• DocumentCode
    1762048
  • Title

    Prediction of Subharmonic Oscillation in {\\bf{\\rm I}^2} Controlled Buck Converters in CCM

  • Author

    Chung-Chieh Fang

  • Author_Institution
    Sunplus Technol., Hsinchu, Taiwan
  • Volume
    30
  • Issue
    7
  • fYear
    2015
  • fDate
    42186
  • Firstpage
    4035
  • Lastpage
    4036
  • Abstract
    A recent paper proposed I2 average-current control with constant switching period (CSP) or constant on-time (COT) operation in continuous conduction mcontinuous conduction modeode (CCM). The small-signal analysis was presented, but only for the COT case. No instability or its condition was reported. In this note, unified subharmonic oscillation conditions are derived for both CSP and COT buck converters. The effects of feedback gain, turn-off delay, and stabilizing ramp slope are considered. The results can be extended to other converters or control schemes.
  • Keywords
    electric current control; harmonic oscillators; power convertors; stability; CCM; COT buck converters; CSP; I2 average-current control; I2 controlled buck converters; buck converters; constant on-time operation; constant switching period; feedback gain; stabilizing ramp slope; subharmonic oscillation prediction; turn-off delay; Delays; Electronic mail; Generators; Oscillators; Stability analysis; Switches; Critical condition; critical condition; instability; subharmonic oscillation;
  • fLanguage
    English
  • Journal_Title
    Power Electronics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0885-8993
  • Type

    jour

  • DOI
    10.1109/TPEL.2014.2361636
  • Filename
    6917037
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1762048