Open AccessDesign a Single Stage AC to DC Converter for LED Driver With Power Factor Improvement
Author(s) -
George Fernandez
Publication year - 2019
Publication title -
international journal of recent technology and engineering
Language(s) - English
Resource type - Journals
ISSN - 2277-3878
DOI - 10.35940/ijrte.b1559.0982s1119
Subject(s) - flyback converter , power factor , boost converter , snubber , flyback transformer , buck converter , buck–boost converter , electrical engineering , capacitor , forward converter , ćuk converter , switched mode power supply , flyback diode , engineering , electronic engineering , voltage , transformer
This paper shows the design of a single switch LED driver circuit which is based on the operation of boost converter and flyback converter with power factor correction. In the proposed driver circuit, the boost converter is made to operate in DCM mode for achieving a high power factor and the flyback converter is used for isolating the input-output in order to provide safety. In addition to this, a snubber circuit is also designed for clamping the peak voltage of the main switch into low voltage and also to recycle the leakage inductor energy. A capacitor of low-voltage rating is made to function as the DC bus capacitor due to reason that some amount of the input power is conducted directly towards the output side; the amount of power remaining is then stored in the DC bus capacitor. In this way, the proposed LED driver circuit provides a power factor of greater value, i.e., above 0.95 PF and also a high value of power conversion efficiency, i.e., above 90%.