\u6548\u7387\u7684\u8ba1\u7b97\u65b9\u6cd5 \u5bf9\u4e8e\u4f7f\u7528\u4e86\u7ebf\u6027\u7a33\u538b\u5668\u7684\u7535\u6e90\uff0c\u5176\u6548\u7387\u53ef\u901a\u8fc7\u4e0b\u9762\u7684\u516c\u5f0f\u8ba1\u7b97\u5f97\u51fa\u3002\u57fa\u672c\u4e0a\u6548\u7387\u03b7\u662f\u8f93\u51fa\u529f\u7387\uff08\\(P_{OUT}\\)\uff09\u4e0e\u8f93\u5165\u529f\u7387\uff08\\(P_{IN}\\)\uff09\u4e4b\u6bd4\uff0c\u8fd9\u4e00\u539f\u7406\u65e0\u8bba\u5bf9\u4e8e\u7ebf\u6027\u7a33\u538b\u5668\u8fd8\u662f\u5bf9\u4e8e\u5f00\u5173\u7a33\u538b\u5668\u90fd […]","protected":false},"author":4,"featured_media":27678,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2559],"tags":[2546,2558,2557,2556,2555,2554,2553,2552,2551,2550,2549,2548,2547,28,2545,2544,2543,2189,2188,2187,2186,2183,2182,2181,87,32],"class_list":["post-27667","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dcdc-ldo06","tag-bd00ic0wefj","tag-ldo","tag-2557","tag-2555","tag-2554","tag-gnd","tag-bdxxic0whfv","tag-bdxxic0mefj-m","tag-bdxxic0mefj-lb","tag-bd00ic0whfv","tag-bd00ic0mefj-m","tag-bd00ic0mefj-lb","tag-bdxxic0","tag-bdxxic0wefj","tag-2543","tag-2189","tag-ba1117","tag-2187","tag-2186","tag-2182","tag-2181","tag-32"],"acf":[],"wps_subtitle":"","_links":{"self":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/27667","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\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/comments?post=27667"}],"version-history":[{"count":12,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/27667\/revisions"}],"predecessor-version":[{"id":27669,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/27667\/revisions\/27669"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/media\/27678"}],"wp:attachment":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/media?parent=27667"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/categories?post=27667"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/tags?post=27667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}