{"id":967,"date":"2026-04-23T11:26:04","date_gmt":"2026-04-23T03:26:04","guid":{"rendered":"https:\/\/shen-jia.com.tw\/?p=967"},"modified":"2026-04-23T11:26:35","modified_gmt":"2026-04-23T03:26:35","slug":"mosfet-selection-guide","status":"publish","type":"post","link":"https:\/\/shen-jia.com.tw\/en\/mosfet-selection-guide\/","title":{"rendered":"MOSFET Selection Guide: Key Parameters for Power Management and Battery Protection"},"content":{"rendered":"<p>\u96a8\u8457\u6d88\u8cbb\u96fb\u5b50\u3001\u5de5\u696d\u63a7\u5236\u548c\u65b0\u80fd\u6e90\u8a2d\u5099\u7684\u5feb\u901f\u767c\u5c55\uff0cMOSFET\uff08Metal-Oxide-Semiconductor Field-Effect Transistor\uff0c\u91d1\u5c6c\u6c27\u5316\u7269\u534a\u5c0e\u9ad4\u5834\u6548\u96fb\u6676\u9ad4\uff09\u5df2\u6210\u70ba\u96fb\u6e90\u7ba1\u7406\u548c\u96fb\u6c60\u4fdd\u8b77\u96fb\u8def\u7684\u6838\u5fc3\u5143\u4ef6\u3002\u7136\u800c\uff0c\u8a31\u591a\u5de5\u7a0b\u5e2b\u5728\u9078\u578b\u6642\u5f80\u5f80\u53ea\u770b\u50f9\u683c\u6216\u76f2\u76ee\u8ddf\u98a8\uff0c\u5c0e\u81f4\u96fb\u8def\u6548\u7387\u4e0d\u8db3\u3001\u767c\u71b1\u904e\u91cf\uff0c\u751a\u81f3\u8a2d\u5099\u6545\u969c\u3002\u672c\u6307\u5357\u5c07\u5e36\u60a8\u7cfb\u7d71\u6027\u5730\u638c\u63e1 MOSFET \u9078\u578b\u7684\u6838\u5fc3\u539f\u5247\uff0c\u5e6b\u52a9\u60a8\u5728\u8a2d\u8a08\u968e\u6bb5\u5c31\u505a\u51fa\u6b63\u78ba\u6c7a\u7b56\u3002<\/p>\n\n<h2>\u70ba\u4ec0\u9ebc MOSFET \u9078\u578b\u5f88\u91cd\u8981\uff1f<\/h2>\n<p>MOSFET \u662f\u958b\u95dc\u5143\u4ef6\uff0c\u5b83\u6c7a\u5b9a\u4e86\u96fb\u8def\u7684\u958b\u95dc\u6548\u7387\u3001\u71b1\u7279\u6027\u548c\u53ef\u9760\u6027\u3002\u9078\u578b\u4e0d\u7576\u6703\u5e36\u4f86\u591a\u500b\u5c64\u9762\u7684\u554f\u984c\uff1a<\/p>\n\n<h3>\u6548\u7387\u554f\u984c<\/h3>\n<p>\u9078\u7528\u5c0e\u901a\u96fb\u963b\uff08RDS(on)\uff09\u904e\u9ad8\u7684 MOSFET\uff0c\u6703\u5c0e\u81f4\u5927\u91cf\u529f\u7387\u640d\u8017\u5728\u5143\u4ef6\u672c\u8eab\uff0c\u6700\u7d42\u9ad4\u73fe\u70ba\u767c\u71b1\u548c\u96fb\u80fd\u6d6a\u8cbb\u3002\u4f8b\u5982\u5728 5 A \u96fb\u6d41\u4e0b\uff0c\u5982\u679c RDS(on) \u9ad8 0.1 \u03a9\uff0c\u5c31\u6703\u591a\u6d88\u8017 2.5 W \u7684\u529f\u7387\u3002<\/p>\n\n<h3>\u71b1\u7ba1\u7406\u5931\u6557<\/h3>\n<p>\u4e0d\u5408\u7406\u7684\u9078\u578b\u5c0e\u81f4\u6f0f\u6975\u96fb\u6d41\u8d85\u904e\u984d\u5b9a\u503c\u6216\u7d50\u6eab\u8d85\u904e\u5b89\u5168\u7bc4\u570d\uff0c\u8f15\u5247\u52a0\u901f\u8001\u5316\uff0c\u91cd\u5247\u71d2\u6bc0\u3002\u5728\u7121\u6563\u71b1\u7247\u7684\u8a2d\u8a08\u4e2d\uff0c\u9019\u985e\u5931\u8aa4\u5f80\u5f80\u81f4\u