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