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BQ25886: BQ25886 Safety Timer

David chen
Expert 1200 points
Part Number: BQ25886

HI  Team:

1. My products work for more than 24 hours continuously.  the input is 5V,  BQ25886 Safety Timer  is 12hrs, when my product work more than 12hrs,the BQ25886 Safety Timer   fault,it will stop charge,The battery may not be fully charged  complete  ,   My circuit diagram is shown below.,(Bat+ GND)Direct to load,need to change to SYS to  load?  I think it also have the same problem! How to solve this problem?

2. in the datasheet   "The safety timer is reset for the following events: 1. Charging cycle stop and restart (toggle CE pin, or charged battery falls below recharge threshold).  ",How to explain "toggle CE pin"?

  • 0
    TI__Genius 10385 points

    David,

    1. To circumvent the charge safety timer you could periodically toggle /CE every hour. This would reset the charge safety timer.

    2. Toggle CE pin means to disable and re-enable charging. If the charge is disabled and re-enabled, the charger safety timer will reset and begin counting again.

    Thanks,

    Ricardo