{"id":27895,"date":"2025-07-10T09:02:33","date_gmt":"2025-07-10T01:02:33","guid":{"rendered":"https:\/\/techclass.wfjydl.com\/?p=27895"},"modified":"2025-11-13T17:08:55","modified_gmt":"2025-11-13T09:08:55","slug":"%e7%ba%bf%e6%80%a7%e7%a8%b3%e5%8e%8b%e5%99%a8%e7%9a%84%e5%90%af%e5%8a%a8%e7%89%b9%e6%80%a7","status":"publish","type":"post","link":"https:\/\/techclass.wfjydl.com\/knowledge\/dcdc\/dcdc-ldo\/dcdc-ldo05\/17967","title":{"rendered":"\u7ebf\u6027\u7a33\u538b\u5668\u7684\u542f\u52a8\u7279\u6027"},"content":{"rendered":"\\(\\)\n<p>\u4ee5\u4e0b\u5c06\u4ecb\u7ecd\u7ebf\u6027\u7a33\u538b\u5668\u7535\u6e90\uff08\\(V_{IN}\\)\uff09\u5f00\u542f\u65f6\u7684\u542f\u52a8\u7279\u6027\u53ca\u5173\u95ed\u65f6\u7684\u7279\u6027\u3002\u5f53\u7ebf\u6027\u7a33\u538b\u5668\u7684\u7535\u6e90\u5728\u5f00\u542f\u4e0e\u5173\u95ed\u65f6\uff0c\u5176\u5de5\u4f5c\u7279\u6027\u4f1a\u53d7\\(V_{IN}\\)\u7684\u77ac\u6001\u53d8\u5316\u53ca\u8f93\u51fa\u7535\u5bb9\u7684\u9759\u7535\u5bb9\u91cf\u7b49\u56e0\u7d20\u5f71\u54cd\u800c\u53d8\u5316\u3002\u7531\u4e8e\u8fd9\u4e9b\u7279\u6027\u5f80\u5f80\u4f1a\u5bf9\u8d1f\u8f7d\u8bbe\u5907\u4ea7\u751f\u5f71\u54cd\uff0c\u56e0\u6b64\u5728\u5de5\u4f5c\u6027\u80fd\u8bc4\u4f30\u4e2d\uff0c\u5b83\u4eec\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u68c0\u67e5\u9879\u76ee\u3002<\/p>\n<h2>\u7ebf\u6027\u7a33\u538b\u5668\u7684\u542f\u52a8\u7279\u6027<\/h2>\n<p>\u4e0b\u56fe\u4e3aVIN\u9636\u8dc3\u5bfc\u901a\u65f6\u7684\u542f\u52a8\u6ce2\u5f62\u793a\u610f\u56fe\u3002\u5f53\\(V_{IN}\\)\u4e0a\u5347\u65f6\uff0c\u7ebf\u6027\u7a33\u538b\u5668\u7684\u7535\u8def\u968f\u5373\u542f\u52a8\u3002\u5f53\u8f93\u51fa\u7535\u5bb9\u7684\u9759\u7535\u5bb9\u91cf\u8f83\u5c0f\uff08\u5927\u81f4\u4e3a\u6570\u5341\u03bcF\u4ee5\u4e0b\uff09\u65f6\uff0c\u542f\u52a8\u65f6\u7684\u6d6a\u6d8c\u7535\u6d41\u901a\u5e38\u4e0d\u4f1a\u8fbe\u5230\u89e6\u53d1\u8f93\u51fa\u8fc7\u6d41\u4fdd\u62a4\u7535\u8def\u7684\u9608\u503c\uff0c\u56e0\u6b64\u8fc7\u6d41\u4fdd\u62a4\u529f\u80fd\u4e0d\u4f1a\u542f\u52a8\uff0c\u4e5f\u4e0d\u4f1a\u53d7\u5230\u7535\u6d41\u9650\u5236\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8f93\u51fa\u7535\u538b\u4e0d\u53d7\u8f93\u51fa\u7535\u5bb9\u9759\u7535\u5bb9\u91cf\u7684\u5f71\u54cd\uff0c\u800c\u662f\u7531IC\u5185\u90e8\u57fa\u51c6\u7535\u538b\u7684\u4e0a\u5347\u65f6\u95f4\u51b3\u5b9a\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-27896 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/07\/009-1.png\" alt=\"\" width=\"241\" height=\"243\" 