{"id":17144,"date":"2026-06-29T15:23:59","date_gmt":"2026-06-29T07:23:59","guid":{"rendered":"http:\/\/www.szryc.com\/?p=17144"},"modified":"2026-06-29T15:23:59","modified_gmt":"2026-06-29T07:23:59","slug":"tl431pc817-%e5%bc%80%e5%85%b3%e7%94%b5%e6%ba%90%e5%8f%8d%e9%a6%88%e5%9b%9e%e8%b7%af%e5%85%a8%e5%a5%97%e6%95%85%e9%9a%9c%e5%88%a4%e6%96%ad","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=17144","title":{"rendered":"TL431+PC817 \u5f00\u5173\u7535\u6e90\u53cd\u9988\u56de\u8def\u5168\u5957\u6545\u969c\u5224\u65ad"},"content":{"rendered":"
\n

TL431+PC817 \u5f00\u5173\u7535\u6e90\u53cd\u9988\u56de\u8def\u5168\u5957\u6545\u969c\u5224\u65ad<\/h1>\n<\/div>\n
\n
\u5178\u578b\u7535\u8def\u903b\u8f91\uff1a\u8f93\u51fa\u5206\u538b\u2192TL431 REF\uff0cTL431 \u9634\u6781\u9a71\u52a8 PC817 \u53d1\u5149\u4e8c\u6781\u7ba1\uff0cPC817 \u5149\u654f\u7ba1\u7ed9\u539f\u8fb9 PWM \u63d0\u4f9b\u53cd\u9988\u3002<\/p>\n
\u00a0<\/div>\n

\u6545\u969c\u5206 4 \u5927\u7c7b\uff1a\u8f93\u51fa\u7535\u538b\u504f\u9ad8\u3001\u8f93\u51fa\u504f\u4f4e \/ \u65e0\u8f93\u51fa\u3001\u5e26\u8f7d\u4e0d\u7a33\u3001\u95f4\u6b47\u6ce2\u52a8<\/strong>\uff0c\u9010\u4e2a\u533a\u5206\u662f TL431 \u574f\u8fd8\u662f PC817 \u574f\uff0c\u6216\u662f\u5206\u538b\u7535\u963b\u95ee\u9898\u3002<\/div>\n<\/div>\n

\n

\u4e00\u3001\u5148\u7406\u6e05\u6b63\u5e38\u5de5\u4f5c\u903b\u8f91<\/h2>\n<\/div>\n
\n
\u8f93\u51fa\u7535\u538b\u2191 \u2192 REF\uff1e2.5V \u2192 TL431 \u9634\u6781\u7535\u6d41\u53d8\u5927 \u2192 PC817 LED \u7535\u6d41\u589e\u5927 \u2192 \u5149\u654f\u7ba1\u5bfc\u901a\u52a0\u6df1 \u2192 \u539f\u8fb9 PWM \u5360\u7a7a\u6bd4\u51cf\u5c0f \u2192 \u8f93\u51fa\u56de\u843d<\/p>\n
\u00a0<\/div>\n

\u8f93\u51fa\u7535\u538b\u2193 \u2192 REF\uff1c2.5V \u2192 TL431 \u51e0\u4e4e\u622a\u6b62 \u2192 PC817 LED \u5fae\u7535\u6d41 \u2192 \u5149\u654f\u7ba1\u63a5\u8fd1\u622a\u6b62 \u2192 PWM \u5360\u7a7a\u6bd4\u62c9\u5927 \u2192 \u8f93\u51fa\u56de\u5347<\/p><\/div>\n<\/div>\n

\n

\u4e8c\u3001\u6545\u969c 1\uff1a\u8f93\u51fa\u7535\u538b\u5927\u5e45\u504f\u9ad8\uff08\u6700\u5e38\u89c1\uff0c\u6781\u6613\u70e7\u8d1f\u8f7d\uff09<\/h2>\n<\/div>\n
\n

