FAN4800

FAN4800 — Low Startup Current PFC/PWM Controller Combinations November 2010 FAN4800 Low Startup Current PFC/PWM Controller Combinations 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 Process „ VIN OK Guaranteed Turn-on PWM at 2.25V „ VCC OVP Comparator, Low-Power Detect Comparator „ Current-Fed Gain Modulator for Improved Noise Immunity „ Brownout Control, Over-Voltage Protection, UVLO, Soft-Start, and Reference OK „ Available in16-DIP Package Applications „ Desktop PC Power Supply „ Internet Server Power Supply „ Uninterruptible Power Supply (UPS) „ Battery Charger „ DC Motor Power Supply „ Monitor Power Supply „ Telecom System Power Supply „ Distributed Power Description 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 su...