DRV8601: How to control the motor operating current

Cherry Zhou

Mastermind 22235 points

Part Number: DRV8601

Hi Team,

The customer would like to know how to control the operating current of the motor. Thanks.

Best Regards,

Cherry

9 months ago

0 Jeff McPherson 9 months ago

TI__Mastermind 28340 points

Hi Cherry,

You could use a series resistor to limit the output current, but there's no way internal to the device to control the current. The output current will be a function of the PWM signal given to the device versus the load attached.

Best regards,
Jeff McPherson

0 Cherry Zhou 9 months ago in reply to Jeff McPherson

TI__Mastermind 22235 points

Hi Jeff,

Thank you for the support!

Could you help tell what are the function relationships? Is the voltage at the output divided by the resistance of the motor to get the current magnitude?

Thanks and regards,

Cherry

0 Jeff McPherson 9 months ago in reply to Cherry Zhou

TI__Mastermind 28340 points

Hi Cherry,

Yes that's correct. So adding a resistor is effectively creating a voltage divider with the load. The power delivered at the load will be less, but that's unavoidable.

Best regards,
Jeff McPherson

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DRV8601: How to control the motor operating current