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DEVICE INFORMATION

2.1 AVAILABLE OPTIONS

2.2 PIN DIAGRAM

SE

VEN

TS

NC

PAUTH

AUTH

TOUT

SDATA

NC

SCLK

CELL+

CELL-

VCC

VSS

MRST

SRN

SRP

NC

NC

NC

bq27350

2.3 TERMINAL FUNCTIONS

bq27350

Single Cell Li-Ion Battery Manager

With Impedance Track Fuel Gauge Technology

SLUS754 – MARCH 2007

PACKAGE

–40

°C to 85°C

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

TERMINAL

DESCRIPTION

NAME

NO.

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

SCLK

10

I/O

Analog input pin connected to the internal coulomb-counter where SRP is connected to the CELL-

SRP

14

IA

side of the sense resistor

Analog input pin connected to the internal coulomb-counter where SRN is connected to the side of

SRN

15

IA

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

4, 9, 11,

NC

NA

Pins electrically connected internally, and should be left floating for normal operation.

12, 13

(1)

I/O = Digital Input/Output, IA = Analog Input, OA = Analog Output, P = Power Connection

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DEVICE INFORMATION

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