DRV8870: Current noise due to repeated forward and brake

Ishiwata-san,

That is an extremely low current.  What is the application/voltage rail?  Another device might be more suitable.  Are they trying to regulate at this current?  

Can you share any data?

Regards,

Ryan

Ryan-san,

Thank you for your reply.

Below is the waveform of the current noise.
IN2 repeats High and Low.

This causes overshoot and undershoot in the OUT1 current waveform.
I want to know the cause of this.
I think there are overshoots and undershoots during the blanking time.
I heard the minimum current value that can be detected.

Do you know the cause of the overshoot and undershoot of this current waveform?

Best Regards,
Ishiwata

Ishiwata-san,

The spikes appear to be occurring during the dead time state when FETs are transitioning.  See section 7.3.4 in the datasheet.  Is there a load connected?  Trying to understand why current is zero or maybe scale is too large to capture normal current thru the motor.  

Regards,

Ryan

Ryan-san,

Thank you for your answer.
I give feedback to the customer.
As for the current of the waveform, I think that almost no current is flowing.

Best Regards,
Ishiwata