BQ2083-V1P2 Datasheet, PDF (9/55 Pages) Texas Instruments – SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bp29311

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Gas Gauge Operation
bq2083-V1P2
SLUS573 − JULY 2003
LABEL
Misc. Config
TS Const1 A3
TS Const2 A2
TS Const3 A1
TS Const4 A0
Min Temp AD
Max Temp
Table 1. Data Flash Settings for Internal or External Temperature Sensor
LOCATION
Dec (Hex)
INTERNAL TEMP SENSOR SETTING
Dec (Hex)
EXTERNAL TEMP SENSOR SETTING
Dec (Hex)
42 (0x2a)
Bit 7 = 1
Bit 7 = 0
164/5 (0xa4/5)
0 (0x0000)
−28285 (0x9183)
166/7 (0xa6/7)
0 (0x0000)
20848 (0x5170)
168/9 (0xa8/9)
−11136 (0xd480)
−7537 (0xe28f)
170/1 (0xaa/b)
5734 (0x1666)
4012 (0x0fac)
172/3 (0xac/d)
0 (0x0000)
0 (0x000)
174/5 (0xae/f)
5734 (0x1666)
4012 (0x0fac)
If AD < Min Temp AD then Temp = Max Temp
else
Temp = ((A3 × AD × 2^−16 +A2) × AD × 2^−16 + A1) × AD × 2^−16 + A0)
General
The operational overview in Figure 3 illustrates the gas gauge operation of the bq2083−V1P2. Table 3 describes the
bq2083−V1P2 registers.
Inputs
Charge
Current
Battery Electronics
Load Estimate
Discharge
Current
Self-Discharge
Timer
Charge
Efficiency
Compensation
Temperature
Compensation
Main Counters and
Capacity Reference (FCC)
−−−
+
Remaining
Capacity
≤
(RM)
Full
Charge
Capacity
(FCC)
+++
Qualified
Transfer
Discharge
Count
Register
(DCR)
Temperature, Other Data
Outputs
Chip-Controlled Two-Wire
Available Charge Serial Port
LED Display
Figure 3. bq2083−V1P2 Operational Overview
The bq2083−V1P2 accumulates a measure of charge and discharge currents and estimates self-discharge of the
battery. The bq2083−V1P2 compensates the charge current measurement for temperature and state-of-charge of
the battery. The bq2083−V1P2 also adjusts the self-discharge estimation based on temperature.
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