bq24640RVAR datasheet(11/25 Pages) TI

Part #	bq24640RVAR

Description	High-Efficiency Synchronous Switch-Mode Super Capacitor Charger

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Manufacturer	TI [Texas Instruments]

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VCC

BTST

HIDRV

PH

REGN

LODRV

GND

TS

CE

VREG

SRP

6V LDO

V(SRP-SRN)

COMP

ERROR

AMPLIFIER

20uA

1V

SRN

STATE

MACHINE

LOGIC

VCC

PH

4V

+

_

BTST

REFRESH

CE

145 degC

IC Tj

TSHUT

SRN+100mV

VCC

SLEEP

LEVEL

SHIFTER

+

-

+

-

+

-

+

-

+

-

V(SRP-SRN)

CHG_OCP

+

-

160% X ISET

SYNCH

SRP-SRN

ISET

5 mV

20X

OUT_OVP

+

-

104% X VREG

LTF

+

-

HTF

VREF

TCO

+

-

+

-

SUSPEND

VCC

ACOV

+

-

VACOV

CE

VREF

STAT

3.3V

LDO

VCC

bq24640

+

-

+

-

UVLO

VUVLO

VCC

SLEEP

UVLO

PWM

CONTROL

LOGIC

+

-

PWM

+

-

+

-

+

-

PG

+

-

CHARGE

20uA

CHARGE

8mA

OUT_OVP

VOLTAGE

REFERENCE

VREF

PG

1M

FBO

EAO

EAI

VFB

bq24640

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SLUSA44 – MARCH 2010

BLOCK DIAGRAM

Figure 9. Functional Block Diagram

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bq24640RVAR Datasheet(PDF) 11 Page - Texas Instruments

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