DRV8837: DRV8837 OCP Question

Eddie Chou

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

over 6 years ago

0 Rick Duncan over 6 years ago

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 Eddie Chou over 6 years ago in reply to Rick Duncan

TI__Expert 4710 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 Rick Duncan over 6 years ago in reply to Eddie Chou

TI__Guru** 114905 points

Hi Eddie,

Correct, the OCP limit can vary from device to device.

0 Hector Hernandez Luque over 6 years ago in reply to Rick Duncan

TI__Expert 8980 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!

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DRV8837: DRV8837 OCP Question