3842 7脚电压9——11。5v波动，6脚无电压 不装功率管时3842的7脚12.5v波动6脚8脚高电压高是啥...

\u4e3a\u4ec0\u4e48\u6211\u505a\u7684UC3842 \u4e03\u811a\u7535\u538b11\u523014.5V\u6ce2\u52a8\uff0c\u5176\u5b83\u7ba1\u811a\u6ca1\u7535\u538b\uff0c\u6211\u6362\u4e86\u51e0\u4e2aUC3842\u4e86\uff0c

\u542f\u52a8\u7535\u963b\u9009\u7684\u963b\u503c\u592a\u5927\u4e86\u5427\uff0c\u8fd9\u4e2a\u8303\u56f4\u6839\u672c\u5c31\u6ca1\u542f\u52a8\uff0c\u521a\u4e0a\u7535\u8981\u523016V\u4ee5\u4e0a\u624d\u80fd\u542f\u52a8\u82af\u7247\u5de5\u4f5c\u3002

6\u811a\u662f\u9a71\u52a8\u8109\u51b2\u8f93\u51fa\uff0c8\u811a\u662f\u82af\u7247\u5185\u90e8\u7a33\u538b\u8f93\u51fa\uff0c\u6b63\u5e38\u5e94\u8be5\u662f5V\uff0c\u5982\u679c\u8f93\u51fa\u7535\u538b\u4e0d\u662f5V\uff0c\u57fa\u672c\u4e0a\u90fd\u662f\u82af\u7247\u574f\u4e86\u3002

芯片VCC脚供电不足，偏置绕组加1-2匝试试看看

扩展阅读：电源3842芯片管脚图 ... 经典3842充电器电路高清图 ... 3842开关电源 7脚电压低 ... uc3842电源芯片引脚图 ... 6脚电源ic芯片对照表 ... 电焊机3846各脚电压 ... 8种常见电源管理ic芯片 ... 3845第8脚没5∨电压 ... 3845不起振 7脚电压8v ...