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TPS54319 会坏掉

Other Parts Discussed in Thread: TPS54319

上图上TPS54319的电路,这是一个用USB电源供电,转换成4V左右的电源给通讯模块供电的设备,最近客户反应有部份TPS54319会烧坏的现象,换掉就好了,我们一直找资源去解决这个问题,一直找不到原厂资料,所以只能在TI的官网求助分析一下原因,希望尽快回复,看看是否是设计问题。谢谢。