A wide range constant current LED driver with improved power quality and zero standby

摘要

This paper presents a high power factor low THD (total harmonic distortion) constant current LED (light emitting diode) driver for wide range input voltage application (90V-300VAC). LED driver is regulated for wide range LED string voltage (60V-105V) and constant LED current (0.7A) for entire load and line cycle. This design is suitable for 50W-90W LED driver for outdoor street lighting application. The power factor and THD meet IEC61000-3-2 Class C regulation for lighting. The overall power conversion efficiency, standby and no-load power consumption of LED driver meet ENERGYSTAR? norms. This solution is useful for smart city applications for LED street lighting in wide voltage range. The board is compact in size so as to fit into existing commercially available LED extrusions for LED streetlights. All protection features like LED open and short are present in the proposed solution.