BQ27350PWR datasheet(2/33 Pages) TI

Part #	BQ27350PWR

Description	Single Cell Li-Ion Battery Manager With Impedance Track Fuel Gauge Technology

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Contents

bq27350

Single Cell Li-Ion Battery Manager

With Impedance Track Fuel Gauge Technology

SLUS754 – MARCH 2007

1

INTRODUCTION

.......................................... 1

4.1

DATA COMMANDS

.................................. 8

1.1

FEATURES

........................................... 1

4.2

EXTENDED DATA COMMANDS

................... 13

1.2

APPLICATIONS

...................................... 1

4.3

DATA FLASH INTERFACE

......................... 16

1.3

DESCRIPTION

....................................... 1

4.4

MANUFACTURER INFORMATION BLOCKS

...... 16

2

DEVICE INFORMATION

................................. 3

4.5

ACCESS MODES

................................... 17

2.1

AVAILABLE OPTIONS

............................... 3

4.6

SEALING/UNSEALING DATA FLASH ACCESS

... 17

2.2

PIN DIAGRAM

........................................ 3

4.7

DATA FLASH SUMMARY

........................... 17

2.3

TERMINAL FUNCTIONS

............................. 3

5

FUNCTIONAL DESCRIPTION

........................ 19

3

ELECTRICAL SPECIFICATIONS

...................... 4

5.1

FUEL GAUGING

.................................... 19

3.1

ABSOLUTE MAXIMUM RATINGS

................... 4

5.2

IMPEDANCE TRACK VARIABLES

................. 20

3.2

RECOMMENDED OPERATING CONDITIONS

...... 4

5.3

TEMPERATURE MEASUREMENT

................. 21

3.3

POWER-ON RESET

.................................. 4

5.4

OVER-TEMPERATURE INDICATION

.............. 22

5.5

CHARGING AND CHARGE TERMINATION

3.4

TEMPERATURE SENSOR CHARACTERISTICS

... 4

INDICATION

......................................... 22

3.5

LOW FREQUENCY OSCILLATOR

................... 5

5.6

POWER MODES

.................................... 22

3.6

HIGH FREQUENCY OSCILLATOR

.................. 5

5.7

POWER CONTROL

................................. 24

3.7

INTEGRATING ADC (COULOMB COUNTER)

CHARACTERISTICS

................................. 5

5.8

AUTOCALIBRATION

................................ 25

3.8

ADC (TEMPERATURE AND CELL VOLTAGE)

6

COMMUNICATIONS

.................................... 25

CHARACTERISTICS

................................. 5

6.1

I2C INTERFACE

..................................... 26

3.9

I2C-COMPATIBLE INTERFACE TIMING

6.2

AUTHENTICATION

................................. 27

CHARACTERISTICS

................................. 5

7

REFERENCE SCHEMATIC

............................ 27

4

GENERAL DESCRIPTION

.............................. 7

2

Contents

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