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0.5A/1.0A USB Port/Adapter

Lithium-Ion/Polymer Battery Charger

General Description

The AAT3689 BatteryManager is a highly integrat-

ed single cell lithium-ion/polymer battery charger

IC designed to operate with USB port and AC

adapter inputs. It requires a minimum number of

external components.

The AAT3689 precisely regulates battery charge

voltage and current for 4.2V lithium-ion/polymer bat-

tery cells. Adapter charge current rates may be pro-

grammed up to 1.0A. In the absence of an adapter

and with a USB port connected, the battery can also

be charged by USB power. The USB charge current

can be programmed up to 500mA. USB charging is

disabled when an adapter is present.

Battery temperature and charge state are fully

monitored for fault conditions. In the event of an

over-voltage or over-temperature failure, the

device will automatically shut down, thus protecting

the charging device, control system, and the bat-

tery under charge. Status monitor output pins are

provided to indicate the battery charge status by

directly driving two external LEDs.

The AAT3689 is available in a Pb-free, thermally-

enhanced, space-saving 12-pin 3x3mm TDFN

package and is rated over the -40擄C to +85擄C tem-

perature range.

AAT3689

Features

鈥?/div>

BatteryManager

鈩?/div>

鈥?/div>

USB/AC Adapter System Power Charger

鈥?USB: Programmable up to 500mA

鈥?Adapter: Programmable up to 1.0A

4.0V to 5.5V Input Voltage Range

Adapter Presence Automatically Disables

USB Charging

High Level of Integration With Internal:

鈥?Charging Devices

鈥?Reverse Blocking Diodes

鈥?Current Sensing

Automatic Recharge Sequencing

Battery Temperature Monitoring

Full Battery Charge Auto Turn-Off

Over-Current Protection

Over-Voltage Protection

Emergency Thermal Protection

Power On Reset and Soft Start

12-Pin 3x3 TDFN Package

Applications

鈥?/div>

Cellular Telephones

Digital Still Cameras

Hand-Held PCs

MP3 Players

Personal Data Assistants (PDAs)

Other Lithium-Ion/Polymer Battery-Powered

Devices

Typical Application

Enable

EN

USB Input

USB

USBSET

R

SETUSB

BATT+

BAT

TS

C2

10渭F

AAT3689

ADP Input

R

SETADP

ADP

ADPSET

STAT1

BATT-

CT

C

T

GND

TEMP

STAT2

Battery Pack

3689.2006.11.1.0

1

型號

版本

描述

廠商

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