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id=\"toc4\">NPN\u6676\u4f53\u7ba1\u7684\u4f4e\u8fb9\u5e03\u7ebf\uff08\u57fa\u672c\u65b9\u5f0f\u89c1\u793a\u610f\u56fe\uff09<\/h2>\n<p>\u4f4e\u8fb9\u5e03\u7ebf\u5bfc\u81f4\u5de5\u4f5c\u6545\u969c\u7684\u6700\u5927\u539f\u56e0\u5728\u4e8e\u7535\u6d41\u8def\u5f84\u7684\u5e03\u6392\u987a\u5e8f\u9519\u8bef\u3002\u5728\u6b63\u786e\u7684\u7535\u8def\u4e2d\uff0c\u7535\u6d41\u5c06\u6309\u7167\u7535\u6e90\u2192\u8d1f\u8f7d\u2192\u96c6\u7535\u6781\u2192\u53d1\u5c04\u6781\u2192GND\u7684\u987a\u5e8f\u6d41\u52a8\u3002\u54ea\u6015\u8bbe\u8ba1\u8005\u5c06\u5176\u4e2d\u4e00\u6761\u8d70\u7ebf\u63a5\u53cd\uff0c\u6676\u4f53\u7ba1\u90fd\u53ef\u80fd\u65e0\u6cd5\u6b63\u5e38\u5bfc\u901a\uff0c\u6216\u8005\u56e0\u53cd\u5411\u504f\u7f6e\u800c\u635f\u574f\u3002\u7535\u8def\u56fe\u7b26\u53f7\u4e2d\u7684\u53d1\u5c04\u6781\u7bad\u5934\u6307\u793a\u7535\u6d41\u65b9\u5411\uff0c\u9075\u5faa\u6b64\u65b9\u5411\u53ef\u907f\u514d\u6781\u6027\u9519\u8bef\u3002\u5728\u96c6\u7535\u6781\u5f00\u8def\u7535\u8def\u5e03\u7ebf\u4e2d\uff0c\u8d1f\u8f7d\u672c\u8eab\u8fde\u63a5\u81f3\u7535\u6e90\u4fa7\uff0c\u5e76\u901a\u8fc7\u6676\u4f53\u7ba1\u4e0b\u62c9\u81f3GND\u3002\u4e0b\u9762\u7684\u7535\u8def\u56fe\u4e2d\uff0c\u5c55\u793a\u4e86\u7535\u963b\u6027\u8d1f\u8f7d\u4e0e\u7535\u6e90\u7535\u538b\u3001\u96c6\u7535\u6781\u5f15\u811a\u8f93\u51fa\u7535\u538b\u4e4b\u95f4\u7684\u4f4d\u7f6e\u5173\u7cfb\u3002NPN\u6676\u4f53\u7ba1\u4e3a\u4e09\u5c42\u7ed3\u6784\uff08\u4e24\u5c42n\u578b\u533a\u5939\u7740\u4e00\u5c42\u8584p\u578b\u57fa\u533a\uff09\uff0c\u901a\u5e38\u53d1\u5c04\u533a\u4e3a\u91cd\u63ba\u6742\uff0c\u57fa\u533a\u4e3a\u8f7b\u63ba\u6742\uff0c\u96c6\u7535\u533a\u4e3a\u4e2d\u7b49\u63ba\u6742\u3002<\/p>\n<h3 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class=\"alignnone