BQ2060A_15 Datasheet, PDF (47/61 Pages) Texas Instruments – SBS v1.1-Compliant Gas Gauge IC

bq2060A
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DeltaT
3
4
5
6
7
8
9
a
b
c
d
e
f
SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011
Table 11. (continued)
Δ(°C)
DeltaT_Time
t (s)
2.2
03
260
2.4
04
240
2.6
05
220
2.8
06
200
3.0
07
180
3.2
08
160
3.4
09
140
3.6
0a
120
3.8
0b
100
4.0
0c
80
4.2
0d
60
4.4
0e
40
4.6
0f
20
ΔT/Δt Holdoff Timer Programming
The holdoff timer is programmed in the lower nibble of Holdoff Time EE 0x4f. The holdoff time is 320 s minus 20
times the Holdoff Time value.
Holdoff Time
00
01
02
03
04
05
06
07
Holdoff Time (s)
320
300
280
260
240
220
200
180
Holdoff Time
08
09
0a
0b
0c
0d
0e
0f
Holdoff Time (s)
160
140
120
100
80
60
40
20
Current Taper Termination Characteristics
Two factors in the EEPROM set the current taper termination for Li-ion battery packs. The two coded locations
are Current Taper Qual Voltage EE 0x4f and Current Taper Threshold EE 0x4e. Current taper termination occurs
during charging when the pack voltage is above the charging voltage minus CELLV (mV) and the charging
current is below the threshold coded in Current Taper Threshold for at least 80 s.
Current
Taper
Qual
Voltage
+
CELLV
2
(23)
Current
TaperThreshhold
+
R_s i
0.5025
(24)
where i = the desired current termination threshold in mA, and R_S = VFC sense resistor in ohms.
PACK OPTIONS
Pack Configuration
Pack Configuration EE 0x3f contains bit-programmable features.
b7
DMODE
b6
SEAL
b5
CSYNC
b4
CEDV
b3
VCOR
b2
CHEM
b1
LCC1
b0
LCC0
Copyright © 2001–2011, Texas Instruments Incorporated
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