High-efficiency two-stage LED driver with integrated PFC and LLC resonant converter for public lighting

Marref Mohammed Amine (University of Science and Technology of Oran Mohamed-Boudiaf (USTOMB))
Seyf Eddine Bechekir (Djillali Liabès University)
Mokhtaria Jbilou (Djillali Liabès University)
Mostefa Brahami (Djillali Liabès University)
Abdelber Bendaoud (University Djillali Liabes)

International Journal of Power Electronics and Drive Systems (IJPEDS)
Vol 17, No 2: June 2026

This paper presents the design, implementation, and experimental validation of a 150 W two-stage light-emitting diode (LED) driver integrating a power factor correction (PFC) stage and a half-bridge LLC resonant converter for public lighting applications. The problem addressed is the insufficient power quality, limited efficiency, and poor harmonic performance of conventional LED drivers used in street lighting. The proposed method combines an advanced PFC front-end with an LLC resonant converter optimized using first harmonic approximation (FHA) to achieve high efficiency, stable output regulation, and soft-switching operation. Experimental results demonstrate a significant improvement in power quality, with the input current total harmonic distortion (THD) reduced from 134% to 17%, a near-unity power factor, a regulated LED output of 31.6 V/4.72 A, and a conversion efficiency exceeding 95%. The significance of this work lies in providing a high-performance, standards-compliant driver that supports reliable, energy-efficient, and grid-friendly public lighting with reduced operational costs.