Critical output‐capacitor ESR for stability of  V  2  controlled buck converter in CCM and DCM | Zendy

Zhou Guohua | Zendy; He Shengzong | Zendy; Zhang Xi | Zendy; Zhong Shu | Zendy

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Critical output‐capacitor ESR for stability of V 2 controlled buck converter in CCM and DCM

Author(s) -

Zhou Guohua,

He Shengzong,

Zhang Xi,

Zhong Shu

Publication year - 2014

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

eISSN - 1350-911X

pISSN - 0013-5194

DOI - 10.1049/el.2014.0419

Subject(s) - capacitor , buck converter , stability (learning theory) , physics , control theory (sociology) , materials science , voltage , computer science , power (physics) , thermodynamics , quantum mechanics , control (management) , artificial intelligence , machine learning

It has been reported that subharmonic instability exists in the V 2 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 stabiiity of a V 2 controlled buck converter in CCM and DCM is investigated by using the discrete‐time model and verified by circuit simulations.

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