BQ2947_17 Datasheet, PDF (4/27 Pages) Texas Instruments – Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries with External Delay Capacitor

bq2947
SLUSB15F – SEPTEMBER 2012 – REVISED JANUARY 2017
5 Device Options
PART NUMBER
bq294700
bq294701
bq294702
bq294703
bq294704
bq294705
bq294706
bq294707
bq294708
bq294709 ⁽¹⁾
bq294711
bq2947
(1) Product Preview only
OVP (V)
4.350
4.250
4.300
4.325
4.400
4.450
4.550
4.225
4.500
4.160
4.220
3.850–4.60
OV HYSTERESIS
0.300
0.300
0.300
0.300
0.300
0.300
0.300
0.050
0.300
0.300
0.300
0–0.300
6 Pin Configuration and Functions
DSG Package
8-Pin WSON
Top View
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OUTPUT DRIVE
CMOS Active High
CMOS Active High
CMOS Active High
CMOS Active High
CMOS Active High
CMOS Active High
CMOS Active High
NCH Open Drain Active Low
CMOS Active High
CMOS Active High
CMOS Active High
CMOS Active High or Open Drain Active Low
1 _VDD
2 _V4
3 _V3
4 _V2
OUT ⁸
CD 7
VSS ⁶
V1 ⁵
PIN
NAME
NO.
CD
7
OUT
8
PWPD
9
V1
5
V2
4
V3
3
V4
2
VDD
1
VSS
6
Pin Functions
I/O
DESCRIPTION
OA
External capacitor connection for delay timer
OA
Analog Output drive for overvoltage fault signal. Active High or Open Drain Active Low
P
TI recommends connecting the exposed pad to VSS on PCB.
IA
Sense input for positive voltage of the lowest cell in the stack
IA
Sense input for positive voltage of the second cell from the bottom of the stack
IA
Sense input for positive voltage of the third cell from the bottom of the stack
IA
Sense input for positive voltage of the fourth cell from the bottom of the stack
P
Power supply input
P
Electrically connected to IC ground and negative terminal of the lowest cell in the stack
4
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