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href=\"https:\/\/www.wfjydl.com\/products\/power-management\/linear-regulators\/standard-voltage-regulators\/ba1117fp-product\">BA1117\u7cfb\u5217<\/a>\u7684\u4e00\u4e2a\u793a\u4f8b\uff0c\u5b9e\u9645\u7279\u6027\u4f1a\u56e0\u7ebf\u6027\u7a33\u538b\u5668\u7684\u7c7b\u578b\u53ca\u7535\u8def\u6761\u4ef6\u800c\u6709\u6240\u4e0d\u540c\u3002\u6838\u5fc3\u8981\u70b9\u662f\u8f93\u51fa\u7535\u5bb9\u9759\u7535\u5bb9\u91cf\u8d8a\u5927\uff0c\u542f\u52a8\u65f6\u95f4\u8d8a\u957f\uff1b\u8f93\u51fa\u8bbe\u5b9a\u7535\u538b\u8d8a\u9ad8\uff0c\u542f\u52a8\u8017\u65f6\u4e5f\u8d8a\u957f\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-27897 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/07\/010-1.png\" alt=\"\" width=\"592\" height=\"236\" \/><\/p>\n<p>\u6700\u540e\u662f\u5f53\\(V_{IN}\\)\u7f13\u6162\u5bfc\u901a\u4e14\u8f93\u51fa\u7535\u5bb9\u9759\u7535\u5bb9\u91cf\u8f83\u5c0f\u65f6\u7684\u542f\u52a8\u6ce2\u5f62\u793a\u4f8b\u3002\u5728BA1117\u7cfb\u5217\u4e2d\uff0c\u5f53\\(V_{IN}\\)\u8d85\u8fc7\u7ea61V\u65f6\uff0c\u7535\u8def\u5f00\u59cb\u5de5\u4f5c\uff0c\u8f93\u51fa\u7535\u538b\u968f\u4e4b\u5f00\u59cb\u4e0a\u5347\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5373\u4f7f\u8f93\u51fa\u7535\u5bb9\u8f83\u5927\u65f6\uff0c\u7535\u8def\u542f\u52a8\u7684V<sub>IN<\/sub>\u7535\u538b\u4ecd\u4fdd\u6301\u4e0d\u53d8\uff0c\u6b64\u65f6\u8f93\u51fa\u7535\u538b\u7684\u4e0a\u5347\u6ce2\u5f62\u4e0e\u524d\u6587\u6240\u8ff0\u201c\\(V_{IN}\\)\u9636\u8dc3\u5bfc\u901a\u4e14\u8f93\u51fa\u7535\u5bb9\u503c\u8f83\u5927\u65f6\u201d\u7684\u60c5\u51b5\u7c7b\u4f3c\u3002\u5f53\\(V_{IN}\\)\u7f13\u6162\u4e0a\u5347\u65f6\uff0c\u80fd\u591f\u6e05\u6670\u89c2\u6d4b\u5230\\(V_{IN}\\)\u8fbe\u5230\u542f\u52a8\u8d77\u59cb\u7535\u538b\u7684\u5b8c\u6574\u65f6\u95f4\u8fc7\u7a0b\uff1b\u800c\u5f53V<sub>IN<\/sub>\u9636\u8dc3\u5bfc\u901a\u65f6\uff0c\u7531\u4e8e\u7535\u538b\u4f1a\u77ac\u95f4\u8d85\u8fc7\u8be5\u9608\u503c\uff0c\u7535\u8def\u770b\u4f3c\u5448\u73b0\u65e0\u5ef6\u8fdf\u7684\u7acb\u5373\u542f\u52a8\u72b6\u6001\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-27898 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/07\/011-1.png\" alt=\"\" width=\"253\" height=\"248\" \/><\/p>\n<p>&nbsp;<\/p>\n<h2>\u7ebf\u6027\u7a33\u538b\u5668\u7684\u5173\u65ad\u7279\u6027<\/h2>\n<p>\u4e0b\u56fe\u4e3a\\(V_{IN}\\)\u9636\u8dc3\u5173\u65ad\u65f6\u8f93\u51fa\u7535\u538b\u6ce2\u5f62\u7684\u793a\u610f\u56fe\u3002\u5f53\\(V_{IN}\\)\u9636\u8dc3\u5173\u65ad\u65f6\uff0c\u7531\u4e8e\u8f93\u51fa\u7aef\u8f93\u51fa\u7535\u5bb9\u6b8b\u7559\u7684\u7535