onsemi PMIC - Battery Chargers FAN54041UCX

The FAN54041UCX is a USB-compliant switch-mode charger designed for single-cell Li-Ion and Li-Polymer battery packs, featuring a maximum charge current of 1.55 A. It incorporates a power path circuit that allows for fast system startup even when the battery is dead, ensuring the system can power up quickly upon VBUS connection. The device operates with a float voltage accuracy of ±0.5% at 25°C and ±1% across a temperature range of 0 to 125°C. This charger supports programmable charging parameters through a high-speed I²C interface, allowing for customization of input current, fast-charge/termination current, and float voltage settings. It also features a 3 MHz synchronous buck PWM controller, which minimizes the size of external components. The FAN54041UCX is packaged in a compact 25-bump WLCSP format, making it suitable for applications in cell phones, tablets, and portable media players. Engineers should consider this product for its efficiency, programmability, and compact design, particularly in applications requiring reliable battery management and fast charging capabilities.