BQ24055DSST datasheet(10/37 Pages) TI

Part #	BQ24055DSST

Description	800mA Single Cell Li-Ion Battery Charger With Automatic Adaptor/USB Detection

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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Charge

Pump

IN

OUT

OUTREGREF

T C

J

o

TJ°C

125

ThermalRegulation

°CREF

IN

ISET

Charge

Pump

PRE-TERM

75 A

m

+

CHARGE

CONTROL

OUT

VTERM_EN

ISET2(LOW=ISET,HI=USB500,

FLOAT =USB100)

VCOLD-FLT

VHOT-45C

VTTDM

TS

5 A

m

45 A

m

VCLAMP = 1.4 V

ColdTemperature

SinkCurrent

= 45 A

m

LO=TTDM MODE

HI = CHIP DISABLE

OUT

CHG

ON:

OnDuring

1stChargeOnly

OFF:

+Increasedfrom 75 A to85 A for

m

1

st minuteofcharge.

+

_

+

_

+

_

+

_

+

_

+

_

InternalCharge

CurrentSense

w/MultipleOutputs

USBSense

Resistor

USB100/500REF

+

_

1.5 V

FASTCHARGE

PRE-CHARGE

PG

HI

= SuspendCHG

VCOLD-10C

VHOT-FLT

HI =HalfCHG(JEITA)

HI =4.06Vreg(JEITA)

VDISABLE

D+/ D-

DETECTION

CONTROL

- OnInitial

SupplyPower

Connection

D+

D-

0.6 V(200 mA)

(100 mA)

bq24055Only

+

-

80

mV

OUT

Input

Power

I

x1.5V

540 A

OUT

W

+

_

IN-DPMREF

150 C

ThermalShutdown

o

REF

0.9 VFloat

+

_

Disable

SinkCurrent

= 20 A

m

X2 Gain (1:2)

Term:Pre-CHG

TermReference

Pre-CHGReference

Detect

IN

OVPREF

bq24050

bq24052

bq24055

SLUS940A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009.................................................................................................................................... www.ti.com

FUNCTIONAL BLOCK DIAGRAM

10

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Product Folder Link(s): bq24050 bq24052 bq24055

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