Lithium-ion/Polymer Battery Charger IC

Advanced Analogic Technologies Inc. is offering the AAT3686, a lithium-ion/polymer battery charger IC designed to operate off both USB and AC adapter inputs.

The new dual-path charger has a digital thermal loop and a charge reduction loop that allows users to charge the battery with available current from the USB port while keeping the port voltage regulated. This feature ensures the battery charge function will not overload the USB port if other system loads share power with the port supply.

The AAT3686 also adds a digital thermal loop control system that maximizes charging current. The control uses the measured value of the internal circuit die temperature and reduces the charging current when the die temperature exceeds preset thresholds.

For rapid charging, the AAT3686 supports programmable adapter charge current rates up to 1.5A. USB charge rates can be programmed to two levels, USB high and USB low, up to a maximum current level of 500mA. USB charging is automatically disabled when an adapter is present.

The AAT3686 is available in a Pb-free, thermally-enhanced, 16-pin 4x4mm TDFN package for $1.64 in 1,000-piece quantities.

For more information, visit www.analogictech.com.