Dynamic Characteristics of DC-DC Converters Using Digital Filters

This paper presents the dynamic characteristics of buck and buck-boost dc-dc converters with digital filters. At first, the PID, the minimum phase FIR filter and the IIR filter controls are discussed in the buck dc-dc converter. Comparisons of the dynamic characteristics between the buck and buck-boost converters are then discussed. As a result, it is clarified that the superior dynamic characteristics are realized in the IIR filter method. In the buck converter, the undershoot is less than 2% and the transient time is less than 0.4ms. On the other hand, in the buck-boost converter, the undershoot is about 3%. However, the transient time is approximately over 4ms because the output capacitance is too large to suppress the output voltage ripple in this type of converter.

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Cite this article

[IEEE Style]

F. Kurokawa, M. Okamatsu, T. Ishibashi, Y. Nishida, "Dynamic Characteristics of DC-DC Converters Using Digital Filters," Journal of Power Electronics, vol. 9, no. 3, pp. 430-437, 2009. DOI: 10.6113/JPE.2009.9.3.430.

[ACM Style]

Fujio Kurokawa, Masashi Okamatsu, Taku Ishibashi, and Yasuyuki Nishida. 2009. Dynamic Characteristics of DC-DC Converters Using Digital Filters. Journal of Power Electronics, 9, 3, (2009), 430-437. DOI: 10.6113/JPE.2009.9.3.430.