Battery Charger Dynamically Manages System Load/Charging

The AAT3672 single-cell li-on/polymer battery charger and system manager employing a three-switch architecture enables simultaneous battery charging and system load management. It automatically reroutes power from the battery to the system without interruption when load requirements exceed available current. A single input dynamic battery charger and controller, the device is compatible with either an ac power adapter or USB port. Battery charge current is programmable up to 1.6A. The three switches provide dynamic power sourcing to the system load. If the system load exceeds the input current supply from the input source, the AAT3672 supplies additional current from the battery cell. The chip also features an intelligent thermal loop control system that continuously measures internal circuit die temperature and automatically reduces fast charge current when the device exceeds a preset internal temperature threshold. Available in a 14-pin, 3 mm x 3 mm TDFN package, price is $0.95 each/1,000. ADVANCED ANALOGIC TECHNOLOGIES INC., Sunnyvale, CA. (408) 737-4600.