\u8377\u4f5c\u7528\uff0c\u8f93\u5165-\u8f93\u51fa\u7535\u538b\u4f1a\u51fa\u73b0\u53cd\u8f6c\uff08\u8f93\u51fa\u7535\u538b\u9ad8\u4e8e\u8f93\u5165\u7535\u538b\uff09\uff0c\u6b64\u65f6\u8f93\u51fa\u7535\u5bb9\u7684\u7535\u8377\u4f1a\u901a\u8fc7IC\u5185\u90e8\u5bc4\u751f\u5143\u4ef6\u5411\u8f93\u5165\u4fa7\u6cc4\u653e\u3002\u56e0\u6b64\uff0c\u8f93\u51fa\u7535\u538b\u4f1a\u968f\u7740\u8f93\u5165\u7535\u538b\u7684\u4e0b\u964d\u800c\u6025\u5267\u964d\u4f4e\uff0c\u5f53\\(V_{IN}\\)\u964d\u81f30V\u65f6\uff0c\u8f93\u51fa\u7535\u538b\u5c06\u7ef4\u6301\u5728\u5bc4\u751f\u5143\u4ef6\u5bfc\u901a\u7535\u538b\uff08\u7ea60.7V\uff09\uff0c\u4e0b\u964d\u901f\u5ea6\u8d8b\u4e8e\u5e73\u7f13\u3002\u6b64\u540e\uff0c\u7535\u538b\u4f1a\u4ee5\u8d1f\u8f7d\u7535\u963b\u7684\u65f6\u95f4\u5e38\u6570\u6301\u7eed\u4e0b\u964d\u3002\u5bf9\u4e8e\u7eaf\u963b\u6027\u8d1f\u8f7d\uff0c\u8f93\u51fa\u7535\u538b\u7684\u4e0b\u964d\u65f6\u95f4\u53ef\u901a\u8fc7\u4e0b\u5f0f\u8868\u793a\uff1a<\/p>\n<p><span class=\"mathjax-text\">\\(T_{\\mathrm{OFF}} = -C_\\mathrm{O} \\times R_\\mathrm{L} \\times \\ln{\\left(\\displaystyle \\frac{V_\\mathrm{C}}{V_\\mathrm{O}}\\right)} \\, \\left[\\mathrm{s}\\right]\\)<\/span><\/p>\n<p>\\(C_O\\)\uff1a\u8f93\u51fa\u7535\u5bb9 [F]\n\\(R_L\\)\uff1a\u8d1f\u8f7d\u7535\u963b\u3000[\u03a9]\n\\(V_O\\)\uff1a\u8f93\u51fa\u7535\u538b\u3000[V]\n\\(V_C\\)\uff1a\u6700\u7ec8\u4e0b\u964d\u7535\u538b\u3000[V]\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-27899 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/07\/012.png\" alt=\"\" width=\"232\" height=\"235\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>\u4e0b\u56fe\u4e3a\\(V_{IN}\\)\u7f13\u6162\u5173\u65ad\u65f6\u7684\u6ce2\u5f62\u793a\u610f\u56fe\u3002\u5f53\\(V_{IN}\\)\u7535\u538b\u4e0b\u964d\u81f3\u8f93\u5165-\u8f93\u51fa\u7535\u538b\u53d1\u751f\u53cd\u8f6c\u7684\u4e34\u754c\u70b9\u65f6\uff0c\u8f93\u51fa\u7535\u5bb9\u7535\u8377\u4f1a\u901a\u8fc7IC\u5185\u90e8\u7684\u5bc4\u751f\u5143\u4ef6\u5411\u8f93\u5165\u4fa7\u6cc4\u653e\u3002\u56e0\u6b64\uff0c\u8f93\u51fa\u7535\u538b\u4f1a\u968f\u7740\u8f93\u5165\u7535\u538b\u7684\u4e0b\u964d\u800c\u540c\u6b65\u964d\u4f4e\uff0c\u5f53\\(V_{IN}\\)\u964d\u81f30V\u65f6\uff0c\u8f93\u51fa\u7535\u538b\u4f1a\u7ef4\u6301\u5bc4\u751f\u5143\u4ef6\u7684\u5bfc\u901a\u7535\u538b\uff08\u7ea60.7V\uff09\uff0c\u4e0b\u964d\u901f\u5ea6\u8fdb\u4e00\u6b65\u653e\u7f13\u3002\u6b64\u540e\uff0c\u7535\u538b\u5c06\u4ee5\u8d1f\u8f7d\u7535\u963b\u7684\u65f6\u95f4\u5e38\u6570\u6301\u7eed\u4e0b\u964d\u3002\u8be5\u8fc7\u7a0b\u4e0e\\(V_{IN}\\)\u9636\u8dc3\u5173\u65ad\u65f6\u7684\u60c5\u5f62\u4e00\u6837\uff0c\u4f46\u7531\u4e8e\u5173\u65ad\u8fc7\u7a0b\u8f83\u4e3a\u5e73\u7f13\uff0c\u8f93\u51fa\u7535\u538b\u7684\u4e0b\u964d\u8d8b\u52bf\u4e5f\u76f8\u5bf9\u5e73\u7f13\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-27900 