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UCC28740: 烧毁

Part Number: UCC28740

UCC28740在运行过程中突然出现芯片烧毁以及MOSFET  采样电阻烧毁的原因,这个有可能是什么原因造成的?我们总共做了200台,出现了一例这样的烧毁现象。