{"id":17624,"date":"2022-01-19T00:00:49","date_gmt":"2022-01-18T16:00:49","guid":{"rendered":"https:\/\/techclass.wfjydl.com\/?p=17624"},"modified":"2025-07-11T14:38:10","modified_gmt":"2025-07-11T06:38:10","slug":"%e7%86%b1%e6%8a%b5%e6%8a%97%e3%83%87%e3%83%bc%e3%82%bf%ef%bc%9atj%e3%81%ae%e8%a6%8b%e7%a9%8d%e3%82%82%e3%82%8a%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%ce%b8ja%e3%81%a8%cf%88jt-%ef%bc%8d%e3%81%9d%e3%81%ae2","status":"publish","type":"post","link":"https:\/\/techclass.wfjydl.com\/knowledge\/thermal-design\/s-thermal-design\/01-s-thermal-design\/10056","title":{"rendered":"\u70ed\u963b\u6570\u636e\uff1a\u4f30\u7b97TJ\u65f6\u6d89\u53ca\u5230\u7684\u03b8JA\u548c\u03a8JT \uff0d\u51762\uff0d"},"content":{"rendered":"<div id=\"keypoint-thermal-design\" class=\"keypoint 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rel=\"noopener\">\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d<\/a>\u4e2d\uff0c\u4ee5\u4f30\u7b97T<sub>J<\/sub>\u65f6\u80fd\u5426\u4f7f\u7528\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u4e3a\u4e3b\u9898\uff0c\u4f5c\u4e3a\u201c\u51761\u201d\u4ecb\u7ecd\u4e86\u53ef\u4ee5\u4f7f\u7528\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u8fdb\u884cT<sub>J<\/sub>\u4f30\u7b97\u3002\u672c\u6587\u4f5c\u4e3a\u201c\u51762\u201d\uff0c\u5c06\u4ecb\u7ecd\u03a8<sub>JT<\/sub>\u7684\u7279\u6027\u548c\u4f30\u7b97T<sub>J<\/sub>\u65f6\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u7684\u6709\u6548\u6027\u3002\u5982\u4e0a\u6b21\u6240\u8ff0\uff0c\u5c06\u4f1a\u5355\u72ec\u4ecb\u7ecd\u4f7f\u7528\u4e86\u70ed\u963b\u6570\u636e\u7684T<sub>J<\/sub>\u4f30\u7b97\u793a\u4f8b\u3002<\/p>\n<h2>\u4e0d\u540c\u6761\u4ef6\u4e0b\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u7684\u7279\u6027\u53ca\u6709\u6548\u6027<\/h2>\n<p>\u6b63\u5982\u4e0a\u4e00\u7bc7\u4e2d\u4ecb\u7ecd\u8fc7\u7684\uff0c\u7531\u4e8e\u03a8<sub>JT<\/sub>\u662f\u4e00\u4e2a\u8868\u793a\u76f8\u5bf9\u4e8e\u5668\u4ef6\u6574\u4f53\u7684\u529f\u8017\u7684\u3001\u7ed3\u70b9\u4e0e\u5c01\u88c5\u9876\u9762\u4e2d\u5fc3\u4e4b\u95f4\u7684\u6e29\u5ea6\u5dee\u7684\u70ed\u7279\u6027\u53c2\u6570\uff0c\u56e0\u6b64\u53ef\u4ee5\u7528\u6765\u63a8\u7b97\u5b9e\u673a\u4e2d\u5b9e\u673a\u5de5\u4f5c\u72b6\u6001\u4e0b\u7684T<sub>J<\/sub>\u3002\u7136\u800c\uff0c\u6709\u4e00\u4e9b\u5b9e\u9645\u5de5\u4f5c\u6761\u4ef6\u4f1a\u5f71\u54cd\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\uff0c\u5e76\u4f1a\u5f71\u54cd\u5b83\u4eec\u5728T<sub>J<\/sub>\u4f30\u7b97\u8fc7\u7a0b\u4e2d\u7684\u6709\u6548\u6027\u3002\u4e0b\u9762\u4e3e\u51e0\u4e2a\u4f8b\u5b50\u6765\u63a2\u8ba8\u5b83\u4eec\u5404\u81ea\u7684\u7279\u6027\u548c\u6709\u6548\u6027\u3002<\/p>\n<div