The FAN4822 is a PFC controller designed specifically for high power applications. The controller contains all of the functions necessary to implement an average current boost PFC converter, along with a Zero Voltage Switch (ZVS) controller to reduce diode recovery and MOSFET turn-on losses. The average current boost PFC circuit provides high power factor (>98%) and low Total Harmonic Distortion (THD). Built-in safety features include undervoltage lockout, overvoltage protection, peak current limiting, and input voltage brownout protection. The ZVS control section drives an external ZVS MOSFET which, combined with a diode and inductor, soft switches the boost regulator. This technique reduces diode reverse recovery and MOSFET switching losses to reduce EMI and maximize efficiency.
The FAN4822 is a high‑power PFC controller with built‑in zero‑voltage‑switching (ZVS) control, average current sensing, and a precision 1.3 % reference. It provides leading‑edge PFC, low total harmonic distortion, and safety features such as UVLO, over‑voltage protection, and soft‑start.
The document lists pin configurations for 14‑pin PDIP and 16‑pin SOIC packages, absolute maximum ratings, electrical characteristics, mechanical dimensions, and ordering information. It also includes functional descriptions, theory of operation, and application notes for designing ZVS PFC supplies.
| Shunt Regulator Current (Icc) | 55 mA |
|---|---|
| Peak Driver Output Current | +500 mA |
| Reference Output Voltage (typical) | 7.5 V |
| Supply Voltage (Vcc) range | 12.8 V to 14.2 V |
The typical internal reference voltage is 7.5 V.
The FAN4822 is offered in a 14‑pin PDIP (P14) and a 16‑pin wide SOIC (S16W).