BQ2084-V133 Datasheet, PDF (54/64 Pages) Texas Instruments – SBS v1.1-COMPLIANT GAS GAUGE FOR USE WITH THE bq29312

bq2084-V133
SLUS640A – JUNE 2005 – REVISED JUNE 2005
www.ti.com
SC
The SC bit enables learning cycle optimization for a Smart Charger or independent charge.
1 Learning cycle optimized for independent charger
0 Learning cycle optimized for Smart Charger
CEDV
The CEDV bit determines whether the bq2084-V133 implements automatic EDV compensation to calculate the
EDV0, EDV1, and EDV2 thresholds base on rate, temperature, and capacity. If the bit is cleared, the
bq2084-V133 uses the fixed values programmed in data flash for EDV0, EDV1, and EDV2. If the bit is set, the
bq2084-V133 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 Over Voltage is based on Voltage () or highest cell voltages.
0 Safety overvoltage based on Voltage ()
1 Safety overvoltage 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 bq2084-V133 compares
the pack voltage to RM and may adjust RM according to the values programmed in VOC25, VOC50, and
VOC75.
0 Continuous midrange corrections disabled
1 Continuous midrange corrections enabled
OTVC
The OTVC bit programs the bq2084-V133 to perform a midrange voltage one time after a device reset
0 One-time midrange correction disabled
1 One-time midrange correction enabled
Miscellaneous Configuration
Misc Configuration (DF 0x2a, high, and 0x2b, low) contains additional bit programmable features.
Misc Configuration (DF 0x2a, high)
b15
b14
b13
b12
b11
b10
b9
b8
IT
0
AFEDET
DS
OT
ECLED
1
VOD
IT
The IT bit configures the bq2084-V133 to use its internal temperature sensor. The DF constants 0xb5-0xc0
need to match the required thermistor on internal temperature sensor. See the Data Flash Settings for Internal
or External Temperature Sensor Table.
0 bq2084-V133 requires an external thermistor.
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