AAT3688AIWP-4.2-3-T1 Advanced Analogic Technologies, Inc., AAT3688AIWP-4.2-3-T1 Datasheet

AAT3688AIWP-4.2-3-T1

Manufacturer Part Number

AAT3688AIWP-4.2-3-T1

Description

Manufacturer

Advanced Analogic Technologies, Inc.

Datasheet

1.AAT3688A.pdf (24 pages)

Specifications of AAT3688AIWP-4.2-3-T1

Date_code

06+

Packing_info

TDFN33-12

Current page: 1 of 24
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General Description

The AAT3688A BatteryManager™ is a highly inte-

grated single cell lithium-ion/polymer battery

charger IC designed to operate with USB port

inputs. It requires the minimum number of external

components.

The AAT3688A precisely regulates battery charge

voltage and current for 4.2V lithium-ion/polymer

battery cells. Depending on the USB port type, the

AAT3688A charge current can be programmed for

two separate levels up to 1A. An optional Charge

Reduction Loop is built in to allow users to charge

the battery with available current from a USB port,

while keeping the port voltage regulated.

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. A serial interface

output is available to report any one of 14 various

status states to a microcontroller.

The AAT3688A 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 tem-

perature range.

Typical Application

3688A.2006.12.1.7

USB Hi/Lo Select

USB Input

Enable

SETH

SETL

USB

USBSEL

USBH

USBL

STAT1

AAT3688A

STAT2

DATA

GND

CHR

BAT

Features

•

Applications

•

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 for USB Charging

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

Cellular Telephones

Digital Still Cameras

Hand-Held PCs

MP3 Players

Personal Data Assistants (PDAs)

Other Lithium-Ion/Polymer Battery-Powered

Devices

1A USB Port Lithium-Ion/

Polymer Battery Charger

10μF

BATT+

BATT-

TEMP

BatteryManager

Serial Data

Battery Pack

™

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