547d\u3002<\/p>\n\n<h3>\u53ef\u9760\u6027\u4e0b\u964d<\/h3>\n<p>\u904e\u8f09\u5de5\u4f5c\u6703\u5c0e\u81f4\u9598\u6975\u96fb\u8377\u7d2f\u7a4d\u3001\u9ad4\u4e8c\u6975\u9ad4\u53cd\u5411\u6062\u5fa9\u5931\u6557\u7b49\u554f\u984c\uff0c\u589e\u52a0\u6545\u969c\u7387\u3002<\/p>\n\n<h3>\u6210\u672c\u6d6a\u8cbb<\/h3>\n<p>\u9078\u7528\u898f\u683c\u904e\u9ad8\u7684\u5143\u4ef6\u6703\u63a8\u9ad8 BOM \u6210\u672c\u537b\u4e0d\u63d0\u5347\u6027\u80fd\uff1b\u76f8\u53cd\uff0c\u9078\u7528\u904e\u4f4e\u5247\u9700\u984d\u5916\u6563\u71b1\u63aa\u65bd\uff0c\u53cd\u800c\u589e\u52a0\u7e3d\u6210\u672c\u3002<\/p>\n\n<p>\u6b63\u78ba\u7684 MOSFET \u9078\u578b\u4e0d\u50c5\u80fd\u78ba\u4fdd\u96fb\u8def\u5b89\u5168\u53ef\u9760\u904b\u884c\uff0c\u9084\u80fd\u512a\u5316\u6574\u9ad4\u6210\u672c\u548c\u71b1\u8a2d\u8a08\uff0c\u662f\u6bcf\u4f4d\u96fb\u6e90\u5de5\u7a0b\u5e2b\u5fc5\u9808\u638c\u63e1\u7684\u57fa\u672c\u529f\u3002<\/p>\n\n<h2>\u9078\u578b\u524d\u7684\u6e96\u5099\uff1a\u8cc7\u8a0a\u6e05\u55ae<\/h2>\n<p>\u5728\u958b\u59cb\u9078\u578b\u524d\uff0c\u8acb\u5148\u6536\u96c6\u548c\u78ba\u8a8d\u4ee5\u4e0b\u96fb\u8def\u53c3\u6578\uff1a<\/p>\n\n<table>\n<thead><tr><th>\u53c3\u6578<\/th><th>\u542b\u7fa9<\/th><th>\u7372\u53d6\u65b9\u5f0f<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u8f38\u5165\/\u8f38\u51fa\u96fb\u58d3\uff08Vin\/Vout\uff09<\/td><td>\u96fb\u8def\u5de5\u4f5c\u96fb\u58d3\u7bc4\u570d<\/td><td>\u7cfb\u7d71\u898f\u683c\u66f8\u6216\u539f\u7406\u5716<\/td><\/tr>\n<tr><td>\u6700\u5927\u8ca0\u8f09\u96fb\u6d41\uff08Iload\uff09<\/td><td>\u6301\u7e8c\u5de5\u4f5c\u6642\u7684\u6700\u5927\u96fb\u6d41<\/td><td>\u8ca0\u8f09\u8a2d\u5099\u898f\u683c\u6216\u96fb\u8def\u8a08\u7b97<\/td><\/tr>\n<tr><td>\u5cf0\u503c\u96fb\u6d41\uff08Ipeak\uff09<\/td><td>\u77ac\u9593\u6700\u5927\u96fb\u6d41<\/td><td>\u6545\u969c\u5206\u6790\u6216\u4fdd\u8b77\u96fb\u8def\u898f\u7bc4<\/td><\/tr>\n<tr><td>\u958b\u95dc\u983b\u7387\uff08Fsw\uff09<\/td><td>MOSFET \u7684\u5de5\u4f5c\u983b\u7387<\/td><td>\u62d3\u64b2\u8a2d\u8a08<\/td><\/tr>\n<tr><td>\u74b0\u5883\u6eab\u5ea6\uff08Ta\uff09<\/td><td>\u5de5\u4f5c\u74b0\u5883\u6eab\u5ea6\u7bc4\u570d<\/td><td>\u7522\u54c1\u898f\u7bc4\u6216\u73fe\u5834\u689d\u4ef6<\/td><\/tr>\n<tr><td>\u7d50\u6eab\u9650\u5236\uff08Tj\uff09<\/td><td>MOSFET \u5141\u8a31\u7684\u6700\u9ad8\u7d50\u6eab<\/td><td>\u901a\u5e38\u70ba 150\u00b0C \u6216 125\u00b0C<\/td><\/tr>\n<tr><td>\u6563\u71b1\u689d\u4ef6<\/td><td>PCB \u9285\u7b94\u9762\u7a4d\u3001\u6563\u71b1\u7247\u6709\u7121<\/td><td>PCB \u8a2d\u8a08\u6216\u6a5f\u68b0\u8a2d\u8a08\u6587\u4ef6<\/td><\/tr>\n<tr><td>\u9a45\u52d5\u96fb\u58d3\uff08Vgate\uff09<\/td><td>\u9598\u6975\u9a45\u52d5\u96fb\u58d3<\/td><td>\u9a45\u52d5\u96fb\u8def\u8a2d\u8a08\u6216\u7cfb\u7d71\u8981\u6c42<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n<h2>\u6838\u5fc3\u9078\u578b\u53c3\u6578\u8a73\u89e3<\/h2>\n\n<h3>1. VDS\uff08\u6c72\u6e90\u6975\u8010\u58d3\uff09<\/h3>\n<p>VDS \u662f MOSFET \u80fd\u5920\u9577\u671f\u627f\u53d7\u7684\u6700\u5927\u6f0f\u6975\u8207\u6e90\u6975\u4e4b\u9593\u7684\u96fb\u58d3\uff0c\u4e5f\u662f\u9078\u578b\u7684\u9996\u8981\u53c3\u6578\u3002\u8d85\u904e VDS \u984d\u5b9a\u503c\u6703\u5c0e\u81f4\u96ea\u5d29\u64ca\u7a7f\uff0c\u5143\u4ef6\u7121\u6cd5\u6062\u5fa9\u3002\u8003\u616e\u5230\u96fb\u6e90\u8f38\u5165\u6ce2\u52d5\u3001\u6d6a\u6e67\u548c\u53cd\u5c04\uff0c\u5be6\u969b\u5de5\u4f5c\u96fb\u58d3\u5f80\u5f80\u9ad8\u65bc\u540d\u7fa9\u503c\u3002<\/p>\n<p>\u5047\u8a2d\u7cfb\u7d71\u984d\u5b9a\u96fb\u58d3\u70ba Vnom\uff0c\u61c9\u9078\u64c7 VDS \u2265 Vnom \u00d7 1.25\uff08\u7559\u51fa 25% \u4f59\u91cf\uff09\u3002\u4f8b\u5982 5V \u7cfb\u7d71\u9078 10V \u6216 20V \u7b49\u7d1a\u300112V \u7cfb\u7d71\u9078 20V \u6216 30V \u7b49\u7d1a\u300124V \u7cfb\u7d71\u9078 40V \u6216 60V \u7b49\u7d1a\u3002<\/p>\n\n<h3>2. RDS(on)\uff08\u5c0e\u901a\u96fb\u963b\uff09<\/h3>\n<p>RDS(on) \u76f4\u63a5\u6c7a\u5b9a\u4e86\u5c0e\u901a\u640d\u8017\u3002\u529f\u7387\u640d\u8017 P = I\u00b2 \u00d7 RDS(on)\uff0c\u5c0e\u901a\u640d\u8017\u6703\u8f49\u5316\u70ba\u71b1\u3002\u5728\u9ad8\u96fb\u6d41\u61c9\u7528\u4e2d\uff0cRDS(on) \u6bcf\u964d\u4f4e 0.01 \u03a9 \u90fd\u80fd\u986f\u8457\u964d\u4f4e\u71b1\u8ca0\u8377\u3002<\/p>\n<p><strong>\u6ce8\u610f\u4e8b\u9805\uff1a<\/strong>RDS(on) \u6703\u96a8\u6eab\u5ea6\u4e0a\u5347\u800c\u589e\u52a0\uff08\u901a\u5e38\u6eab\u5ea6\u4fc2\u6578 0.4%~0.6% per \u00b0C\uff09\u3002Datasheet \u4e0a\u6a19\u8a3b\u7684\u503c\u901a\u5e38\u662f\u5728 Tj = 25\u00b0C\u3001Vgs = 10V \u6642\u6e2c\u5b9a\u3002\u5be6\u969b\u5de5\u4f5c\u689d\u4ef6\u4e0b\u7684 RDS(on) \u6703\u9ad8\u65bc datasheet \u503c\uff0c\u9700\u9810\u7559\u4f59\u91cf\u3002<\/p>\n\n<h3>3. ID\uff08\u9023\u7e8c\u6f0f\u6975\u96fb\u6d41\uff09<\/h3>\n<p>ID \u5b9a\u7fa9\u4e86\u5143\u4ef6\u7684\u6700\u5927\u96fb\u6d41\u5bb9\u91cf\uff0c\u8d85\u904e ID \u6703\u5c0e\u81f4\u7d50\u6eab\u904e\u9ad8\uff0c\u52a0\u901f\u5668\u4ef6\u8001\u5316\u6216\u7a81\u7136\u5931\u6548\u3002\u8ca0\u8f09\u96fb\u6d41 Iload \u61c9\u8207\u984d\u5b9a\u503c\u6709\u5b89\u5168\u88d5\u5ea6\uff1aIload \u2264 ID \u00d7 0.7~0.8\u3002\u4f8b\u5982 5A \u7684\u8ca0\u8f09\u61c9\u9078 ID \u2265 6.25~7A \u7684 MOSFET\u3002<\/p>\n\n<h3>4. VGS(th)\uff08\u9598\u6975\u81e8\u754c\u96fb\u58d3\uff09<\/h3>\n<p>VGS(th) \u6c7a\u5b9a\u4e86\u9a45\u52d5\u96fb\u8def\u7684\u8a2d\u8a08\u96e3\u5ea6\u3002\u908f\u8f2f\u7d1a MOSFET \u7684 VGS(th) \u70ba 1.5~3V\uff0c\u53ef\u76f4\u63a5\u7531 GPIO \u6216\u5fae\u63a7\u5236\u5668\u9a45\u52d5\uff1b\u6a19\u6e96\u7d1a\u70ba 2~4V\uff0c\u9700 5V \u6216 12V \u9a45\u52d5\u96fb\u6e90\uff1b\u9ad8\u58d3 MOSFET \u70ba 3~5V\uff0c\u901a\u5e38\u9700\u5c08\u7528\u9a45\u52d5 IC\u3002<\/p>\n\n<h3>5. Qg\uff08\u7e3d\u9598\u6975\u96fb\u8377\uff09<\/h3>\n<p>Qg \u5f71\u97ff\u958b\u95dc\u901f\u5ea6\u548c\u9a45\u52d5\u96fb\u8def\u7684\u8a2d\u8a08\u3002Qg \u8d8a\u5927\uff0c\u9a45\u52d5\u6642\u9593\u8d8a\u9577\uff0c\u640d\u8017\u8d8a\u9ad8\u3002Qg < 10nC \u9069\u5408\u9ad8\u983b\u61c9\u7528\uff08>1 MHz\uff09\uff1b10~50nC \u9069\u5408\u666e\u901a\u6d88\u8cbb\u96fb\u5b50\uff08100 kHz~500 kHz\uff09\uff1b> 50nC \u9069\u5408\u4f4e\u983b\u61c9\u7528\u6216\u9ad8\u529f\u7387\u5834\u666f\u3002<\/p>\n\n<h3>6. SOA\uff08\u5b89\u5168\u5de5\u4f5c\u5340\uff09<\/h3>\n<p>SOA \u5716\u8868\u986f\u793a\u4e86\u5728\u4e0d\u640d\u50b7 MOSFET \u524d\u63d0\u4e0b\uff0c\u96fb\u6d41\u548c\u96fb\u58d3\u53ef\u4ee5\u540c\u6642\u65bd\u52a0\u7684\u5340\u57df\u3002\u5728\u8a2d\u8a08\u96fb\u6e90\u6642\uff0c\u61c9\u7e6a\u88fd\u9810\u671f\u7684 I-V \u5de5\u4f5c\u8ecc\u8de1\uff0c\u78ba\u4fdd\u5b83\u5b8c\u5168\u843d\u5728 datasheet \u7684 SOA \u5167\u3002\u9019\u5c0d\u9ad8\u529f\u7387\u8a2d\u8a08\u5c24\u5176\u91cd\u8981\u3002<\/p>\n\n<h2>MOSFET \u9078\u578b\u6d41\u7a0b\uff08Step by Step\uff09<\/h2>\n\n<h3>\u6b65\u9a5f\u4e00\uff1a\u78ba\u5b9a\u5de5\u4f5c\u689d\u4ef6<\/h3>\n<p>\u9996\u5148\u78ba\u8a8d\u7cfb\u7d71\u5de5\u4f5c\u96fb\u58d3\u3001\u6700\u5927\u8ca0\u8f09\u96fb\u6d41\u3001\u5de5\u4f5c\u983b\u7387\u3001\u74b0\u5883\u6eab\u5ea6\u548c\u6563\u71b1\u689d\u4ef6\u7b49\u57fa\u672c\u53c3\u6578\u3002<\/p>\n\n<h3>\u6b65\u9a5f\u4e8c\uff1a\u521d\u6b65\u78ba\u5b9a VDS \u7b49\u7d1a<\/h3>\n<table>\n<thead><tr><th>\u7cfb\u7d71\u96fb\u58d3<\/th><th>\u63a8\u85a6 VDS<\/th><th>\u5099\u8a3b<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>3.3 V<\/td><td>10~20 V<\/td><td>\u6d88\u8cbb\u96fb\u5b50\uff0c\u9918\u91cf\u5145\u8db3<\/td><\/tr>\n<tr><td>5 V<\/td><td>10~20 V<\/td><td>USB \u61c9\u7528\uff0c\u8003\u616e\u6d6a\u6e67<\/td><\/tr>\n<tr><td>12 V<\/td><td>20~30 V<\/td><td>\u5de5\u696d\u61c9\u7528\uff0c\u9700\u9810\u7559\u7a81\u6ce2<\/td><\/tr>\n<tr><td>24 V<\/td><td>40~60 V<\/td><td>\u5de5\u696d\u63a7\u5236\uff0c\u5b89\u5168\u88d5\u5ea6\u5927<\/td><\/tr>\n<tr><td>48 