Open AccessSingle soft switched isolated converter with constant output current for light emitting diode driver
Author(s) -
Amini Mohammad Reza,
Emrani Amin,
Adib Ehsan,
Farzanehfard Hosein
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.2013.0281
Subject(s) - constant current , constant (computer programming) , diode , current (fluid) , light emitting diode , optoelectronics , materials science , physics , electrical engineering , computer science , engineering , programming language
In this study, a single switch soft‐switching isolated converter for light emitting diode (LED) driver applications is introduced. In the proposed converter, the transformer parasitic elements are employed as resonant elements to transfer energy and to attain soft‐switching condition. The converter constant output current only depends on the input voltage, resonant capacitor, switching frequency and transformer turns ratio. Thus, the converter does not require any current feedback to regulate the LED current. In addition, the adjustment of light emission can be simply accomplished which results in cost reduction and system simplicity. Experimental results are presented to justify the validity of theoretical analysis.