Implementation of Multi Chanel Single Stage Constant Current Control Topology for LED Driver Application

Light-Emitting-Diode(LED) has become increasingly common in our daily lives for its high luminous efficacy, long lifetime, etc. The features of high luminous efficacy and long life make it use particularly attractive in applications such as street lighting, where costs associated with system maintenance and power consumption could be greatly decreased. In many applications, such as large-scale LCD panel backlighting, street lighting, tunnel lighting. In this proposed system. A novel multichannel constant current LED driver with a low cost and simple structure is proposed. which is composed of a high-frequency resonant ac/ac converter and as many passive LCL-T resonant rectifiers as the number of the output channels. The high frequency resonant ac/ac converter is focused on in this paper, which converts the ac-line input voltage into high frequency sinusoidal output voltage.