Description

The FL7930 is an active Power Factor Correction (PFC) controller for low-to high-power lumens 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

■ Additional PFC-Ready Function (FL7930C Only)

■ Input-Voltage-Absent-Detection Circuit

■ Maximum Switching Frequency Limitation

■ Internal Soft-Start with Overshoot Prevention

■ Internal Total Harmonic Distortion (THD) Optimizer

■ Precise Adjustable Output Over-Voltage Protection

■ Additional OVP Detection Pin (FL7930B Only)

■ Open-Feedback Protection and Disable Function

■ Zero-Current Detector

■ 150µs Internal Startup Timer

■ MOSFET Over-Current Protection (OCP)

■ Under-Voltage Lockout with 3.5V Hysteresis

■ Low Startup and Operating Current

■ Totem-Pole Output with High State Clamp

■ +500/-800mA Peak Gate Drive Current

■ 8-Pin Small Outline Package (SOP)

Applications

■ Ballast

■ General LED Lighting

■ Industrial, Commercial, and Residential Fixtures

■ Outdoor Lighting: Street, Roadway, Parking, Construction and Ornamental LED Lighting Fixtures