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DRV8837C: The behavior on the forced operation of DRV8837C

yoshiki hasebe
Mastermind 6385 points
Part Number: DRV8837C

Dear Sirs,

My customer asked us about The behavior on the forced operation of DRV8837C.

In case the DRV 8837C is automatically operated in one direction and forcibly stopped from the outside and moved manually in the opposite direction.

Q1: Does OCP work?

Q2: If it does not work, is there any other protection function?

Please let me know above questions.

Best Regards,

Y.Hasebe

  • 0
    TI__Guru** 114905 points
    Hi Hasebe-san,

    In case the DRV 8837C is automatically operated in one direction and forcibly stopped from the outside and moved manually in the opposite direction.

    Q1: Does OCP work?

    >> If the outputs remain enabled and the current exceeds the overcurrent level, OCP will work. Please note the OCP level is a minimum. The OCP may activate at higher currents.

    >> Also please note the device will re-enable the outputs approximately 1ms later.

    Q2: If it does not work, is there any other protection function?

    >> If the device remain enabled, thermal shutdown will disable the outputs until the device temperature falls to a safe level. The outputs will then be re-enabled.
  • 0 in reply to Rick Duncan
    Mastermind 6385 points

    Hello Rick-san,

    Thank you for your reply.

    I have additional questions on Q1.
    I can understand your answer when the motor is in one direction.
    However, if the motor is forced to move in the reverse direction forcibly from the outside while the motor is operating automatically,the current will flow in the opposite direction to the direction in which it was operating automatically.

    Will OCP work also in this case?

    My customers use motors to operate automatically even though they are forced to manually move in the opposite direction.
    I have been asked by them whether there is a protective function at this time.

    Best Regards,

    Y.Hasebe