The FAN7930 is an active Power Factor Correction (PFC) controller for boost converters that operate in Continuous Conduction Mode (CCM). It is manufactured by Fairchild/ON Semiconductor and is listed as END-OF-LIFE. This controller is designed to improve power factor and reduce total harmonic distortion in power supplies.

Applications

• Power supplies for LCD TVs
• Power supplies for PDP TVs
• Power supplies for desktop PCs
• Server power supplies
• Industrial power supplies

Features

• Continuous Conduction Mode (CCM) operation
• Precise adjustable output overvoltage protection
• Cycle-by-cycle current limiting
• Open-loop protection
• Over-temperature protection (OTP)
• Low start-up current
• Internal soft-start
• Brown-out protection

Benefits

• Improved power factor
• Reduced total harmonic distortion (THD)
• High efficiency
• Enhanced system reliability with protection features
• Simplified PFC design
• Reduced component count
• Stable and reliable operation

Additional Details

The FAN7930 utilizes CCM operation, which generally results in lower EMI (Electromagnetic Interference) compared to discontinuous conduction mode. The device is typically available in an 8-pin DIP or SOIC package. External components, including an inductor, MOSFET, and rectifier diode, are necessary to complete the PFC circuit. Refer to the Fairchild/ON Semiconductor datasheet for detailed specifications, application circuits, and PCB layout recommendations. As an end-of-life product, consider alternatives for new designs.