• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 63 subscribers
  • Views 224 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.

TPS7B63-Q1: Extend WD time longer than 500 ms

Clark Kinnaird
Expert 3915 points
Part Number: TPS7B63-Q1

Can I choose a larger resistance and extend the watchdog time to more than 500 ms?

  • 0
    TI__Mastermind 23361 points

    Hi Clark, 

    Technically, yes, a higher than 200K Ohms resistor could give you a higher watchdog clock cycle, but the tolerance of the cycle will get higher than 15% as well. As you can see, we only have tolerance data up to 500ms for the WD timer. How much does your customer plan to set it to?

    Regards, 
    Jason Song

  • 0 in reply to Jason Song
    TI__Expert 3915 points

    Jason,

    In this application, they would use the watchdog to wake up part of the system about every 2 seconds, unless the WD was reset.  I think the expanded tolerance would be acceptable; precise timing is not a requirement.

    Thanks!

  • 0 in reply to Clark Kinnaird
    TI__Mastermind 23361 points

    Hi Clark, 

    Understood, thanks for providing the update. I would advise the customer to try their usage case with the EVM and to see if the expanded tolerance would meet their requirement. If you need additional assistance, please don't hesitate to contact me back. 

    Regards, 

    Jason Song