Iam using your breakout board for the drv8871 with a teensy. Depending on my pwm frequency (I tested 500hz- 50khz) the current and speed curve varies a lot. At higher frequencies the motor start spinning at around 40% duty cycle, which is quite late. For lower frequencies it will start early but reach max speed at around 65% duty cycle. Is there a recommended pwm frequency? With the motor drivers I worked so far, it was possible to get an more or less linear relationship between voltage and speed.
We do not manufacture a DRV8871 driver carrier. Could you possibly be talking about another one of our motor drivers?