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BQ25895: Safety timer under watchdog expired

David Park
Expert 6710 points
Part Number: BQ25895

Hi,

Safety timer setting is set to default but it doesn't work after 25h.

With watchdog expire, all register is set to default setting. Does it reset safety timer as well?

My question is that safety timer restart with watchdog expire.

Watchdog timer flow chart in the datasheet, there is comment"Reset selective registers".

Could you let me know what "selective" means?

Thanks.

  • 0
    TI__Guru**** 166996 points
    David,

    In the REG07 table on d/s page 42, bits 1 and 2 are Reset by Watchdog expiration back to 12 hour default. When you say it doesn't work after 25hr, do you mean that the safety timer hasn't expired after 25 hours? If so, is it possible that the charger is in During input voltage, current or thermal regulation that has actived the 2X timer feature?