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DRV8718-Q1: leakage current by SHx pin

Part Number: DRV8718-Q1

Dear expert,

Customer power down DRV8718 and all external related circuit except SHx still connect to 12V through a 20ohm resister.

At this case, there is 3mA flow from 12V into DRV8718 SHx. And there is voltage measured from below pins: 

PVDD: 0.1V

DRAIN: 12V

VCP: 10.8V

Is this phenomenon expected?

Is there any reliability concern for this case?

  • Ryan,

    Yes, there is a leakage path within the device.  If external FETs are connected to SHx as I am sure there are, there is also a path thru FET body diode to VDRAIN.  

    It is NOT a reliability concern.

    Regards,

    Ryan