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TPS56637: TPS56637RPAR上电烧毁

Part Number: TPS56637

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HI,下午好:

              我在用TPS56637RPAR做设计的时候遇到了一下问题想请教一下:原理图设计和PCB如上图,VBAT是6S电池,满电25.2V,负载功耗在8W左右,偶发在插上电池通电的时候芯片会烧掉,后级有些负载也会一起烧(可以确认不是负载短路导致的),示波器测试了输入跟输出波形,也没有过冲的情况,LAYOUT输入电容也是靠近芯片,想请教一下还有什么情况会导致芯片烧掉。盼回复,谢谢!