BQ27741-G1_14 Datasheet, PDF (2/39 Pages) Texas Instruments – Single Cell Li-Ion Battery Fuel Gauge with Integrated Protection

bq27741-G1
SLUSBF2 – JULY 2013
DEVICE INFORMATION
bq27741 PIN DIAGRAM
(TOP VIEW)
CSP-15
(TOP VIEW)
CSP-15
(BOTTOM VIEW)
A3 B3 C3 D3 E3
E3 D3 C3 B3 A3
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A2 B2 C2 D2 E2
E2 D2 C2 B2 A2
A1 B1 C1 D1 E1
E1 D1 C1 B1 A1
BOTTOM VIEW
SCL
RC2
SDA
PACKP
DSG ₃
TS
HDQ
BAT
RA0
CHG 2
REG25
VSS
VPWR
SRN
SRP 1
E
D
C
B
A
TERMINAL
PIN
NAME
A1
SRP
A2
CHG
A3
DSG
B1
SRN
B2
RA0
B3
PACKP
C1
VPWR
C2
BAT
C3
SDA
D1
VSS
D2
HDQ
D3
RC2
E1
REG25
E2
TS
E3
SCL
TYPE ⁽¹⁾
Table 1. Terminal Functions
DESCRIPTION
IA
Analog input pin connected to the internal coulomb counter where SRP is nearest the PACK+
connection. Connect to sense resistor.
O
External high side N-channel charge FET driver.
O
External high side N-channel discharge FET driver.
IA
Analog input pin connected to the internal coulomb counter where SRN is nearest the CELL+
connection. Connect to sense resistor.
IO
General Purpose IO. Open-drain I/O.
IA
Pack voltage measurement input for protector operation.
P
Power input. Decouple with 0.1-µF ceramic capacitor to V_SS.
IA
Cell-voltage measurement input. ADC input.
IO
Slave I²C serial communications data line for communication with system. Open-drain I/O. Use with
10-kΩ pullup resistor (typical).
P
Device ground.
IO
HDQ serial communications line. Open-drain.
IO
General purpose IO. Push-pull output.
P
Regulator output and bq27741-G1 processor power. Decouple with 1.0-µF ceramic capacitor to V_SS.
IA
Pack thermistor voltage sense (use 103AT-type thermistor). ADC input.
IO
Slave I²C serial communications clock input line for communication with system. Use with 10-kΩ
pullup resistor (typical).
(1) IO = Digital input-output, IA = Analog input, P = Power connection, O = Output
2
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