BQ27350 Datasheet, PDF (3/33 Pages) Texas Instruments – Single Cell Li-Ion Battery Manager With Impedance Track Fuel Gauge Technology

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2 DEVICE INFORMATION
bq27350
Single Cell Li-Ion Battery Manager
With Impedance Track Fuel Gauge Technology
SLUS754 – MARCH 2007
2.1 AVAILABLE OPTIONS
T_A
–40°C to 85°C
PACKAGE
TSSOP (PW)⁽¹⁾
bq27350PW
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
2.2 PIN DIAGRAM
SE
VEN
TS
NC
PAUTH
AUTH
TOUT
SDATA
NC
SCLK
bq27350
CELL+
CELL-
VCC
VSS
MRST
SRN
SRP
NC
NC
NC
2.3 TERMINAL FUNCTIONS
TERMINAL
NAME
NO.
I/O ⁽¹⁾
DESCRIPTION
SE
1
I/O System enable. Open-drain output for controlling LDO enable (active low).
VEN
2
O
Voltage divider enable
TS
3
IA
Thermistor measurement input if external thermistor selected
PAUTH
5
P
Positive supply line for powering optional bq26100
AUTH
6
IO
Signal line for communicating with optional bq26100
TOUT
7
OA Thermistor power output
SDATA
8
I/O
I²C Interface bidirectional data line (open-drain)
SCLK
10
I/O
I²C Interface clock line (open-drain)
SRP
14
IA
Analog input pin connected to the internal coulomb-counter where SRP is connected to the CELL-
side of the sense resistor
SRN
15
IA
Analog input pin connected to the internal coulomb-counter where SRN is connected to the side of
the sense resistor nearest PACK–
MRST
16
I
Master reset of the bq27350
VSS
17
P
Power ground of the IC
VCC
18
P
Power supply of the IC
CELL–
19
IA
Negative node of differential cell measurement Input
CELL+
20
IA
Positive node of differential cell measurement Input
NC
4, 9, 11,
12, 13
NA Pins electrically connected internally, and should be left floating for normal operation.
(1) I/O = Digital Input/Output, IA = Analog Input, OA = Analog Output, P = Power Connection
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DEVICE INFORMATION
3