wp-image-29627\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/04\/\u753b\u50cf6.png\" alt=\"\u4f4e\u8fb9\u5f00\u5173\u7684\u6b63\u786e\u63a5\u7ebf\u65b9\u5f0f\uff08+V\u2192\u8d1f\u8f7d\u2192C\u2192E\u2192GND\uff09\" width=\"700\" height=\"394\" \/><\/p>\n<p>\u82e5\u98a0\u5012\u6b64\u987a\u5e8f\uff0c\u7279\u6027\u5c06\u663e\u8457\u6076\u5316\uff0c\u635f\u574f\u98ce\u9669\u4e5f\u968f\u4e4b\u5347\u9ad8\u3002CE\u53cd\u63a5\u5c5e\u4e8e\u975e\u9884\u671f\u6a21\u5f0f\uff0c\u53cd\u5411\u6a21\u5f0f\\(\u03b2\\)\u503c\u8f83\u6b63\u5411\u6a21\u5f0f\u4f4e\u4e00\u4e2a\u6570\u91cf\u7ea7\uff0c\u4e14\u8010\u538b\u6027\u80fd\u53ef\u80fd\u8d85\u51fa\u89c4\u683c\u4fdd\u8bc1\u8303\u56f4\u3002\u8fd9\u79cd\u53cd\u63a5\u5373\u4f7f\u662f\u8bc4\u4f30\u7528\u9014\u7684\u4e34\u65f6\u8fde\u63a5\u4e5f\u4e0d\u63a8\u8350\u3002<\/p>\n<p><strong>\u901a\u8fc7\u7b26\u53f7\u548c\u7bad\u5934\u65b9\u5411\u9632\u6b62\u6781\u6027\u9519\u8bef<\/strong><br \/>\nNPN\u6676\u4f53\u7ba1\u7684\u7535\u8def\u56fe\u7b26\u53f7\u4e2d\uff0c\u53d1\u5c04\u6781\u7bad\u5934\u6307\u5411\u5916\u4fa7\uff08\u5373\u79bb\u5f00\u6676\u4f53\u7ba1\u7684\u65b9\u5411\uff09\u3002\u8be5\u7bad\u5934\u6307\u793a\u5e38\u89c4\u7535\u6d41\u65b9\u5411\uff08NPN\u578b\u5411\u5916\uff0cPNP\u578b\u5411\u5185\uff09\u3002\u53ef\u901a\u8fc7\u6676\u4f53\u7ba1\u7b26\u53f7\u7684\u7bad\u5934\u6765\u5224\u522b\u6781\u6027\u3002\u65e0\u8bbaGND\u65b9\u5411\u5982\u4f55\uff0c\u5747\u4ee5\u7bad\u5934\u6307\u5411\u6765\u5224\u522b\u6781\u6027\u3002\u786e\u8ba4\u8be5\u65b9\u5411\u5373\u53ef\u907f\u514d\u4e0ePNP\u6df7\u6dc6\u3002\u53d1\u5c04\u533a\u3001\u96c6\u7535\u533a\u548c\u57fa\u533a\u7684\u4e09\u5c42\u7ed3\u6784\u540d\u79f0\u5df2\u5728\u6982\u8ff0\u6587\u7ae0\u4e2d\u4ecb\u7ecd\u8fc7\u4e86\u3002<\/p>\n<p>\u82e5\u5c06\u7bad\u5934\u65b9\u5411\u89e3\u8bfb\u9519\u8bef\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u53d1\u5c04\u6781\u4e0e\u96c6\u7535\u6781\u6df7\u6dc6\u3002\u5173\u4e8e\u8be6\u7ec6\u7684\u7b26\u53f7\u5b9a\u4e49\uff0c\u53ef\u5728\u201c<a href=\"https:\/\/techclass.wfjydl.com\/knowledge\/transistors-diodes\/transistors\/27319\/\">\u53cc\u6781\u6676\u4f53\u7ba1\uff5c\u5de5\u4f5c\u539f\u7406\u53ca\u4f7f\u7528\u65b9\u6cd5\uff08NPN\/PNP\uff09<\/a>\u201d\u4e00\u6587\u4e2d\u67e5\u9605\u3002<\/p>\n<h3 