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DRV8811 I Sense Capacitors

Charles Gervasi
Expert 2270 points

What is the purpose of putting capacitors on the on the ISENx lines:

This is from the eval board schematic.  I'm trying to work out the purpose of C6, which goes from ISENx to ground.

Thanks!!

  • 0
    TI__Intellectual 1100 points

    Charles -

    A cap can be placed here to help lower noise on the Isense pin.  But it is not required, and we typically do not recommend one be used.  There is an internal blanking time which takes care of the spike that occurs when the winding is first energized.