\u73b0\u8c61<\/h3>\n<\/div>\n
\n
\u7a7a\u8f7d \/ \u5e26\u8f7d\u7535\u538b\u8fdc\u8d85\u6807\u79f0\u503c\uff08\u6bd4\u5982 5V \u7535\u6e90\u8dd1\u5230 7~12V+\uff09\uff0c\u751a\u81f3\u70b8\u540e\u7ea7\u82af\u7247\u3001LED\u3002<\/div>\n<\/div>\n
\n

\u6839\u56e0\uff1a\u53cd\u9988\u73af\u8def\u65ad\u5f00\uff0cTL431 \u65e0\u6cd5\u62c9\u4f4e\u5149\u8026\u7535\u6d41<\/h3>\n<\/div>\n
\n

1\uff09PC817 \u635f\u574f\uff08LED \u4fa7\u5f00\u8def\uff09<\/h4>\n<\/div>\n
\n
    \n
  • \u6d4b\u91cf PC817 1\u30012 \u811a\uff1a\u6b63\u53cd\u90fd\u65e0\u7a77\u5927\uff0c\u5185\u90e8\u53d1\u5149\u4e8c\u6781\u7ba1\u65ad\u8def<\/li>\n
  • \u73af\u8def\u5931\u6548\uff0c\u539f\u8fb9\u6301\u7eed\u6ee1\u5360\u7a7a\u6bd4\uff0c\u7535\u538b\u98d9\u5347<\/li>\n<\/ul>\n<\/div>\n
    \n

    2\uff09TL431 \u5f00\u8def\u635f\u574f<\/h4>\n<\/div>\n
    \n
    K\u3001A \u4e4b\u95f4\u5b8c\u5168\u65ad\u5f00\uff0c\u65e0\u8bba REF \u7535\u538b\u591a\u5c11\uff0c\u6ca1\u6709\u7535\u6d41\u6d41\u8fc7\u5149\u8026 LED<\/div>\n<\/div>\n
    \n

    3\uff09\u5206\u538b\u7535\u963b\u6545\u969c<\/h4>\n<\/div>\n
    \n
    \u4e0a\u5206\u538b\u7535\u963b\u5f00\u8def\u3001\u4e0b\u5206\u538b\u7535\u963b\u963b\u503c\u53d8\u5927\uff1bREF \u7535\u538b\u4f4e\u4e8e 2.5V\uff0cTL431 \u4e0d\u5bfc\u901a<\/div>\n<\/div>\n
    \n

    4\uff09\u56de\u8def\u9650\u6d41\u7535\u963b\u5f00\u8def\uff08TL431 \u9634\u6781\u4e32\u8054\u7535\u963b\uff09<\/h4>\n<\/div>\n
    \n
    \u5149\u8026 LED \u65e0\u4f9b\u7535\uff0c\u53cd\u9988\u5931\u6548<\/div>\n<\/div>\n
    \n

    \u5feb\u901f\u533a\u5206 TL431 \/ \u5149\u8026<\/h3>\n<\/div>\n
    \n
    \u65ad\u5f00 PC817 1 \u811a\uff0c\u5916\u63a5 1k \u7535\u963b\u63a5 5V\uff0c\u4eba\u4e3a\u70b9\u4eae\u5149\u8026\uff1a<\/div>\n<\/div>\n
    \n
      \n
    • \u7535\u538b\u7acb\u523b\u4e0b\u964d\u6062\u590d\u6b63\u5e38 \u2192 \u6545\u969c\u5728 TL431 \u6216\u5206\u538b\u7535\u963b<\/li>\n
    • \u7535\u538b\u4f9d\u65e7\u504f\u9ad8 \u2192 PC817 \u53d1\u5149\u7ba1\u5f00\u8def<\/li>\n<\/ul>\n<\/div>\n
      \n

      \u4e09\u3001\u6545\u969c 2\uff1a\u8f93\u51fa\u7535\u538b\u504f\u4f4e\u3001\u5e26\u4e0d\u52a8\u8d1f\u8f7d\uff0c\u751a\u81f3\u65e0\u8f93\u51fa<\/h2>\n<\/div>\n
      \n

