BQ27541 Datasheet, PDF (20/38 Pages) Texas Instruments – Single Cell Li-Ion Battery Fuel Gauge for Battery Pack Integration

bq27541
SLUS861 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com
DATA FLASH SUMMARY
Table 7 summarizes the data flash locations available to the user, including their default, minimum, and
maximum values.
Class
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
System Data
System Data
System Data
Configuration
Configuration
Configuration
Configuration
Configuration
Configuration
Gas Gauging
Gas Gauging
Gas Gauging
Gas Gauging
Gas Gauging
Gas Gauging
Subclass
ID
2
2
2
2
2
2
32
32
32
34
34
34
34
36
36
36
36
36
36
36
36
48
48
48
48
48
48
48
49
49
49
49
58
58
58
64
68
68
68
68
68
80
80
80
80
80
80
Subclass
Safety
Safety
Safety
Safety
Safety
Safety
Charge Inhibit Config
Charge Inhibit Config
Charge Inhibit Config
Charge
Charge
Charge
Charge
Charge Termination
Charge Termination
Charge Termination
Charge Termination
Charge Termination
Charge Termination
Charge Termination
Charge Termination
Data
Data
Data
Data
Data
Data
Data
Discharge
Discharge
Discharge
Discharge
Manufacturer Info
Manufacturer Info
Manufacturer Info
Registers
Power
Power
Power
Power
Power
IT Cfg
IT Cfg
IT Cfg
IT Cfg
IT Cfg
IT Cfg
Table 7. Data Flash Summary
Offset
0
2
3
5
7
8
Name
OT Chg
OT Chg Time
OT Chg Recovery
OT Dsg
OT Dsg Time
OT Dsg Recovery
Data
Type
I2
U1
I2
I2
U1
I2
Min
Value
0
0
0
0
0
0
Max Value
1200
60
1200
1200
60
1200
0
Charge Inhibit Temp Low
I2
–400
1200
2
Charge Inhibit Temp High
I2
–400
1200
4
Temp Hys
I2
0
100
2
Charging Voltage
I2
0
20,000
4
Delta Temperature
I2
0
500
6
Suspend Temperature Low
I2
–400
1200
8
Suspend Temperature High
I2
–400
1200
2
Taper Current
I2
0
4
Minimum Taper Charge
I2
0
6
Taper Voltage
I2
0
8
Current Taper Window
U1
0
9
Terminate Charge Alarm Set %
I1
-1
10
Terminate Charge Alarm Clear %
I1
-1
11
Full Charge Set %
I1
-1
12
Full Charge Clear %
I1
-1
1000
1000
1000
60
100
100
100
100
0
Remaining Capacity Alarm
I2
0
70
8
Initial Standby Current
I1
–256
0
9
Initial Max Load Current
I2
–32,767
0
17
Cycle Count
U2
0
65535
19
CC Threshold
I2
100
32,767
23
Design Capacity
I2
0
65,535
39
Device Name
S8
x
x
0
SOC1 Set Threshold
U1
0
255
1
SOC1 Clear
U1
0
255
2
SOCF Set Threshold
U1
0
255
3
SOCF Clear
U1
0
255
0–31
32–63
64–95
Block A [0–31]
Block B [0–31]
Block C [0–31]
H1
0x00
0xff
H1
0x00
0xff
H1
0x00
0xff
0
Pack Configuration
H2
0x0000
0xffff
0
Flash Update OK Voltage
I2
0
4200
7
Sleep Current
I2
0
100
16
Hibernate Current
U2
0
700
18
Hibernate Voltage
U2
2400
3000
20
Full Sleep Wait Time
U1
0
255
0
Load Select
U1
0
255
1
Load Mode
U1
0
255
48
Terminate Voltage
I2
2800
3700
65
User Rate-mW
I2
0
14,000
67
Reserve Cap-mAh
I2
0
9000
69
Reserve Cap-mWh
I2
0
14,000
Default Value
Units
550
2
500
600
2
550
0
450
50
4200
50
-50
550
100
25
100
40
99
95
100
98
100
–10
–500
0
900
1000
bq27541
150
175
75
100
0x00
0x00
0x00
0x0135
2800
10
8
2550
0
1
0
3000
0
0
0
0.1°C
s
0.1°C
0.1°C
s
0.1°C
0.1°C
0.1°C
0.1°C
mV
0.1°C
0.1°C
0.1°C
mA
0.01mAh
mV
s
%
%
%
%
mAh
mA
mA
Count
mAh
mAh
–
mAh
mAh
mAh
mAh
–
–
–
–
mV
mA
mA
mV
s
–
–
mV
mW
mAh
mWh
20
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