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求大神!!!TPS54240通电烧掉的原因



当时没有在场,通电后芯片烧掉,有的连R16也一起烧掉,单片机也受影响,有没有大神指点一下,是什么原因?从哪方面着手?

本人新手,望大神指点,感激不尽!!!