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Active and Passive Electronic Components
Volume 2017, Article ID 2365848, 5 pages
https://doi.org/10.1155/2017/2365848
Research Article

A New Capacitor-Less Buck DC-DC Converter for LED Applications

Electrical Engineering Department, Faculty of Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia

Correspondence should be addressed to Munir Al-Absi; as.ude.mpufk@bialukm

Received 8 November 2016; Revised 23 December 2016; Accepted 28 December 2016; Published 17 January 2017

Academic Editor: Mingxiang Wang

Copyright © 2017 Munir Al-Absi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this paper, a new capacitor-less DC-DC converter is proposed to be used as a light emitting diode (LED) driver. The design is based on the utilization of the internal capacitance of the LED to replace the smoothing capacitor. LED lighting systems usually have many LEDs for better illumination that can reach multiple tens of LEDs. Such configuration can be utilized to enlarge the total internal capacitance and hence minimize the output ripple. Also, the switching frequency is selected such that a minimum ripple appears at the output. The functionality of the proposed design is confirmed experimentally and the efficiency of the driver is 85% at full load.