FAN7930BM

临界导通模式PFC控制器 Critical Conduction Mode PFC Controller

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