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LMR62421 数不出来12v

Other Parts Discussed in Thread: LMR62421

lmr62421 电路图如下。

 

现在出现的情况是 输出电压被拉至9.6v。 输入使用直流电源供电3.6v 3.1A 、

不知道什么情况。鼓捣了一个周了都。

请指导一下