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Part Number: FAN4822
Description: The FAN4822 is a PFC controller designed specifically for high power applications. The controller cont...
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FAN4822
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DataSheet
General Description
FAN4822 General Description
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.
FAN4822 Maximum Ratings
| 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 |
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 high efficiency at high power levels
• Average line voltage compensation with brownout control
• Current fed gain modulator improves noise immunity and provides universal input operation
• Overvoltage comparator eliminates output "runaway" due to load removal
• UVLO, current limit, and soft-start
• Precision 1.3% reference
• Built-in ZVS switch control with fast response for high efficiency at high power levels
• Average line voltage compensation with brownout control
• Current fed gain modulator improves noise immunity and provides universal input operation
• Overvoltage comparator eliminates output "runaway" due to load removal
• UVLO, current limit, and soft-start
• Precision 1.3% reference
FAN4822 Connection Diagram
FAN4822
PDF/DataSheet Download
- Datasheet: FAN4822
- File Size: 73643 KB
- Manufacturer: FAIRCHILD [Fairchild Semiconductor]
- Click here to Download
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