Analysis and design of a half-bridge LLC series resonant converter employing two transformers

作者：Lo Yu Kang^*; Lin Jing Yuan; Lin Chung Yi

来源：International Journal of Circuit Theory and Applications, 2012, 40(10): 985-998.

DOI：10.1002/cta.767

• LLC series resonant converter
• low-profile design
• load current sharing

This paper presents a two-transformer LLC series resonant converter (SRC), which is derived from incorporating two identical converters. The proposed converter allows a low-profile power supply design for liquid crystal display (LCD) TVs and servers. The presented converter can equally share the total load current between two transformers and the output rectifier modules. Therefore, the heat problem can be effectively relieved. The steady-state analysis and design of this new two-transformer LLC SRC are described. The experimental results are recorded for a prototype converter with an output voltage of 12thinspaceV, an output power of 300?W, and a resonant frequency of 74?kHz.

• 出版日期2012-10