Design of an Off-Line LED Driver Based on the Interleaved BCM Boost PFC and the LLC Converter with Active Ripple Compensation

This work presents the study of an off-line LED driver based on the integration of the BCM boost Power Factor Pre-regulator (PFC) and the LLC converter for Power Control (PC) operating with frequency-based Active Ripple Compen-sation (ARC). This technique is based on the modulation of the switching frequency, which allows for reduction of the converter bulk capacitance, improving the driver lifespan and reducing its volume. Furthermore, design abacuses have been proposed to facilitate the sizing of converter components based on the selected average value and ripple level of the LED current. Simulation results were performed on a 96-W LED lamp powered by a 220-V 60-Hz grid, and the frequency-based ARC yielded a capacitance reduction of 81.6%.