      \u73b0\u8c61<\/h3>\n<\/div>\n
      \n
      \u7a7a\u8f7d\u7535\u538b\u504f\u4f4e\uff0c\u4e00\u5e26\u8f7d\u76f4\u63a5\u6389\u5230\u5f88\u4f4e\uff0c\u4e25\u91cd\u65f6\u65e0\u7535\u538b\u8f93\u51fa<\/div>\n<\/div>\n
      \n

      \u6839\u56e0\uff1a\u53cd\u9988\u73af\u8def\u6301\u7eed\u5bfc\u901a\uff0c\u5f3a\u5236 PWM \u964d\u5360\u7a7a\u6bd4<\/h3>\n<\/div>\n
      \n

      1\uff09PC817 \u5149\u654f\u4e09\u6781\u7ba1\u51fb\u7a7f\u77ed\u8def\uff083\u30014 \u811a\u6f0f\u7535 \/ \u76f4\u901a\uff09<\/h4>\n<\/div>\n
      \n
      \u5149\u654f\u7ba1\u957f\u671f\u5bfc\u901a\uff0c\u539f\u8fb9\u8bef\u4ee5\u4e3a\u8f93\u51fa\u8fc7\u9ad8\uff0c\u6301\u7eed\u51cf\u5c0f\u5360\u7a7a\u6bd4\uff0c\u8f93\u51fa\u88ab\u62c9\u4f4e<\/p>\n
      \u00a0<\/div>\n

      \u6d4b\u91cf\uff1a\u65e0\u5149\u65f6 3\u30014 \u811a\u6709\u5bfc\u901a\u963b\u503c\uff0c\u6b63\u5e38\u5e94\u4e3a\u65e0\u7a77\u5927<\/p><\/div>\n<\/div>\n

      \n

      2\uff09TL431 \u51fb\u7a7f\uff08K-A \u77ed\u8def\uff09<\/h4>\n<\/div>\n
      \n
      TL431 \u9634\u6781\u6301\u7eed\u5927\u7535\u6d41\uff0c\u5149\u8026 LED \u5e38\u4eae\uff0c\u53cd\u9988\u4e00\u76f4\u62c9\u4f4e\u8f93\u51fa<\/p>\n
      \u00a0<\/div>\n

      \u6d4b TL431\uff1aK\u3001A \u6b63\u53cd\u90fd\u5bfc\u901a\uff0c\u5185\u90e8\u51fb\u7a7f<\/p><\/div>\n<\/div>\n

      \n

      3\uff09\u5206\u538b\u4e0b\u7535\u963b\u77ed\u8def \/ \u963b\u503c\u53d8\u5c0f<\/h4>\n<\/div>\n
      \n
      REF \u7535\u538b\u9ad8\u4e8e 2.5V\uff0cTL431 \u6301\u7eed\u5bfc\u901a\uff0c\u62c9\u4f4e\u8f93\u51fa<\/div>\n<\/div>\n
      \n

      \u5feb\u901f\u533a\u5206<\/h3>\n<\/div>\n
      \n
      \u65ad\u5f00 PC817 3\/4 \u811a\uff0c\u5355\u72ec\u4e0a\u7535\uff1a<\/div>\n<\/div>\n
      \n
        \n
      • \u8f93\u51fa\u6062\u590d\u6b63\u5e38 \u2192 PC817 \u5149\u654f\u7ba1\u51fb\u7a7f<\/li>\n
      • \u4f9d\u65e7\u4f4e\u538b \u2192 TL431 \u51fb\u7a7f\u6216\u5206\u538b\u7535\u963b\u5f02\u5e38<\/li>\n<\/ul>\n<\/div>\n
        \n

