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DRV8912-Q1EVM: NPOR Bit is in HIGH status After Fault Recovery

Phan Dat
Prodigy 30 points
Part Number: DRV8912-Q1EVM

Tool/software:

Hi team

Is there any condition that causes the NPOR bit to stay HIGH after the device recovers from a fault?

Here’s what I did:

  1. Connected OUT1 to GND → Driver triggered OCP fault.
  2. Supplied 23V - 3A → Driver triggered OVP fault.
  3. After all conditions returned to normal, I cleared  faults using CLR_FLT.
    • OCP and OLV faults were cleared.
    • OUT1 turned back on, and VDD remained stable.

          --> However, the NPOR bit is still HIGH and cannot be cleared through the CONFIG_CTRL register.

Is there a specific reason why NPOR remains HIGH. I am currently using DRV8912_EVM for testing.

Best regards.

  • 0
    TI__Mastermind 44825 points

    Hi,

    Thank you for your question.

    Could you check register page of GUI? 

    regards

    Shinya

  • 0 in reply to Shinya Morita
    Prodigy 30 points

    Hi Shinva,

    I apologize for the delayed response. I was able to resolve the issue by latching the nSLEEP pin to high status again. However, I have another question I would appreciate your insight on.

    Is the OLD detection mechanism used for controlling the relay? I have connected the relay to the HS OUT1 signal, and the driver is reporting an OLD fault.

    I would be grateful for any guidance you can provide on this matter.

    Best regards

  • +1 in reply to Phan Dat
    TI__Mastermind 44825 points

    Hi

    Thank you for your question and update. Could you generate new E2E post for new question? This post will be referred in future, so would like to move new post for new question. Our team(including me) will support your new questions.

    I suggest to clarify how you connected load/relay .. Which OLD you are referring. In normal active OLD, if driving current is less than 9mA(typ), you will see OLD flag.FYI.