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BQ27421-G1: parameter configuration issues in BQ27421-G1

Akshay A J
Prodigy 40 points
Part Number: BQ27421-G1

Hi,

I am using BQ27421-G1 with panasonic NCR18500A 2040mah battery. Spec of BQ27421-G1 mentiones about 4 design parameters that need to be configured in order to achieve accurate gauging of the target battery.

Out of which one is taper rate. According to spec,Taper Rate = Design Capacity / (0.1 * Taper Current).
I couldnt find the taper current value anywhere in BQ27421-G1 and NCR18500A datasheet. Can anyone help me to configure taper rate ?

Thanks.

  • 0
    TI__Guru* 76230 points
    hi Akshaya,
    You set your taper current to the value you want and that is what you use for the calculation. You don't enter taper current in the data memory, what you enter is the taper rate which is what you calculate from the taper current you chose.