AAT3686

USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger General Description Features AAT3686 BatteryManager™ The AAT3686 BatteryManager is a highly integrated USB Port/AC Adapter System Power Charger single-cell lithium-ion/polymer battery charger IC — USB: Programmable to 500mA for designed to operate with USB port and AC adapter USB Hi/Lo inputs. It requires the minimum number of external — Adapter: Programmable to 1.5A Max components. 4.0V to 5.5V Input Voltage Range Adapter Present Indicator (ADPP# Pin) The AAT3686 precisely regulates battery charge Adapter Presence Automatically Disables voltage and current for 4.2V lithium-ion/polymer USB Charging battery cells. Adapter charge current rates can be High Level of Integration With Internal: programmed up to 1.5A. In the absence of an — Charging Devices adapter and with a USB port connected, the battery — Reverse Blocking Diodes can also be charged by USB power. Depending on — Current Sensing the USB port type, the AAT3686 charge current can Automatic Recharge Sequencing be programmed for two separate levels up to Digital Thermal Regulation in ADP Charge 500mA. An optional Charge Reduction Loop is also Charge Reduction Loop in USB Charge built in to allow users to charge the battery with Battery Temperature Monitoring available current from a USB port, while keeping Full Battery Charge Auto Turn-Off the port voltage regulated. USB charging is dis Over-Voltage and Emergency Thermal abled when an adapt...