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/07\/013.png\" alt=\"\" width=\"228\" height=\"193\" \/><br \/>\n\u82e5\u8981\u6c42\\(V_{IN}\\)\u65ad\u5f00\u540e\u8f93\u51fa\u7535\u538b\u8fc5\u901f\u5f52\u96f6\uff0c\u5219\u9700\u589e\u8bbe\u5f3a\u5236\u6cc4\u653e\u8f93\u51fa\u7535\u5bb9\u7535\u8377\u7684\u653e\u7535\u7535\u8def\u3002<\/p>\n<h2>\u7ebf\u6027\u7a33\u538b\u5668\u7684\u6d6a\u6d8c\u7535\u6d41<\/h2>\n<p>\u65e0\u8bba\u662f\u5426\u6d89\u53ca<a href=\"https:\/\/www.wfjydl.com\/products\/power-management\/linear-regulators\/standard-voltage-regulators\/ba1117fp-product\">BA1117\u7cfb\u5217<\/a>\uff0c\u901a\u5e38\u5728\u63a5\u5165\u8f93\u5165\u7535\u6e90\u4e14\u8f93\u51fa\u5f00\u59cb\u5efa\u7acb\uff08\u542f\u52a8\uff09\u65f6\uff0c\u4f1a\u56e0\u8f93\u51fa\u7535\u5bb9\u5145\u7535\u4ea7\u751f\u6d6a\u6d8c\u7535\u6d41\u3002\u6b64\u65f6\u5373\u4f7f\u8f93\u51fa\u7535\u6d41\u503c\u8d85\u51fa\u63a8\u8350\u5de5\u4f5c\u8303\u56f4\u7684\u6700\u5927\u503c\uff0c\u7531\u4e8e\u5185\u7f6e\u8fc7\u6d41\u4fdd\u62a4\uff08OCP\uff1aOver Current Protection\uff09\u7535\u8def\u5c06\u5b9e\u65bd\u7535\u6d41\u9650\u5236\uff0c\u6545\u4e0d\u5f71\u54cd\u6b63\u5e38\u5de5\u4f5c\uff08\u5173\u4e8e\u8fc7\u6d41\u4fdd\u62a4\u53e6\u6587\u8bf4\u660e\uff09\u3002<br \/>\n\u4f46\u9700\u6ce8\u610f\uff0c\u9700\u8981\u786e\u4fdd\u8be5\u7535\u6d41\u6240\u5f71\u54cd\u7684\u7ed3\u6e29\\(T_J\\)\u4e0d\u8d85\u8fc7150\u2103\u3002\u77ed\u65f6\u8fc7\u6d41\u6240\u5f71\u54cd\u7684\u7ed3\u6e29\\(T_J\\)\u53ef\u901a\u8fc7\u77ac\u6001\u70ed\u963b\\(Z_{TH}\\)\u4f30\u7b97\u3002<br \/>\n\u77ac\u6001\u70ed\u963b\u662f\u4e00\u79cd\u5177\u6709\u65f6\u95f4\u53c2\u6570\u7684\u70ed\u963b\u3002\u4e25\u683c\u800c\u8a00\uff0c\\(T_J\\)\u5728\u901a\u7535\u7684\u65f6\u95f4\u70b9\u5f00\u59cb\u4e0a\u5347\uff08\u53d1\u70ed\uff09\uff0c\u7ecf\u8fc7\u4e00\u5b9a\u65f6\u95f4\u540e\u8d8b\u4e8e\u7a33\u5b9a\u3002\u5e38\u89c4\u70ed\u963b\\(\u03b8_{JA}\\)\uff0c\u662f\u7a33\u6001\u4e0b\u7684\u6e29\u5347\uff08\u53d1\u70ed\u91cf\uff09\u4e0e\u529f\u8017\u7684\u6bd4\u503c\uff1b\u800c\u77ac\u6001\u70ed\u963b\u5219\u662f\u901a\u7535\u540e\u7279\u5b9a\u65f6\u523b\u7684\u6e29\u5347\u4e0e\u8be5\u65f6\u523b\u529f\u8017\u7684\u6bd4\u503c\u3002\u4ee5\u4e0b\u662f\u5229\u7528\u77ac\u6001\u70ed\u963b\u8ba1\u7b97\\(T_J\\)\u7684\u516c\u5f0f\uff0c\u8be5\u516c\u5f0f\u662f\u5c06\u542b\u6709\\(\u03b8_{JA}\\)\u7684\u8ba1\u7b97\u516c\u5f0f\u4e2d\u7684\\(\u03b8_{JA}\\)\u66ff\u6362\u6210\\(Z_{TH}\\)\u5f97\u5230\u7684\u3002<\/p>\n<p><span