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1.0A USB Port/Adapter

Lithium-Ion/Polymer Battery Charger

General Description

The AAT3690 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 the minimum number of

external components.

The AAT3690 precisely regulates battery charge

voltage and current for 4.2V lithium-ion/polymer

battery cells. Adapter charge current rates can be

programmed up to 1.0A. In the absence of an

adapter and with a USB port connected, the bat-

tery can also be charged by USB power. The USB

charge current can be programmed up to 1A. A

Charge Reduction Loop is also built in to allow

users to charge the battery with the available cur-

rent from a USB port, while keeping the port volt-

age regulated. 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 condition, 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 AAT3690 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.

AAT3690

Features

鈥?/div>

BatteryManager

鈩?/div>

鈥?/div>

USB/AC Adapter System Power Charger

鈥?USB: Programmable up to 1.0A

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

Digital Thermal Regulation in ADP Charge

Charge Reduction Loop in USB Charge

Battery Temperature Monitoring

Full Battery Charge Auto Turn-Off

Over-Current Protection

Over-Voltage Protection

Emergency Thermal Protection

Power On Reset and Soft Start

Serial Interface Status Reporting

12-Pin 3x3mm 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

USB Input

USB

USBSET

R

SETUSB

EN

BAT

TS

C2

10渭F

BATT+

AAT3690

ADP Input

R

SETADP

ADP

ADPSET

STAT1

BATT-

CT

C

T

GND

STAT2

TEMP

Battery Pack

3690.2007.01.1.2

1

型號

版本

描述

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AAT3690IWP-4.2-T1 Datasheet

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