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DRV8835 - PWM controlling the DC motor

Kawai
Guru 19785 points
Other Parts Discussed in Thread: DRV8835

Hello Team,

Please allow me to ask you a simple question. When driving the DC motor with PWM using in IN/IN mode, I believe you should control the motor repeating FORWARD and COAST, am I correct ? Or, would it be better to repeat FORWARD and BRAKE ?

Best Regards,

Kawai

  • 0
    TI__Mastermind 21320 points

    Hi,

    This will depend on the actual application.

    The most common method for brushed DC motors is FORWARD/BRAKE. This will minimize the current ripple, but shorts the back-emf during the OFF period.

  • 0 in reply to Nicholas Oborny
    Guru 19785 points

    Hello Nicholas-san,

    Thank you for your support. Customer will use DRV8835 for camera Pan and Tilt application. Which control method would be the recommendation, FORWARD/BRAKE or FORWARD/COAST ?

    When PWM controlling with FORWARD/BRAKE, we are seeing large positive and negative current spikes. Is there a solution to reduce these current spikes ?


    It would be helpful if you could allow us to discuss off line, so that I could share customer measurement data.

    Best Regards,

    Kawai

  • 0 in reply to Kawai
    Guru 19785 points
    Hello Nicholas-san,

    Thank you for your support. I am closing this post.

    Best Regards,
    Kawai