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LM26420的一个输出不正常了。

Other Parts Discussed in Thread: LM26420

板卡上用了两个LM26420芯片,刚开始正常工作了一段时间了,但突然板上的两个芯片的有一个输出均不正常了,都无输出了。芯片的输入,EN信号均正常,不知道哪里出现了问题