Premium
LED dimming technique without frequency and pulse width modulations
Author(s) -
Borekci Selim,
Acar Nihal C.,
Kircay Ali
Publication year - 2018
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2523
Subject(s) - pulse width modulation , pulse frequency modulation , power (physics) , electronic engineering , modulation (music) , diode , light emitting diode , frequency modulation , electrical engineering , pulse (music) , materials science , physics , voltage , engineering , pulse amplitude modulation , acoustics , radio frequency , quantum mechanics
Summary In this paper, a novel dimmable light‐emitting diode (LED) driver is implemented by a series‐parallel resonant converter. Variable resonant inductor is used for dimming purposes. This technique is not requiring switching frequency variation or pulse width modulation, unlike commonly used techniques. The proposed technique is implemented on 40 one‐watt series connected power LEDs at 60‐kHz constant switching frequency. The experimental results show that LEDs can be dimmed to a desired power level within the range of nominal and low power.