High Efficiency Converter with PFC Demonstration Board

The STM-STEVAL-ILL052V1 demonstration board implements a 130 W LED power supply for street lighting. The circuit is composed of two stages: a front-end PFC using the L6562AT and an LLC resonant converter based on the L6599AT. What distinguishes this design is its very high efficiency, extended European input mains range (177-277 VAC) operation, and long-term reliability. Because reliability MTBF (mean time between failures) in power supplies is typically affected by the high failure rate of electrolytic capacitors, unless using very high-end, expensive types, the STEVAL-ILL052V1 demonstration board offers an innovative design approach using film capacitors from EPCOS in place of electrolytic capacitors. Thanks to the high efficiency achieved, no heatsinks are required. Extended European input mains range: 177 to 277 VAC - frequency 45 to 55 Hz Output voltage: 48 V at 2.7 A Long-life electrolytic capacitors not used Mains harmonics: in accordance with EN61000-3-2 Class C Efficiency at full load: greater than 90% EMI: in accordance with EN55022 Class B Safety: double insulation, in accordance with EN60950, SELV Dimensions: 75 x 135 mm, 30 mm maximum component height No heatsinks needed PCB: single side, 35 µm, FR-4, mixed PTH/SMT RoHS compliant