Precise Analytical Solution for the Peak Gain of LLC Resonant Converters

Sung-Soo Hong; Sang-Ho Cho; Chung-Wook Roh; Sang-Kyoo Han

Precise Analytical Solution for the Peak Gain of LLC Resonant Converters

Vol. 10, No. 6, pp. 680-685, Nov. 2010

10.6113/JPE.2010.10.6.680

Holdup time

LLC resonant converter

mathematical analysis

Peak gain

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Abstract

Although LLC resonant converters have the advantages of a wide operation range and high efficiency, the lack of an analytical solution for the peak gain makes it difficult to optimize the resonant tank design, when considering not only the normal condition but also the holdup time requirement. In this paper, based on a mathematical analysis of a LLC resonant converter at the peak gain point, an analytical solution for the peak gain has been developed. By using the developed analytical solution, the peak gain with given resonant tank parameters can be obtained. To confirm the validity of the developed analytical solution, simulations and experimental results are compared.

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Cite this article

[IEEE Style]

S. Hong, S. Cho, C. Roh, S. Han, "Precise Analytical Solution for the Peak Gain of LLC Resonant Converters," Journal of Power Electronics, vol. 10, no. 6, pp. 680-685, 2010. DOI: 10.6113/JPE.2010.10.6.680.

[ACM Style]

Sung-Soo Hong, Sang-Ho Cho, Chung-Wook Roh, and Sang-Kyoo Han. 2010. Precise Analytical Solution for the Peak Gain of LLC Resonant Converters. Journal of Power Electronics, 10, 6, (2010), 680-685. DOI: 10.6113/JPE.2010.10.6.680.