{"id":17500,"date":"2022-01-13T13:45:02","date_gmt":"2022-01-13T05:45:02","guid":{"rendered":"https:\/\/techclass.wfjydl.com\/?p=17500"},"modified":"2025-07-11T14:38:52","modified_gmt":"2025-07-11T06:38:52","slug":"17500","status":"publish","type":"post","link":"https:\/\/techclass.wfjydl.com\/knowledge\/thermal-design\/s-thermal-design\/01-s-thermal-design\/10039","title":{"rendered":"\u70ed\u963b\u6570\u636e\uff1a \u4f30\u7b97TJ\u65f6\u6d89\u53ca\u5230\u7684\u03b8JA\u548c\u03a8JT \uff0d\u51761\uff0d"},"content":{"rendered":"<div id=\"keypoint-thermal-design\" class=\"keypoint indent\" style=\"margin-bottom: 20px;\">\n<h4>\u672c\u6587\u7684\u5173\u952e\u8981\u70b9<\/h4>\n<p>\u30fb\u9274\u4e8e\u8fd1\u5e74\u6765\u7535\u5b50\u8bbe\u5907\u4e2d\u534a\u5bfc\u4f53\u5143\u5668\u4ef6\u7684\u5b9e\u9645\u5b89\u88c5\u6761\u4ef6\uff0c\u4e00\u822c\u8ba4\u4e3a\u901a\u8fc7\u03b8JA\u8fdb\u884c\u70ed\u8bbe\u8ba1\u662f\u6bd4\u8f83\u96be\u7684\u3002<\/p>\n<p>\u30fb\u8fd1\u5e74\u6765\u96be\u4ee5\u7edf\u4e00T<sub>A<\/sub>\u7684\u5b9a\u4e49\uff0c\u9700\u8981\u5355\u72ec\u5b9a\u4e49\u3002<\/p>\n<p>\u30fb\u5728\u534a\u5bfc\u4f53\u5668\u4ef6\u5b89\u88c5\u5bc6\u5ea6\u5f88\u9ad8\u7684\u8bbe\u5907\u4e2d\u5f88\u96be\u5b9e\u6d4bT<sub>A<\/sub>\u3002<\/p>\n<p>\u30fb\u8fd1\u5e74\u6765\uff0c\u6839\u636e\u6bd4\u8f83\u5bb9\u6613\u5b9e\u6d4b\u7684T<sub>T<\/sub>\u548c\u03a8<sub>JT<\/sub>\u6765\u4f30\u7b97T<sub>J<\/sub>\u5df2\u6210\u4e3a\u4e3b\u6d41\u65b9\u6cd5\u3002\n<\/div>\n<p><a href=\"https:\/\/techclass.wfjydl.com\/knowledge\/thermal-design\/s-thermal-design\/01-s-thermal-design\/9678\" target=\"_blank\" rel=\"noopener\">\u4e0a\u4e00\u7bc7\u6587\u7ae0<\/a>\u4e2d\u4ecb\u7ecd\u4e86\u70ed\u963b\u6570\u636e\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u7684\u5b9a\u4e49\u3002\u63a5\u4e0b\u6765\u5c06\u5206\u4e24\u6b21\u6765\u63a2\u8ba8\u5728\u8fdb\u884cT<sub>J<\/sub>\u4f30\u7b97\u65f6\u5982\u4f55\u4f7f\u7528\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u3002\u53e6\u5916\uff0c\u8fd8\u5c06\u5355\u72ec\u4ecb\u7ecd\u4f7f\u7528\u4e86\u70ed\u963b\u6570\u636e\u7684T<sub>J<\/sub>\u4f30\u7b97\u793a\u4f8b\u3002<\/p>\n<h2>\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub><\/h2>\n<p>\u4e0b\u8868\u662f\u4e0a\u4e00\u7bc7\u4e2d\u63d0\u5230\u7684\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u76f8\u5173\u7684\u91cd\u70b9\u5185\u5bb9\u3002\u03b8<sub>JA<\/sub>\u662f\u4ece\u7ed3\u70b9\u5230\u5468\u56f4\u73af\u5883\u4e4b\u95f4\u7684\u70ed\u963b\uff0c\u5b58\u5728\u591a\u6761\u6563\u70ed\u8def\u5f84\u3002\u03a8<sub>JT<\/sub>\u662f\u4ece\u7ed3\u70b9\u5230\u5c01\u88c5\u4e0a\u8868\u9762\u4e2d\u5fc3\u7684\u70ed\u7279\u6027\u53c2\u6570\u3002\u03a8<sub>JT<\/sub>\u7684\u8ba1\u7b97\u516c\u5f0f\u4e2d\u5305\u542b\u7684T<sub>T<\/sub>\u662f\u5c01\u88c5\u9876\u9762\u4e2d\u5fc3\u7684\u6e29\u5ea6\u3002<\/p>\n<table