• DocumentCode
    735286
  • Title

    A 5.5W AC input converter-free LED driver with 82% low-frequency-flicker reduction, 88.2% efficiency and 0.92 power factor

  • Author

    Yuan Gao ; Lisong Li ; Mok, Philip K. T.

  • Author_Institution
    Dept. of ECE, Hong Kong Univ. of Sci. & Technol., Hong Kong, China
  • fYear
    2015
  • fDate
    17-19 June 2015
  • Abstract
    This paper presents a 95VAC-120VAC mains powered converter-free LED driver for general lighting application. A quasi-constant power control scheme is proposed to significantly reduce the low-frequency-flicker, combined with a valley fill circuit to maintain good power factor performance. The driver achieves 88.2% efficiency and 0.92 PF with only 18% flicker at 110VAC 60Hz input and does not require any magnetics or electrolytic capacitors.
  • Keywords
    driver circuits; flicker noise; interference suppression; light emitting diodes; lighting; power control; power factor; semiconductor device noise; AC input converter-free LED driver; frequency 60 Hz; lighting application; low-frequency-flicker reduction; power 5.5 W; power factor; quasiconstant power control scheme; valley fill circuit; voltage 95 V to 120 V; Capacitors; Light emitting diodes; Reactive power; Switching converters; Voltage control; Voltage fluctuations; Voltage measurement;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    VLSI Circuits (VLSI Circuits), 2015 Symposium on
  • Conference_Location
    Kyoto
  • Print_ISBN
    978-4-86348-502-0
  • Type

    conf

  • DOI
    10.1109/VLSIC.2015.7231293
  • Filename
    7231293
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=735286