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DRV8832 100% duty cycle

Doane Arnold
Intellectual 335 points
Other Parts Discussed in Thread: DRV8832

I'm controlling a DRV8832 from a 3.3V micro. The DRV8832 is running at 5.5VDC. I would like run the motor at a 100% duty cycle. Can VSET be driven by one of the I/O lines from the micro?

Thanks, Doane

  • 0
    TI__Mastermind 21320 points

    Hi Doane,

    To run the DRV8832 as a conventional H-bridge at 100% duty cycle. From datasheet.

    "Note that if the programmed output voltage is greater than the supply voltage, the device will operate at 100%
    duty cycle and the voltage regulation feature will be disabled. In this mode the device behaves as a conventional
    H-bridge driver."

    So you could connect VSET to VREF to drive at 5.14V or to a GPIO (3.3V) which will set some level high than the supply (entering the mode described above).