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BQ25120: Can we real time to read BQ25120 registers?

Chen Bogey8
Mastermind 9990 points
Part Number: BQ25120


Hi Sir 

1.Can we real time to read BQ25120 registers?

Register value seems no change when when we charger battery. until we removed battery, then register value have change.

2.Form table 2, TABLE Remaining capacity is wide, is there having suggestion to let VBMON value is linear(0% ~100%)?

                                         Bogey

  • 0
    TI__Genius 12485 points
    Hi Bogey Chen,

    You can access the registers anytime as long as either VBAT or VIN is present. What you are seeing is because your /CD pin is low. You will need to connect the /CD pin to high to read registers when you are on VBAT only mode.

    The VBMON is comparator based but if you are looking for 0-100%, you can come up with a look up table based on the VBATREG setting.

    When you are reading the VBMON, an idea is to disable charger (using /CD pin) >lower the VBREG settings > scale and read the new percentage.

    Regards,
    gautham