BQ29311 datasheet(6/24 Pages) TI1

Part #	BQ29311

Description	FOUR-CELL LITHIUM-ION

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Manufacturer	TI1 [Texas Instruments]

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bq29311

SLUS487D − DECEMBER 2001 − REVISED NOVEMBER 2003

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6

FUNCTIONAL BLOCK DIAGRAM

OCVD/OCVC

SCV

OCD/SCD

Control

Cell

SDV

Communication

Over-Current

Short-Current

Sensing

VREF

Startup

Input

Shutdown

Monitor

Delay

Control

CLKGEN

3.3V

Regulator

EN

Thermistor Drive

Status

Logic

Cell

Select

Balance

Cell

Voltage

Monitor

SCLK

SDATA

GND

SR2

SR1

VBAT

VCC

DSG

CHG

VPACK

VC1

VC2

VC3

VC4

VC5

CNTL

PCHG

VREG

To internal

Circuitry

CHG/DSG

Output Control

Back-Up

CLK

Status

Pack−

Pack+

TOUT

LEDOUT

VREG

XALERT

CLKIN

VCELL

GND

18

VREG

20

LED Drive

CNTL

VREG

10k

100k

1uA

PCHG

Output Control

− OC for Discharge

− OC for Charge

− SC for Discharge

− SC for Charge

− Brownout

Input

Brownout

Monitor

19

24

17

16

12

11

15

20

22

21

23

1

10

2

3

4

5

13

9

8

7

6

Select

Not Recommended for New Designs

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