BQ24751A datasheet(3/36 Pages) TI | Host-controlled Multi-Chemistry Battery Charger With System Power Selector, AC Over-Power Protection, Programmable OVP and Low Iq

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VREF

R1432kW

66.5

10kW

R3422kW

R571kW

RAC

RSR

(1) Pull-uprailcouldbeeitherVREForothersystemrail .

(2) SRSET/ACSET couldcomefromeitherDACorresistordividers .

Q2 (ACFET)

SI4435

Q3(BATFET)

SI4435

ACN

ACP

ACDRV

ACDET

ACGOOD

PVCC

BATDRV

HIDRV

BTST

REGN

LODRV

PGND

SRP

SRN

PACK+

PACK-

SYSTEM

ADAPTER+

ADAPTER-

ACGOOD

AGND

bq24751A

FDS6680A

BAT54

BAT

OVPSET

LEARN

ACOP

Q1 (ACFET)

SI4435

0.1 F

0.010 W

1 F

10 F

0.010 W

C12

10 F

0.1 F

C13

0.1 F

C11

10 F

0.1 F

C15

0.1 F

C16

0.47 F

8.2 H

PowerPad

SRSET

ACSET

VREF

CELLS

CHGEN

VDAC

VADJ

GPIO

ADC

IADAPT

HOST

1 F

100pF

66.5kW

100kW

43kW

100kW

C19

10 F

C18

10 F

C17

10 F

R10100kW

C10

1 F

PACKAGE THERMAL DATA

bq24751A

SLUS756 – SEPTEMBER 2007

VIN = 20 V, VBAT = 3-cell Li-Ion, Icharge = 3 A, Iadapter_limit = 4 A

Figure 2. Typical System Schematic, Voltage and Current Programmed by Resistor

ORDERING INFORMATION

ORDERING NUMBER

PART NUMBER

PACKAGE

QUANTITY

(Tape and Reel)

bq24751ARHDR

3000

bq24751A

28-PIN 5 x 5 mm QFN

bq24751ARHDT

250

PACKAGE

θJA

TA = 70°C POWER RATING

DERATING FACTOR ABOVE TA = 25°C

QFN – RHD(1)(2)

°C/W

2.36 W

0.028 W/

°C

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

Web site at www.ti.com.

(2)

This data is based on using the JEDEC High-K board and the exposed die pad is connected to a Cu pad on the board. This is

connected to the ground plane by a 2x3 via matrix.

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