Datasheet

OV
V - 4096
(lower) =
32
Cell Undervoltage/Overvoltage
OV
V - 2048
(upper) =
64
Cell Undervoltage/Overvoltage
bq2060A
www.ti.com SLUS500D –OCTOBER 2001– REVISED OCTOBER 2011
NO. OF SERIES CELLS LCC1, LCC0 CELL VOLTAGE INPUTS
NA 00 VCELL
4
= Cell Stack
VCELL
1
= Cell 1
2 01
VCELL
2
= Cell 2
VCELL
1
= Cell 1
3 10 VCELL
2
= Cell 2
VCELL
3
= Cell 3
VCELL
1
= Cell 1
VCELL
2
= Cell 2
4 11
VCELL
3
= Cell 3
VCELL
4
= 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. VCELL
4
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:
(25)
(26)
CELL UNDER/OVERVOLTAGE V
UV
CELL UNDER/OVERVOLTAGE V
OV
(upper nibble) (mV) (lower nibble) (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
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Product Folder Link(s): bq2060A