Output characteristics of step-down (Buck) power converter

Bulletin of the Polish Academy of Sciences. Technical Sciences

W. JankeCorresponding authorDivision of Electronic Systems, Technical University of Koszalin, 2 ?niadeckich St., 75-453 Koszalin, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹  M. B?czekDivision of Electronic Systems, Technical University of Koszalin, 2 ?niadeckich St., 75-453 Koszalin, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  M. WalczakDivision of Electronic Systems, Technical University of Koszalin, 2 ?niadeckich St., 75-453 Koszalin, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1] Division of Electronic Systems, Technical University of Koszalin, 2 ?niadeckich St., 75-453 Koszalin, Poland

关键词: Keywords : DC-DC converters;    output characteristics;    load transients;   

DOI  :  10.2478/v10175-012-0086-6

学科分类：工程和技术（综合）

来源: Polska Akademia Nauk * Centrum Upowszechniania Nauki / Polish Academy of Sciences, Center for the Advancement of Science

【 摘 要 】

The output characteristics of switched-mode dc-dc buck power converter are discussed. The shape of output characteristics is especially important for converters used for supplying modern processors. An output impedance is usually used for description of output characteristics. Many efforts are described in the literature to obtain the satisfastory features of closed-loop output impedance. Another approach, presented in the paper, is based on the concept of the output voltage response corresponding to the load conductance change, and is expressed by hr transmittance. Simulations of output characteristics of the buck converter in frequency and in time-domain have been performed for the ideal case as well as for a more realistic situation, with the parasitic resistances of converter elements included. The measurement results differ substantially from characteristics calculated for an ideal converter and are in good consistency with simulations including parasitics.

【 授权许可】

Unknown