AAT3681A Datasheet | Advanced Analogic Technologies

500m A USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger General Description .. Features - - - Battery Manager™ The AAT3681A Battery Manager 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 ponent. The AAT3681A 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 500m A. 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 2.0x2.1mm SC70JW package and is specified for operation over the -40°C to +85°C temperature range. - - - - - - - - - USB or AC Adapter System Power Charger - Programmable from 15m A to 500m A 4.0V ~ 7.5V 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 Pre Conditioning (AAT3681A-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 Applications - - - - - - - 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...