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INA226: 反馈电流异常,无论输入多少,只反馈32A

Part Number: INA226


设计图纸如上,已经损坏了4颗芯片,现象如下

  1. 一个芯片板上测试时,实际电流只有不到1A,IIC读数是10A,误差非常大风枪吹下来做对比测试后,无论实际负载电流多少,读数彻底只有32A了;
  2. 其他损坏芯片直接IIC读数只有32A。