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DRV8210EVM: How to adjust the maximum output current

Annie Liu
Genius 10295 points
Part Number: DRV8210EVM

Hi Team,

How does DRV8210DSG change the maximum output current in PWM mode?

Regards,

Annie

  • 0
    TI__Mastermind 44505 points

    Hi Annie,

    See below control table for PWM mode from the datasheet. For maximum output current in forward direction IN1 = 1 and IN2 = 0 to 100% PWM input duty cycle, 0 is 100% output duty cycle (maximum output) and 100% duty cycle is 0 output. It works with inverse PWM input.

    For reverse direction IN2 = 1 and IN1 = 0 to 100% PWM input duty cycle, 0 is 100% output duty cycle (maximum output) and 100% duty cycle is 0 output.

    When both IN1 and IN2 = 1 the device will do a slow decay with low side FETs.

    Regards, Murugavel

  • 0 in reply to Murugavel4637
    TI__Genius 10295 points

    Hi Murugavel,

    According to the data sheet, the peak output current of Iout is 1.76A. If customer wants to change the peak output current of DRV8210DSG, is it necessary to add a resistor between the OUT1 and OUT2 pins?

    Regards,

    Annie

  • 0 in reply to Annie Liu
    TI__Mastermind 44505 points

    Hi Annie,

    That is the peak output current the device can support without over heating. It is not the actual output current.

    The actual output current will be determined by the load and VM voltage. It will be VM/ DCR of the motor at startup & motor stall and (VM-VBEMF)/ DCR (DC resistance) while the motor is running. Not necessary to add a resistor between OUT1 and OUT2. 

    Regards, Murugavel