id=\"toc6\">\u96c6\u7535\u6781\u5f00\u8def\u7535\u8def\u5e03\u7ebf\u7684\u6ce8\u610f\u4e8b\u9879<\/h3>\n<p>\u5728\u96c6\u7535\u6781\u5f00\u8def\u7535\u8def\u5e03\u7ebf\u4e2d\uff0c\u9700\u5c06\u8d1f\u8f7d\u7684\u4e00\u7aef\u8fde\u63a5\u4e8eNPN\u6676\u4f53\u7ba1\u7684\u96c6\u7535\u6781\uff0c\u8d1f\u8f7d\u7684\u53e6\u4e00\u7aef\u8fde\u63a5\u7535\u6e90\uff08+V\uff09\u3002\u6676\u4f53\u7ba1\u5bfc\u901a\u65f6\uff0c\u96c6\u7535\u6781\u7535\u4f4d\u5c06\u4e0b\u964d\u81f3\\(V_{CE(sat)}\\)\u5de6\u53f3\uff0c\u4f7f\u8d1f\u8f7d\u6d41\u8fc7\u7535\u6d41\u3002\u5728\u5173\u65ad\u72b6\u6001\u4e0b\uff0c\u96c6\u7535\u6781\u5c06\u5448\u73b0\u9ad8\u963b\u6297\u72b6\u6001\uff0c\u8d1f\u8f7d\u7535\u6d41\u57fa\u672c\u4e3a\u96f6\uff08\u6f0f\u7535\u6d41\\(I_{CEO}\\)\u548c\\(I_{CEX}\\)\u8bf7\u901a\u8fc7\u6280\u672f\u89c4\u683c\u4e66\u786e\u8ba4\u3002\u7531\u4e8e\u6e29\u5ea6\u4e0a\u5347\u4f1a\u5bfc\u81f4\u6f0f\u7535\u6d41\u589e\u52a0\uff0c\u9700\u9884\u5148\u8bbe\u5b9a\u4e00\u4e2a\u9608\u503c\u4ee5\u5224\u5b9a\u4f55\u79cd\u7a0b\u5ea6\u53ef\u89c6\u4e3a\u201c\u9ad8\u963b\u6297\u72b6\u6001\u201d\uff09\u3002\u5173\u65ad\u65f6\u7684\u6f0f\u7535\u6d41\u4f1a\u4f53\u73b0\u5728\u8f93\u51fa\u7279\u6027\u4e0a\uff0c\u56e0\u6b64\u786e\u8ba4\u53cd\u5411\u504f\u7f6e\u6761\u4ef6\u4e0b\u7684\u89c4\u683c\u662f\u884c\u4e4b\u6709\u6548\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u8fd9\u79cd\u7ebf\u8def\u9002\u7528\u4e8e\u7ee7\u7535\u5668\u9a71\u52a8\u3001LED\u70b9\u4eae\u7b49\u76f4\u6d41\u8d1f\u8f7d\u5e94\u7528\u3002\u4e0a\u62c9\u7535\u963b\u7684\u503c\u4f1a\u5f71\u54cd\u8017\u7535\u91cf\u548c\u54cd\u5e94\u901f\u5ea6\uff0c\u9700\u6839\u636e\u5177\u4f53\u5e94\u7528\u573a\u666f\u8fdb\u884c\u9009\u62e9\u3002<\/p>\n<h2 id=\"toc7\">NPN\u6676\u4f53\u7ba1\u6b63\u5e38\u8fdb\u884c\u5f00\u5173\u5de5\u4f5c\u7684\u6761\u4ef6\uff08\u533a\u5206\u622a\u6b62\u4e0e\u9971\u548c\uff09<\/h2>\n<p>\u80fd\u5426\u6b63\u5e38\u8fdb\u884c\u5f00\u5173\u5de5\u4f5c\uff0c\u53d6\u51b3\u4e8e\u80fd\u5426\u5c06NPN\u6676\u4f53\u7ba1\u7684\u5de5\u4f5c\u70b9\u63a7\u5236\u5728\u622a\u6b62\u548c\u9971\u548c\u4e24\u79cd\u72b6\u6001\u3002\u5728\u622a\u6b62\u72b6\u6001\u4e0b\uff0c\u57fa\u6781-\u53d1\u5c04\u6781\u7ed3\u65e0\u6cd5\u5f62\u6210\u6b63\u5411\u504f\u7f6e\uff0c\u96c6\u7535\u6781\u7535\u6d41\u51e0\u4e4e\u65e0\u6cd5\u6d41\u901