class=\"tbl_nml\">\n<tbody>\n<tr>\n<th style=\"width: 44px;\" scope=\"col\">\u7b26\u53f7<\/th>\n<th style=\"width: 300px;\" scope=\"col\">\u5b9a\u4e49<\/th>\n<th style=\"width: 300px;\" scope=\"col\">\u7528\u9014<\/th>\n<th style=\"width: 146px;\" scope=\"col\">\u8ba1\u7b97\u516c\u5f0f<\/th>\n<\/tr>\n<tr>\n<td class=\"tbl_ctr\">\u03b8<sub>JA<\/sub><\/td>\n<td>\u7ed3\u70b9\u4e0e\u5468\u56f4\u73af\u5883\u95f4\u7684\u70ed\u963b\u3002<\/td>\n<td>\u5f62\u72b6\u4e0d\u540c\u7684\u5c01\u88c5\u4e4b\u95f4\u7684\u6563\u70ed\u6027\u80fd\u6bd4\u8f83\u3002<\/td>\n<td class=\"tbl_ctr\">\u03b8<sub>JA<\/sub>\uff1d(T<sub>J<\/sub>\uff0dT<sub>A<\/sub>) \/ P<\/td>\n<\/tr>\n<tr>\n<td class=\"tbl_ctr\">\u03a8<sub>JT<\/sub><\/td>\n<td>\u8868\u793a\u76f8\u5bf9\u4e8e\u5668\u4ef6\u6574\u4f53\u7684\u529f\u8017P\u7684\u3001\u7ed3\u70b9\u4e0e\u5c01\u88c5\u4e0a\u8868\u9762\u4e2d\u5fc3\u4e4b\u95f4\u7684\u6e29\u5ea6\u5dee\u7684\u70ed\u7279\u6027\u53c2\u6570\u3002<\/td>\n<td>\u4f30\u7b97\u5728\u5b9e\u9645\u5e94\u7528\u4ea7\u54c1\uff08\u5b9e\u9645\u6563\u70ed\u73af\u5883\uff09\u4e2d\u7684\u7ed3\u6e29\u3002<\/td>\n<td class=\"tbl_ctr\">\u03a8<sub>JT<\/sub>\uff1d(T<sub>J<\/sub>\u30fcT<sub>T<\/sub>) \/ P<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8868\u683c\u4e2d\u5efa\u8bae\u7684\u7528\u9014\u662f\u03b8<sub>JA<\/sub>\uff1a\u201c\u5f62\u72b6\u4e0d\u540c\u7684\u5c01\u88c5\u4e4b\u95f4\u7684\u6563\u70ed\u6027\u80fd\u6bd4\u8f83\u201d\uff0c\u03a8<sub>JT<\/sub>\uff1a\u201c\u4f30\u7b97\u5728\u5b9e\u9645\u5e94\u7528\u4ea7\u54c1\u4e2d\u7684\u7ed3\u6e29\u201d\uff0c\u4e0b\u9762\u6765\u601d\u8003\u4e00\u4e0b\u8fd9\u6837\u5efa\u8bae\u7684\u539f\u56e0\u3002<\/p>\n<h3>\u5173\u4e8e\u03b8<sub>JA<\/sub><\/h3>\n<p>\u5728\u70ed\u8bbe\u8ba1\u4e2d\uff0c\u6709\u4e00\u4e2a\u8ba8\u8bba\uff1a\u201c\u03b8<sub>JA<\/sub>\u53ef\u4ee5\u5e94\u7528\u4e8e\u70ed\u8bbe\u8ba1\u5417\uff1f\u201d\u4ece\u7ed3\u8bba\u6765\u770b\uff0c\u53ef\u4ee5\u8ba4\u4e3a\u4f7f\u7528\u03b8<sub>JA<\/sub>\u6765\u8fdb\u884c\u70ed\u8bbe\u8ba1\u662f\u5b58\u5728\u56f0\u96be\u7684\u3002\u5176\u4e3b\u8981\u539f\u56e0\u5982\u4e0b\uff1a<\/p>\n<p>\u25cfT<sub>A<\/sub>\u7684\u6e29\u5ea6\u662f\u54ea\u91cc\u7684\u6e29\u5ea6\uff1f<br \/>\n\u6700\u7ec8\u8fd8\u662f\u9700\u8981\u901a\u8fc7\u4f30\u7b97T<sub>J<\/sub>\u7684\u6e29\u5ea6\u6765\u8fdb\u884c\u5224\u65ad\u3002\u4f7f\u7528\u03b8<sub>JA<\/sub>\u8ba1\u7b97T<sub>J<\/sub>\u65f6\uff0c\u9700\u8981\u73af\u5883\u6e29\u5ea6T<sub>A<\/sub>\u3002<\/p>\n<p>T<sub>A<\/sub>\u7684\u6e29\u5ea6\u662f\u7531JEDEC