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BQ25890: Parameters between Fuel Gauge and Charger.

user3753091
Prodigy 40 points
Part Number: BQ25890
Other Parts Discussed in Thread: BQ27510-G3, BQ24190, BQ25601

Hi, 

I'm designing using bq25890, but also a fuel gauge (bq27510-g3). What parameters (if any) that I get from de gauge do i have to gave to the charger. Its possible to optimice charging that way?

I was wondering that because I've been working with bq2419x and bq27531 that connect themselfs by I2C.

If this isn't possible, I use I2C just to configure de charger and then I get the parameters directly from de fuel gauge? so both IC don't talk between them...?

Thanks a lot for you time, and apologies for my englis.

Nicolás.

  • 0
    TI__Guru**** 166486 points

    Nicolas,

    This charger and gauge are not designed to communicate with each other.  Most customers allow the gauge to more accurately monitor battery temperature, charge voltage and charge current.  Then they write host software to read that info from the gauge and write to the charger (with temp sense and termination disabled) when to start and stop charging.  Alternatively, you could allow the charger to control charge termination.  The thermistor can only be connected to either the charger or the gauge not both.  As you likely had to the do the with bq24190, you will need to use host software to write the charger's input current limit, maximum charge current and battery regulation voltage at a minimum.

  • 0 in reply to Jeff F
    Expert 1110 points
    Hi,

    Is there any pair charger-fuel gauge designed to work autonomously with a package different from BGA?

    If not, where I can found suggestions for management of the charger using the fuel gauge register information?

    Regards

    Andrés
  • 0 in reply to andres_dalmati
    TI__Guru**** 166486 points
    Andres,

    Unfortunately there are no non-BGA charger-gauge pairs. bq27542 is a non-BGA gauge. bq25890 and bq25601 are non-BGA chargers.