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LM5171: 上电后MOS管击穿

Part Number: LM5171

1、DT/SD下拉74.9K电阻;死区时间已经设置到最大200ns

2、OPT上拉49.9K电阻;相位180°

3、OSC下拉41.2K电阻;100KHz

4、上臂和下臂用的都是4个MOS并联,MOS管的参数如图:

目前的状态是只要上电(不带负载)下桥臂的MOS击穿,如果持续上电,上桥臂的MOS也会击穿。个人怀疑是CISS太大,死区时间太小导致的。

希望能提出排查方向?