AAT3681A 500mA USB Port or AC Adapter Li-Ion/Polymer Battery Charger

The AAT3681A BatteryManager is an integrated single cell lithium-ion/polymer battery charger IC, designed to operate from a DC power source or USB port up to an input voltage of 7.5V. It requires just one external component. The AAT3681A precisely regulates battery charge voltage and current for 4.2V (4.375V option) lithium-ion/ polymer battery cells. When charged from an AC adapter or USB port, the battery charging current can be set by an external resistor up to 500mA. Battery charge state is continuously monitored for fault conditions. In the event of an over-voltage, short-circuit, or over-temperature failure, the device will automatically shut down, thus protecting the charging device, control system, and the battery under charge. A status monitor output pin is provided to indicate the battery charge status by directly driving an external LED. The AAT3681A is available in a Pb-free, thermally enhanced, space-saving 8-pin 2.0 × 2.1mm SC70JW package and is specified for operation over the -40°C to +85°C temperature range.

技术特性

USB or AC Adapter System Power Charger
Programmable from 15mA to 500mA
4.0V ~ 7.5V Input Voltage Range
High Level of Integration with Internal:
Charging Device
Reverse Blocking Diode Constant Regulated Output Voltage:
4.1 in AAT3681A-5
4.2 in AAT3681A-1/-2/-4
Automatic Current Sensing
Automatic Recharge Sequencing
Full Battery Charge Auto Turn Off/Sleep Mode/Charge Termination
Shutdown Current <1μA
Automatic Trickle Charge for Battery Pre-Conditioning
(AAT3681A-1/AAT3681A-4 is No Trickle Charge Option)
Over-Voltage and Emergency Thermal Protection
Power On Reset and Soft Start
LED Status Pin
8-Pin 2.0 × 2.1mm SC70JW Package

订购信息 Ordering Information

AAT3681A

应用领域 APPLICATION

Bluetooth® Headsets
DECT Headsets
Digital Still Cameras
MP3, Portable Music, and Portable Media Players
Personal Data Assistants (PDAs)
Wrist Watches
Other Lithium-Ion/Polymer Battery-Powered Devices

功能框图 Functional Block Diagram

应用技术支持与电子电路设计开发资源下载	版本信息	大小
AAT3681A 数据资料DataSheet下载:pdf	Rev.V2	2 页