The FAN4801MYH is a power factor correction (PFC) controller from Fairchild/ON Semiconductor. It is designed to improve the power factor of electronic devices, making them more energy-efficient and compliant with regulatory standards. This controller is commonly used in power supplies for computers, televisions, and other electronic equipment.

Applications

• Desktop PC power supplies
• LCD TV power supplies
• AC-DC adapters
• Electronic lighting ballasts
• Server power supplies

Features

• Active power factor correction
• Low startup current
• Over-voltage protection
• Open-loop protection
• Soft-start function

Benefits

• Improved energy efficiency
• Reduced harmonic distortion
• Compliance with regulatory standards
• Protection against damage from over-voltage and open-loop conditions
• Smoother startup operation

Specifications

The FAN4801MYH operates in critical conduction mode (CRM). It includes comprehensive protection features such as over-voltage protection (OVP), open-loop protection, and over-current protection. It features a low startup current of 100µA and a maximum operating frequency of 100kHz. The controller is available in an 8-SOIC package.