• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 493 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DRV8320: About Fault Status Register.

Kengo.Y
Guru 11175 points
Part Number: DRV8320

Hi team.

I use DRV8320S to do ESD testing.

The Fault states showed VGS_LC.

What kind of obstacle is VGS_LC?

Sincerely.
Kengo.

  • 0
    TI__Guru 65190 points

    Kengo,

    Per the datasheet:

    This means that the Low-Side FET for the C phase was not able to turn on before the TDRIVE time expired. The DRV or the FET may be damaged. 

    This fault can also mean that the low-side FET is turning on when it should be off or turning off while it should be on.

    Is this your own board or an EVM?

    Regards,

    -Adam

  • 0 in reply to Adam Sidelsky
    Guru 11175 points

    Adam.

    Thank you for your quick response.

    We evaluate with our application.

    I understand this fault states.

    Could you tell me about bellow my questions?

    1. When VGS_LC alert , is nFault output?

    2. If nFault is not output at VGS_LC alert, does not DRV & FET stop?

    And one more question.

    GDF can be disabled, when does it use?

    Sincerely.

    Kengo.

  • 0 in reply to Kengo.Y
    TI__Guru 65190 points

    Kengo,

    Please check this table in the datasheet:

    The VGS fault is listed above as GDF, as you can see, if DIS_GDF is 0, then the nFAULT pin will report.

    Some customers choose to disable GDF when they are using some strange dead time or independently controlling the HS and LS FET.

    There is no normal reason to disable GDF because without it there can be shoot-through.

    Regards,

    -Adam

  • 0 in reply to Adam Sidelsky
    Guru 11175 points

    Adam.

    Thank you.

    I understood.

    Sincerely.

    Kengo.