Fast response DC/DC converter with transient suppression circuit

S. K. Changchien, Tsorng-Juu Liang, Jiann-Fuh Chen, L. S. Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

17 Citations (Scopus)


This paper presents a novel scheme to improve the transient response of a DC/DC converter. Traditionally, a large output capacitor is used in the output of a DC/DC converter to improve transient response. However, it is costly, heavy and bulky. In this paper, the transient response of DC/DC converter can be improved by adding a coupled inductor and an auxiliary inductor. The proposed circuit configuration is very simple and the capacity of the capacitor can be minimized. A coupled inductor of the converter output filter inductor and a diode form an automatic energy feedback path to improve the full-to-low load transient response. An additional inductor is used to improve the low-to-full load transient response. The operating principle and the design criterion are addressed. Finally, an experimental prototype converter with 12V input voltage and 5V/3A output is given to verify the feasibility of the proposed scheme. Experimental results show that the low-to-full load transient response can be improved by 15% and the full-to-low load transient response is improved by 45%.

Original languageEnglish
Title of host publication37th IEEE Power Electronics Specialists Conference 2006, PESC'06
Publication statusPublished - 2006 Dec 1
Event37th IEEE Power Electronics Specialists Conference 2006, PESC'06 - Jeju, Korea, Republic of
Duration: 2006 Jun 182006 Jun 22

Publication series

NamePESC Record - IEEE Annual Power Electronics Specialists Conference
ISSN (Print)0275-9306


Other37th IEEE Power Electronics Specialists Conference 2006, PESC'06
Country/TerritoryKorea, Republic of

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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