Standard\u5b9a\u4e49\u7684\u3002\u4ee5\u4e0b\u662f\u7528\u6765\u53c2\u8003\u7684JEDEC Standard\uff1a<\/p>\n<p style=\"margin-left: 10px; text-indent: -1em;\">\u25b8JESD51-2A Integrated Circuits Thermal Test Method Environmental Conditions \u2013 Natural Convection (Still Air)<\/p>\n<p>T<sub>A<\/sub>\u57fa\u672c\u4e0a\u662f\u5728JEDEC\u6307\u5b9a\u7684\u4f4d\u7f6e\u6d4b\u91cf\u7684\uff0c\u4f46\u6709\u4e9b\u5236\u9020\u5546\u53ef\u80fd\u4f1a\u5355\u72ec\u63d0\u51faT<sub>A<\/sub>\u6d4b\u91cf\u6761\u4ef6\u3002<\/p>\n<p>\u53e6\u5916\uff0cJEDEC Standard\u662f\u5728\u4e0d\u53d7\u53d1\u70ed\u5f71\u54cd\u7684\u7a7a\u95f4\u524d\u63d0\u4e0b\u6765\u5b9a\u4e49T<sub>A<\/sub>\u7684\uff0c\u4f46\u8fd1\u5e74\u6765\u8bbe\u5907\u7684\u5b89\u88c5\u60c5\u51b5\u8d8a\u6765\u8d8a\u590d\u6742\uff0c\u51fa\u73b0\u4e86\u662f\u5426\u771f\u7684\u5b58\u5728\u4e0d\u53d7\u53d1\u70ed\u5f71\u54cd\u7684\u7a7a\u95f4\u7684\u8ba8\u8bba\u3002<\/p>\n<div class=\"fBox\">\n<div class=\"fl\">\n<p>\u25cf\u9ad8\u5bc6\u5ea6\u5b89\u88c5\u8d8b\u52bf<br \/>\n\u5982\u4e0a\u4e00\u9879\u6240\u63d0\u5230\u7684\uff0c\u7531\u4e8e\u5b89\u88c5\u5bc6\u5ea6\u8d8a\u6765\u8d8a\u9ad8\uff0cIC\u548c\u5176\u4ed6\u53d1\u70ed\u5668\u4ef6\u62e5\u6324\u5728\u7535\u8def\u677f\u4e0a\u3002\u5f88\u5bb9\u6613\u60f3\u8c61\uff0c\u73b0\u5b9e\u4e2d\u7531\u4e8e\u4e0e\u76ee\u6807\u76f8\u90bb\u7684IC\u7b49\u5668\u4ef6\u7684\u70ed\u5e72\u6270\u5bfc\u81f4\u6e29\u5ea6\u5347\u9ad8\uff0c\u56e0\u6b64\u5f88\u96be\u5224\u65ad\u8ba4\u4e3a\u662fT<sub>A<\/sub>\u7684\u4f4d\u7f6e\u7684\u6e29\u5ea6\u662f\u5426\u771f\u7684\u662fT<sub>A<\/sub>\u7684\u6e29\u5ea6\u3002<\/p>\n<\/div>\n<div class=\"fr\"><img loading=\"lazy\" decoding=\"async\" width=\"147\" height=\"154\" class=\"alignnone size-full wp-image-17501\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-9_f1.png\" alt=\"\" \/><\/div>\n<\/div>\n<div class=\"fBox\">\n<div class=\"fl\">\n<p>\u25cf\u03b8<sub>JA<\/sub>\u968f\u6709\u6548\u6563\u70ed\u8303\u56f4\u7684\u53d8\u5316\u800c\u53d8\u5316<br \/>\n\u8868\u9762\u8d34\u88c5\u578b\u5c01\u88c5\u7684IC\uff0c\u5176\u6280\u672f\u89c4\u683c\u4e66\u4e2d\u7684\u03b8<sub>JA<\/sub>\u4f1a\u63d0\u4f9b\u6563\u70ed\u7528\u7684\u94dc\u7b94\u9762\u79ef\u3001\u7535\u8def\u677f\u7684\u6750\u8d28\u548c\u539a\u5ea6\u7b49\u6761\u4ef6\u3002\u56e0\u6b64\u53cd\u8fc7\u6765\u4e5f\u53ef\u4ee5\u8bf4\u201c\u03b8<sub>JA<\/sub>\u6839\u636e\u5b9e\u88c5\u6761\u4ef6\u800c\u53d8\u5316\u201d\u3002\u53f3\u56fe\u662f\u8868\u793a\u03b8<sub>JA<\/sub>\u548cIC\u8d34\u88c5\u90e8\u7684\u8868\u9762\u94dc\u7b94\u9762\u79ef\u4e4b\u95f4\u7684\u5173\u7cfb\u7684\u6570\u636e\u793a\u4f8b\u3002\u4ece\u