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BQ40Z50: Can customer use watchdog function

Ryker She
Expert 4270 points
Part Number: BQ40Z50

Tool/software:

Hi expert,

My customer want to know if they can use the watchdog function of BQ40Z50R5? And what's the potential risk if they use? Please help to provide some insight or documents to prove. We noticed there isn't customer to use watchdog of BQ40Z50. Thanks.

Best Regards,

Ryker

  • 0
    TI__Mastermind 25225 points

    Hello,

    This question has been assigned and will be reviewed when possible.

    Thank you,
    Alan

  • 0 in reply to Alan Frias
    TI__Expert 4270 points

    Hi Alan,

    Could you help to update this question? It's critical for customer. Thanks.

    Best Regards,

    Ryker

  • 0 in reply to Ryker She
    TI__Prodigy 682 points

    Hello Ryker,

    The watchdog is feature which has been used by customers before. Please see the following e2e threads:

    e2e

    Essentially, the watchdog requires the host to constantly communicate back to the gauge to continue the operations of the FETs. If host freezes or stops communicating for whatever reasons, then it will stop communicating back to the gauge, and the gauge will eventually shutdown the FETs. This feature basically assumes if the host has any issues for whatever reason, then it is better to disconnect the battery from the system to prevent further damage to the system since the host is probably compromised already.