BQ29312A_15 datasheet(8/39 Pages) TI1

Part #	BQ29312A

Description	FOUR-CELL LITHIUM-ION

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Manufacturer	TI1 [Texas Instruments]

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GND

SR1

SR2

Overload

Comparator

Short-Circuit

SHORT-CIRCUIT

DELAY

Open-

Drain

Output

Watchdog

Timer

OD

Cell Voltage

Translation

Power

Mode

Circuit

Drive

Control

VCELL

R SNS

RCELL

CCELL

TOUT

RTHERM

C THERM

THERMISTOR

Cell

Selection

Switches

3.3V LDO

POR

SHIP_ON

SLEEP_ON

BAT

PACK

REG

C (REG)

FET

Logic

Gate Driver

CHG_ON

DSG_ON

ZVCHG_ON

DSG

CHG

ZVCHG

PACK-

PACK+

R(ZVCHG)

PMS

GG VDD

VC1

VC2

VC5

CELL 3

CELL 4

VC3

VC4

CELL 1

CELL 2

GG TS

INPUT

GG ANALOG

INPUT

SLEEP

REG

WDI

SLEEP

CONTROL

32-kHz INPUT

FROM GG

GG INTERFACE

SDATA

ALERT TO GG

OPEN-DRAIN

OUTPUT

GG INTERFACE

SCLK

SDATA

SCLK

XALERT

Status

Output Ctl

State Ctl

Function Ctl

CELL_SEL

OCDV

OCDT

SCC

SCD

Registers

Comparator

OVERCURRENT

REG

200 k

0.2-A

Current Source

_

+

-

bq29312A

SLUS629A – JANUARY 2005 – REVISED AUGUST 2005

FUNCTIONAL BLOCK DIAGRAM

8

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