BQ24705_15 datasheet(14/32 Pages) TI1

Part #	BQ24705

Description	Host-Controlled Multi-Cell Battery Charger

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Manufacturer	TI1 [Texas Instruments]

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bq24705

IADAPT

BTST

HIDRV

PH

REGN

LODRV

PGND

BAT

6VLDO

V(ACP-ACN)

+

–

V(SRP-SRN)

COMP

ERROR

AMPLIFIER

V(IADAPT)

+

–

20x

ACP

ACN

ENA_BIAS

20 A

m

20 A

m

IIN_ER

BAT_ER

ICH_ER

1V

IIN_REG

VBAT_REG

IBAT_REG

DC-DC

CONVERTER

PWMLOGIC

PVCC

PH

4V

+

_

BTST

REFRESH

C

BTST

CHGEN

155°C

ICTj

TSHUT

LEVEL

SHIFTER

+

–

+

–

+

–

+

–

+

–

+

–

V(SRP-SRN)

CHG_OCP

+

–

145%XIBAT_REG

VREF

VBAT_REG

IBAT_REG

IIN_REG

VBATSET

IBATSET

IINSET

RATIO

PROGRAM

BAT

BAT_OVP

+

–

104%XVBAT_REG

ACDET

ACOV

+

–

+

–

3.1V

3.3V

LDO

PVCC

DPMDET

DPM_LOOP_ON

ACGOOD

PVCC_BAT

+

–

PVCC

+

–

BAT

AGND

PVCC

CHGEN

SYNCH

+

–

V(SRP-SRN)

ISYNSET

ACSET

SRSET

VADJ

CELLS

PGND

FBO

EAI

EAO

0.6V

ACDET

VREF

ACP

ACN

+

–

VREFGOOD

AC_VGOOD

2.4V

+

–

Rising

Delay

8ms

Rising

Delay

700ms

SYNCH

+

–

20x

3.5mA

CHRG_ON

SRN

SRP

185mV

20x

PVCC

UVLO

+

–

+

–

4.0V

UVLO

VREFGOOD

bq24705

SLUS779B – DECEMBER 2007 – REVISED MARCH 2009............................................................................................................................................... www.ti.com

FUNCTIONAL BLOCK DIAGRAM

14

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BQ24705 Datasheet(PDF) 14 Page - Texas Instruments

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