DRV8874: In PWM mode, the motor control side cannot apply capacitive filtering

Hi team,

Here's an issue from the customer may need your help:

At 20K, the PWM provides speed control of the DC motor (output current 1A), and the output can operate at normal speed. However, if a filter capacitor of 224 is added at the motor control side, the output square wave becomes a duty-cycle independent spike, causing the motor drive to not function properly.

The customer would like to know why the 8874 chip motor side cannot add filter capacitance,  is it related to current configuration mode? Could you help check this case? Thanks.

Best Regards,

Cherry