I am using the DRV8432EVM to power 2 DC motors in dual full bridge mode with a single PWM input(PWM_A). I have the motor hooked up accross OUT_A and OUT_B as suggested by the datasheet Page 15 Figure 8. The problem is that instead of a 12V pwm signal(0Vlo to 12Vhi) in either the positive or negative region I get a 24V pwm signal(-12Vlo to +12Vhi) giving me an average voltage of 0 and hence no power. The datasheet does does say that in this mode PWM_B complements PWM_A... I don't see the usefullness of this mode if this is the recommended circuit. I am thinking I need to switch to dual full bridge with 2PWM and leave one of the two outputs at 0% duty cycle and just drive one at a time. Could someone please help shed some light on this situation please. I am confusing myself trying to figure this out.
Thanks in advance,
Shane