Design of a transformeless high power factor low frequency LED driver applied to street lighting

This paper presents a discussion about the use of a low frequency boost pre-regulator as offline LED driver and its application to a street lighting LED luminaire. This simple and low cost converter may provide high power factor, low input current distortion, high efficiency and compliance with IEC 61.000-3-2 Class C standard, which limits the emission of harmonic currents of lighting equipment. The analysis of the boost pre-regulator is revised. Computational simulation and experimental results are shown to an LED luminaire operating in 155W. In this case, no transformers and electrolytic capacitors are required, which define higher converter efficiency and an extended lifetime for this driver.