Other Parts Discussed in Thread: DRV8871
I have a DRV8871 Evaluation board and I am using external PWM and was wondering if the full 0% to 100% duty cycle range can be used if the PWM frequency is 100khz.
The reason I ask this is to know whether or not the internal charge pump has any special requirements.
I am using a sinusoidal PWM, with INA1 set high and sinusoidally pulsing the INA2 for the positive half cycle and INA2 set high and sinusoidally pulsing INA1 for the negative half cycle.
I am seeing a 1Mhz chopping of the output current for part of the negative cycle, and was wondering where this originates from, I don't think it is the current limit as the current is only +/- 0.25Amp.
Any thoughts welcome,