AAT3685IWP-4.2-1-T1 データシートの表示（PDF） - Analog Technology Inc

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AAT3685IWP-4.2-1-T1

Lithium-Ion/Polymer Battery Charger

Analog Technology Inc 

BatteryManagerTM

General Description

The AAT3685 BatteryManager™ is a highly integrated

single cell lithium-ion/polymer battery charger IC designed

to operate with USB port or line adapter inputs. It

requires the minimum number of external components.

The AAT3685 precisely regulates battery charge voltage

and current for 4.2V lithium-ion/polymer battery cells.

Regardless of the type of input power source (USB or

adapter), the AAT3685 can be programmed for two

separate constant current charge levels up to 1A. An

optional Charge Reduction Loop is built in to allow users

to charge the battery with available current from the

charge supply, while keeping the port voltage regulated.

Battery temperature and charge state are fully moni-

tored for fault conditions. In the event of an over-volt-

age or over-temperature failure, the device will auto-

matically shut down, thus protecting the charging device,

control system, and the battery under charge. Status

monitor output pins are provided to indicate the battery

charge status by directly driving two external LEDs. A

serial interface output is available to report any one of

14 various status states to a microcontroller.

The AAT3685 is available in a Pb-free, thermally-enhanced,

space-saving 12-pin 3x3mm TDFN package and is rated

over the -40°C to +85°C temperature range.

PRODUCT DATASHEET

AAT3685

Lithium-Ion/Polymer Battery Charger

Features

• Adapter or USB Charger

▪ Programmable up to 1A Max

• 4.0V to 5.5V Input Voltage Range

• High Level of Integration With Internal:

▪ Charging Device

▪ Reverse Blocking Diode

▪ Current Sensing

• Automatic Recharge Sequencing

• Charge Reduction Loop

• Battery Temperature Monitoring

• Full Battery Charge Auto Turn-Off

• Over-Voltage Protection

• Emergency Thermal Protection

• Power On Reset and Soft Start

• Serial Interface Status Reporting

• 12-Pin 3x3mm TDFN Package

Applications

• Cellular Telephones

• Digital Still Cameras

• Hand-Held PCs

• MP3 Players

• Personal Data Assistants (PDAs)

• Other Lithium-Ion/Polymer Battery-Powered Devices

Typical Application

Enable

Adapter or USB Input

Input Hi/Lo Select

RSETH

ADP/USB EN CHR

PWRSEL

SETH

BAT

SETL

TS

RSETL

AAT3685

GND

STAT1

DATA

STAT2

BATT+

C2

10µF

BATT-

TEMP

Battery Pack

Serial Data

3685.2007.12.1.4

www.analogictech.com

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