class=\"mathjax-text\">\\(T_J = T_A + Z_{TH} \\times P \\, \\left[{\u2103}\\right]\\)<\/span><\/p>\n<p>\\(T_A\\)\uff1a\u73af\u5883\u6e29\u5ea6 [\u2103]\n\\(Z_{TH}\\)\uff1a\u7ed3\u70b9\u5230\u73af\u5883\u7684\u77ac\u6001\u70ed\u963b [\u2103\/W]\n\\(P\\)\uff1aIC\u529f\u8017 [W]\n<p>\\(P\\)\u4e3aIC\u529f\u8017\uff0c\u53ef\u901a\u8fc7\u4e0b\u5f0f\u8ba1\u7b97\u3002\u9700\u6ce8\u610f\uff1a\u8be5\u8ba1\u7b97\u516c\u5f0f\u9002\u7528\u4e8e\u7c7b\u4f3cBA1117\u7684\u65e0\u63a5\u5730\u5f15\u811a\u7684\u6d6e\u52a8\u5de5\u4f5c\u7c7b\u578b\uff1b\u5bf9\u4e8e\u5e26\u63a5\u5730\u5f15\u811a\u7684\u7c7b\u578b\uff0c\u516c\u5f0f\u4e2d\u7684\\(I_{ADJ}\\)\u9879\u9700\u6539\u4e3a\\(I_{IN}\\)\uff0d\\(I_{OUT}\\)\u3002\u6709\u5173\u5e26\u63a5\u5730\u5f15\u811a\u7684\u7c7b\u578b\u5c06\u53e6\u884c\u64b0\u6587\u8bf4\u660e\u3002<\/p>\n<p><span class=\"mathjax-text\">\\(P = \\left(V_{\\mathrm{IN}} \u2013 V_{\\mathrm{OUT}} \\right) \\times I_{\\mathrm{OUT}} + \\left(V_{\\mathrm{IN}} \\times I_{\\mathrm{ADJ}} \\right) \\, \\left[W\\right]\\)<\/span><\/p>\n<p>\\(V_{IN}\\)\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_{ADJ}\\)\uff1aADJ\u5f15\u811a\u7535\u6d41 [A]\n<p>\u5f53\\(I_{ADJ}\\) \u226a \\(I_{OUT}\\)\u65f6\uff0c\u53ef\u901a\u8fc7\u4e0b\u5f0f\u8ba1\u7b97\u3002<\/p>\n<p><span class=\"mathjax-text\">\\(P = \\left(V_{{IN}} \u2013 V_{{OUT}} \\right) \\times I_{{OUT}} \\, \\left[W\\right]\\)<\/span><\/p>\n<p>\u4e3a\u6f14\u793a\u8ba1\u7b97\u8fc7\u7a0b\uff0c\u73b0\u8bbe\u5b9a\u4ee5\u4e0b\u6761\u4ef6\uff1a\u5728TO252-3\u5c01\u88c5\u4e2d\uff0c\u73af\u5883\u6e29\u5ea6\\(T_A\\)=60\u2103\uff0c1.5A\u7684\u6d6a\u6d8c\u7535\u6d41\u6301\u7eed1ms\u3002\u7531\u53f3\u4fa7\u56fe\u8868\u53ef\u77e5\uff0c1ms\u65f6\u7684\u77ac\u6001\u70ed\u963b\u4e3a2.7\u2103\/W\u3002\u8f93\u5165\u7535\u538b\\(V_{IN}\\)=5V\uff0c\u8f93\u51fa\u7535\u538b\\(V_{OUT}\\)=3.3V\u3002\u5c06\u8fd9\u4e9b\u6570\u503c\u4ee3\u5165\u524d\u9762\u7ed9\u51fa\u7684\u7ed3\u6e29\\(T_J\\)\u8ba1\u7b97\u516c\u5f0f\u8fdb\u884c\u8ba1\u7b97\u3002<\/p>\n<p><span class=\"mathjax-text\">\\(T_\\mathrm{J} = 60\\,\\mathrm{\u2103} + 2.7 \\times \\left(5\\,\\mathrm{V} \u2013 3.3\\,\\mathrm{V}\\right) \\times 1.5\\,\\mathrm{A} = 66.9\\,\\mathrm{\u2103}\\)<\/span><\/p>\n<p>\u56e0\u4e3a\\(T_J\\)\u4f4e\u4e8e150\u2103\uff0c\u6240\u4ee5\u8be5\u6761\u4ef6\u4e0b\u4e0d\u5b58\u5728\u95ee\u9898\u3002<br \/>\n\u7531\u6b64\u53ef\u77e5\uff0c\u5f53\u6d6a\u6d8c\u7535\u6d41\u6301\u7eed\u65f6\u95f4\u4ec51ms\u5de6\u53f3\u65f6\uff0c\u7531\u4e8e\u82af\u7247\u6e29\u5ea6\uff08\\(T_J\\)\uff09\u4e0a\u5347\u5e45\u5ea6\u5f88\u5c0f\uff0c\u6d6a\u6d8c\u7535\u6d41\u5f15\u8d77\u7684\u6e29\u5347\u901a\u5e38\u4e0d\u4f1a\u6784\u6210\u95ee\u9898\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-27901 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/07\/014.png\" alt=\"\" width=\"444\" height=\"505\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2>\u7ebf\u6027\u7a33\u538b\u5668\u7684\u8fc7\u6d41\u4fdd\u62a4\uff08OCP\uff09<\/h2>\n<p>\u4e0b\u9762\u4ecb\u7ecd\u9488\u5bf9\u524d\u4e00\u8282\u63d0\u53ca\u7684\u8fc7\u6d41\u4fdd\u62a4\u529f\u80fd\u3002<\/p>\n<p>\u5f53IC\u7684\u8f93\u51fa\u7aef\u5bf9\u5730\u77ed\u8def\u65f6\uff0c\u7528\u4e8e\u9632\u6b62\u56e0\u8fc7\u7535\u6d41\u5bfc\u81f4IC\u635f\u574f\u7684\u529f\u80fd\u5373\u4e3a\u8fc7\u6d41\u4fdd\u62a4\u7535\u8def\uff0c\u5176\u82f1\u6587\u7f29\u5199\u4e3aOCP\uff08Over Current Protection\uff09\u3002\u5173\u4e8e\u8be5\u4fdd\u62a4\u529f\u80fd\uff0c\u9700\u8981\u7406\u89e3\u7684\u91cd\u8981\u4e00\u70b9\u662f\u5b83\u662f\u4e3a\u9632\u6b62IC\u635f\u574f\u800c\u8bbe\u8ba1\u7684\uff0c\u5e76\u975e\u7528\u4e8e\u4fdd\u62a4\u8d1f\u8f7d\uff08\u5982\u53d7\u7535\u8bbe\u5907\u7b49\uff09\u3001\u7535\u8def\u53ca\u88c5\u7f6e\u3002\u82e5\u4ee5\u4fdd\u62a4\u7535\u8def\u6216\u88c5\u7f6e\u4e3a\u76ee\u7684\uff0c\u5219\u9700\u4ee5\u4f7f\u7528\u4fdd\u9669\u4e1d\u6216\u5176\u4ed6\u7535\u6d41\u9650\u5236\u5668\u4ef6\u4e3a\u524d\u63d0\u3002<\/p>\n<p><a href=\"https:\/\/www.wfjydl.com\/products\/power-management\/linear-regulators\/standard-voltage-regulators\/ba1117fp-product\">BA1117\u7cfb\u5217<\/a>\u7684\u8fc7\u6d41\u4fdd\u62a4\u7279\u6027\u4e3a\u5982\u4e0b\u56fe\u6240\u793a\u7684\u4e0b\u5782\u7279\u6027\u3002A\u70b9\u662f\u8fc7\u6d41\u4fdd\u62a4\u89e6\u53d1\u70b9\uff0c\u5176\u5bf9\u5e94\u7684\u8f93\u51fa\u7535\u6d41\u7ea6\u4e3a1.7A\uff08\u6807\u51c6\u503c\uff09\u3002\u867d\u7136\u8fc7\u6d41\u4fdd\u62a4\u529f\u80fd\u88ab\u89e6\u53d1\u65f6\u8f93\u51fa\u7535\u6d41\u4e0b\u9650\u5b58\u5728\u5dee\u5f02\uff0c\u4f46\u7edd\u4e0d\u4f1a\u4f4e\u4e8e1A\u7684\u8f93\u51fa\u7535\u6d41\u4fdd\u8bc1\u503c\u3002\u5f53\u68c0\u6d4b\u5230\u8fc7\u6d41\u65f6\uff0c\u9650\u6d41\u7535\u8def\u7acb\u5373\u52a8\u4f5c\uff0c\u4f7f\u8f93\u51fa\u7535\u6d41\u7ef4\u6301\u6052\u5b9a\uff0c\u540c\u65f6\u8f93\u51fa\u7535\u538b\u8fd1\u4e4e\u5782\u76f4\u4e0b\u964d\u81f3B\u70b9\u3002\u6b64\u540e\uff