BQ2085-V1P2 Datasheet, PDF (47/56 Pages) Texas Instruments – SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311

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bq2085−V1P2
SLUS590 − DECEMBER 2003
0 Broadcasts to host and charger enabled
1 Broadcasts to host and charger disabled
If the SM bit is set, modifications to bits in BatteryMode( ) do not re-enable broadcasts.
CC1−CC0
The CC bits configure the bq2085−V1P2 for the number of series cells in the battery pack.
0 Configures the bq2085−V1P2 for four series cells
1 Configures the bq2085−V1P2 for three series cells
Gauge Configuration
Gauge Configuration DF 0x29 contains bit-programmable features:
b7
b6
b5
0
CSYNC
SC
b4
CEDV
b3
EDVV
b2
OVSEL
b1
VCOR
b0
OTVC
CSYNC
In usual operation of the bq2085−V1P2, the CSYNC bit is set so that the coulomb counter is adjusted when
a fast charge termination is detected. In some applications, especially those where an externally controlled
charger is used, it may be desirable not to adjust the coulomb counter. In these cases clear the CSYNC bit.
0 The bq2085−V1P2 does not alter RM at the time of a valid charge termination.
1 The bq2085−V1P2 updates RM with a programmed percentage of FCC at a valid charger termination.
SC
The SC bit enables learning cycle optimization for a smart charger or independent charge.
0 Learning cycle optimized for independent charger
1 Learning cycle optimized for smart charger
CEDV
The CEDV bit determines whether the bq2085−V1P2 implements automatic EDV compensation to calculate
the EDV0, EDV1, and EDV2 thresholds base on rate, temperature, and capacity. If the bit is cleared, the
bq2085−V1P2 uses the fixed values programmed in data flash for EDV0, EDV1, and EDV2. If the bit is set, the
bq2085−V1P2 calculates EDV0, EDV1, and EDV2.
0 EDV compensation disabled
1 EDV compensation enabled
EDVV
The EDVV bit selects whether EDV termination is to be done with regard to voltage or the lowest single-cell
voltage.
0 EDV conditions determined on the basis of the lowest single-cell voltage
1 EDV conditions determined on the basis of Voltage( )
OVSEL
The OVSEL bit determines if safety overvoltage is based on pack or highest cell voltages.
0 Safety over voltage based on pack voltage
1 Safety over voltage based on highest cell voltage multiplied by the number of cells and then
compared to the safety voltage
VCOR
The VCOR bit enables the midrange voltage correction algorithm. When it is set, the bq2085−V1P2 compares
the pack voltage to RM and may adjust RM according to the values programmed in VOC25, VOC50, and
VOC75.
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