BQ24650 datasheet(11/33 Pages) TI

Part #	BQ24650

Description	Synchronous Switch-Mode Battery Charge Controller for Solar Power With Maximum Power Point Tracking

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Manufacturer	TI [Texas Instruments]

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VCC

BTST

HIDRV

PH

REGN

LODRV

GND

TS

VFB

SRP

6V LDO

V(SRP-SRN)

COMP

ERROR

AMPLIFIER

20 uA

1V

2.1 V

0.8V

SRN

STATE

MACHINE

LOGIC

BATTERY

DETECTION

LOGIC

VCC

PH

4V

+

_

BTST

REFRESH

CE

145 C

°

IC Tj

TSHUT

SRN+100 mV

VCC

SLEEP

LEVEL

SHIFTER

+

-

+

-

+

-

V(SRP-SRN)

CHG_OCP

+

-

200% X IBAT_REG

SYNCH

SRP-SRN

IBAT_ REG

0.8V

10

5 mV

20X

VFB

BAT_OVP

+

-

104% X 2.1V

LTF

+

-

HTF

VREF

TCO

+

-

+

-

SUSPEND

VCC

ACOV

+

-

32V

CE

VREF

STAT 1

STAT1

3.3V

LDO

VCC

VFB

LOWV

+

-

RCHRG

+

-

1.5V

+

-

2.05V

VFB

LOWV

RCHRG

TERM

+

-

V(SRP - SRN)

TERM

TERMINATE CHARGE

+

-

bq24650

+

-

+

-

UVLO

VUVLO

VCC

SLEEP

UVLO

PWM

CONTROL

LOGIC

PWM

+

-

+

-

+

-

STAT 2

+

-

CHARGE

20uA

DISCHARGE

CHARGE

8 mA

BAT_OVP

VOLTAGE

REFERENCE

VREF

0.8V

10

STAT2

30 Minute

Precharge

Timer

FAULT

2 mA

DISCHARGE

MPPSET

1.2 V

+

-

175 mV

+

-

TERM_EN

FBO

EAI

EAO

bq24650

www.ti.com

SLUSA75 – JULY 2010

BLOCK DIAGRAM

Figure 15. Functional Block Diagram

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