56fe\u4e2d\u53ef\u4ee5\u660e\u663e\u770b\u51fa\uff0c\u968f\u7740\u94dc\u7b94\u9762\u79ef\u7684\u589e\u52a0\uff0c\u03b8<sub>JA<\/sub>\u53d8\u5c0f\u4e86\uff0c\u4f46\u662f\u03b8<sub>JA<\/sub>\u7684\u53d8\u5316\u5e76\u4e0d\u662f\u7ebf\u6027\u7684\uff0c\u800c\u4e14\u5982\u679c\u6ca1\u6709\u63d0\u4f9b\u8fd9\u6837\u7684\u56fe\uff0c\u6839\u636e\u5b9e\u9645\u7535\u8def\u677f\u7684\u76f8\u5e94\u9762\u79ef\u4f30\u7b97\u03b8<sub>JA<\/sub>\u662f\u76f8\u5f53\u56f0\u96be\u7684\u3002\u5f88\u9057\u61be\u7684\u662f\uff0c\u5e76\u4e0d\u662f\u6bcf\u4e2a\u5236\u9020\u5546\u90fd\u4f1a\u63d0\u4f9b\u8fd9\u6837\u7684\u56fe\u8868\u3002<\/p>\n<\/div>\n<div class=\"fr\"><img loading=\"lazy\" decoding=\"async\" width=\"319\" height=\"211\" class=\"alignnone size-full wp-image-17502\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-9_f2.png\" alt=\"\" \/><\/div>\n<\/div>\n<p>\u57fa\u4e8e\u8fd9\u4e9b\u60c5\u51b5\uff0c\u5c24\u5176\u662f\u5728\u8fd1\u5e74\u6765\u7684\u5b9e\u9645\u60c5\u51b5\u4e0b\uff0c\u901a\u5e38\u8ba4\u4e3a\u4f7f\u7528\u03b8<sub>JA<\/sub>\u8fdb\u884c\u70ed\u8bbe\u8ba1\u662f\u5f88\u96be\u7684\u3002\u8fd1\u5e74\u6765\uff0c\u9010\u6e10\u6210\u4e3a\u4e3b\u6d41\u7684T<sub>J<\/sub>\u4f30\u7b97\u65b9\u6cd5\u662f\u5b9e\u9645\u6d4b\u91cf\u76ee\u6807\u4ea7\u54c1\u5c01\u88c5\u9876\u9762\u4e2d\u5fc3\u7684\u6e29\u5ea6T<sub>T<\/sub>\uff0c\u5e76\u6839\u636e\u03a8<sub>JT<\/sub>\u8ba1\u7b97T<sub>J<\/sub>\u3002<\/p>\n<h3>\u5173\u4e8e\u03a8<sub>JT<\/sub><\/h3>\n<p>\u03a8<sub>JT<\/sub>\u8868\u793a\u76f8\u5bf9\u4e8e\u5668\u4ef6\u6574\u4f53\u7684\u529f\u8017P\u7684\u3001\u7ed3\u70b9\u4e0e\u5c01\u88c5\u9876\u9762\u4e2d\u5fc3\u4e4b\u95f4\u7684\u6e29\u5ea6\u5dee\u7684\u70ed\u7279\u6027\u53c2\u6570\u3002\u4e0b\u56fe\u662f\u8868\u793aT<sub>J<\/sub>\u548cT<sub>T<\/sub>\u7684\u793a\u610f\u56fe\u3002\u7531\u4e8eT<sub>T<\/sub>\u662f\u5c01\u88c5\u9876\u9762\u4e2d\u5fc3\u5904\u7684\u6e29\u5ea6\uff0c\u56e0\u6b64\u53ef\u4ee5\u5728\u5b9e\u88c5\u8bbe\u5907\u7684\u5b9e\u9645\u5de5\u4f5c\u72b6\u6001\u4e0b\u4f7f\u7528\u70ed\u7535\u5076\u7b49\u8fdb\u884c\u6d4b\u91cf\u3002<\/p>\n<p style=\"text-align: center;\">\n<img loading=\"lazy\" decoding=\"async\" width=\"534\" height=\"205\" class=\"alignnone size-full wp-image-17503\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2022\/01\/TD1-9_f3.png\" alt=\"\" \/><\/p>\n<p>\u53ea\u8981\u80fd\u591f\u83b7\u5f97T<sub>T<\/sub>\u7684\u6570\u636e\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7\u53d8\u6362\u524d\u9762\u7ed9\u51fa\u7684\u03a8<sub>JT<\/sub>\u7684\u516c\u5f0f\u6765\u6c42\u5f97T<sub>J<\/sub>\u3002<\/p>\n<p>\u03a8<sub>JT<\/sub>\uff1d(T<sub>J<\/sub>\u30fcT<sub>T<\/sub>) \/ P\u3000\u3000\u21d2\u3000\u3000T<sub>J<\/sub>\uff1dT<sub>T<\/sub>\uff0b\u03a8<sub>JT<\/sub>\u00d7P<\/p>\n<p>\u201c\u03a8<sub>JT<\/sub>\u00d7P\u201d\u662fT<sub>J<\/sub>\u548cT<sub>T<\/sub>\u4e4b\u95f4\u7684\u6e29\u5dee\uff0c\u56e0\u6b64\u5c06\u5176\u4e0eT<sub>T<\/sub>\u76f8\u52a0\u5f97\u5230T<sub>J<\/sub>\u3002<\/p>\n<p>\u4e0b\u4e00\u7bc7\u5c06\u4ecb\u7ecd\u534a\u5bfc\u4f53\u5668\u4ef6\u5b9e\u88c5\u8bbe\u5907\u4e2d\u7684\u5404\u79cd\u6761\u4ef6\u4e0e\u03b8<sub>JA<\/sub>\u548c\u03a8<sub>JT<\/sub>\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u4ee5\u53caT<sub>J<\/sub>\u5728\u03a8<sub>JT<\/sub>\u4f30\u7b97\u4e2d\u7684\u6709\u6548\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u672c\u6587\u7684\u5173\u952e\u8981\u70b9 \u30fb\u9274\u4e8e\u8fd1\u5e74\u6765\u7535\u5b50\u8bbe\u5907\u4e2d\u534a\u5bfc\u4f53\u5143\u5668\u4ef6\u7684\u5b9e\u9645\u5b89\u88c5\u6761\u4ef6\uff0c\u4e00\u822c\u8ba4\u4e3a\u901a\u8fc7\u03b8JA\u8fdb\u884c\u70ed\u8bbe\u8ba1\u662f\u6bd4\u8f83\u96be\u7684\u3002 \u30fb\u8fd1\u5e74\u6765\u96be\u4ee5\u7edf\u4e00TA\u7684\u5b9a\u4e49\uff0c\u9700\u8981\u5355\u72ec\u5b9a\u4e49\u3002 \u30fb\u5728\u534a\u5bfc\u4f53\u5668\u4ef6\u5b89\u88c5\u5bc6\u5ea6\u5f88\u9ad8\u7684\u8bbe\u5907\u4e2d\u5f88\u96be\u5b9e\u6d4bTA\u3002 \u30fb\u8fd1\u5e74\u6765\uff0c\u6839\u636e\u6bd4\u8f83 [&hellip;]","protected":false},"author":4,"featured_media":17537,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1194],"tags":[1244,2627,1737,1736,1557,1556,1555,1554,1535,1533,1530,1272,339,1243,1209,1208,1207,1205,1082,715,709,533,341],"class_list":["post-17500","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-01-s-thermal-design","tag-1244","tag-dc-dc","tag-1737","tag-tt","tag-1557","tag-jt","tag-jc-top","tag-jc-bot","tag-1535","tag-jedec","tag-jedec-jesd51","tag-1272","tag-tjmax","tag-1243","tag-1209","tag-1208","tag-1207","tag-1205","tag-1082","tag-715","tag-ja","tag-533","tag-341"],"acf":[],"wps_subtitle":"","_links":{"self":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/17500","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=17500"}],"version-history":[{"count":4,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/17500\/revisions"}],"predecessor-version":[{"id":17608,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/17500\/revisions\/17608"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/media\/17537"}],"wp:attachment":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/media?parent=17500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/categories?post=17500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/tags?post=17500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}