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BQ25896: Battery depletion falling threshold (V_BATDPL) is too low

wenzel reichmuth
Prodigy 40 points
Part Number: BQ25896

Dear E2E Community,

In the Datasheet p.8 the Battery depletion falling threshold (V_BATDPL) is described by

Min: 2.15V, Max: 2.5V

Does this mean it is configurable in the registers? I cannot find anything like this in the register description.

Anyway I guess a max of 2.5V is still too low. Most of the LiIon/LiPo Batteries i found and also the one I use are limited to 3.0V discharge threshold.

I had problems with deep discharged batteries. Is there any configuration which prevents this?

Thanks in advance

  • 0
    TI__Guru**** 166176 points
    Hi Wenzel,

    VBAT(DPL) is the threshold below which OTG mode will automatically shutdown. VBATUVLO = 2.3V is the voltage below which the charger can no longer reliably supplement SYS when there is no VBUS. These thresholds are not user configurable. We have some customers who want to drain their batteries down this low but most have a separate battery protector circuits that open when the battery voltage drops below a much higher voltage, like 2.8-3.0V.

    Regards,
    Jeff