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TPS5430的VIN和GND导通

Other Parts Discussed in Thread: TPS5430

24VDC电源通过0.5A的FUSE和IN5819二极管后送入TPS5430,转换成5VDC输出。发现TPS5430有损坏,其VIN和GND导通,请问问题出在什么地方?5VDC负载只有2W左右。