V+<\/td><td>100 V+<\/td><td>\u65b0\u80fd\u6e90\u3001\u9ad8\u58d3\u61c9\u7528<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n<h3>\u6b65\u9a5f\u4e09\uff1a\u6839\u64da\u96fb\u6d41\u548c\u71b1\u8a2d\u8a08\u9078\u64c7 ID \u548c RDS(on)<\/h3>\n<p>ID \u9078\u64c7\uff1aID \u2265 Iload \/ 0.7~0.8\u3002RDS(on) \u9078\u64c7\uff1a\u6839\u64da\u6563\u71b1\u80fd\u529b\u8a08\u7b97\u5141\u8a31\u7684\u5c0e\u901a\u640d\u8017\u3002\u5728\u76f8\u540c VDS \u7b49\u7d1a\u4e0b\uff0cRDS(on) \u8d8a\u4f4e\u8d8a\u597d\uff0c\u4f46\u6210\u672c\u4e5f\u8d8a\u9ad8\uff0c\u901a\u5e38\u9700\u5728\u6210\u672c\u8207\u6548\u7387\u9593\u5e73\u8861\u3002<\/p>\n\n<h3>\u6b65\u9a5f\u56db\uff1a\u6aa2\u67e5\u9a45\u52d5\u76f8\u5bb9\u6027<\/h3>\n<p>\u78ba\u8a8d\u9a45\u52d5\u96fb\u8def\u80fd\u5426\u6eff\u8db3 VGS(th) \u8981\u6c42\uff0c\u4e26\u6aa2\u67e5 Qg \u8207\u9a45\u52d5\u80fd\u529b\u7684\u5339\u914d\u3002\u9a45\u52d5\u6642\u9593\u61c9\u63a7\u5236\u5728\u80fd\u63a5\u53d7\u7684\u7bc4\u570d\u5167\uff08\u901a\u5e38 < 100 ns\uff09\u3002<\/p>\n\n<h3>\u6b65\u9a5f\u4e94\uff1a\u9a57\u8b49\u958b\u95dc\u640d\u8017\u548c SOA<\/h3>\n<p>\u9ad8\u983b\u61c9\u7528\u9700\u8003\u616e\u958b\u95dc\u640d\u8017\u3002\u8a08\u7b97\u7e3d\u640d\u8017 = \u5c0e\u901a\u640d\u8017 + \u958b\u95dc\u640d\u8017 + \u9a45\u52d5\u640d\u8017\uff0c\u78ba\u4fdd\u4e0d\u8d85\u904e\u71b1\u8a2d\u8a08\u5141\u8a31\u503c\u3002\u6aa2\u67e5\u5de5\u4f5c\u9ede\u662f\u5426\u843d\u5728 SOA \u5167\u3002<\/p>\n\n<h3>\u6b65\u9a5f\u516d\uff1a\u9078\u64c7\u5c01\u88dd\u548c\u9a57\u8b49 PCB \u53ef\u884c\u6027<\/h3>\n<table>\n<thead><tr><th>\u5c01\u88dd<\/th><th>\u5178\u578b\u61c9\u7528<\/th><th>\u5099\u8a3b<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>TO-220<\/td><td>\u4e2d\u529f\u7387\uff08<50 W\uff09<\/td><td>\u9700\u6563\u71b1\u7247\uff0c\u5f15\u8173\u4fbf\u65bc\u710a\u63a5<\/td><\/tr>\n<tr><td>DPAK<\/td><td>\u4e2d\u529f\u7387\uff0820~100 W\uff09<\/td><td>\u8f03\u5c0f PCB \u9762\u7a4d<\/td><\/tr>\n<tr><td>SO-8 \/ SOIC-8<\/td><td>\u4f4e\u529f\u7387\uff08<5 W\uff09<\/td><td>\u7a7a\u9593\u53d7\u9650\uff0c\u7121\u6563\u71b1\u80fd\u529b<\/td><\/tr>\n<tr><td>PowerPAK<\/td><td>\u4e2d\u9ad8\u529f\u7387\uff08>50 W\uff09<\/td><td>\u6563\u71b1\u826f\u597d<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n<h2>\u61c9\u7528\u5834\u666f\u9078\u578b\u7bc4\u4f8b<\/h2>\n\n<h3>\u7bc4\u4f8b\u4e00\uff1a5V\/3A USB \u5145\u96fb\u5668 Buck \u8f49\u63db\u5668<\/h3>\n<p>USB \u5145\u96fb\u5668\u8f38\u5165 5V\uff0c\u8f38\u51fa 5V\/3A\uff0c\u63a1\u7528 buck \u8f49\u63db\u5668\u62d3\u64b2\uff0c\u958b\u95dc\u983b\u7387 500 kHz\u3002\u9078\u578b\u8981\u9ede\uff1aVDS \u9078 10V \u7b49\u7d1a\u3001ID \u2265 4A\u3001RDS(on) \u2264 0.056\u03a9\u3001VGS(th) 2~3V \u6a19\u6e96\u7d1a\u3001Qg < 30nC\u3002\u63a8\u85a6\u5c01\u88dd SO-8\uff0c\u914d\u5408 PCB \u9285\u7b94\u6563\u71b1\u3002<\/p>\n\n<h3>\u7bc4\u4f8b\u4e8c\uff1a12V \u96fb\u6c60\u4fdd\u8b77\u96fb\u8def\uff08BMS\uff09<\/h3>\n<p>4S \u92f0\u96fb\u6c60\u7d44\u9700\u8981\u904e\u96fb\u6d41\u548c\u904e\u6eab\u4fdd\u8b77\u3002\u9078\u578b\u8981\u9ede\uff1aVDS \u9078 30V \u7b49\u7d1a\u3001ID \u2265 30A\u3001RDS(on) \u2264 0.005\u03a9\u3001\u9700\u9ad8\u6027\u80fd\u578b\u865f\u3002\u63a8\u85a6\u5c01\u88dd DPAK \u6216 TO-220\uff0c\u5fc5\u9808\u914d\u7f6e\u6563\u71b1\u8a2d\u8a08\u3002<\/p>\n\n<h3>\u7bc4\u4f8b\u4e09\uff1a24V \u99ac\u9054\u9a45\u52d5 H \u6a4b<\/h3>\n<p>\u5de5\u696d\u63a7\u5236\u7528 24V \u76f4\u6d41\u99ac\u9054\uff0cH \u6a4b\u9a45\u52d5\u6b63\u53cd\u8f49\u63a7\u5236\u3002\u9078\u578b\u8981\u9ede\uff1aVDS \u9078 40V \u6216 60V \u7b49\u7d1a\u3001ID \u2265 15A\u3001RDS(on) 0.05~0.08\u03a9\u3002\u63a8\u85a6\u5c01\u88dd TO-220 \u6216 DPAK\uff0c\u5fc5\u9808\u914d\u7f6e\u5c08\u696d\u6563\u71b1\u7247\u3002<\/p>\n\n<h2>\u5e38\u898b\u7684 MOSFET \u9078\u578b\u932f\u8aa4<\/h2>\n\n<h3>\u932f\u8aa4\u4e00\uff1a\u53ea\u770b VDS\uff0c\u5ffd\u8996\u5be6\u969b\u5de5\u4f5c\u96fb\u58d3\u88d5\u5ea6<\/h3>\n<p>\u9078\u64c7 VDS \u8207\u7cfb\u7d71\u984d\u5b9a\u96fb\u58d3\u76f8\u8fd1\u662f\u5f88\u5e38\u898b\u7684\u932f\u8aa4\u3002\u6d6a\u6e67\u96fb\u58d3\u6703\u5c0e\u81f4 VDS \u77ac\u9593\u8d85\u6a19\uff0c\u9577\u671f\u53ef\u9760\u6027\u4e0b\u964d\u3002\u6b63\u78ba\u505a\u6cd5\u662f\u59cb\u7d42\u9810\u7559 20~30% \u7684 VDS \u4f59\u91cf\u3002<\/p>\n\n<h3>\u932f\u8aa4\u4e8c\uff1a\u5c0e\u901a\u96fb\u963b\u8a08\u7b97\u6642\u672a\u8003\u616e\u6eab\u5ea6\u4fc2\u6578<\/h3>\n<p>\u6839\u64da\u5ba4\u6eab datasheet \u76f4\u63a5\u9078\u64c7 RDS(on) \u800c\u4e0d\u8003\u616e\u5be6\u969b\u5de5\u4f5c\u6eab\u5ea6\uff0c\u6703\u5c0e\u81f4\u984d\u5916\u7684\u71b1\u640d\u8017\u548c\u6b63\u53cd\u994b\u6548\u61c9\u3002\u9078\u64c7\u6642\u61c9\u9810\u4f30\u5be6\u969b\u5de5\u4f5c\u6eab\u5ea6\u4e0b\u7684 RDS(on)\uff0c\u4e26\u7559\u51fa 30~50% \u7684\u88d5\u5ea6\u3002<\/p>\n\n<h3>\u932f\u8aa4\u4e09\uff1a\u9ad8\u4f30 ID\uff0c\u4f4e\u4f30\u5cf0\u503c\u96fb\u6d41\u7684\u5f71\u97ff<\/h3>\n<p>\u672a\u8003\u616e\u77ac\u9593\u904e\u8f09\uff08\u5982\u555f\u52d5\u3001\u6545\u969c\u77ed\u8def\uff09\u6703\u5c0e\u81f4\u7d50\u6eab\u77ac\u9593\u4e0a\u5347\u3002\u6b63\u78ba\u505a\u6cd5\u662f\u5340\u5206\u6301\u7e8c\u96fb\u6d41\u548c\u77ac\u9593\u96fb\u6d41\uff0c\u6301\u7e8c\u96fb\u6d41\u6309 