BQ2084DBTR-V150 Datasheet, PDF (13/69 Pages) Texas Instruments – SBS v1.1-COMPLIANT GAS GAUGE WITH LED DELAY

bq2084-V150
www.ti.com
SLUS758 – JUNE 2007
C (either 0%, 3%, or Battery Low % for EDV0, EDV1, and EDV2, respectively) and C0 are the
capacity-related EDV adjustment factors. C0 is programmed in EDV C0 Factor/EDV1 DF 0x97-98. C1 is
the desired residual battery capacity remaining at EDV0 (RM = 0). The C1 factor is stored in EDV C1
Factor DF 0xa0.
T is the current temperature in °K.
R0 × FTZ represents the resistance of a cell as a function of temperature and capacity.
FTZ = f ( R1, T0, T, C + C1, TC)
R0 is the first order rate dependency factor stored in EDV R0 Factor/EDV2 DF 0x99-0x9a.
T is the current temperature; C is the battery capacity relating to EDV0, EDV1, and EDV2.
R1 adjusts the variation of impedance with battery capacity. R1 is programmed in EDV R1 Rate Factor
DF 0x9d-0x9e.
T0 adjusts the variation of impedance with battery temperature. T0 is programmed in EDV T0 Rate
Factor DF 0x9b-0x9c.
TC adjusts the variation of impedance for cold temperatures (T < 23°C). TC is programmed in EDV TC
DF 0x9f.
Typical values for the EDV compensation factors, based on overall pack voltages for a Li-ion 3s2p 18650 pack,
are:
EMF = 11550/3
T0 = 4475
C0 = 235
C1 = 0
R0 = 5350/3
R1 = 250
TC = 3
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