BQ2060A_15 Datasheet, PDF (49/61 Pages) Texas Instruments – SBS v1.1-Compliant Gas Gauge IC

bq2060A
www.ti.com
SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011
NO. OF SERIES CELLS
NA
2
3
4
LCC1, LCC0
00
01
10
11
CELL VOLTAGE INPUTS
VCELL₄= Cell Stack
VCELL₁ = Cell 1
VCELL₂ = Cell 2
VCELL₁= Cell 1
VCELL₂= Cell 2
VCELL₃= Cell 3
VCELL₁= Cell 1
VCELL₂= Cell 2
VCELL₃= Cell 3
VCELL₄= Cell 4
For Li-ion packs with individual measurements, LCC0 and LCC1 define the number of series elements and their
voltage measurement inputs. In each case (2, 3, or 4), the bq2060A uses the highest numbered cell voltage input
to measure the pack voltage measurement as returned with Voltage(). For nickel chemistries or Li-ion without
single-cell measurements, LCC0 and LCC1 must be set to 00. VCELL₄ is the pack voltage input for this
programming.
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.
Secondary Protection Limits for Li-Ion
The cell undervoltage (V_UV) and overvoltage (V_OV) limits are programmed in Cell Undervoltage/Over Voltage EE
0x4a according to the equations:
Cell Undervoltage/Overvoltage (lower) = ^{VOV - 4096}
32
(25)
Cell Undervoltage/Overvoltage (upper) = ^{VOV - 2048}
64
(26)
CELL UNDER/OVERVOLTAGE
(upper nibble)
0
1
2
3
4
5
6
7
8
9
a
b
c
d
e
f
V_UV
(mV)
2048
2112
2176
2240
2304
2368
2432
2496
2560
2624
2688
2752
2816
2880
2944
3008
CELL UNDER/OVERVOLTAGE
(lower nibble)
0
1
2
3
4
5
6
7
8
9
a
b
c
d
e
f
V_OV
(mV)
4096
4128
4160
4192
4224
4256
4288
4320
4352
4384
4416
4448
4480
4512
4544
4576
Copyright © 2001–2011, Texas Instruments Incorporated
Product Folder Link(s): bq2060A
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