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INA271 在电路中容易烧坏的问题

Other Parts Discussed in Thread: INA271

大神们好:我想用INA271检测600ma左右电流。我把INA271的采样电阻放在了负载的负端,也就是INA271的IN+接负载负端然后接采样电阻然后IN-接地。

然后,我有别的需要工地的设备,接在IN-时,打火就会把片子烧坏,但是如果把片子放在负载前面 打火就没事了。这是什么原因呢?