• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 919 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.

TPS2553: About pull-up resistor of /FAULT pin

Tsukui Yusuke
Guru 21930 points
Part Number: TPS2553

Hi Team,

 

Our customer is evaluating the behavior of current limit.

Then, an assertion of /FAULT pin is around 750ms so it is slower than 7.5ms in the datasheet.

They use 10kohm for the pull-up resistor of /FAULT pin so it is lower than 100kohm in the datasheet.

Does this value affect an assertion of /FAULT?

If yes, could you please let us know the recommended minimum pull-up resistor value?



Best Regards,
Yusuke/Japan Disty

  • 0
    Guru 21930 points

    Hi Team,

     

    Could you please let us know the current status regarding this thread?

    It would be greatly appreciated if you could respond by tomorrow.

     

    Best Regards,

    Yusuke/Japan Disty

  • 0 in reply to Tsukui Yusuke
    TI__Expert 8980 points
    Hi, Yusuke-san,

    Sorry for late reply.
    I don't think the pull up resistor will influence it.
    One possible reason is Vin ripple of TPS2553. What's power supply of TPS2553? If it's a DC-DC, can you measure the Vin ripple. If the Vin ripple is big, please try to decrease the ripple and test again.
    If you want to validate whether the reason is ripple, you can use a DC source to supply Vin for TPS2553.

    Feel free to ask if any questions.

    Regards,
    Bob
  • 0 in reply to Tsukui Yusuke
    TI__Expert 8980 points
    Please ignore that I clicked 'TI thinks resolved', I clicked it by accident. I will keep following up this case.

    Regards,
    Bob