FAN4800 - Fairchild Semiconductor

FAN4800 Low Start-Up Current PFC/PWM Controller Combos

The FAN4800 is a controller for power-factor-corrected, switched-mode power supplies. Power Factor Correction (PFC) allows the use of smaller, lower-cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply that fully complies with IEC-1000-3-2 specifications. Intended as a BiCMOS version of the industry.

Features

„ Low Startup Current (100µA Typical) „ Low Operating Current (2.5mA Typical) „ Low Total Harmonic Distortion, High Power Factor „ Pin-Compatible Upgrade for the ML4800 „ Average Current, Continuous or Discontinuous Boost, Leading-Edge PFC „ Slew Rate Enhanced Transconductance Error Amplifier for Ultra-Fast PFC Response „ Internally Synchronized Leading-Edge PFC and Trailing-Edge PWM „ Reduction of Ripple Current in the Storage Capacitor between the PFC and PWM Sections „ PWM Configurable for Current Mode or Voltage Mode „ Additional Folded-Back Current Limit for PWM Section „ 20V BiCMOS Proce.