• DocumentCode
    55836
  • Title

    Critical output-capacitor ESR for stability of V2 controlled buck converter in CCM and DCM

  • Author

    Guohua Zhou ; Shengzong He ; Xi Zhang ; Shu Zhong

  • Author_Institution
    Sch. of Electr. Eng., Southwest Jiaotong Univ., Chengdu, China
  • Volume
    50
  • Issue
    12
  • fYear
    2014
  • fDate
    June 5 2014
  • Firstpage
    884
  • Lastpage
    886
  • Abstract
    It has been reported that subharmonic instability exists in the V2 controlled buck converter in continuous conduction mode (CCM) when the duty ratio is above 0.5 (D > 0.5) and no stability issue exists in discontinuous conduction mode (DCM) when 0 <; D <; 1. However, the CCM and DCM instabilities will appear in the safe duty ratio range when the equivalent series resistance (ESR) of the output capacitor is below a critical value. The critical output-capacitor ESR for the stability of a V2 controlled buck converter in CCM and DCM is investigated by using the discrete-time model and verified by circuit simulations.
  • Keywords
    capacitors; circuit stability; discrete time systems; power convertors; CCM; DCM; V2 controlled buck converter; circuit simulation; continuous conduction mode; critical output-capacitor ESR; discontinuous conduction mode; discrete-time model; equivalent series resistance; stability; subharmonic instability;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el.2014.0419
  • Filename
    6836731
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=55836