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This literature is subject to all applicable copyright laws and is not for resale in any manner.FL6630 Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving May 2015 FL6630 Single-Stage Primary-Side-Regulation PWM Controller for PFC and LED Dimmable Driving Features Description Compatible with Traditional TRIAC Control This highly integrated PWM controller, FL6630, provides (No need to change existing lamp infrastructure: several features to enhance the performance of single- wall switch & wire) stage flyback converters. The proprietary topology, TRUECURRENT , enables the simplified circuit design Compatible with Non-Dimming Lamp Designs for LED lighting applications. Cost-Effective Solution without Input Bulk Capacitor TRIAC dimming is smoothly managed by dimming and Feedback Circuitry brightness control without flicker. By using single-stage Power Factor Correction (PFC) topology with primary-side regulation, an LED lighting board can be implemented with few external Accurate Constant-Current (CC) Control, components and minimized cost. It does not require an Independent Online Voltage, Output Voltage, input bulk capacitor or feedback circuitry. To implement Magnetizing Inductance Variation good power factor and low total harmonic distortion, Line Voltage Compensation for CC Control constant on-time control is utilized with an external capacitor connected to the COMI pin. Linear Frequency Control for Better Efficiency and Simple Design Precise constant-current control regulates accurate output current versus changes in input voltage and Open-LED Protection output voltage. The operating frequency is proportionally Short-LED Protection changed by the output voltage to guarantee Discontinuous Conduction Mode (DCM) operation with Cycle-by-Cycle Current Limiting higher efficiency and simpler design. The FL6630 Over-Temperature Protection with Auto Restart provides protections such as open-LED, short-LED, and over-temperature protections. Current-limit level is Low Startup Current: 20 A automatically reduced to minimize output current and Low Operating Current: 5 mA protect external components in a short-LED condition. SOP-8 Package Available The FL6630 controller is available in an 8-pin Small Outline Package (SOP). Application Voltage Range: 80 V ~ 308 V AC AC Applications LED Lighting System Ordering Information Packing Part Number Operating Temperature Range Package Method FL6630MX -40C to +125C 8-Lead, Small Outline Package (SOP-8) Tape & Reel 2015 Fairchild Semiconductor Corporation www.fairchildsemi.com FL6630 Rev. 1.0