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高边运放INA193使用问题

Other Parts Discussed in Thread: INA193

25V直流供电,无刷电机应用场合,小电流运行时,INA193输出正常。大电机相电流峰值在5uS内达到150A,然而INA193没有产生正确的输出,为什么?

  • 您好,满量程输入电压范围Vsense= (VIN+ )−( VIN−)的最大电压为(Vs-0.2V)/Gain
    因此当25V供电,Gain=20的时候,VSense最大为1.24V。 而当电流为150A的时候,Vsense=150*0.03=4.5V,超过了Vsense的电压范围。