Control Strategy for Input-Parallel Output-Parallel DC/DC Converters with Output Current Sharing


Article Preview

This paper presents a digital control strategy for Input-Parallel Output-Parallel (IPOP) DC/DC converters system. The IPOP system is based on two phase-shifted full-bridge (PS-FB) converters whose output current is not equally shared due to parameter differences of each module. The control objective is to obtain output current equally sharing. Small signal model is built to analyze the system stability. Effectiveness of the control strategy is verified by simulation and experiment results.



Edited by:

Mohamed Othman




B. Han et al., "Control Strategy for Input-Parallel Output-Parallel DC/DC Converters with Output Current Sharing", Applied Mechanics and Materials, Vols. 229-231, pp. 2213-2216, 2012

Online since:

November 2012




[1] Yuehui Huang, Chi K. Tse. Circuit Theoretic Classification of Parallel Connected DC–DC Converters., IEEE Trans. Circuits and systems, Vol. 54, NO. 5, pp.1099-1108. MAY (2007).


[2] P. Li, B. Lehman, A design method for paralleling current mode controlled DC–DC converters, IEEE Trans. Power Electron, vol. 19, no. 3, p.748–756, May (2004).


[3] Y. Panov, M. M. Jovanoiv, Stability and dynamic performance of current-sharing control for paralleled voltage regulator modules, IEEE Trans. Power Electron, vol. 17, no. 2, p.172–179, Mar. (2002).


[4] Lian-qing Zheng, Shi-hua Zhao, Research on novel input-paralleled output-paralleled half-bridge converter, International Conference of Electrical Machines and Systems, (2008).

[5] R.W. Erickson, D. Maksimovic, Fundamentals of Power Electronics, 2nd ed. Boston, MA: Kluwer, (2001).