{"id":971,"date":"2026-04-23T11:28:18","date_gmt":"2026-04-23T03:28:18","guid":{"rendered":"https:\/\/shen-jia.com.tw\/?p=971"},"modified":"2026-04-23T11:28:50","modified_gmt":"2026-04-23T03:28:50","slug":"led-driver-circuit-protection","status":"publish","type":"post","link":"https:\/\/shen-jia.com.tw\/en\/led-driver-circuit-protection\/","title":{"rendered":"LED Driver Circuit Protection Design: How to Choose the Right MOV and PPTC"},"content":{"rendered":"<p>LED \u9a45\u52d5\u96fb\u8def\u5728\u73fe\u4ee3\u7167\u660e\u7cfb\u7d71\u4e2d\u626e\u6f14\u95dc\u9375\u89d2\u8272\uff0c\u7121\u8ad6\u662f\u6236\u5916\u8def\u71c8\u3001\u5ba4\u5167\u5546\u7528\u7167\u660e\u9084\u662f\u5de5\u696d\u5ee0\u623f\u7684\u65e5\u7167\u88dc\u511f\u7cfb\u7d71\uff0cLED \u9a45\u52d5\u5668\u90fd\u9700\u8981\u5728\u60e1\u52a3\u7684\u96fb\u6c23\u74b0\u5883\u4e2d\u7a69\u5b9a\u904b\u4f5c\u3002\u7136\u800c\uff0c\u9019\u985e\u61c9\u7528\u9762\u81e8\u7684\u96fb\u6c23\u98a8\u96aa\u5f80\u5f80\u88ab\u5ffd\u8996\uff0c\u7279\u5225\u662f\u5728\u96fb\u6e90\u54c1\u8cea\u4e0d\u7a69\u5b9a\u7684\u5730\u5340\u3002<\/p>\n\n<h2>LED \u9a45\u52d5\u96fb\u8def\u9762\u81e8\u7684\u96fb\u6c23\u98a8\u96aa<\/h2>\n<p>\u6236\u5916\u74b0\u5883\u7684\u4e3b\u8981\u98a8\u96aa\u6e90\u5305\u62ec\uff1a<\/p>\n<p><strong>\u96fb\u6e90\u7a81\u6ce2\uff08Surge\uff09<\/strong>\uff1a\u96f7\u64ca\u9593\u63a5\u8026\u5408\u3001\u96fb\u7db2\u5207\u63db\u6216\u9130\u8fd1\u7528\u6236\u7684\u5927\u529f\u7387\u8a2d\u5099\u555f\u52d5\u90fd\u6703\u5728\u96fb\u6e90\u7dda\u4e0a\u7522\u751f\u77ac\u9593\u9ad8\u96fb\u58d3\uff0c\u53ef\u80fd\u9054\u5230 1000 V \u4ee5\u4e0a\u3002<\/p>\n<p><strong>\u96fb\u6d41\u6d6a\u6e67\uff08Inrush Current\uff09<\/strong>\uff1aLED \u9a45\u52d5\u5668\u555f\u52d5\u77ac\u9593\u3001\u8ca0\u8f09\u6295\u5165\u6642\u7522\u751f\u7684\u77ac\u9593\u904e\u96fb\u6d41\uff0c\u53ef\u9054\u984d\u5b9a\u96fb\u6d41\u7684 3\uff5e5 \u500d\u3002<\/p>\n<p><strong>LED \u4e32\u806f\u904e\u8f09<\/strong>\uff1aLED \u5149\u6e90\u6545\u969c\u77ed\u8def\u6216\u9a45\u52d5\u5668\u7570\u5e38\u6642\uff0cLED \u4e32\u7684\u904e\u96fb\u6d41\u6703\u8fc5\u901f\u9020\u6210\u5927\u91cf\u5149\u8870\u3001\u82af\u7247\u71d2\u640d\uff0c\u751a\u81f3\u706b\u707d\u96b1\u60a3\u3002<\/p>\n<p><strong>\u6eab\u5ea6\u6f02\u79fb<\/strong>\uff1a\u5728\u9ad8\u6eab\u74b0\u5883\u4e0b\uff0c\u9a45\u52d5\u5668\u6548\u7387\u964d\u4f4e\u5c0e\u81f4\u5167\u90e8\u6eab\u5347\uff0c\u5f15\u767c\u9023\u9396\u6545\u969c