0c\u53ea\u8981\u8fc7\u6d41\u72b6\u6001\u6301\u7eed\uff0c\u4fbf\u4f1a\u7ef4\u6301\u6b64\u72b6\u6001\u3002\u6362\u8a00\u4e4b\uff0c\u82e5\u8f93\u51fa\u77ed\u8def\u7531\u8d1f\u8f7d\u5bfc\u81f4\uff0c\u8d1f\u8f7d\u65e0\u6cd5\u5f97\u5230\u4fdd\u62a4\u3002\u5f53\u8fc7\u6d41\u72b6\u6001\u89e3\u9664\u540e\uff0c\u8f93\u51fa\u7535\u538b\u4f1a\u81ea\u52a8\u6062\u590d\u3002<\/p>\n<p>\u5728\u8f93\u51fa\u7535\u6d41\u8d85\u8fc71A\u7684\u4fdd\u8bc1\u503c\u3001\u4f46\u672a\u8fbe\u5230\u8fc7\u6d41\u4fdd\u62a4\u89e6\u53d1\u70b9\uff08\u6807\u51c6\u503c1.7A\uff09\u671f\u95f4\uff0c\u7ebf\u6027\u7a33\u538b\u5668\u867d\u80fd\u5de5\u4f5c\uff0c\u4f46\u7535\u6c14\u7279\u6027\u5c06\u4e0d\u53d7\u4fdd\u8bc1\uff08\u53c2\u7167\u6280\u672f\u89c4\u683c\u4e66\u7684\u89c4\u683c\u503c\u4fdd\u8bc1\u6761\u4ef6\uff09\u3002\u6b64\u5916\uff0c\u65e0\u8bba\u8f93\u51fa\u7535\u6d41\u5927\u5c0f\u5982\u4f55\uff0c\u82e5\u6301\u7eed\u5de5\u4f5c\u65f6\u8d85\u8fc7\u5141\u8bb8\u635f\u8017\uff08\u7edd\u5bf9\u6700\u5927\u989d\u5b9a\u503c1.2W\uff0cTO252-3\u5c01\u88c5\uff09\uff0c\u8fc7\u70ed\u4fdd\u62a4\u7535\u8def\u5c06\u542f\u52a8\u5e76\u5173\u95ed\u8f93\u51fa\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-27903 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/07\/015.png\" alt=\"\" width=\"297\" height=\"321\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2>\u7ebf\u6027\u7a33\u538b\u5668\u7684\u8fc7\u70ed\u4fdd\u62a4\uff08TSD\uff09<\/h2>\n<p>\u4e0e\u8fc7\u6d41\u4fdd\u62a4\u4e00\u6837\uff0c\u4e0b\u9762\u4ecb\u7ecd\u7ebf\u6027\u7a33\u538b\u5668\u7684\u4ee3\u8868\u6027\u4fdd\u62a4\u529f\u80fd\u2014\u2014\u8fc7\u70ed\u4fdd\u62a4\u3002<\/p>\n<p>\u8fc7\u70ed\u4fdd\u62a4\uff08TSD\uff1aThermal Shutdown\uff09\u7684\u4f5c\u7528\u662f\uff0c\u5f53\u8f93\u51fa\u77ed\u8def\u6216\u529f\u7387\u635f\u8017\u589e\u52a0\u5bfc\u81f4IC\u82af\u7247\u6e29\u5ea6\u8d85\u8fc7\u7edd\u5bf9\u6700\u5927\u989d\u5b9a\u503c\u65f6\uff0c\u4fdd\u62a4IC\u514d\u53d7\u8fc7\u70ed\u635f\u4f24\u3002\u9700\u7279\u522b\u6ce8\u610f\uff0c\u8be5\u4fdd\u62a4\u529f\u80fd\u5e76\u975e\u7528\u4e8e\u66ff\u4ee3\u8d1f\u8f7d\u548c\u88c5\u7f6e\u7684\u8fc7\u70ed\u4fdd\u62a4\u3002<\/p>\n<p><a href=\"https:\/\/www.wfjydl.com\/products\/power-management\/linear-regulators\/standard-voltage-regulators\/ba1117fp-product\">BA1117\u7cfb\u5217<\/a>\u7684\u8fc7\u70ed\u4fdd\u62a4\u7535\u8def\u5728\u68c0\u6d4b\u5230\u82af\u7247\u6e29\u5ea6\uff08\u7ed3\u6e29\uff09\u8d85\u8fc7\u7ea6155\u2103\uff08\u53c2\u8003\u503c\uff09\u65f6\uff0c\u5c06\u5173\u65ad\u7ebf\u6027\u7a33\u538b\u5668\u8f93\u51fa\u5e76\u