a\u3002\u5728\u9971\u548c\u72b6\u6001\u4e0b\uff0c\\(V_{CE}\\)\u4f1a\u964d\u5230\u975e\u5e38\u4f4e\uff0c\u6b64\u65f6\u96c6\u7535\u6781-\u53d1\u5c04\u6781\u95f4\u7684\u7535\u963b\u8fbe\u5230\u6700\u5c0f\u3002\u6676\u4f53\u7ba1\u5c31\u50cf\u95ed\u5408\u7684\u5f00\u5173\u3002\u6676\u4f53\u7ba1\u82e5\u6301\u7eed\u5904\u4e8e\u653e\u5927\u533a\uff0c\u53d1\u70ed\u91cf\u5c06\u589e\u52a0\uff0c\u53ef\u80fd\u5bfc\u81f4\u5668\u4ef6\u635f\u574f\u3002\u5728\u653e\u5927\u533a\uff0c\u57fa\u6781-\u53d1\u5c04\u6781\u7ed3\u5904\u4e8e\u6b63\u5411\u504f\u7f6e\u72b6\u6001\uff0c\u800c\u57fa\u6781-\u96c6\u7535\u6781\u7ed3\u5728\u591a\u6570\u60c5\u51b5\u4e0b\u5904\u4e8e\u53cd\u5411\u504f\u7f6e\u72b6\u6001\u3002\u672c\u8282\u7684\u524d\u63d0\u662f\u6676\u4f53\u7ba1\u5df2\u7ecf\u91c7\u53d6\u4e86\u4e0d\u4f1a\u6ede\u7559\u4e8e\u653e\u5927\u533a\u7684\u8bbe\u8ba1\u3002\u7406\u89e3\u4e86\\(V_{BE}\\)\u3001\\(V_{CE(sat)}\\)\u3001\\(I_C\\)\u4e09\u8005\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5373\u53ef\u4e13\u6ce8\u4e8e\u5de5\u4f5c\u6761\u4ef6\u8bbe\u5b9a\u3002\u5173\u4e8e\u8d1f\u8f7d\u7ebf\u3001\u5de5\u4f5c\u70b9\u3001\u8f93\u5165\u8f93\u51fa\u7279\u6027\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u5c06\u4f5c\u4e3a\u653e\u5927\u7535\u8def\u8bbe\u8ba1\u7684\u57fa\u7840\u77e5\u8bc6\u5728\u53e6\u4e00\u7bc7\u6587\u7ae0\u4e2d\u4e13\u95e8\u9610\u8ff0\u3002<\/p>\n<h3 id=\"toc8\">\\(V_{BE}\\)\u3001\\(V_{CE(sat)}\\)\u3001\\(I_C\\)\u7684\u5173\u952e\u8981\u70b9<\/h3>\n<p>\u80fd\u5426\u6b63\u5e38\u8fdb\u884c\u5f00\u5173\u5de5\u4f5c\uff0c\u53ef\u4f9d\u636e\\(V_{BE}\\)\u3001\\(V_{CE(sat)}\\)\u3001\\(I_C\\)\u8fd9\u4e09\u9879\u53c2\u6570\u8fdb\u884c\u5224\u5b9a\u3002\u8fd9\u4e9b\u53c2\u6570\u5c06\u6210\u4e3a\u533a\u5206\u622a\u6b62\u4e0e\u9971\u548c\u72b6\u6001\u7684\u5224\u5b9a\u6807\u51c6\u3002\u901a\u8fc7\u65bd\u52a0\u7535\u538b\u548c\u8d1f\u8f7d\u7535\u963b\u7684\u7ec4\u5408\u51b3\u5b9a\u8f93\u51fa\u7535\u8def\u7684\u7535\u538b\u548c\u7535\u6d41\uff0c\u82e5\u6676\u4f53\u7ba1\u5145\u5206\u9971\u548c\uff0c<span