Overview: 2A Synchronous Buck Single Cell Li-Ion USB/Adapter Charger CE3320 Series INTRODUCTION:
The CE3320 is a highly integrated standalone switch mode single-cell Li-Ion battery charger. It utilizes a 1.5MHz synchronous buck converter topology to reduce power dissipation during charging. Low power dissipation, an internal integrated MOSFET and current sense resistor allow a physically small charger that can be embedded in a wide range of space-limited portable applications with high capacity batteries. The single cell charger has a single input that operates from either a USB port or AC wall adapter for a versatile solution. The battery is charged in three phases: tricklecharge, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and shutdown the charge if the internal temperature threshold is exceeded. The CE3320 includes plete charge termination circuitry, automatic recharge and a ±1% float voltage. Battery charge current, charge timeout and end-of-charge indication parameters are set with external ponents.