70~80% \u5229\u7528\u7387\u9078\u64c7\uff0c\u4e26\u914d\u7f6e\u904e\u6d41\u4fdd\u8b77\u96fb\u8def\u3002<\/p>\n\n<h3>\u932f\u8aa4\u56db\uff1a\u5ffd\u8996\u9a45\u52d5\u80fd\u529b\u548c Qg \u7684\u5339\u914d<\/h3>\n<p>\u9078\u64c7\u9ad8\u6027\u80fd MOSFET\uff08Qg \u5f88\u5927\uff09\u4f46\u9a45\u52d5\u96fb\u6d41\u4e0d\u8db3\uff0c\u6703\u5ef6\u9577\u958b\u95dc\u6642\u9593\u3001\u589e\u52a0\u958b\u95dc\u640d\u8017\u3002\u61c9\u6839\u64da\u5be6\u969b\u9a45\u52d5\u80fd\u529b\u9078\u64c7 Qg \u5408\u9069\u7684\u578b\u865f\uff0c\u4e26\u8a55\u4f30\u9a45\u52d5\u640d\u8017\u4e0d\u8d85\u904e\u7e3d\u640d\u8017\u7684 10%\u3002<\/p>\n\n<h2>\u5167\u90e8\u9023\u7d50\u8207\u6280\u8853\u652f\u63f4<\/h2>\n<p>\u6211\u5011\u7684 <a href=\"https:\/\/shen-jia.com.tw\/mosfet\/\">MOSFET \u7522\u54c1\u9801\u9762<\/a> \u63d0\u4f9b\u4e86\u8c50\u5bcc\u7684\u578b\u865f\u9078\u64c7\u548c\u6280\u8853\u898f\u683c\u3002\u5982\u679c\u60a8\u5728\u9078\u578b\u904e\u7a0b\u4e2d\u9047\u5230\u56f0\u96e3\uff0c\u6216\u9700\u8981\u91dd\u5c0d\u7279\u5b9a\u61c9\u7528\u5834\u666f\u7684\u8aee\u8a62\uff0c\u627f\u5609\u79d1\u6280\u63d0\u4f9b\u514d\u8cbb\u7684\u9078\u578b\u6307\u5c0e\u670d\u52d9\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u6211\u5011\u4e5f\u63d0\u4f9b\u6a23\u54c1\u6e2c\u8a66\u548c\u5c0f\u6279\u91cf\u8a66\u7528\uff0c\u5e6b\u52a9\u60a8\u5728\u8a2d\u8a08\u968e\u6bb5\u9a57\u8b49\u65b9\u6848\u7684\u53ef\u884c\u6027\u3002<\/p>\n\n<div style=\"background:#f0f7ff;border-left:4px solid #1e73be;padding:20px;margin:30px 0;\">\n  <h3 style=\"margin-top:0;\">\u9700\u8981\u9078\u578b\u5354\u52a9\uff1f<\/h3>\n  <p>\u627f\u5609\u79d1\u6280\u63d0\u4f9b\u514d\u8cbb\u7684\u96fb\u8def\u4fdd\u8b77\u5143\u4ef6\u9078\u578b\u8aee\u8a62\u670d\u52d9\u3002\u7121\u8ad6\u60a8\u662f\u5728\u8a55\u4f30\u65b9\u6848\u9084\u662f\u9700\u8981\u6280\u8853\u652f\u63f4\uff0c\u6211\u5011\u7684\u5c08\u696d\u5718\u968a\u90fd\u80fd\u5354\u52a9\u60a8\u627e\u5230\u6700\u5408\u9069\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n  <p><a href=\"https:\/\/shen-jia.com.tw\/%e8%81%af%e7%b5%a1%e6%88%91\/\" style=\"background:#1e73be;color:#fff;padding:10px 24px;text-decoration:none;border-radius:4px;display:inline-block;\">\u7acb\u5373\u806f\u7d61\u6211\u5011<\/a><\/p>\n<\/div>\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"MOSFET \u9078\u578b\u6642\u6700\u91cd\u8981\u7684\u53c3\u6578\u662f\u4ec0\u9ebc\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"MOSFET \u9078\u578b\u6700\u91cd\u8981\u7684\u53c3\u6578\u5305\u62ec VDS\uff08\u6c72\u6e90\u6975\u8010\u58d3\uff09\u3001RDS(on)\uff08\u5c0e\u901a\u96fb\u963b\uff09\u3001ID\uff08\u9023\u7e8c\u6f0f\u6975\u96fb\u6d41\uff09\u3001VGS(th)\uff08\u9598\u6975\u81e8\u754c\u96fb\u58d3\uff09\u548c Qg\uff08\u7e3d\u9598\u6975\u96fb\u8377\uff09\u3002\u5176\u4e2d VDS \u662f\u9996\u8981\u53c3\u6578\uff0c\u61c9\u9810\u7559 20~30% \u7684\u5b89\u5168\u88d5\u5ea6\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"RDS(on) \u70ba\u4ec0\u9ebc\u6703\u96a8\u6eab\u5ea6\u5347\u9ad8\u800c\u589e\u52a0\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"RDS(on) \u7684\u6eab\u5ea6\u4fc2\u6578\u901a\u5e38\u70ba 0.4%~0.6% per \u00b0C\u3002\u7576\u7d50\u6eab\u5347\u9ad8 50\u00b0C \u6642\uff0cRDS(on) \u6703\u589e\u52a0\u7d04 20~30%\u3002\u9019\u662f\u56e0\u70ba\u6eab\u5ea6\u5347\u9ad8\u6703\u964d\u4f4e\u8f09\u5b50\u9077\u79fb\u7387\uff0c\u589e\u52a0\u901a\u9053\u96fb\u963b\u3002\u9078\u578b\u6642\u61c9\u9810\u4f30\u5be6\u969b\u5de5\u4f5c\u6eab\u5ea6\u4e0b\u7684 RDS(on)\uff0c\u4e26\u7559\u51fa 30~50% \u7684\u88d5\u5ea6\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u908f\u8f2f\u7d1a MOSFET \u548c\u6a19\u6e96\u7d1a MOSFET \u6709\u4ec0\u9ebc\u5340\u5225\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u908f\u8f2f\u7d1a MOSFET \u7684 VGS(th) \u70ba 1.5~3V\uff0c\u53ef\u76f4\u63a5\u7531 3.3V GPIO \u6216\u5fae\u63a7\u5236\u5668\u9a45\u52d5\u3002\u6a19\u6e96\u7d1a MOSFET \u7684 VGS(th) \u70ba 2~4V\uff0c\u9700\u8981 5V \u6216 12V \u9a45\u52d5\u96fb\u6e90\u3002\u9078\u64c7\u6642\u9700\u6839\u64da\u9a45\u52d5\u96fb\u8def\u7684\u8f38\u51fa\u96fb\u58d3\u4f86\u6c7a\u5b9a\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u5982\u4f55\u8a08\u7b97 MOSFET \u7684\u5c0e\u901a\u640d\u8017\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"MOSFET \u5c0e\u901a\u640d\u8017\u516c\u5f0f\u70ba P = I\u00b2 \u00d7 RDS(on)\uff0c\u5176\u4e2d I \u70ba\u8ca0\u8f09\u96fb\u6d41\u3002\u4f8b\u5982\u5728 5A \u96fb\u6d41\u4e0b\uff0cRDS(on) \u70ba 0.04\u03a9\uff0c\u5c0e\u901a\u640d\u8017\u70ba 5\u00b2 \u00d7 0.04 = 1W\u3002\u9700\u6ce8\u610f RDS(on) \u6703\u96a8\u6eab\u5ea6\u5347\u9ad8\u800c\u589e\u52a0\uff0c\u5be6\u969b\u640d\u8017\u6703\u6bd4\u5ba4\u6eab\u8a08\u7b97\u503c\u66f4\u9ad8\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"MOSFET \u7684 SOA \u5b89\u5168\u5de5\u4f5c\u5340\u662f\u4ec0\u9ebc\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"SOA\uff08Safe Operating Area\uff09\u662f\u5728\u4e0d\u640d\u50b7 MOSFET 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