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DRV8874: current sampling

Part Number: DRV8874
Other Parts Discussed in Thread: DRV8701,

Hi Team,

Q1: Customer used DRV8874. The actual current of the motor is only 60mA, but the read current is 120mA. May I ask what causes it? The same current read by DRV8701 is correct, AIPROPI (μA/A)=450. 

Q2: When sleep is low, the customer uses an oscilloscope to measure OUT1 and OUT2, and there is a 50HZ 12V waveform output directly. May I ask why this happens?

Best regards,