The FAN7544 is a boundary mode PFC (Power Factor Correction) controller. It is designed to improve power factor and reduce total harmonic distortion (THD) in power supplies. The FAN7544 is manufactured by Fairchild/ON Semiconductor and is categorized as END-OF-LIFE.

Applications

• Power supplies for desktop PCs
• Power supplies for LCD TVs
• Power supplies for adapters
• Electronic ballasts for lighting
• LED lighting power supplies

Features

• Boundary mode operation
• Low start-up current
• Cycle-by-cycle current limiting
• Over-voltage protection (OVP)
• Open-loop protection
• Adjustable output voltage
• Brown-out protection
• Precise maximum duty cycle control

Benefits

• High power factor correction, reducing energy waste
• Low total harmonic distortion (THD), meeting regulatory standards
• Improved efficiency in power supplies
• Increased reliability with built-in protection features
• Simplified power supply design
• Reduced component count and system cost
• Stable and reliable operation

Additional Details

The FAN7544 operates in boundary mode, which helps to reduce switching losses and improve efficiency. It includes various protection features to ensure safe and reliable operation. The device comes in an 8-pin package. External components such as inductors, capacitors, and MOSFETs are necessary. Designers should consult the Fairchild/ON Semiconductor datasheet for detailed specifications, application circuits, and layout recommendations. As the FAN7544 is an END-OF-LIFE product, alternatives should be evaluated for new designs.