DRV8231A: Why the motor current of DRV8231A is different from DRV8870

Hi team,

We want to replace DRV8870 with DRV8231A. We were testing DRV8231A and found that motor current controlled by DRV8231A was smaller than that controlled by DRV8870 when the motor speed is relatively low.

Not much difference at high speed. Test result as attached picture.

Could you please tell me why motor current is different? And if there are some differences between DRV8231A and DRV8870 which we need to pay attention to.

Best regards,

Fengyu