Description
The FL7930B 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
■ Additional OVP Detection Pin
■ VIN-Absent Detection
■ Maximum Switching Frequency Limitation
■ Internal Soft-Start and Startup without Overshoot
■ Internal Total Harmonic Distortion (THD) Optimizer
■ Precise Adjustable Output Over-Voltage Protection
■ Open-Feedback Protection and Disable Function
■ Zero Current Detector (ZCD)
■ 150 μs Internal Startup Timer
■ MOSFET Over-Current Protection (OCP)
■ Under-Voltage Lockout with 3.5 V Hysteresis
■ Low Startup and Operating Current
■ Totem-Pole Output with High State Clamp
■ +500/-800 mA 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, Ornamental LED Lighting Fixtures