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Energy optimization of low power LED drivers in indoor lighting

O. F. FARSAKOGLU1, H. Y. HASIRCI1,*

Affiliation

  1. Department of Electrical and Electronics Engineering, Faculty of Engineering and Architecture, Kilis 7 Aralik University, Kilis 79000, Turkey

Abstract

With the increasing world's population, the need for the energy rises quite fast. From this perspective, restricted energy resources are considered as sufficient to satisfy the energy demand. Taken these issues into account, the resources to meet the energy demand must be created. Furthermore, the existing energy must be used efficiently, which makes the energy saving more important. In this case, the energy saving in lighting is also quite important. The energy consumed for lighting makes up the 20 % of the total consumed electrical energy. With this purpose, more efficient lighting components should be used. Power LEDs are currently manufactured as an alternative lighting source to conventional lighting used at present. A constant current is required for operation of power LEDs. In the present study, the current limited low power LED drivers were examined. For this aim, three different current driving circuits were investigated in terms of their powers. First circuit is a basic driving circuit with a resistance. Second circuit is a LED driving circuit with LM117 regulator, and third one is a current limiting LED driver circuit based on the DC-DC buck converter. Simulations of the current limiting LED driving circuits based on the DC-DC buck converter were prepared. The data from the simulation applications were obtained. Then, the circuit applications were conducted under laboratory conditions. The input current, the total loss, the output power, and the output current of the circuit were measured. The data of output current of these drive circuits were examined in terms of the energy optimization. Efficiencies of these circuits were obtained at the result of simulation and laboratory measurements..

Keywords

Power LED drivers, lighting efficiency, energy optimization.

Submitted at: April 10, 2015
Accepted at: May 7, 2015

Citation

O. F. FARSAKOGLU, H. Y. HASIRCI, Energy optimization of low power LED drivers in indoor lighting, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 5-6, pp. 816-821 (2015)