FAN4822 Power Factor Controller

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.

Features:

1. • Average current sensing, continuous boost, leading edge PFC for low total harmonic distortion and near unity power factor
2. • Built-in ZVS switch control with fast response for high efficiency at high power levels
3. • Average line voltage compensation with brownout control
4. • Current fed gain modulator improves noise immunity and provides universal input operation
5. • Overvoltage comparator eliminates output “runaway” due to load removal
6. • UVLO, current limit, and soft-start
7. • Precision 1.3% reference

Package Included:

• 1pc * FAN4822 Power Factor Controller