\u3002<\/p>\n<p>\u50b3\u7d71\u7684\u96fb\u8def\u4fdd\u8b77\u65b9\u6848\uff08\u4f8b\u5982\u55ae\u7d14\u4f7f\u7528\u73bb\u7483\u4fdd\u96aa\u7d72\uff09\u5b58\u5728\u660e\u986f\u7f3a\u9677\uff1a\u4fdd\u96aa\u7d72\u4e00\u65e6\u7194\u65b7\u5c31\u7121\u6cd5\u6062\u5fa9\uff0c\u7dad\u4fee\u6210\u672c\u9ad8\u4e14\u7121\u6cd5\u9069\u61c9\u77ac\u9593\u6d6a\u6e67\u7684\u591a\u6b21\u885d\u64ca\u3002<\/p>\n\n<h2>\u4fdd\u8b77\u9700\u6c42\u5206\u6790\uff1a\u4e09\u500b\u5c64\u7d1a<\/h2>\n\n<h3>\u5c64\u7d1a\u4e00\uff1aAC \u8f38\u5165\u7aef\u7a81\u6ce2\u4fdd\u8b77<\/h3>\n<p>\u4fdd\u8b77\u9a45\u52d5\u5668\u7684 AC \u96fb\u6e90\u8f38\u5165\u7aef\uff08\u901a\u5e38\u662f AC 110\uff5e240 V\uff09\u3002\u98a8\u96aa\u985e\u578b\u70ba\u96fb\u6e90\u7dda\u4e0a\u7684\u77ac\u9593\u9ad8\u96fb\u58d3\uff08IEC 61000-4-5 \u6a19\u6e96\u5b9a\u7fa9\u7684 1.2\/50 \u00b5s \u6ce2\u5f62\uff0c\u5cf0\u503c\u53ef\u9054 1 kV\uff5e4 kV\uff09\u3002\u9632\u8b77\u76ee\u6a19\u662f\u5728\u6beb\u79d2\u7d1a\u5167\u5438\u6536\u904e\u96fb\u58d3\u80fd\u91cf\uff0c\u5c07\u5371\u96aa\u7684\u9ad8\u96fb\u58d3\u9257\u5236\u5728\u5b89\u5168\u7bc4\u570d\u5167\u3002<\/p>\n\n<h3>\u5c64\u7d1a\u4e8c\uff1aLED \u4e32\u904e\u96fb\u6d41\u4fdd\u8b77<\/h3>\n<p>\u4fdd\u8b77\u9a45\u52d5\u5668\u8f38\u51fa\u7aef\u8207 LED \u5149\u6e90\u4e32\u806f\u7684\u4f4d\u7f6e\u3002\u7576\u9a45\u52d5\u5668\u6545\u969c\u6216 LED \u5149\u6e90\u52a3\u5316\uff08\u55ae\u9846 LED \u5931\u6548\u77ed\u8def\uff09\u5c0e\u81f4\u904e\u96fb\u6d41\u6642\uff0c\u9700\u5728\u6beb\u79d2\u7d1a\u5167\u5207\u65b7\u904e\u96fb\u6d41\u8def\u5f91\uff0c\u9632\u6b62\u9023\u9396\u640d\u50b7\u3002<\/p>\n\n<h3>\u5c64\u7d1a\u4e09\uff1a\u6eab\u5ea6\u904e\u8f09\u4fdd\u8b77<\/h3>\n<p>\u4fdd\u8b77\u9a45\u52d5\u5668\u5167\u90e8\u529f\u7387\u7ba1\u548c\u78c1\u6027\u5143\u4ef6\u3002\u7576\u6301\u7e8c\u904e\u8f09\u6216\u74b0\u5883\u6eab\u5ea6\u904e\u9ad8\u5c0e\u81f4\u7684\u5167\u90e8\u6eab\u5347\u8d85\u904e\u5b89\u5168\u81e8\u754c\u503c\u6642\uff0c\u81ea\u52d5\u8abf\u7bc0\u6216\u65b7\u958b\u9a45\u52d5\uff0c\u9632\u6b62\u69cb\u6210\u706b\u707d\u96b1\u60a3\u3002<\/p>\n\n<h2>\u4fdd\u8b77\u65b9\u6848\u8a2d\u8a08\uff1aMOV + PPTC \u96d9\u91cd\u9632\u8b77<\/h2>\n\n<h3>\u70ba\u4ec0\u9ebc\u9078\u64c7 MOV + PPTC \u7684\u7d44\u5408\uff1f<\/h3>\n<p><strong><a href=\"https:\/\/shen-jia.com.tw\/mov-2\/\">MOV<\/a> \u8655\u7406\u9ad8\u96fb\u58d3\u77ac\u9593\u7a81\u6ce2<\/strong>\uff1aMOV \u7684\u53cd\u61c9\u901f\u5ea6\u6975\u5feb\uff08< 1 