class=\"u-ff-mathjax\">V<sub>CE<\/sub><\/span>\u5c06\u964d\u81f3\u63a5\u8fd1\u95ed\u5408\u5f00\u5173\u7684\u975e\u5e38\u5c0f\u7684\u503c\u3002<\/p>\n<p><strong>\\(V_{BE}\\)\uff08\u57fa\u6781-\u53d1\u5c04\u6781\u95f4\u7535\u538b\uff09<\/strong>\uff1a\u5728\u5ba4\u6e29\u4e14\\(I_C\\)\u2272100mA\u7684\u5c0f\u4fe1\u53f7\u6676\u4f53\u7ba1\u4e2d\uff0c\u901a\u5e38\u8ba4\u4e3a\u57fa\u6781\u7535\u6d41\u5f00\u59cb\u6709\u6548\u4e0a\u5347\u7684\\(V_{BE}\\)\u503c\u7ea6\u4e3a0.6\u301c0.7V\uff08\u6e29\u5ea6\u7cfb\u6570\u7ea6\u4e3a\u22122mV\/\u2103\uff09\u3002\u82e5\u65e0\u6cd5\u786e\u4fdd\u8be5\u6b63\u5411\u504f\u7f6e\u7535\u538b\u53ca\u76f8\u5e94\u7684\u57fa\u6781\u7535\u6d41\uff0c\u6676\u4f53\u7ba1\u5c06\u65e0\u6cd5\u5145\u5206\u5bfc\u901a\u3002<\/p>\n<p><strong>\\(V_{CE(sat)}\\)\uff08\u9971\u548c\u65f6\u7684\u96c6\u7535\u6781-\u53d1\u5c04\u6781\u95f4\u7535\u538b\uff09<\/strong>\uff1a\u9971\u548c\u65f6\u7684\\(V_{CE(sat)}\\)\u503c\u4f1a\u56e0\u5668\u4ef6\u548c\u7535\u6d41\u6761\u4ef6\u800c\u5f02\u3002\u5c0f\u4fe1\u53f7\u6676\u4f53\u7ba1\u7684\u53c2\u8003\u57fa\u51c6\u503c\u901a\u5e38\u4e3a0.1\uff5e0.3V\u3002\u6d4b\u91cf\u503c\u63a5\u8fd11V\u65f6\uff0c\u672a\u8fbe\u5230\u9971\u548c\u72b6\u6001<\/p>\n<p><strong>\\(I_C\\)\uff08\u96c6\u7535\u6781\u7535\u6d41\uff09<\/strong>\uff1a\u9a71\u52a8\u8d1f\u8f7d\u65f6\u6d41\u7ecf\u7684\u7535\u6d41\u3002\u786e\u8ba4\u5b9e\u6d4b\u503c\u662f\u5426\u8d85\u8fc7\u6280\u672f\u89c4\u683c\u4e66\u4e2d\u7684\u6700\u5927\u989d\u5b9a\u503c\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/04\/04-conditions-for-successful-npn-transistor-switching-operation.png\" alt=\"NPN\u6676\u4f53\u7ba1\u6b63\u5e38\u8fdb\u884c\u5f00\u5173\u5de5\u4f5c\u7684\u6761\u4ef6\" width=\"700\" height=\"394\" \/><\/p>\n<h3 id=\"toc9\">\u907f\u514d\u8fdb\u5165\u653e\u5927\u533a\u7684\u601d\u8def<\/h3>\n<p>\u57fa\u6781\u7535\u6d41\u4e0d\u8db3\u65f6\uff0c\u6676\u4f53\u7ba1\u5c06\u5728\u622a\u6b62\u533a\u548c\u9971\u548c\u533a\u4e4b\u95f4\u7684\u4e2d\u95f4\u72b6\u6001\uff08\u653e\u5927\u533a\uff09\u4e2d\u4f5c\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u96c6\u7535\u6781-\u53d1\u5c04\u6781\u95f4\u4ea7\u751f\u7535\u538b\u964d\u3002\u5728\u8fd9\u79cd\u72b6\u6001\u4e0b\u53d1\u70ed\u91cf\u