Features: • Average current sensing, continuous boost, leading edge PFC for low total harmonic distortion and near unity power factor• Built-in ZVS switch control with fast response for high efficiency at high power levels• Average line voltage compensation with brownout control&...
FAN4822: Features: • Average current sensing, continuous boost, leading edge PFC for low total harmonic distortion and near unity power factor• Built-in ZVS switch control with fast response for ...
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Parameter | Min | Max | Unit |
Shunt Regulator Current (ICC) | 55 | mA | |
Peak Driver Output Current | ±500 | mA | |
Analog Inputs | -0.3 | 7 | V |
Junction Temperature | 150 | °C | |
Storage Temperature Range | -65 | 150 | °C |
Lead Temperature (Soldering, 10 sec) | 150 | °C | |
Thermal Resistance (JA) Plastic DIP Plastic SOIC |
80 110 |
°C/W °C/W |
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.