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LM3401通电后HG与VIN管脚短路

Other Parts Discussed in Thread: LM3401

求助:

   使用LM3401时,供电5V/3A。通电后无输出,测试发现LM3401的HG与VIN短路,将LM3401焊下来后再测量没有短路现象,再次焊上通电发现再次短路。PMOS管方向在焊接的时候已经修改过