4f1a\u589e\u52a0\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8bef\u52a8\u4f5c\u6216\u635f\u574f\u3002\u9700\u8981\u7ed9\u57fa\u6781\u7535\u6d41\u9884\u7559\u88d5\u5ea6\uff0c\u786e\u4fdd\u6676\u4f53\u7ba1\u5207\u5b9e\u8fdb\u5165\u9971\u548c\u72b6\u6001\u3002<\/p>\n<p>\u4f5c\u4e3a\u8861\u91cf\u8bbe\u8ba1\u88d5\u5ea6\u7684\u6307\u6807\uff0c\u6709\u4e00\u79cd\u79f0\u4e3a\u201c\\(\u03b2\\)\u5f3a\u5236\uff08forced\\(\u03b2\\)\uff09\u201d\u7684\u6982\u5ff5\u3002\u6280\u672f\u89c4\u683c\u4e66\u4e2d\u8bb0\u8f7d\u7684\\(h_{FE}\\)\uff08\u76f4\u6d41\u7535\u6d41\u653e\u5927\u7cfb\u6570\uff09\u4e3b\u8981\u662f\u5728\u653e\u5927\u533a\u6d4b\u5f97\u7684\u503c\uff0c\u800c\u5728\u9971\u548c\u533a\u4f1a\u56e0\u57fa\u6781-\u53d1\u5c04\u6781\u7535\u538b\u548c\u5185\u963b\u7684\u5f71\u54cd\uff0c\u5b9e\u9645\u6709\u6548\u653e\u5927\u500d\u6570\u5c06\u4e0b\u964d\u3002\u56e0\u6b64\uff0c\u5355\u7eaf\u91c7\u7528\\(I_B\\)\uff1d\\(I_C\\)\/\\(h_{FE}\\)\u7684\u8bbe\u8ba1\u503c\uff0c\u76f8\u5f53\u4e8e\u5728\u9971\u548c\u533a\u548c\u653e\u5927\u533a\u7684\u8fb9\u754c\u9644\u8fd1\u5de5\u4f5c\uff0c\u5f53\u8003\u8651\u5230\u6e29\u5ea6\u53d8\u5316\u548c\u5668\u4ef6\u4e2a\u4f53\u5dee\u5f02\u7b49\u56e0\u7d20\uff0c\u8fd9\u6837\u7684\u8bbe\u8ba1\u79f0\u4e0d\u4e0a\u5b89\u5168\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u4e3a\u4e86\u786e\u4fdd\u6676\u4f53\u7ba1\u53ef\u9760\u5730\u8fdb\u5165\u9971\u548c\u72b6\u6001\uff0c\u4f1a\u57fa\u4e8e\u8fdc\u5c0f\u4e8e\u6280\u672f\u89c4\u683c\u4e66\u4e2d\\(h_{FE}\\)\u7684\u503c\uff08\u4f8b\u5982\u8bbe\u60f3\\(\u03b2\\)\u5f3a\u5236\u225210\u301c20\uff09\u6765\u8bbe\u5b9a\u57fa\u6781\u7535\u6d41\u3002\u5bf9\u4e8e\\(h_{FE}\\)\u503c\u5728100\u5de6\u53f3\u7684\u6676\u4f53\u7ba1\uff0c\u8bbe\u8ba1\u65f6\u53ef\u9075\u5faa\u4e00\u4e2a\u5b9e\u7528\u7684\u53c2\u8003\u51c6\u5219\uff1a\u76f8\u5bf9\u4e8e\u76ee\u6807\u96c6\u7535\u6781\u7535\u6d41\\(I_C\\)\uff0c\u4f7f\u57fa\u6781\u7535\u6d41\\(I_B\\)\u2248\\(I_C\\)\/10\u3002<\/p>\n<h2 