class=\"fBox\">\n<div class=\"fl\">\n<p>\u25cf\u7535\u8def\u677f\u6563\u70ed\u6027\u80fd\u7684\u53d8\u5316<br \/>\n\u53f3\u56fe\u8868\u793a\u7535\u8def\u677f\u8868\u5c42\u94dc\u7b94\u9762\u79ef\u4e0e\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u03b8<sub>JA<\/sub>\u53d7\u94dc\u7b94\u9762\u79ef\uff08\u5373\u6d41\u5165PCB\u7684\u70ed\u91cf\uff09\u7684\u5f71\u54cd\u5f88\u5927\uff0c\u800c\u03a8<sub>JT<\/sub>\u7531\u4e8e\u5668\u4ef6\u7684\u5927\u90e8\u5206\u70ed\u91cf\u90fd\u4f1a\u6d41\u5165PCB\uff0c\u56e0\u6b64T<sub>J<\/sub>-T<sub>T<\/sub>\u95f4\u7684\u6e29\u5dee\u975e\u5e38\u5c0f\uff0c\u6545\u03a8<sub>JT<\/sub>\u7684\u503c\u548c\u53d8\u5316\u4e5f\u90fd\u5f88\u5c0f\u3002\u7531\u4e8e\u03b8<sub>JA<\/sub>\u4f1a\u56e0\u5b9e\u88c5\u7535\u8def\u677f\u7684\u6761\u4ef6\u4e0d\u540c\u800c\u6709\u5f88\u5927\u53d8\u5316\uff0c\u56e0\u6b64\u5f88\u96be\u76f4\u63a5\u7528\u4e8e\u4f30\u7b97T<sub>J<\/sub>\uff0c\u4f46\u03a8<sub>JT<\/sub>\u4e0d\u4f1a\u56e0PCB\u7684\u5dee\u5f02\u800c\u6709\u8f83\u5927\u53d8\u5316\uff0c\u6240\u4ee5\u662f\u53ef\u4ee5\u4f7f\u7528\u7684\u3002<\/p>\n<\/div>\n<div class=\"fr\">\n<p style=\"margin-top: 30px;\"><img decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-10_f1.png\" alt=\"\u57fa\u677f\u8868\u5c64\u9285\u7b94\u9762\u7a4d\u3068\u03b8JA\u3068\u03a8JT\u306e\u95a2\u4fc2\" \/><\/p>\n<\/div>\n<\/div>\n<p>\u25cf\u88ab\u5c4f\u853d\u7f69\u7b49\u8986\u76d6\u7684\u72b6\u6001<br \/>\n\u51fa\u4e8eEMC\u5bf9\u7b56\u7b49\u539f\u56e0\uff0c\u76ee\u6807\u5668\u4ef6\u53ef\u80fd\u4f1a\u6709\u4f7f\u7528\u5c4f\u853d\u7f69\u8986\u76d6\u7684\u60c5\u51b5\u3002\u4e0b\u9762\u662f\u4f7f\u7528\u548c\u4e0d\u4f7f\u7528\u5c4f\u853d\u7f69\u65f6\u5b9e\u6d4b\u7684\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u7ed3\u679c\u6bd4\u8f83\u3002<\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-10_f2.png\" alt=\"\u30b7\u30fc\u30eb\u30c9\u30b1\u30fc\u30b9\u3042\u308a\u30fb\u306a\u3057\u3067\u306e\u5b9f\u6e2c\u306b\u3088\u308b\u03b8JA\u3068\u03a8JT\u306e\u6bd4\u8f03\" \/><\/p>\n<p>\u6709\u5c4f\u853d\u7f69\u65f6\uff0c\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