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BUCK IC 频繁坏掉!!!

Other Parts Discussed in Thread: TPS62050

  板子上某功能不正常工作,诊断为电源芯片TPS62050损坏,更换后正常了,第二天再来测,发现又不正常了,结果还是TPS62050坏了,。。。。。。。这是咋回事????各位遇到这样的情况吗????