id=\"toc10\">\u4fdd\u62a4\u548c\u5e03\u7ebf\u6280\u5de7\uff08\u4f7f\u4f4e\u8fb9NPN\u6676\u4f53\u7ba1\u7a33\u5b9a\u5de5\u4f5c\uff09<\/h2>\n<p>\u5728\u611f\u6027\u8d1f\u8f7d\u9a71\u52a8\u7535\u8def\u4e2d\uff0c\u5f00\u5173\u65ad\u5f00\u65f6\u4ea7\u751f\u7684\u53cd\u7535\u52a8\u52bf\u4f1a\u589e\u5927\u6676\u4f53\u7ba1\u635f\u574f\u7684\u98ce\u9669\u3002\u7ee7\u7535\u5668\u548c\u7535\u673a\u7b49\u8d1f\u8f7d\u9a71\u52a8\u7535\u8def\u5728\u65ad\u5f00\u5f00\u5173\u65f6\uff0c\u4f1a\u4ea7\u751f\u53cd\u5411\u7535\u52a8\u52bf\u3002\u5f53\u8be5\u7535\u538b\u8d85\u8fc7\u6676\u4f53\u7ba1\u7684\u8010\u538b\u503c\u65f6\uff0c\u5668\u4ef6\u5c06\u88ab\u635f\u574f\u3002\u5c06\u7eed\u6d41\u4e8c\u6781\u7ba1\u4e0e\u8d1f\u8f7d\u5e76\u8054\u8fde\u63a5\uff0c\u53ef\u5438\u6536\u53cd\u5411\u7535\u52a8\u52bf\uff0c\u4ece\u800c\u4fdd\u62a4\u6676\u4f53\u7ba1\u3002\u5f53\u57fa\u6781\u5904\u4e8e\u60ac\u7a7a\u72b6\u6001\uff08\u672a\u4e0e\u4efb\u4f55\u7535\u5e73\u53ef\u9760\u8fde\u63a5\uff0c\u7535\u4f4d\u4e0d\u786e\u5b9a\uff09\u65f6\uff0c\u53ef\u80fd\u5bfc\u81f4\u8bef\u52a8\u4f5c\uff0c\u56e0\u6b64\u9700\u901a\u8fc7\u4e0b\u62c9\u7535\u963b\u4f7f\u5176\u7a33\u5b9a\u5de5\u4f5c\u3002\u7f29\u77ed\u63a5\u5730\u56de\u8def\u7684\u5e03\u7ebf\u957f\u5ea6\uff0c\u53ef\u63d0\u9ad8\u6297\u566a\u6027\u80fd\u3002\u8fbe\u6797\u987f\u8fde\u63a5\u867d\u53ef\u63d0\u9ad8\u7535\u6d41\u653e\u5927\u7cfb\u6570\uff0c\u4f46\u9700\u4ee5\\(V_{CE(sat)}\\)\u4e0a\u5347\u548c\u5f00\u5173\u5ef6\u8fdf\u4e3a\u4ee3\u4ef7\u3002<\/p>\n<h3 id=\"toc11\">\u7ee7\u7535\u5668\u548c\u7535\u673a\u5fc5\u987b\u914d\u5907\u7eed\u6d41\u4e8c\u6781\u7ba1<\/h3>\n<p>\u5728\u9a71\u52a8\u611f\u6027\u8d1f\u8f7d\uff08\u7ee7\u7535\u5668\u3001\u7535\u673a\u3001\u7535\u78c1\u9600\uff09\u7684\u7535\u8def\u4e2d\uff0c\u5f53\u6676\u4f53\u7ba1\u5173\u65ad\u77ac\u95f4\u4f1a\u4ea7\u751f\u53cd\u5411\u7535\u52a8\u52bf\u3002\u5f53\u8be5\u7535\u538b\u8d85\u8fc7\u6676\u4f53\u7ba1\u7684\u8010\u538b\u503c\u65f6\uff0c\u96c6\u7535\u6781-\u53d1\u5c04\u6781\u95f4\u5c06\u88ab\u51fb\u7a7f\u3002<\/p>\n<p>\u7eed\u6d41\u4e8c\u6781\u7ba1\u9700\u4e0e\u8d1f\u8f7d\u5e76\u8054\u8fde\u63a5\uff0c\u5176\u9634\u6781\u4e0e+V\u4fa7\u8fde\u63a5\uff0c\u9633\u6781\u4e0e\u96c6\u7535\u6781\u4fa7\uff08\u8d1f\u8f7d\u6676\u4f53\u7ba1\u4fa7\uff09\u8fde\u63a5\u3002\u5f53\u6676