General Description

The AAT3670 BatteryManager is a highly integrated single-cell lithium-ion/polymer (Li-ion) battery charger and system power management IC that enables simultaneous battery charging and full system usage without compromising the battery’s charge cycle life. It operates with low-voltage AC adapter (ADP) and USB inputs and requires a minimum number of external components.

Features

• ADP, USB, or Battery Powers System Load Through Internal Current-Limited Switches

• Simultaneous Battery Charging and System Usage

• Voltage Sensed Charge Reduction Loop to Minimize Charge Time, Even While the System Operates

• Digitized Thermal Loop

• Battery Power Enable (ENBAT)

• Battery Charge Timer (CT)

• Battery Temperature Monitoring (TS)

• Battery Charge Status Report (STATx)

• Automatic Recharge Sequencing

• Battery Under-Voltage, Over-Voltage, and OverCurrent Protection

• System Load Current Limiting

• Thermal Protection

• 24-pin 4x4mm QFN Package

Applications

• Cellular Telephones

• Digital Still Cameras

• Personal Data Assistants (PDAs)

• Hand Held PCs

• MP3 Players and PMP

• Other Li-ion Battery Powered Devices