        \u56db\u3001\u6545\u969c 3\uff1a\u7535\u538b\u4e0d\u7a33\u3001\u8df3\u53d8\u3001\u7eb9\u6ce2\u5927\u3001\u5e26\u8f7d\u6296\u52a8<\/h2>\n<\/div>\n
        \n

        \u73b0\u8c61<\/h3>\n<\/div>\n
        \n
        \u7535\u538b\u6765\u56de\u6f02\u79fb\uff0c\u8f7b\u8f7d\u6b63\u5e38\u3001\u91cd\u8f7d\u6ce2\u52a8\uff0c\u5145\u7535\u5668\u4e0d\u505c\u8df3\u706f<\/div>\n<\/div>\n
        \n
          \n
        1. PC817 CTR \u8870\u51cf\u8001\u5316<\/strong>\n
          \u00a0<\/div>\n

          \u5149\u8026\u4f20\u8f93\u6bd4\u4e0b\u964d\uff0c\u9a71\u52a8\u80fd\u529b\u4e0d\u8db3\uff0c\u53cd\u9988\u8c03\u8282\u6ede\u540e\uff1b\u9759\u6001\u6d4b\u91cf\u597d\u574f\u90fd\u6b63\u5e38\uff0c\u4f46\u5e26\u8f7d\u5931\u63a7\uff0c\u76f4\u63a5\u66f4\u6362 PC817C\u3002<\/li>\n

        2. TL431 \u81ea\u6fc0\u632f\u8361<\/strong>\n
          \u00a0<\/div>\n

          REF \u4e0e A \u4e4b\u95f4\u7f3a\u5c11 0.1\u03bcF \u8865\u507f\u7535\u5bb9\uff0c\u73af\u8def\u632f\u8361\uff1b\u7535\u538b\u5c0f\u5e45\u9ad8\u9891\u8df3\u52a8\u3002<\/li>\n

        3. \u5206\u538b\u7535\u963b\u963b\u503c\u6f02\u79fb\u3001\u865a\u710a\uff1bTL431 \u6027\u80fd\u52a3\u5316\uff0c\u57fa\u51c6\u504f\u79bb 2.5V\u3002<\/li>\n
        4. \u5149\u8026\u3001TL431 \u5f15\u811a\u865a\u710a\uff0c\u56de\u8def\u65f6\u901a\u65f6\u65ad\u3002<\/li>\n<\/ol>\n<\/div>\n
          \n

          \u4e94\u3001\u6545\u969c 4\uff1a\u7a7a\u8f7d\u6b63\u5e38\uff0c\u4e00\u5e26\u8f7d\u7535\u538b\u98d9\u5347<\/h2>\n<\/div>\n
          \n
          \u5178\u578b\uff1a\u5149\u8026\u53d1\u5149\u4fa7\u9650\u6d41\u7535\u963b\u963b\u503c\u504f\u5927\uff0c\u5e26\u8f7d\u540e TL431 \u7535\u6d41\u4e0d\u8db3\uff0c\u53cd\u9988\u529b\u5ea6\u4e0d\u591f\uff1b\u6216 TL431 \u9634\u6781\u7535\u6d41\u4f4e\u4e8e 1mA\uff0c\u7a33\u538b\u5931\u6548\u3002<\/p>\n
          \u00a0<\/div>\n

          TL431 \u5de5\u4f5c\u533a\u95f4\u5fc5\u987b\u4fdd\u8bc1\u9634\u6781\u7535\u6d41 1~100mA\uff0c\u7535\u6d41\u592a\u5c0f\u57fa\u51c6\u5931\u63a7\u3002<\/p><\/div>\n<\/div>\n

          \n

          \u516d\u3001\u5feb\u901f\u68c0\u4fee\u6392\u67e5\u6b65\u9aa4\uff08\u5b9e\u64cd\u987a\u5e8f\uff09<\/h2>\n<\/div>\n
          \n
            \n
          1. \u65ad\u7535\u76ee\u89c6\u68c0\u67e5\n
            \u00a0<\/div>\n