5207\u65ad\u7535\u6d41\uff0c\u4ee5\u964d\u4f4e\u82af\u7247\u6e29\u5ea6\u3002\u5f53\u82af\u7247\u6e29\u5ea6\u964d\u81f3\u7ea6150\u2103\uff08\u53c2\u8003\u503c\uff09\u65f6\uff0c\u8f93\u51fa\u91cd\u65b0\u5f00\u542f\u5e76\u6062\u590d\u7535\u6d41\u4f9b\u5e94\u3002\u5728\u82af\u7247\u6e29\u5ea6\u5f02\u5e38\u5347\u9ad8\u539f\u56e0\u6d88\u9664\u524d\uff0c\u8f93\u51fa\u4f1a\u53cd\u590d\u5f00\u542f\u548c\u5173\u65ad\u3002\u5728\u6b64\u72b6\u6001\u4e0b\uff0cIC\u867d\u4e0d\u4f1a\u7acb\u5373\u635f\u574f\uff0c\u4f46\u957f\u671f\u53cd\u590d\u52a8\u4f5c\u4f1a\u5bfc\u81f4IC\u8001\u5316\u751a\u81f3\u635f\u574f\uff0c\u5e94\u907f\u514d\u8be5\u60c5\u51b5\u7684\u53d1\u751f\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-27904 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/07\/016.png\" alt=\"\" width=\"286\" height=\"302\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2>\u7ebf\u6027\u7a33\u538b\u5668\u7684\u7b49\u6548\u7535\u8def<\/h2>\n<p>\u6700\u540e\u4ecb\u7ecd\u7ebf\u6027\u7a33\u538b\u5668\u7684\u7b49\u6548\u7535\u8def\u3002<\/p>\n<p>\u4e0b\u56fe\u6240\u793a\u4e3a<a href=\"https:\/\/www.wfjydl.com\/products\/power-management\/linear-regulators\/standard-voltage-regulators\/ba1117fp-product\">BA1117\u7cfb\u5217<\/a>\u7684\u7b49\u6548\u7535\u8def\u3002\u901a\u8fc7\u7b49\u6548\u7535\u8def\u53ef\u5927\u81f4\u4e86\u89e3\u5404\u5f15\u811a\u4e4b\u95f4\u7684\u5185\u90e8\u8fde\u63a5\u5173\u7cfb\uff0c\u4ee5\u53ca\u8f93\u51fa\u7ea7\u4e0e\u8f93\u5165\u7ea7\u7535\u8def\u7684\u57fa\u672c\u7ed3\u6784\u3002\u5c3d\u7ba1\u5b9e\u9645\u7535\u8def\u66f4\u4e3a\u590d\u6742\uff0c\u4e14\u56e0IC\u7ed3\u6784\u800c\u5b58\u5728\u5bc4\u751f\u5143\u4ef6\u7b49\uff0c\u4f46\u7b49\u6548\u7535\u8def\u5bf9\u4e8e\u7406\u89e3\u5668\u4ef6\u7684\u5de5\u4f5c\u7279\u6027\u4e0e\u8868\u73b0\u5177\u6709\u91cd\u8981\u4f5c\u7528\u3002<\/p>\n<p>BA1117\u4f5c\u4e3a\u538b\u964d\u4e3a1V\uff5e1.2V\uff08\u6807\u51c6\u503c\uff09\u7684LDO\uff0c\u5176\u7279\u6027\u6e90\u4e8e\u8f93\u51fa\u7ea7\u91c7\u7528\u4e86NPN\u6676\u4f53\u7ba1\u4e0ePNP\u6676\u4f53\u7ba1\u7684\u8fbe\u6797\u987f\u8fde\u63a5\u7ed3\u6784\u3002\u6b64\u5916\uff0c\u901a\u8fc7\u7b49\u6548\u7535\u8def\u4e5f\u53ef\u5927\u81f4\u7406\u89e3\u8fc7\u6d41\u4fdd\u62a4\u7535\u8def\u548c\u8fc7\u70ed\u4fdd\u62a4\u7535\u8def\u7684\u5de5\u4f5c\u539f\u7406\u3002\u5c3d\u7ba1\u8fd9\u90e8\u5206\u5e76\u975e\u5fc5\u987b\u7814\u7a76\u7684\u5185\u5bb9\uff0c\u4f46\u53ef\u4f5c\u4e3a\u6df1\u5316\u7406\u89e3\u7684\u53c2\u8003\u8d44\u6599\u3002<\/p>\n<p><img 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