onsemi PMIC - PMIC - PFC (Power Factor Correction) - FAN4800CUM FAN4800CUM

The FAN4800CUM is a highly integrated Power Factor Correction (PFC) and Pulse Width Modulation (PWM) controller designed for power supply applications. It operates in both current-mode and feed-forward voltage-mode, allowing for flexible configuration. The device features internally synchronized leading-edge PFC and trailing-edge PWM, which simplifies design and reduces the number of external components required. Key protective features include over-voltage and under-voltage protections, open-loop protection for PFC feedback, and cycle-by-cycle current limiting for both PFC and PWM operations. The FAN4800CUM also incorporates line sagging protection and a soft-start function to enhance reliability during power-on sequences. This controller is suitable for various applications, including desktop PC power supplies, internet server power supplies, LCD TV and monitor power supplies, battery chargers, DC motor power supplies, and telecom systems. It is available in a 16-pin Small Outline Package (SOP) and operates over a temperature range of -40°C to +105°C. The PWM frequency ratio is set at 1:2, making it compatible with a range of existing designs.