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UCC51521应用炸机问题

Other Parts Discussed in Thread: UCC21521

最近在做一款电源,采用的是TI去年推出的UCC21521在做隔离驱动,但是在带载(输出2A,150W左右)的时候出现炸机,经过确认发现,初级的所有IC均被损坏,同时自举电路的二极管损坏,附件电路请帮忙看看是不是有什么问题,同时这个二极管在选型的时候是不是有什么需要特别需要注意的地方???