ns\uff09\uff0c\u80fd\u5728\u6beb\u79d2\u7d1a\u5167\u5438\u6536\u7a81\u6ce2\u80fd\u91cf\uff0c\u9632\u6b62\u9a45\u52d5\u5668\u5f8c\u7d1a\u96fb\u8def\u88ab\u9ad8\u96fb\u58d3\u64ca\u7a7f\u3002<\/p>\n<p><strong><a href=\"https:\/\/shen-jia.com.tw\/pptc-2\/\">PPTC<\/a> \u8655\u7406\u6301\u7e8c\u904e\u96fb\u6d41<\/strong>\uff1aPPTC \u662f\u300c\u81ea\u6062\u5fa9\u4fdd\u96aa\u7d72\u300d\uff0c\u7576\u904e\u96fb\u6d41\u51fa\u73fe\u6642\u6703\u81ea\u52d5\u63d0\u9ad8\u96fb\u963b\u9650\u5236\u96fb\u6d41\uff1b\u6545\u969c\u6392\u9664\u5f8c\u81ea\u52d5\u6062\u5fa9\u6b63\u5e38\u5de5\u4f5c\uff0c\u7121\u9700\u4eba\u5de5\u66f4\u63db\u3002<\/p>\n<p><strong>\u6210\u672c\u6548\u76ca\u512a\u52e2<\/strong>\uff1a\u76f8\u6bd4\u5149\u8026\u9694\u96e2\u65b9\u6848\u6216\u5c08\u7528\u82af\u7247\u7d1a\u4fdd\u8b77\uff0cMOV + PPTC \u7684\u6210\u672c\u4f4e\u5ec9\uff0c\u6613\u65bc\u6574\u5408\uff0c\u7dad\u4fee\u7387\u4f4e\u3002\u53ef\u61c9\u5c0d\u5f9e\u5c0f\u529f\u7387\uff085 W\uff09\u5230\u5927\u529f\u7387\uff08100 W+\uff09\u7684\u591a\u500b\u61c9\u7528\u5834\u666f\u3002<\/p>\n\n<h3>\u5177\u9ad4\u4fdd\u8b77\u96fb\u8def\u8a2d\u8a08<\/h3>\n<p>\u96fb\u8def\u67b6\u69cb\u70ba\uff1aAC \u8f38\u5165\u7aef\u653e\u7f6e MOV \u9632\u7a81\u6ce2\uff08\u7dca\u9760\u8f38\u5165\u7aef\u5b50\uff09\uff0c\u7d93\u904e\u6a4b\u5f0f\u6574\u6d41\u548c\u6ffe\u6ce2\u96fb\u5bb9\u5f8c\uff0c\u9032\u5165\u964d\u58d3\u6a21\u584a\u548c\u6046\u6d41\u6676\u7247\uff0c\u6700\u5f8c\u5728\u9a45\u52d5\u5668\u8f38\u51fa\u7aef\u8207 LED \u4e32\u4e4b\u9593\u4e32\u806f PPTC \u9032\u884c\u904e\u96fb\u6d41\u4fdd\u8b77\u3002<\/p>\n\n<h2>\u5143\u4ef6\u9078\u578b\u4f9d\u64da\u8207\u95dc\u9375\u53c3\u6578<\/h2>\n\n<h3>MOV \u7684\u9078\u578b\u6b65\u9a5f<\/h3>\n<p><strong>\u7b2c\u4e00\u6b65\uff1a\u78ba\u5b9a\u5de5\u4f5c\u96fb\u58d3<\/strong> \u2014 \u5c0d\u65bc AC 110\uff5e240 V \u8f38\u5165\u7684\u9a45\u52d5\u5668\uff0c\u6309 AC 240 V \u5cf0\u503c\u8a2d\u8a08\u3002MOV \u58d3\u654f\u96fb\u58d3 V\u2081mA = 1.5 \u00d7 340 \u2248 510 V\u3002\u5be6\u52d9\u9078\u64c7 510 V \u6216 550 V \u898f\u683c\u3002<\/p>\n<p><strong>\u7b2c\u4e8c\u6b65\uff1a\u78ba\u5b9a\u6700\u5927\u7a81\u6ce2\u96fb\u6d41<\/strong> \u2014 \u6839\u64da IEC 61000-4-5 \u6a19\u6e96\uff0c\u5de5\u696d\u74b0\u5883\u61c9\u9078\u64c7\u80fd\u627f\u53d7\u81f3\u5c11 500 A \u7a81\u6ce2\u96fb\u6d41\u7684 MOV\uff0c\u9078\u7528 14D \u6216 20D \u898f\u683c\u3002<\/p>\n<p><strong>\u7b2c\u4e09\u6b65\uff1a\u78ba\u5b9a\u5c3a\u5bf8\u548c\u80fd\u91cf\u7b49\u7d1a<\/strong> \u2014 