BQ27531-G1 Datasheet, PDF (4/21 Pages) Texas Instruments – Battery Management Unit Impedance Track Fuel Gauge for Use With the bq2419x Charger Controller

bq27531-G1
SLUSBE7 – MARCH 2013
PIN ASSIGNMENT AND PACKAGE DIMENSIONS
(TOP VIEW)
(BOTTOM VIEW)
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A3
B3
C3
D3
E3
xxxx ^E
A2
B2
A1
B1
Pin A1
C2
C1
D2
D1
E2
E1
Index Area
D
DIM
MIN
D
2580
E
1926
TYP
2610
1956
MAX
2640
1986
UNITS
m
E3
D3
C3
B3
A3
E2
D2
C2
B2
A2
E1
D1
C1
B1
A1
PIN
NAME
NO.
SRP
A1
SRN
V_SS
V_CC
REGIN
SOC_INT
BSCL
CE
BAT
SCL
B1
C1, C2
D1
E1
A2
B2
D2
E2
A3
SDA
B3
BSDA
C3
TS
D3
BI/TOUT
E3
Table 1. PIN FUNCTIONS
TYPE
IA
IA
P
P
P
I/O
O
I
I
I
I/O
I/O
IA
I/O
DESCRIPTION
Analog input pin connected to the internal coulomb counter where SRP is nearest the PACK– connection. Connect to
5-mΩ to 20-mΩ sense resistor.
Analog input pin connected to the internal coulomb counter where SRN is nearest the Vss connection. Connect to 5-
mΩ to 20-mΩ sense resistor.
Device ground
Regulator output and bq27531-G1 power. Decouple with 1μF ceramic capacitor to Vss.
Regulator input. Decouple with 0.1μF ceramic capacitor to Vss.
SOC state interrupts output. Generates a pulse as described in bq27531-G1 Technical Reference Manual. Open
drain output.
Battery Charger clock output line for chipset communication. Push-pull output.
Chip Enable. Internal LDO is disconnected from REGIN when driven low. Note: CE has an internal ESD protection
diode connected to REGIN. Recommend maintaining V_CE ≤ V_REGIN under all conditions.
Cell-voltage measurement input. ADC input. Recommend 4.8V maximum for conversion accuracy.
Slave I²C serial communications clock input line for communication with system (Master). Open-drain I/O. Use with
10kΩ pull-up resistor (typical).
Slave I²C serial communications data line for communication with system (Master). Open-drain I/O. Use with 10kΩ
pull-up resistor (typical).
Battery Charger data line for chipset communication. Push-pull output.
Pack thermistor voltage sense (use 103AT-type thermistor). ADC input.
Battery-insertion detection input. Power pin for pack thermistor network. Thermistor-multiplexer control pin. Use with
pull-up resistor >1MΩ (1.8 MΩ typical).
4
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