Open AccessBuck converter‐based power supply design for low power light emitting diode lamp lighting
Author(s) -
Singh Bhim,
Shrivastava Ashish
Publication year - 2014
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2013.0391
Subject(s) - led lamp , power (physics) , light emitting diode , buck converter , diode , materials science , optoelectronics , electrical engineering , engineering , physics , quantum mechanics
This study deals with the analysis and implementation of an HPF (high power factor) single‐stage, single switch buck converter‐based power supply design for an LED (light emitting diode) lamp load of 13 W operated at the universal ac mains. In general purpose lighting applications, a buck converter is a good candidate for power factor correction with low component count and reduced cost. In low‐power lighting, it is a tough task to control the THD i (total harmonic distortion) of ac mains current under the limits of strict international standards such as IEC‐61000‐3‐2 with universal ac mains for class D equipments. In the proposed optocouplerless topology, HPF operation at input ac mains is achieved by operating the buck ac–dc converter in continuous conduction mode. The design, modelling and simulation of the proposed topology are executed using MATLAB‐Simulink and sim‐power system toolboxes. A prototype of the power supply for LED lamp is developed for multiple LEDs connected in series configuration. The efficiency of the proposed LED lamp driver is observed as 83.76% at rated voltage of 220 V and the THD of ac mains current less than 17.27% for a wide range of voltages of 90–270 V.