Open AccessInput voltage controlled full‐bridge series resonant converter for LED driver application
Author(s) -
Kolla Hemasundara Rao,
Vishwanathan Neti,
Murthy Bhagwan K.
Publication year - 2020
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.2020.0554
Subject(s) - buck converter , voltage , converters , half bridge , power (physics) , electrical engineering , electronic engineering , engineering , capacitor , physics , quantum mechanics
In this study, a phase shift controlled full‐bridge series resonant converter (SRC) integrated with buck converters for light‐emitting diode (LED) driver application is proposed. This LED driver supplies four LED loads simultaneously. The current through LED loads is controlled by phase shift control of the SRC, and its output is added to the input voltage. Zero‐voltage switching (ZVS) switching of all the switches is achieved by operating the SRC at lagging power factor for all input voltage variations. As the only part of the output power is processed through the SRC and all the switches operating with ZVS, the efficiency of the converter is 95.7%, which is high. A 142 W LED driver is designed, and its performance is tested with PSPICE simulations and experimental prototype.