BQ2063_15 Datasheet, PDF (51/60 Pages) Texas Instruments – SBS v1.1-COMPLIANT Li-ION GAS-GAUGE IC

Not Recommended For New Designs
bq2063
SBS v1.1ĆCOMPLIANT LiĆION GASĆGAUGE IC
WITH PROTECTOR INTERFACE
SLUS468E− MAY 2001 − REVISED APRIL 2002
PROGRAMMING INFORMATION
pack options (continued)
LLTF
The LLTF bit sets the temperature threshold used to disable the learning cycle (FCC update).
0 Sets the low temperature learning fault to 12C
1 Sets the low temperature learning fault to the value stored in MaxT_LowT
remaining time and capacity alarms
Remaining Time Alarm in EE 0x02-0x03 and Remaining Capacity Alarm in 0x04-0x05 set the alarm thresholds
used in the SMBus command codes 0x01 and 0x02, respectively. Remaining Time Alarm is stored in minutes
and Remaining Capacity Alarm in mAh or 10 mWh, depending on the Battery_Mode( ) setting.
secondary protection limits for Li-Ion
The cell undervoltage (VUV) and overvoltage (VOV) limits are programmed in Cell Undervoltage/Overvoltage
EE 0x4a according to the equations:
Cell
Overvoltage
(lower
nibble)
+
VOV–4096
32
(23)
Cell
Undervoltage
(upper
nibble)
+
VUV
* 2048
64
(24)
CELL UNDER/OVER
VOLTAGE (UPPER NIBBLE)
VUV
(mV)
CELL UNDER/OVER
VOLTAGE (LOWER NIBBLE)
VOV
(mV)
0
2048
0
4096
1
2112
1
4128
2
2176
2
4160
3
2240
3
4192
4
2304
4
4224
5
2368
5
4256
6
2432
6
4288
7
2496
7
4320
8
2560
8
4352
9
2624
9
4384
a
2688
a
4416
b
2752
b
4448
c
2816
c
4480
d
2880
d
4512
e
2944
e
4544
f
3008
f
4576
SAFETY Threshold
The Safety Voltage threshold (SOV) in mV is programmed in Safety Overvoltage EE 0x1f. It is stored as
Safety
Overvoltage
+
SOV
*
64
4096
(25)
The Safety Overtemperature (SOT) in °C is programmed in Safety Overtemperature EE 0x08. It is stored as
Safety Overtemperature + (94.5 * SOT) < 10
(26)
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