FL7930

FL7930 — Single-Stage Flyback and Boundary-Mode PFC Controller for Lighting March 2011 FL7930 Single-Stage Flyback and Boundary-Mode PFC Controller for Lighting 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) 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. FL7930 provides over-voltage, open-feedback, overcurrent, input-voltage-absent detection, and undervoltage lockout protections. The FL7930 can be disabl...