            \u5206\u538b\u7535\u963b\u3001TL431\u3001PC817 \u6709\u65e0\u53d1\u9ed1\u3001\u9f13\u5305\u3001\u865a\u710a\u3001\u5f15\u811a\u77ed\u8def\uff1b\u8865\u507f\u7535\u5bb9\u6709\u65e0\u8131\u843d\u3002<\/li>\n

          2. \u9759\u6001\u6d4b\u91cf TL431<\/li>\n<\/ol>\n<\/div>\n
            \n
              \n
            • REF-A \u65e0\u77ed\u8def\uff1bK-A \u4e0d\u51fb\u7a7f\uff1b<\/li>\n
            • \u77ed\u63a5 K \u4e0e REF\uff0c\u901a\u7535\u6d4b REF=2.5V \u5de6\u53f3\uff0c\u57fa\u51c6\u6b63\u5e38\u3002<\/li>\n<\/ul>\n<\/div>\n
              \n
                \n
              1. \u9759\u6001\u6d4b\u91cf PC817<\/li>\n<\/ol>\n<\/div>\n
                \n
                  \n
                • 1\u30012 \u811a\u4e8c\u6781\u7ba1\u6863\u6b63\u5411\u6709\u538b\u964d\u3001\u53cd\u5411\u622a\u6b62\uff1b<\/li>\n
                • \u906e\u5149\u6d4b 3\u30014 \u811a\u65e0\u7a77\u5927\uff0c\u70b9\u4eae LED \u540e\u963b\u503c\u53d8\u5c0f\u3002<\/li>\n<\/ul>\n<\/div>\n
                  \n
                    \n
                  1. \u6d4b\u91cf\u5206\u538b REF \u70b9\u7535\u538b\n
                    \u00a0<\/div>\n

                    \u6807\u79f0\u8f93\u51fa\u4e0b\uff0cREF \u7406\u8bba\u503c = 2.5V\uff1a<\/li>\n<\/ol>\n<\/div>\n

                    \n
                      \n
                    • REF\uff1e2.5V\uff1aTL431 \u5e94\u5bfc\u901a\uff0c\u7535\u538b\u504f\u9ad8\u8bf4\u660e\u73af\u8def\u6ca1\u52a8\u4f5c\uff1b<\/li>\n
                    • REF\uff1c2.5V\uff1aTL431 \u622a\u6b62\uff0c\u7535\u538b\u504f\u4f4e\u8bf4\u660e\u73af\u8def\u4e00\u76f4\u5bfc\u901a\u3002<\/li>\n<\/ul>\n<\/div>\n
                      \n
                        \n
                      1. \u5206\u6bb5\u9694\u79bb\u5b9a\u4f4d\n
                        \u00a0<\/div>\n

                        \u65ad\u5f00\u5149\u8026\u53d1\u5149\u56de\u8def\uff0c\u5f3a\u5236\u7ed9 LED \u4f9b\u7535\uff1a<\/li>\n<\/ol>\n<\/div>\n

                        \n
                          \n
                        • \u7535\u538b\u80fd\u4e0b\u62c9 \u2192 \u540e\u7aef TL431 \/ \u5206\u538b\u95ee\u9898<\/li>\n
                        • \u7535\u538b\u65e0\u53d8\u5316 \u2192 PC817 \u635f\u574f<\/li>\n<\/ul>\n<\/div>\n
                          \n

