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TPS54360烧毁问题

Other Parts Discussed in Thread: TPS54360

       各位老师请帮我分析一下此电路是否存在问题,现在产品生产了500套,在厂里做老化试验,近一周时间烧毁了6张。具体表现为VIN、SW对GND短路。输入AC24经整流滤波后最高为42V左右,输出为5V---0.5A。