1

FEATURES

APPLICATIONS

DESCRIPTION

ACOP

bq24753A

28LDQFN

TOP VIEW

LEARN

SRN

BAT

CELLS

SRP

SRSET

IADAPT

ACDRV

ACSET

CHGEN

ACN

ACP

ACDET

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25 24 23

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bq24753A

Host-Controlled Li-Ion and Li-Polymer Battery Charger

• Notebook, Netbook and Ultra-Mobile

2

• NMOS-NMOS Synchronous Buck Converter

Computers

with 300 kHz Frequency and >95% Efficiency

• Portable Data Capture Terminals

• 30-ns Minimum Driver Dead-time and 99.5%

• Portable Printers

Maximum Effective Duty Cycle

• Medical Diagnostics Equipment

• High-Accuracy Voltage and Current Regulation

• Battery Bay Chargers

–

±0.5% Charge Voltage Accuracy

• Battery Back-up Systems

–

±3% Charge Current Accuracy

–

±3% Adapter Current Accuracy

–

±2% Input Current Sense Amp Accuracy

The bq24753A is a high-efficiency, synchronous

• Integration

battery charger with integrated compensation and

–

Automatic System Power Selection From

system power selector logic, offering low component

count for space-constrained Li-Ion and Li-Polymer

AC/DC Adapter or Battery

battery charging applications. Ratiometric charge

–

Internal Loop Compensation

current and voltage programming allows for high

–

Internal Soft Start

regulation accuracies, and can be either hardwired

• Safety

with

resistors

or

programmed

by

the

system

power-management microcontroller using a DAC or

–

Programmable Input Overvoltage

GPIOs.

Protection (OVP)

The bq24753A charges two, three, or four series Li+

–

Fast Dynamic Power Management (DPM)

cells, supporting up to 10 A of charge current, and is

–

Programmable Inrush Adapter Power

available in a 28-pin, 5x5-mm thin QFN package.

(ACOP) and Overcurrent (ACOC) Limits

–

Reverse-Conduction Protection Input FET

• Supports Two, Three, or Four Li+ Cells

• 8 – 24 V AC/DC-Adapter Operating Range

• Analog Inputs with Ratiometric Programming

via Resistors or DAC/GPIO Host Control

–

Charge Voltage (4-4.512 V/cell)

–

Charge Current (up to 10 A, with 10-m

Ω)

–

Adapter Current Limit (DPM)

• Status and Monitoring Outputs

–

Adapter Present with Programmable

Voltage Threshold

–

Current Drawn from Input Source

• Battery Learn Cycle Control

• Charge Enable

• 28-pin, 5x5-mm QFN package

• Energy Star Low I

q

–

< 10

µA Off-State Battery Discharge Current

–

< 1.5 mA Off-State Input Quiescent Current

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.