\u4f53\u7ba1\u5173\u65ad\u65f6\uff0c\u8d1f\u8f7d\u4e2d\u50a8\u5b58\u7684\u80fd\u91cf\u901a\u8fc7\u4e8c\u6781\u7ba1\u5f62\u6210\u56de\u8def\uff0c\u4ece\u800c\u5438\u6536\u53cd\u5411\u7535\u52a8\u52bf\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/04\/05-flyback-diode-placement-in-inductive-load-driver.png\" alt=\"\u914d\u7f6e\u7eed\u6d41\u4e8c\u6781\u7ba1\" width=\"700\" height=\"394\" \/><\/p>\n<p>\u63a5\u5165\u4e8c\u6781\u7ba1\u53ef\u6291\u5236\u53cd\u5411\u7535\u52a8\u52bf\uff0c\u4f46\u4f1a\u5bfc\u81f4\u7535\u6d41\u8870\u51cf\u53d8\u7f13\uff0c\u7ee7\u7535\u5668\u91ca\u653e\u52a8\u4f5c\u7565\u6709\u5ef6\u8fdf\u3002\u82e5\u9700\u9ad8\u901f\u622a\u6b62\uff0c\u53ef\u8003\u8651\u4e32\u8054\u9f50\u7eb3\u4e8c\u6781\u7ba1\u6216\u589e\u52a0RC\u7f13\u51b2\u7535\u8def\u3002\u5728\u65e0\u4e8c\u6781\u7ba1\u7684\u7535\u8def\u4e2d\uff0c\u53cd\u5411\u7535\u52a8\u52bf\u7684\u5e45\u503c\u4e0e\u5668\u4ef6\u8010\u538b\u503c\u7684\u5173\u7cfb\u53ef\u80fd\u5bfc\u81f4\u9996\u6b21\u5f00\u5173\u52a8\u4f5c\u65f6\u5b58\u5728\u51fb\u7a7f\u98ce\u9669\u3002<\/p>\n<h3 id=\"toc12\">\u9884\u9632\u57fa\u6781\u60ac\u7a7a\u4e0e\u63a5\u5730\u56de\u8def\u8d70\u7ebf<\/h3>\n<p>\u5fae\u63a7\u5236\u5668\u7684\u8f93\u51fa\u5f15\u811a\u5904\u4e8e\u9ad8\u963b\u6297\u72b6\u6001\uff08\u5982\u542f\u52a8\u65f6\u6216\u521d\u59cb\u5316\u671f\u95f4\uff09\u65f6\uff0cNPN\u6676\u4f53\u7ba1\u7684\u57fa\u6781\u4f1a\u60ac\u7a7a\uff0c\u5bfc\u81f4\u6676\u4f53\u7ba1\u53d1\u751f\u8bef\u52a8\u4f5c\u3002\u5b9e\u9645\u4e0a\u5b58\u5728\u56e0\u566a\u58f0\u5bfc\u81f4\u57fa\u6781\u7535\u4f4d\u4e0d\u7a33\u5b9a\uff0c\u4ece\u800c\u4f7f\u8d1f\u8f7d\u5728\u975e\u9884\u671f\u65f6\u673a\u5bfc\u901a\u7684\u6848\u4f8b\u3002\u5728\u57fa\u6781\u4e0eGND\u4e4b\u95f4\u914d\u7f6e\u4e0b\u62c9\u7535\u963b\uff08\u5efa\u8bae10k\u03a9\uff5e100k\u03a9\uff09\uff0c\u53ef\u786e\u4fdd\u57fa\u6781\u7535\u4f4d\u7a33\u5b9a\u7ef4\u6301\u57280V\u3002\u6700\u4f73\u503c\u4f1a\u56e0\u8f93\u5165\u5668\u4ef6\u548c\u566a\u58f0\u73af\u5883\u800c\u6709\u6240\u6ce2\u52a8\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img 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