u5747\u4f1a\u4e0a\u5347\uff0c\u4f46\u03b8<sub>JA<\/sub>\u7684\u6ce2\u52a8\u8f83\u5927\uff0c\u65e0\u6cd5\u7528\u4e8e\u4f30\u7b97T<sub>J<\/sub>\u3002\u800c\u03a8<sub>JT<\/sub>\u7684\u4e0a\u5347\u91cf\u5f88\u5c0f\uff0c\u539f\u6765\u7684\u503c\u4e5f\u5f88\u5c0f\uff0c\u6ce2\u52a8\u4e5f\u5f88\u5c0f\uff0c\u5373\u4f7f\u76f4\u63a5\u7528\u4e8eT<sub>J<\/sub>\u8ba1\u7b97\u4e5f\u4e0d\u4f1a\u9020\u6210\u592a\u5927\u7684\u8bef\u5dee\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u65e0\u5c4f\u853d\u7f69\u7684\u03a8<sub>JT<\/sub>\uff1d9.4\u2103\/W\uff0c\u6765\u8ba1\u7b97\u6709\u5c4f\u853d\u7f69\u7684T<sub>J<\/sub>\u7ed3\u679c\u5982\u4e0b\uff0c\u4e0e\u5b9e\u9645\u6e29\u5ea6106.7\u2103\u76f8\u6bd4\uff0c\u8bef\u5dee\u57281%\u4ee5\u5185\u3002<\/p>\n<p style=\"margin-left: 10px;\"><img decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-10_formula01.png\" alt=\"T_J=0.5W\u00d79.4\u2103\/W+101.3\u2103=106.0\u2103\" \/><\/p>\n<p>\u25cf\u88ab\u6811\u8102\u5bc6\u5c01\u5e76\u88ab\u5c4f\u853d\u7f69\u7b49\u8986\u76d6\u7684\u72b6\u6001<br \/>\n\u4e3a\u4e86\u8d77\u5230\u4fdd\u62a4\u4f5c\u7528\uff0c\u6709\u65f6\u4f1a\u5c06\u7535\u8def\u677f\u4e0a\u7684\u5b9e\u88c5\u5143\u5668\u4ef6\u8fdb\u884c\u6811\u8102\u5bc6\u5c01\u3002\u5728\u8fd9\u91cc\uff0c\u5047\u8bbe\u662f\u4e0d\u4ec5\u88ab\u6811\u8102\u5bc6\u5c01\u8fd8\u88ab\u5c4f\u853d\u7f69\u7b49\u8986\u76d6\u7684\u60c5\u51b5\u3002<\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-10_f3.png\" alt=\"\u57fa\u677f\u3092\u5b9f\u88c5\u90e8\u54c1\u3054\u3068\u6a39\u8102\u5c01\u6b62\u3057\u30b7\u30fc\u30eb\u30c9\u30b1\u30fc\u30b9\u3067\u8986\u308f\u308c\u305f\u72b6\u614b\u306e\u03b8JA\u3068\u03a8JT\" \/><\/p>\n<p>\u03b8<sub>JA<\/sub>\u53d7\u5bc6\u5c01\u6811\u8102\u5f71\u54cd\uff0c\u70ed\u963b\u663e\u7740\u964d\u4f4e\uff0c\u5728\u8fd9\u79cd\u6761\u4ef6\u4e0b\uff0c\u03b8<sub>JA<\/sub>\u4e0d\u80fd\u7528\u4e8eT<sub>J<\/sub>\u8ba1\u7b97\u3002\u03a8<sub>JT<\/sub>\u5448\u4e0a\u5347\u8d8b\u52bf\uff0c\u6ce2\u52a8\u8f83\u5927\u3002\u4f7f\u7528\u6ca1\u6709\u6811\u8102\u5bc6\u5c01\u548c\u5c4f\u853d\u7f69\u65f6\u7684\u03a8<sub>JT<\/sub>=9.4\u2103\/W\uff0c\u8ba1\u7b97\u6709\u6811\u8102\u5bc6\u5c01\u548c\u5c4f\u853d\u7f69\u65f6\u7684T<sub>J<\/sub>\uff0c\u7ed3\u679c\u5982\u4e0b\u3002<\/p>\n<p style=\"margin-left: 10px;\"><img decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-10_formula02.png\" alt=\"T_J=0.5W\u00d79.4\u2103\/W+44.5\u2103=49.2\u2103\" \/><\/p>\n<p>\u4e0e\u5b9e\u9645\u6e29\u5ea653.3\u2103\u76f8\u6bd4\uff0c\u8bef\u5dee\u7ea6\u4e3a8%\u3002\u8fd9\u5c31\u9700\u8981\u63a2\u8ba8\u662f\u5426\u5141\u8bb8\u8fd9\u4e2a\u7a0b\u5ea6\u7684\u8bef\u5dee\uff0c\u6216\u8005\u7ea0\u6b63\u8bef\u5dee\u540e\u7528\u4e8eT<sub>J<\/sub>\u7684\u8ba1\u7b97\u3002<\/p>\n<p>\u25cf\u6210\u4e3a\u70ed\u6e90\u7684\u5143\u5668\u4ef6\u5f7c\u6b64\u76f8\u90bb\u7684\u72b6\u6001<br \/>\n\u867d\u7136\u5e94\u8be5\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u4f46\u5728\u5143\u5668\u4ef6\u5b9e\u9645\u5b89\u88c5\u8fc7\u7a0b\u4e2d\u4ea7\u751f\u70ed\u91cf\u7684\u5143\u5668\u4ef6\u8fd8\u662f\u53ef\u80fd\u4f1a\u5f7c\u6b64\u76f8\u90bb\u3002\u4e0b\u9762\u662f\u4e24\u8005\u5177\u6709\u9002\u5f53\u7684\u8ddd\u79bb\uff08\u4e2d\u95f4\u56fe\uff09\u65f6\u548c\u5b83\u4eec\u5f7c\u6b64\u76f8\u90bb\uff08\u53f3\u56fe\uff09\u65f6\u7684\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u7ed3\u679c\u6bd4\u8f83\u3002<\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-10_f4.png\" alt=\"2\u500b\u304c\u9069\u5ea6\u306a\u8ddd\u96e2\u3092\u6301\u3063\u3066\u3044\u308b\u5834\u5408\u3068\u96a3\u63a5\u3057\u3066\u3044\u308b\u5834\u5408\u306e\u03b8JA\u3068\u03a8JT\" \/><\/p>\n<p>\u4ece\u6570\u636e\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u5143\u5668\u4ef6\u8ddd\u79bb\u5f88\u8fd1\u65f6\uff0c\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u5747\u4e0a\u5347\uff0c\u4f46\u03b8<sub>JA<\/sub>\u7684\u6ce2\u52a8\u8f83\u5927\uff0c\u4e0d\u80fd\u7528\u4e8eT<sub>J<\/sub>\u7684\u4f30\u7b97\u3002\u5f53\u7136\uff0c\u03a8<sub>JT<\/sub>\u4e5f\u6709\u6ce2\u52a8\uff0c\u4f46\u7531\u4e8e\u5176\u503c\u539f\u672c\u5c31\u5c0f\uff0c\u6ce2\u52a8\u4e5f\u5f88\u5c0f\uff0c\u56e0\u6b64\u5373\u4f7f\u7528\u4e8eT<sub>J<\/sub>\u7684\u4f30\u7b97\u4e5f\u4e0d\u4f1a\u9020\u6210\u592a\u5927\u7684\u8bef\u5dee\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e00\u4e2a\u5143\u5668\u4ef6\u65f6\u7684\u03a8<sub>JT<\/sub>=9.4\u2103\/W\uff0c\u8ba1\u7b97\u4e24\u4e2a\u76f8\u90bb\u72b6\u6001\u4e0b\u7684T<sub>J<\/sub>\u65f6\uff0c\u7ed3\u679c\u5982\u4e0b\uff0c\u4e0e\u5b9e\u9645\u6e29\u5ea6101.5\u2103\u76f8\u6bd4\uff0c\u8bef\u5dee\u57281%\u4ee5\u5185\u3002<\/p>\n<p style=\"margin-left: 10px;\"><img decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-10_formula03.png\" alt=\"T_J=0.5W\u00d79.4\u2103\/W+96.3\u2103=101.0\u2103\" \/><\/p>\n<p>\u25cf\u7535\u8def\u677f\u5c42\u6570\u53d8\u5316\u65f6<br \/>\n\u4e0b\u56fe\u663e\u793a\u4e86\u5f53\u7535\u8def\u677f\u7684\u5c42\u6570\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u7684\u53d8\u5316\u60c5\u51b5\u3002<\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-10_f5.png\" alt=\"\u57fa\u677f\u306e\u5c64\u6570\u304c\u5909\u308f\u3063\u305f\u5834\u5408\u306e\u03b8JA\u3068\u03a8JT\" \/><\/p>\n<p>\u968f\u7740\u7535\u8def\u677f\u5c42\u6570\u7684\u589e\u52a0\uff0c\u03b8<sub>JA<\/sub>\u663e\u7740\u4e0b\u964d\uff0c\u4f46\u5373\u4f7f\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u03b8<sub>JA<\/sub>\u4e5f\u4e0d\u80fd\u7528\u4e8eT<sub>J<\/sub>\u7684\u8ba1\u7b97\u3002\u03a8<sub>JT<\/sub>\u7684\u6ce2\u52a8\u4e5f\u5f88\u5927\uff0c\u4f5c\u4e3a\u793a\u4f8b\uff0c\u4f7f\u75281s\uff081\u5c42\u7535\u8def\u677f\uff09\u65f6\u7684\u03a8<sub>JT<\/sub>=9.4\u2103\/W\uff0c\u8ba1\u7b972s2p\uff084\u5c42\u7535\u8def\u677f\uff09\u65f6\u7684T<sub>J<\/sub>\uff0c\u7ed3\u679c\u5982\u4e0b\u3002<\/p>\n<p style=\"margin-left: 10px;\"><img decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-10_formula04.png\" alt=\"T_J=0.5W\u00d79.4\u2103\/W+33.7\u2103=38.4\u2103\" 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rel=\"noopener\">\u4e0a\u4e00\u7bc7<\/a>\u4e2d\u7684\u8ba8\u8bba\u4e00\u6837\uff0c\u53d7\u94dc\u7b94\u548c\u7535\u8def\u677f\u7b49\u6563\u70ed\u6761\u4ef6\u7684\u5f71\u54cd\uff0c\u4ee5\u53ca\u76f8\u90bb\u5143\u5668\u4ef6\u7684\u70ed\u5e72\u6270\u5f71\u54cd\uff0c\u5728\u5e94\u7528\u4ea7\u54c1\u4e2d\u5f88\u96be\u5c06\u03b8<sub>JA<\/sub>\u7528\u4e8eT<sub>J<\/sub>\u7684\u4f30\u7b97\u3002<\/p>\n<p>\u800c\u03a8<sub>JT<\/sub>\u867d\u7136\u4f1a\u56e0\u5b89\u88c5\u6761\u4ef6\u800c\u53d8\u5316\uff0c\u4f46\u7531\u4e8e\u5176\u503c\u539f\u672c\u5c31\u5f88\u5c0f\uff0c\u800c\u4e14\u5728\u67d0\u4e9b\u6761\u4ef6\u4e0b\u7684\u6ce2\u52a8\u4e5f\u5f88\u5c0f\uff0c\u56e0\u6b64\u901a\u8fc7\u638c\u63e1\u6240\u4f7f\u7528\u7684\u7535\u8def\u677f\u548c\u5e94\u7528\u4ea7\u54c1\u7684\u72b6\u6001\uff0c\u5e76\u9ad8\u7cbe\u5ea6\u5730\u6d4b\u91cfT<sub>T<\/sub>\uff0c\u53ef\u4ee5\u5c06\u63d0\u4f9b\u7684\u03a8<sub>JT<\/sub>\u503c\u7528\u4e8e\u5b9e\u9645\u4f7f\u7528\u65f6\u7684T<sub>J<\/sub>\u4f30\u7b97\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u672c\u6587\u7684\u5173\u952e\u8981\u70b9 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