                          \u4e03\u3001\u4e24\u79cd\u5668\u4ef6\u5178\u578b\u635f\u574f\u7279\u5f81\u5bf9\u7167\u8868<\/h2>\n<\/div>\n
                          \n
                          \n
                          \n
                          \u8868\u683c<\/div>\n
                          \n
                          \u00a0<\/div>\n
                          \u00a0<\/div>\n
                          \u00a0<\/div>\n<\/div>\n<\/div>\n
                          \n
                          \n
                          \n
                          \n\n\n\n\n\n\n\n\n
                          \u6545\u969c\u73b0\u8c61<\/th>\n\u5927\u6982\u7387\u635f\u574f\u4ef6<\/th>\n\u5224\u5b9a\u8981\u70b9<\/th>\n<\/tr>\n<\/thead>\n
                          \u8f93\u51fa\u5927\u5e45\u504f\u9ad8<\/td>\nPC817 LED \u5f00\u8def \/ TL431 \u5f00\u8def \/ \u5206\u538b\u4e0a\u7535\u963b\u65ad<\/td>\n\u5149\u8026 1-2 \u65e0\u5bfc\u901a\u538b\u964d<\/td>\n<\/tr>\n
                          \u8f93\u51fa\u504f\u4f4e \/ \u65e0\u8f93\u51fa<\/td>\nPC817 \u5149\u654f\u7ba1\u51fb\u7a7f \/ TL431 KA \u51fb\u7a7f<\/td>\n\u65e0\u5149\u65f6 3-4 \u5bfc\u901a<\/td>\n<\/tr>\n
                          \u7535\u538b\u6f02\u79fb\u3001\u6296\u52a8<\/td>\nPC817 \u8001\u5316 CTR \u4e0d\u8db3 \/ TL431 \u65e0\u8865\u507f\u7535\u5bb9<\/td>\n\u9759\u6001\u6d4b\u91cf\u6b63\u5e38\uff0c\u5e26\u8f7d\u5f02\u5e38<\/td>\n<\/tr>\n
                          \u51b7\u70ed\u673a\u7535\u538b\u53d8\u5316\u5927<\/td>\n\u5206\u538b\u7535\u963b\u6e29\u6f02\u5927 \/ TL431 \u7cbe\u5ea6\u7b49\u7ea7\u5dee<\/td>\n\u66f4\u6362 1% \u91d1\u5c5e\u819c\u7535\u963b + TL431A\/B<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
                          \n

                          \u516b\u3001\u914d\u5957\u7ef4\u4fee\u5c0f\u6280\u5de7<\/h2>\n<\/div>\n
                          \n
                            \n
                          1. \u66f4\u6362\u4f18\u5148\u914d\u5bf9\uff1aPC817C\uff08CTR200~400%\uff09+ TL431A\/B\uff0c\u4e0d\u8981\u7528\u4f4e\u6863 TL431\uff1b<\/li>\n
                          2. TL431 REF-A \u5fc5\u987b\u5e76\u8054 0.01~0.1\u03bcF \u9676\u74f7\u7535\u5bb9\u9632\u632f\u8361\uff1b<\/li>\n
                          3. \u5149\u8026 LED \u4e32\u8054\u9650\u6d41\u7535\u963b\u8ba1\u7b97\uff1a\u4fdd\u8bc1 IF=5~10mA\uff0c\u907f\u514d\u7535\u6d41\u8fc7\u5927\u70e7\u6bc1\u5149\u8026\uff1b<\/li>\n
                          4. \u5206\u538b\u9009\u7528 1k~100k \u91d1\u5c5e\u819c\u7535\u963b\uff0c\u907f\u514d\u78b3\u819c\u7535\u963b\u957f\u671f\u6f02\u79fb\u5bfc\u81f4\u7535\u538b\u504f\u79fb\u3002<\/li>\n<\/ol>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

                            TL431+PC817 \u5f00\u5173\u7535\u6e90\u53cd\u9988\u56de\u8def\u5168\u5957\u6545\u969c\u5224\u65ad \u5178\u578b\u7535\u8def\u903b\u8f91\uff1a\u8f93\u51fa\u5206\u538b\u2192TL431 REF\uff0cTL431 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,8],"tags":[],"class_list":["post-17144","post","type-post","status-publish","format-standard","hentry","category-7","category-8"],"_links":{"self":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/17144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=17144"}],"version-history":[{"count":1,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/17144\/revisions"}],"predecessor-version":[{"id":17146,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/17144\/revisions\/17146"}],"wp:attachment":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=17144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17144"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}