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DRV8833: About PWM frequency to input pin

Y.Ottey
Mastermind 6145 points
Part Number: DRV8833

Dear all,

Would you mind if you ask about value of PWM frequency in DRV8833.

Our customer is considering to input the input signal at motor startup from an external microcomputer to the input terminal by PWM.

They would like to know the range of PWM frequency that can be input to the input terminal.

How many PWM frequencies can be input to each input terminal?

 I would appreciate it if you could get back to me right away.

Best Regards,

Y.Ottey

  • 0
    TI__Guru** 114905 points
    Hi Y.Ottey,

    If desired, the recommended max PWM input frequency is 100kHz. Most motors use a PWM frequency less than 50kHz.

    Typically, there is no need to PWM the input. The inputs can be set to a static value and the internal circuitry will limit the current using the internal PWM generator.

    Also the internal PWM circuitry may interfere with PWM'ing the inputs. This is because the internal PWM circuitry is limiting the current.