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又烧坏一个,情况还是一样,不可能是焊接问题,三个了,故障都是有一个输出口的推挽输出的下管对地直通。每次焊好后都用万用表测量了确定没有短路情况才上电的,上电一般不会立即坏,都是不知道什么时候那个关机指示灯就亮起了,芯片到此结束。,1楼附件里有原理图,烦请瞄一眼,有没有严重错误,我对比芯片手册对了好几遍都没发现哪里错。