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DRV8601: DRV8601 question

Prescott Siao
Intellectual 2220 points
Part Number: DRV8601

Hi Team,

My customer has a question about the DRV8601 setting.

IN1 input PWM Ferq 3KHz Duty 25% or, 75% or, 25%(5period), or 75%(5period) when EN ON

The vibration amplitude are the same (100%).

How do we to change the input PWM if we want 25% or 75% vibration amplitude?

Thanks.

Regards,

Prescott

  • 0
    TI__Expert 8721 points
    Hi Prescott,

    I assume this is driving an ERM. The motor will vibrate (mass will spin) in different directions based on the PWM signal with the zero crossing point being 50% duty cycle. Therefore, 25% and 75% duty cycle will drive the same vibration strength in opposite directions. For 25% and 75% strength, try drving the PWM at ~12.5% and ~37.5% duty cycle.