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LM3671输出电压过大

Other Parts Discussed in Thread: LM3671

在使用LM3671的情况下,会出现电压超过设定值20%的情况。设定的输出电压为2.5V,实际输出电压2.9V。此时Vref电压为0.58V远超过参考值0.5V,请问是不是芯片本身的问题,还是拿到了假货?芯片本身的设计误差不会如此之大。原厂能否给解答一下,这批从代理拿的货全部是这样的,之前的一批都没有问题。

谢谢!