10D \u9069\u7528\u5c0f\u529f\u7387\u300114D \u9069\u7528\u4e2d\u7b49\u529f\u7387\uff0810\uff5e30 W\uff09\u300120D \u9069\u7528\u5927\u529f\u7387\uff0850 W+\uff09\u3002\u5178\u578b 50 W LED \u9a45\u52d5\u5668\u63a8\u85a6\u9078\u7528 510 V \/ 20D MOV\uff0c\u80fd\u91cf\u5438\u6536\u80fd\u529b \u2265 60 J\u3002<\/p>\n\n<h3>PPTC \u7684\u9078\u578b\u6b65\u9a5f<\/h3>\n<p><strong>\u7b2c\u4e00\u6b65\uff1a\u78ba\u5b9a\u6301\u7e8c\u5de5\u4f5c\u96fb\u6d41<\/strong> \u2014 \u5047\u8a2d\u8f38\u51fa\u984d\u5b9a\u96fb\u6d41\u70ba 1.5 A\uff0cPPTC \u7684\u4fdd\u6301\u96fb\u6d41 I_h \u8a2d\u5b9a\u5728\u984d\u5b9a\u96fb\u6d41\u7684 75\uff5e85%\uff0c\u5373 I_h \u2248 1.2 A\u3002<\/p>\n<p><strong>\u7b2c\u4e8c\u6b65\uff1a\u78ba\u5b9a\u8df3\u812b\u96fb\u6d41<\/strong> \u2014 I_h = 1.2 A \u7684 PPTC\uff0c\u5c0d\u61c9\u8df3\u812b\u96fb\u6d41 I_t \u901a\u5e38\u70ba 1.8\uff5e2.4 A\u3002<\/p>\n<p><strong>\u7b2c\u4e09\u6b65\uff1a\u78ba\u5b9a\u6700\u5927\u5de5\u4f5c\u96fb\u58d3<\/strong> \u2014 \u5c0d\u65bc 20 V \u8f38\u51fa\u9a45\u52d5\u5668\uff0c\u61c9\u9078\u7528 V_max \u2265 30 V \u7684 PPTC\u3002<\/p>\n<p><strong>\u7b2c\u56db\u6b65\uff1a\u78ba\u5b9a\u5c01\u88dd<\/strong> \u2014 \u6279\u91cf\u751f\u7522\u63a8\u85a6\u4f7f\u7528 SMD \u5c01\u88dd\uff0c\u4f8b\u5982 1812 \u6216 1206 \u5c3a\u5bf8\u3002<\/p>\n\n<h3>\u5be6\u969b\u96fb\u8def\u53c3\u6578\u7bc4\u4f8b<\/h3>\n<p>\u4ee5 50 W \/ AC 220 V \u8f38\u5165 \/ 30 V DC \u8f38\u51fa\u7684 LED \u9a45\u52d5\u5668\u70ba\u4f8b\uff1a<\/p>\n<table>\n<thead><tr><th>\u4f4d\u7f6e<\/th><th>\u5143\u4ef6\u985e\u578b<\/th><th>\u898f\u683c<\/th><th>\u4f5c\u7528<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>AC \u8f38\u5165<\/td><td>MOV<\/td><td>510 V 20D\uff0c\u7a81\u6ce2\u96fb\u6d41 800 A\uff0c\u80fd\u91cf 60 J<\/td><td>\u5438\u6536\u7a81\u6ce2\uff0c\u4fdd\u8b77\u6574\u6d41\u7d1a<\/td><\/tr>\n<tr><td>AC \u8f38\u5165<\/td><td>\u6ffe\u6ce2\u96fb\u5bb9<\/td><td>2 \u00d7 470 \u00b5F \/ 400 V<\/td><td>\u627f\u8f09\u9257\u5236\u5f8c\u80fd\u91cf<\/td><\/tr>\n<tr><td>DC \u8f38\u51fa<\/td><td>PPTC<\/td><td>1.2 A \/ 30 V SMD 1812<\/td><td>\u9650\u5236 LED \u4e32\u904e\u96fb\u6d41<\/td><\/tr>\n<tr><td>DC \u8f38\u51fa<\/td><td>\u6ffe\u6ce2\u96fb\u5bb9<\/td><td>47 \u00b5F \/ 50 V<\/td><td>\u6d88\u9664\u9ad8\u983b\u7d0b\u6ce2<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n<h2>PCB \u4f48\u5c40\u8207\u8a2d\u8a08\u8981\u9ede<\/h2>\n\n<h3>MOV \u7684 PCB \u4f48\u5c40\u539f\u5247<\/h3>\n<p>MOV \u61c9\u76f4\u63a5\u710a\u63a5\u5728 AC \u8f38\u5165\u7aef\u5b50\u65c1\u908a\uff08\u8ddd\u96e2 < 1 cm\uff09\uff0c\u4ee5\u6700\u77ed\u7684\u8d70\u7dda\u8ddd\u96e2\u63a5\u6536\u7a81\u6ce2\u80fd\u91cf\u3002GND \u8ff4\u8def\u61c9\u55ae\u7368\u5f9e\u5927\u9762\u7a4d\u9285\u7b94\u8fd4\u56de\u5230\u8f38\u5165\u7aef\u5b50\u7684 GND \u9ede\uff0c\u5f62\u6210\u661f\u5f62\u63a5\u5730\u3002MOV \u710a\u76e4\u5468\u570d\u61c9\u907f\u514d\u653e\u7f6e\u654f\u611f\u5668\u4ef6\uff0c\u4e26\u78ba\u4fdd\u6709\u9069\u7576\u7684\u6563\u71b1\u7a7a\u9593\uff08\u81f3\u5c11 5 mm \u7a7a\u767d\u5340\u57df\uff09\u3002<\/p>\n\n<h3>PPTC \u7684 PCB \u4f48\u5c40\u539f\u5247<\/h3>\n<p>PPTC \u61c9\u76e1\u53ef\u80fd\u9760\u8fd1\u9a45\u52d5\u5668\u8f38\u51fa\u7aef\uff0c\u8207 LED \u5149\u6e90\u4e32\u806f\u3002\u61c9\u907f\u514d\u653e\u5728\u9ad8\u6eab\u6563\u71b1\u5340\u57df\u9644\u8fd1\uff08\u4fdd\u6301\u81f3\u5c11 10 mm \u9593\u8ddd\uff09\uff0c\u5468\u570d\u8a2d\u8a08\u9069\u7576\u5bec\u5ea6\u7684\u9285\u7b94\uff08\u81f3\u5c11 20 mm\u00b2\uff09\u4ee5\u52a0\u901f\u6563\u71b1\u3002\u8d70\u7dda\u61c9\u76e1\u91cf\u5bec\u95ca\uff08\u2265 0.5 mm\uff09\uff0c\u6700\u5c0f\u5316\u5bc4\u751f\u96fb\u963b\u3002<\/p>\n\n<h2>\u65b9\u6848\u512a\u52e2\u8207\u5c0d\u6bd4\u5206\u6790<\/h2>\n\n<h3>\u8207\u50b3\u7d71\u4fdd\u96aa\u7d72\u65b9\u6848\u7684\u6bd4\u8f03<\/h3>\n<table>\n<thead><tr><th>\u7279\u6027<\/th><th>\u50b3\u7d71\u73bb\u7483\u4fdd\u96aa\u7d72<\/th><th>PPTC \u65b9\u6848<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u97ff\u61c9\u6642\u9593<\/td><td>100\uff5e1000 ms<\/td><td>10\uff5e100 ms<\/td><\/tr>\n<tr><td>\u904e\u8f09\u5f8c\u6062\u5fa9<\/td><td>\u9700\u8981\u4eba\u5de5\u66f4\u63db<\/td><td>\u81ea\u52d5\u6062\u5fa9<\/td><\/tr>\n<tr><td>\u7dad\u8b77\u6210\u672c<\/td><td>\u9ad8\uff08\u73fe\u5834\u66f4\u63db\uff09<\/td><td>\u4f4e\uff08\u81ea\u52d5\u6062\u5fa9\uff09<\/td><\/tr>\n<tr><td>\u591a\u6b21\u904e\u8f09\u8010\u53d7<\/td><td>\u5dee\uff08\u6613\u71d2\u6bc0\uff09<\/td><td>\u512a\u79c0\uff08> 100 \u6b21\u5faa\u74b0\uff09<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p>\u6236\u5916\u61c9\u7528\u548c\u96e3\u4ee5\u73fe\u5834\u7dad\u4fee\u7684\u5834\u666f\uff0c\u5f37\u70c8\u63a8\u85a6 PPTC + MOV \u65b9\u6848\u3002<\/p>\n\n<h3>\u6210\u672c\u6548\u76ca\u5206\u6790<\/h3>\n<p>\u4ee5\u5e74\u7522 10 \u842c\u500b 50 W LED \u9a45\u52d5\u5668\u70ba\u4f8b\uff0c\u6bcf\u500b\u9a45\u52d5\u5668\u589e\u52a0\u4fdd\u8b77\u65b9\u6848\u6210\u672c\u7d04 \u00a52.5\uff0c\u4f46\u53ef\u5c07\u73fe\u5834\u6545\u969c\u7387\u5f9e 8% \u964d\u81f3 0.5%\uff0c\u5e74\u5ea6\u7bc0\u7701\u6de8\u503c\u9054 \u00a587.5 \u842c\uff0c\u6295\u8cc7\u56de\u5831\u7387\u8d85\u904e 300%\u3002<\/p>\n\n<h2>\u53ef\u9760\u6027\u9a57\u8b49\u8207\u6e2c\u8a66<\/h2>\n<p>\u63a8\u85a6\u7684\u9a57\u8b49\u6e2c\u8a66\u9805\u76ee\u5305\u62ec\uff1aIEC 61000-4-5 \u7a81\u6ce2\u6297\u64fe\u5ea6\u6e2c\u8a66\uff08AC \u8f38\u5165\u7aef\u65bd\u52a0 \u00b1 1 kV \u6ce2\u5f62\uff09\u3001PPTC \u904e\u96fb\u6d41\u97ff\u61c9\u6e2c\u8a66\uff08\u63d0\u9ad8\u8f38\u51fa\u96fb\u6d41\u81f3 1.5\uff5e2 \u500d\u9a57\u8b49\u81ea\u52d5\u9650\u6d41\uff09\u3001\u6eab\u5ea6\u5faa\u74b0\u6e2c\u8a66\uff08-10\u2103\uff5e85\u2103 \u53cd\u5fa9\u5faa\u74b0 10 \u6b21\uff09\u3001\u4ee5\u53ca\u9577\u671f\u58fd\u547d\u6e2c\u8a66\uff0855\u2103 \u74b0\u5883\u4e0b\u9023\u7e8c\u904b\u884c 1000 \u5c0f\u6642\uff09\u3002<\/p>\n\n<h2>\u591a\u7d1a\u9632\u8b77\u65b9\u6848\uff08\u91dd\u5c0d\u6975\u7aef\u74b0\u5883\uff09<\/h2>\n<p>\u5c0d\u65bc\u9ad8\u6d77\u62d4\u3001\u9ad8\u9e7d\u9727\u3001\u76f4\u96f7\u5340\u7b49\u56b4\u9177\u74b0\u5883\uff0c\u53ef\u5728 MOV \u5f8c\u589e\u52a0\u4e8c\u7d1a <a href=\"https:\/\/shen-jia.com.tw\/tvs-2\/\">TVS \u9663\u5217<\/a>\u4f5c\u70ba\u8f14\u52a9\u4fdd\u8b77\u3002\u4e00\u7d1a MOV \u5438\u6536\u4e3b\u9ad4\u80fd\u91cf\uff0c\u4e8c\u7d1a TVS \u8655\u7406\u9918\u91cf\uff0c\u6210\u672c\u589e\u52a0\u50c5 \u00a51\uff5e2\uff0c\u4f46\u53ef\u9760\u6027\u63d0\u5347\u660e\u986f\u3002<\/p>\n\n<h2>\u7d50\u8a9e\u8207\u5efa\u8b70<\/h2>\n<p>LED \u9a45\u52d5\u5668\u7684\u96fb\u8def\u4fdd\u8b77\u4e26\u975e\u53ef\u9078\u9805\uff0c\u800c\u662f\u78ba\u4fdd\u7522\u54c1\u53ef\u9760\u6027\u548c\u7528\u6236\u5b89\u5168\u7684\u5fc5\u8981\u8a2d\u8a08\u3002MOV + PPTC \u7684\u7d44\u5408\u65b9\u6848\u4ee5\u6975\u4f4e\u7684\u6210\u672c\u4ee3\u50f9\u5be6\u73fe\u4e86\u5168\u9762\u7684\u96fb\u6c23\u9632\u8b77\uff0c\u61c9\u4f5c\u70ba LED \u9a45\u52d5\u5668\u7684\u6a19\u6e96\u914d\u7f6e\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 LED \u9a45\u52d5\u5668\u4fdd\u8b77\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 MOV \u8207 PPTC \u7d44\u5408\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\": \"\u70ba\u4ec0\u9ebc PPTC \u6bd4\u50b3\u7d71\u4fdd\u96aa\u7d72\u66f4\u9069\u5408 LED \u9a45\u52d5\u5668\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"LED \u9a45\u52d5\u5668\u5728\u6236\u5916\u61c9\u7528\u4e2d\u53ef\u80fd\u591a\u6b21\u9047\u5230\u77ac\u9593\u904e\u8f09\u3002\u50b3\u7d71\u4fdd\u96aa\u7d72\u7194\u65b7\u4e00\u6b21\u5c31\u5831\u5ee2\uff0c\u9700\u8981\u4eba\u5de5\u66f4\u63db\uff1b\u800c PPTC \u81ea\u52d5\u6062\u5fa9\uff0c\u5141\u8a31\u591a\u6b21\u904e\u8f09-\u6062\u5fa9\u5faa\u74b0\uff0c\u5927\u5e45\u964d\u4f4e\u73fe\u5834\u7dad\u8b77\u6210\u672c\u3002\u5c0d\u65bc\u96e3\u4ee5\u5feb\u901f\u7dad\u4fee\u7684\u61c9\u7528\uff08\u5982\u9ad8\u7a7a\u8def\u71c8\uff09\uff0cPPTC \u7684\u81ea\u6062\u5fa9\u7279\u6027\u5c24\u70ba\u95dc\u9375\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"MOV \u6703\u4e0d\u6703\u56e0\u70ba\u5438\u6536\u7a81\u6ce2\u80fd\u91cf\u800c\u640d\u58de\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"MOV \u7684\u58fd\u547d\u53d6\u6c7a\u65bc\u80fd\u91cf\u5438\u6536\u6b21\u6578\u3002\u4e00\u500b 20D MOV \u8a2d\u8a08\u58fd\u547d\u5167\u53ef\u627f\u53d7\u6578\u5341\u6b21 60 J \u7d1a\u7684\u7a81\u6ce2\u6ce8\u5165\u3002\u9078\u64c7\u5c3a\u5bf8\u6642\u61c9\u9810\u7559\u9918\u5ea6\uff0c\u9078\u6bd4\u9700\u6c42\u5927\u4e00\u7b49\u7d1a\u7684\u7522\u54c1\uff08\u4f8b\u5982\u9700\u8981 40 J \u5c31\u9078 60 J \u898f\u683c\uff09\uff0c\u53ef\u78ba\u4fdd 5\uff5e10 \u5e74\u58fd\u547d\u5167\u7121\u98a8\u96aa\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"PPTC \u81ea\u52d5\u6062\u5fa9\u9700\u8981\u591a\u9577\u6642\u9593\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u5178\u578b\u60c5\u6cc1\u4e0b\uff0cPPTC \u5728\u6545\u969c\u6392\u9664\u5f8c\u9700\u8981 5\uff5e30 \u5206\u9418\u5b8c\u5168\u6062\u5fa9\u5230\u521d\u59cb\u72c0\u614b\uff0c\u5177\u9ad4\u6642\u9593\u53d6\u6c7a\u65bc\u5468\u908a\u6eab\u5ea6\u548c\u6563\u71b1\u8a2d\u8a08\u3002\u5982\u679c\u6545\u969c\u88ab\u53ca\u6642\u8655\u7406\uff0cPPTC \u6703\u81ea\u52d5\u6062\u5fa9\u4e26\u6062\u5fa9\u6b63\u5e38\u9a45\u52d5\uff1b\u5982\u679c\u6545\u969c\u6301\u7e8c\u5b58\u5728\uff0cPPTC \u6703\u6301\u7e8c\u5347\u6eab\u9650\u6d41\u8d77\u5230\u4fdd\u8b77\u4f5c\u7528\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u5982\u4f55\u78ba\u5b9a PPTC \u7684\u4fdd\u6301\u96fb\u6d41\uff08I_h\uff09\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u5efa\u8b70 I_h = \u984d\u5b9a\u96fb\u6d41 \u00d7 0.75\uff5e0.85\u3002\u4f8b\u5982\u9a45\u52d5\u5668\u984d\u5b9a\u8f38\u51fa 1.5 A\uff0c\u5247 I_h \u61c9\u5728 1.1\uff5e1.3 A \u7bc4\u570d\u3002\u9019\u6a23\u53ef\u78ba\u4fdd\u6b63\u5e38\u5de5\u4f5c\u6642 PPTC \u4e0d\u6703\u8aa4\u89f8\u767c\uff0c\u540c\u6642\u7576\u904e\u96fb\u6d41\u767c\u751f\u6642\u80fd\u53ca\u6642\u555f\u52d5\u4fdd\u8b77\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"MOV \u548c PPTC \u4e4b\u9593\u6709\u6c92\u6709\u4ea4\u4e92\u5e72\u64fe\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u57fa\u672c\u6c92\u6709\u3002MOV \u5de5\u4f5c\u5728 AC \u8f38\u5165\u7aef\u8655\u7406\u6beb\u79d2\u7d1a\u7684\u77ac\u9593\u7a81\u6ce2\uff0cPPTC \u5de5\u4f5c\u5728 DC \u8f38\u51fa\u7aef\u8655\u7406\u79d2\u7d1a\u7684\u904e\u96fb\u6d41\u3002\u5169\u8005\u8655\u65bc\u4e0d\u540c\u7684\u983b\u6bb5\u548c\u6642\u9593\u5c3a\u5ea6\uff0c\u76f8\u4e92\u7368\u7acb\u3002\u4f46 PCB \u4f48\u5c40\u6642\u61c9\u907f\u514d MOV \u7684\u9ad8\u983b\u566a\u97f3\u8026\u5408\u5230 PPTC \u5468\u908a\u3002\"\n      }\n    }\n  ]\n}\n<\/script>","protected":false},"excerpt":{"rendered":"<p>LED \u9a45\u52d5\u96fb\u8def\u5728\u73fe\u4ee3\u7167\u660e\u7cfb\u7d71\u4e2d\u626e\u6f14\u95dc\u9375\u89d2\u8272\uff0c\u7121\u8ad6\u662f\u6236\u5916\u8def\u71c8\u3001\u5ba4\u5167\u5546\u7528\u7167\u660e\u9084\u662f\u5de5\u696d\u5ee0\u623f\u7684\u65e5\u7167\u88dc\u511f\u7cfb\u7d71\uff0cLED  [&#8230;]\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[72],"tags":[],"class_list":["post-971","post","type-post","status-publish","format-standard","hentry","category-application-cases"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>LED \u9a45\u52d5\u96fb\u8def\u4fdd\u8b77\u8a2d\u8a08\uff1a\u5982\u4f55\u9078\u64c7\u6b63\u78ba\u7684 MOV \u8207 PPTC | \u627f\u5609\u79d1\u6280<\/title>\n<meta name=\"description\" content=\"\u5b8c\u6574\u7684 LED \u9a45\u52d5\u96fb\u8def\u4fdd\u8b77\u65b9\u6848\u3002\u4e86\u89e3\u5982\u4f55\u4f7f\u7528 MOV \u548c PPTC \u9032\u884c\u7a81\u6ce2\u8207\u904e\u96fb\u6d41\u4fdd\u8b77\uff0c\u5305\u62ec\u9078\u578b\u53c3\u6578\u3001PCB \u4f48\u5c40\u548c\u53ef\u9760\u6027\u9a57\u8b49\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/shen-jia.com.tw\/en\/led-driver-circuit-protection\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LED \u9a45\u52d5\u96fb\u8def\u4fdd\u8b77\u8a2d\u8a08\uff1a\u5982\u4f55\u9078\u64c7\u6b63\u78ba\u7684 MOV \u8207 PPTC | \u627f\u5609\u79d1\u6280\" \/>\n<meta property=\"og:description\" content=\"\u5b8c\u6574\u7684 LED \u9a45\u52d5\u96fb\u8def\u4fdd\u8b77\u65b9\u6848\u3002\u4e86\u89e3\u5982\u4f55\u4f7f\u7528 MOV \u548c PPTC 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