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有没有110VDC输入，12VDC输出，1A电流的方案！！
Hi
如果隔离，你可以用UCC287XX, 例如UCC28700/10/40等等。
不隔离，可以用外部MOS的降压芯片，主要是做一个较低的电压给芯片供电。或者用TPS64203之类也行（将下面电路稍微修改一下）：
