Analysis, design, and experimentation of the active hybrid‐series‐parallel PWM dimming scheme for high‐efficient off‐line LED drivers

  1. Abdelmessih, Guirguis Z. 2
  2. Alonso, José Marcos 2
  3. Dalla Costa, Marco A. 1
  1. 1 Federal University of Santa MariaGroup of Intelligence in Lighting (GEDRE)Santa MariaBrazil
  2. 2 Electrical Engineering DepartmentUniversity of OviedoCampus de ViesquesGijonSpain
IET Power Electronics

ISSN: 1755-4543

Ano de publicación: 2019

Volume: 12

Número: 7

Páxinas: 1697-1705

Tipo: Artigo

DOI: 10.1049/IET-PEL.2018.6142 GOOGLE SCHOLAR

Outras publicacións en: IET Power Electronics


Citas recibidas

  • Citas en Scopus: 9 (19-09-2023)
  • Citas en Web of Science: 7 (15-09-2023)
  • Citas en Dimensions: 9 (15-03-2023)

JCR (Journal Impact Factor)

  • Ano 2019
  • Factor de impacto da revista: 2.672
  • Factor de impacto sen autocitas: 2.0
  • Article influence score: 0.628
  • Cuartil maior: Q2
  • Área: ENGINEERING, ELECTRICAL & ELECTRONIC Cuartil: Q2 Posición na área: 113/266 (Edición: SCIE)

SCImago Journal Rank

  • Ano 2019
  • Impacto SJR da revista: 0.998
  • Cuartil maior: Q1
  • Área: Electrical and Electronic Engineering Cuartil: Q1 Posición na área: 132/1832

Scopus CiteScore

  • Ano 2019
  • CiteScore da revista: 5.5
  • Área: Electrical and Electronic Engineering Percentil: 81

Journal Citation Indicator (JCI)

  • Ano 2019
  • JCI da revista: 0.9
  • Cuartil maior: Q2
  • Área: ENGINEERING, ELECTRICAL & ELECTRONIC Cuartil: Q2 Posición na área: 101/318


(Datos actualizados na data de 15-03-2023)
  • Total de citas: 9
  • Citas recentes: 4
  • Field Citation Ratio (FCR): 3.1


This study presents a high power factor (PF) light-emitting diode (LED) driver featuring a pulse width modulation (PWM) dimming technique. The integrated buck-flyback-buck converter (IBFBC) is built by connecting a buck converter to the integrated buck-flyback converter's output. The IBFBC ensures a constant output current regulation as well as high PF at all dimming ratios. The purpose of the output buck converter is to clear up the discontinuous power operation created by the PWM dimming. This occurs when the buck converter absorbs the output power, at LED switched-off, and sends it back to the input. Thus, the IBFBC maintains the operational enhancement shown by the hybrid-series-parallel (HSP)-PWM technique, ensuring greater efficiency. This study explains the operating principles of the IBFBC using circuit diagrams as well as an average model for the entire converter. Moreover, the study presents a mathematical analysis of the IBFBC power flow. It provides guidance on how to select the optimum value for the output buck inductance. A 230V, 50Hz input, 160V output, 100W AC–DC converter operating at 100 kHz has been implemented. The prototype is fully tested to demonstrate the active HSP-PWM technique. An efficiency ranging 50–86% corresponding to the dimming ratio of 5–100% is reached, where 5% dimming refers to an output power of 4W.