Description

The FAN7930B is an active power factor correction (PFC) controller for boost PFC applications that operate in critical conduction mode (CRM). It uses a voltage-mode PWM that compares an internal ramp signal with the error amplifier output to generate a MOSFET turn-off signal. Because the voltage-mode CRM PFC controller does not need rectified AC line voltage information, it saves the power loss of an input voltage sensing network necessary for a current-mode CRM PFC controller.

Features

ƒ Additional OVP Detection Pin

ƒ Input Voltage Absent Detection Circuit

ƒ Maximum Switching Frequency Limitation

ƒ Internal Soft-Start and Overshoot-less Control

ƒ Internal Total Harmonic Distortion (THD) Optimizer

ƒ Precise Adjustable Output Over-Voltage Protection

ƒ Open-Feedback Protection and Disable Function

ƒ Zero Current Detector

ƒ 150μs Internal Startup Timer

ƒ MOSFET Over-Current Protection

ƒ Under-Voltage Lockout with 3.5V Hysteresis

ƒ Low Startup and Operating Current

ƒ Totem-Pole Output with High State Clamp

ƒ +500/-800mA Peak Gate Drive Current

ƒ 8-Pin Small Outline Package (SOP)

Applications

ƒ Adapter

ƒ Ballast

ƒ LCD TV, CRT TV

ƒ SMPS