onsemi Battery Charger, -40 To 85Deg C Rohs Compliant Onsemi FAN54005UCX.

The FAN54005 is a highly integrated switch-mode battery charger designed for single-cell Li-Ion and Li-Polymer battery packs. It operates within a temperature range of -40¬8C to +85¬8C and is compliant with RoHS standards. The charger supports configurable output currents from 200 mA to 1.45 A, adjustable via an external resistor, and features programmable charging parameters through a high-speed I2C interface. The device employs a three-phase charging process: conditioning, constant current, and constant voltage, ensuring efficient battery management. It includes a safety timer and automatically restarts charging when the battery voltage drops below a certain threshold. The FAN54005 also functions as a boost regulator, providing up to 5 V at 500 mA for USB On-The-Go applications. With a compact 20-bump WLCSP package measuring 1.96 x 1.87 mm, the FAN54005 is suitable for applications in wireless speakers, cell phones, gaming devices, and IoT devices. The charger boasts high efficiency, with up to 95% efficiency for 200 mA-hour batteries, and features such as low reverse leakage to prevent battery drain.