DRV8251: low frequency at IN1 and IN2

Tool/software:

Hello,

I am using DRV8251A to drive my resistive load. My input PWM has very low frequency = 50Hz.

I noticed that the DRV8251A does not output anything at this frequency, at 1000Hz input frequency, it outputs constant 10% at 35kHz regardless of input signal.

Is this intended behaviour? Because in the data sheet it says IN1 and IN2 can go from 0 -> 200kHz.

This is my schematic for your reference:

• R2 is not fitted
• load is connected between OUT1 and OUT2. Rload = 100Ohm

What is the difference between DRV8251 and DRV8251A if I may ask?