Description
   The FAN9673 is an interleaved three−channel Continuous Conduction Mode (CCM) Power Factor Correction (PFC) controller IC intended for PFC pre−regulators. Incorporating circuits for the implementation of leading edge, average current, and “boost”−type power factor correction, the FAN9673 enables the design of a power supply that fully complies with the IEC1000−3−2 specification. Interleaved operation provides substantial reduction in the input and output ripple currents and the conducted EMI filtering becomes easier and cost effective.

FEATUREs
• Continuous Conduction Mode Control
• Three−Channel PFC Control (Maximum)
• Average Current−Mode Control
• PFC Slave Channel Management Function
• Programmable Operation Frequency Range: 18 kHz ∼ 40 kHz
   or 55 kHz ∼ 75 kHz
• Programmable PFC Output Voltage
• Dual Current Limit Functions
• TriFault Detect Protects Against Feedback Loop Failure
• Sag Protection
• Programmable Soft−Start
• Under−Voltage Lockout (UVLO)
• Differential Current Sensing
• Available in 32−Pin LQFP Package

Typical Applications
• High Power AC−DC Power Supply
• DC Motor Power Supply
• White Goods; e.g. Air Conditioner Power Supply
• Server and Telecom Power Supply
• Industrial Welding and Power Supply