DCM operation analysis of KY converter. Issue 24 (5th November 2015)

• Record Type: Journal Article
• Authors: Zeng, Wen‐Liang; Lam, Chi‐Seng; Zheng, Wen‐Ming; Sin, Sai‐Weng; Dai, Ning‐Yi; Wong, Man‐Chung; U, Seng‐Pan; Martins, Rui Paulo
• Is Part Of: Electronics letters. Volume 51:Issue 24(2015)
• Page Start: 2037
• Page End: 2039
• Publication Date: 2015-11-05
• Subjects: integrated circuit design -- power convertors -- equivalent circuits -- transient response; discontinuous‐conduction mode operation analysis -- KY converter -- nonpulsating output current -- low output voltage ripple -- right‐half plane zero -- buck–boost converters -- integrated circuit -- discontinuous conduction mode -- DCM -- MATLAB -- Cadence; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2015.2241
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A KY converter has the characteristics of non‐pulsating output current, low‐output voltage ripple and no right‐half plane zero in continuous conduction mode which can overcome the drawbacks of the conventional boost and buck–boost converters. However, when the KY converter is implemented into an integrated circuit, its discontinuous conduction mode (DCM) operation cannot be avoided due to a small‐inductor value. The boundary for the DCM operation region, DCM dc voltage and small‐signal transfer functions are proposed, which fill the gap of the DCM operation theory for the KY converter. Simulation results, using MATLAB and Cadence, are provided to verify the deduced DCM operation theory of the KY converter. The DCM closed‐loop controller design can be achievable in future.