USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger - AAT
Description
USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger General Description
The AAT3681 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 6.
5V.
It requires just one external component.
The AAT3681 precisely regulates battery charge voltage and current for 4.
2V (4.
375V option) lithiumion/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 300mA.
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.
AAT3681
Features
• • • • • • • • • • • •
BatteryManager™
USB or AC Adapter System Power Charger — Programmable from 15mA to 300mA 4.
0V ~ 6.
5V Input Voltage Range High Level of Integration with Internal: — Charging Device — Reverse Blocking Diode Automatic Current Sensing Automatic Recharge Sequencing Full Battery Charge Auto Turn Off/Sleep Mode/Charge Termination Shutdown Current <1µA Automatic Trickle Charge for Battery PreConditioning (AAT3681-1 is No Trickle Charge Option) Over-Voltage and Emergency Thermal Protection Power On Reset and Soft Start LED Status Pin 8-Pin 2.
0x2.
1mm SC70JW Package
The AAT3681 is available in a Pb-free, thermally enhanced, space-saving 8-pin 2.
0x2.
1mm SC70JW package and is specified for operation over www.
DataSheet4U.
com the Applications -40°C to +85°C temperature range.
• • • • • • • 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
Typical Application
Adapter/USB...
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