BQ27541 Datasheet, PDF (21/38 Pages) Texas Instruments – Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration

bq27541
www.ti.com ........................................................................................................................................................................................... SLUS861 – DECEMBER 2008
Class
Gas Gauging
Gas Gauging
Gas Gauging
Gas Gauging
Gas Gauging
Gas Gauging
Subclass
ID
81
81
81
81
81
81
Table 7. Data Flash Summary (continued)
Subclass
Current Thresholds
Current Thresholds
Current Thresholds
Current Thresholds
Current Thresholds
Current Thresholds
Offset
0
2
4
6
8
9
Name
Dsg Current Threshold
Chg Current Threshold
Quit Current
Dsg Relax Time
Chg Relax Time
Quit Relax Time
Data
Type
I2
I2
I2
U2
U1
U1
Min
Value
0
0
0
0
0
0
Max Value
2000
2000
1000
8191
255
63
Gas Gauging
82
Gas Gauging
82
Gas Gauging
82
Gas Gauging
82
Gas Gauging
82
Gas Gauging
82
State
State
State
State
State
State
0
Qmax Cell0
I2
0
32,767
2
Qmax
I2
0
32,767
4
Cycle Count
U2
0
65,535
6
Update Status
H1
0x00
0x03
9
Avg I Last Run
I2
–32,768
32,767
11
Avg P Last Run
I2
–32,768
32,767
Ra Tables
88
Ra Tables
89
Pack Ra0
Pack Ra0x
0–31
0–31
See ⁽¹⁾
Calibration
104
Calibration
104
Calibration
104
Calibration
104
Calibration
104
Calibration
104
Calibration
104
Data
Data
Data
Data
Data
Data
Data
0
CC Gain
F4 ⁽²⁾
0.1
47
4
CC Delta
F4 ⁽²⁾
4.7
188
8
CC Offset
I2
–2.4
24
10
Board Offset
I1
–128
127
11
Int Temp Offset
I1
–128
127
12
Ext Temp Offset
I1
–128
127
13
Pack V Offset
I1
–128
127
Calibration
107
Current
1
Deadband
U1
0
255
Security
112
Security
112
Security
112
Security
112
Security
112
Security
112
Codes
Codes
Codes
Codes
Codes
Codes
0
Unseal Key
H4
0x0000
0xffffffff
4
Full-Access Key
H4
0x0000
0xffffffff
8
Authentication Key 3
H4
0x0000
0xffffffff
12
Authentication Key 2
H4
0x0000
0xffffffff
16
Authentication Key 1
H4
0x0000
0xffffffff
20
Authentication Key 0
H4
0x0000
0xffffffff
(1) Encoded battery profile information created by bqEasy software
(2) Not IEEE floating point
(3) Display as the value EVSW displayed. Data Flash value is different.
Default Value
60
75
40
1800
60
1
1000
1500
0
0x00
-299
-1131
10 ⁽³⁾
10⁽³⁾
–0.088 ⁽³⁾
0
0
0
0
5
0x36720414
0xffffffff
0x01234567
89ABCDEF
FEDCBA98
76543210
Units
mA
mA
mA
s
s
s
mAh
mAh
–
–
mA
mAh
mΩ
mΩ
mV
mV
0.1°C
0.1°C
mV
mA
–
–
–
–
–
–
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