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