AAT3686 Datasheet | AAT

USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger General Description Features Battery Manager™ The AAT3686 Battery Manager is a highly integrated - USB Port/AC Adapter System Power Charger single-cell lithium-ion/polymer battery charger IC - USB: Programmable to 500m A 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 ponents. - 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 500m A. 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 adapter is present. Protection Battery temperature and charge state are fully moni- Power On Reset and Soft Start tored for fault conditions. In the event of an over-volt- Serial Interface Status Reporting age or over-temperature failure, the device will auto- TDFN34-16 or TDFN44-16 Package matically shut down, thus protecting the charging .. device, control system, and the battery under charge. Status monitor output pins are provided to indicate the battery charge status by...