General Description

The AAT3683 BatteryManager is a highly integrated single-cell lithium-ion / polymer (Li-Ion) battery charger that operates from a USB port or an AC adapter input up to an input voltage of 7.5V.

The AAT3683 precisely regulates battery charge voltage and current for 4.2V Li-Ion battery cells. The battery charging current can be set by an external resistor up to 1A.

Features

• USB or AC Adapter Input

• Programmable from 100mA to 1A

• 4.0V to 7.5V Input Voltage Range

• High Level of Integration with Internal:

▪ Charging Device

▪ Reverse Blocking Diode

▪ Current Sensing

• Digital Thermal Regulation

• Charge Current Programming (ISET)

• Charge Termination Current Programming (TERM)

• Charge Timer (CT)

• Battery Temperature Sensing (TS)

• TS Pin Open Detection

• Automatic Recharge Sequencing

• Automatic Trickle Charge for Battery Pre-Conditioning (no trickle charge option available)

• Full Battery Charge Auto Turn-Off / Sleep Mode / Charge Termination

• 1μA Max. Shutdown Current

• Over-Voltage and Over-Current Protection

• Emergency Thermal Protection

• Power On Reset and Soft Start

• 2.2x2.2mm STDFN-10 (AAT3863-2 and -3) and QFN33-16 (AAT3683-4) Packages

Applications

• Bluetooth Headsets, Headphones, Accessories

• Cellular Phones

• Digital Still Cameras

• MP3, Portable Music, and Portable Media Players

• Personal Data Assistants (PDAs) and Handheld Computers

• Other Li-Ion Battery-Powered Devices