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DRV8837: DRV8837 OCP Question

Eddie Chou
Expert 5850 points
Part Number: DRV8837

Hi team,

Our customer test DRV8837 by increased load current, they find DRV8837 start to protection at 2.3A (temperature around 130deg ~ 150deg).

Customer's question are :

1. is protection caused by OCP or TSD?

2. From datashet, DRV8837 Overcurrent protection trip level is from 1.9A ~ 3.5A. the range is huge, is it possible change currnt protection level through HW or FW?

Thanks & Regards

Eddie Chou

  • 0
    TI__Guru** 114905 points

    Hi Eddie,

    Customer's question are :

    1. is protection caused by OCP or TSD?

    >> If the outputs disable and re-enable in approximately 1ms, it is OCP. If the time between disable and re-enable is much longer, it is TSD.

    2. From datashet, DRV8837 Overcurrent protection trip level is from 1.9A ~ 3.5A. the range is huge, is it possible change currnt protection level through HW or FW?

    >> It is not possible to change.

  • 0 in reply to Rick Duncan
    TI__Expert 5850 points
    Hi Duncan,
    Thanks, is that means DRV8837 current protection range tolerance is from 1.9A ~ 3.5A and customer not able to change.
    So it may happen with some devices driving current over 3A but DRV8837 still not protection, right?
    Thanks & Regards

    Eddie Chou
  • 0 in reply to Eddie Chou
    TI__Guru** 114905 points
    Hi Eddie,

    Correct, the OCP limit can vary from device to device.
  • 0 in reply to Rick Duncan
    TI__Expert 8985 points
    Hi Eddie,

    Did Rick's answer resolve your question?

    If so, please close this post by accepting the post is resolved in Rick's highlighted in yellow answer above me.

    Thanks!