本論文提出實現高效率交換式電源轉換器設計架構，電路架構採用LLC同步整流半橋式諧振轉換器(LLC Half Bridge Resonant Converter with Synchronous Rectifier)。並且導入整合驅動電路及優化設計在同步整流器電路，補償同步整流輸入信號源及改善寄生元件影響，零電壓切換與同步整流技術實現最佳化效率，本論文詳細探討設計步驟與分析電路之動作原理。
電源轉換器實體實驗，詳細說明設計步驟與電路中重要元件值之規格，進而製作一台200W之LLC 半橋式串聯諧振轉換器，輸出電壓DC 12V，全機效率在滿載下高達97.6%。在10%至100%不同的負載情況之平均效率下可達95.7%。原型機實測、電氣功能與模擬結果相互驗證與理論預期相符。

This dissertation mainly aims to study the optimal design for half-bridge LLC resonant converter with synchronous rectifier. In order to further improve the efficiency and reliability, zero-voltage switching, compensated sensing of synchronous rectifier technologies and integrated drivers are adopted. Operating principles and design considerations are analyzed and discussed in detail.
The experimental results of a 12V/ 200W laboratory prototype are shown to verify the feasibility of the proposed scheme. The highest efficiency is achieved to 97.6% at 100% load. The average efficiency is achieved to 95.7% at 10% to 100% load conditions.

[1]P. Alou, J. A. Cobos, O. Garcia, R. Prieto, and J. Uceda, “A New Driving Scheme for Synchronous Rectifiers: Single Winding Self-driven Synchronous Rectification,” IEEE Trans. on Power Electronics, vol. 16, no. 6, pp. 803-811, Nov. 2001.
[2]R. Liu and C. Q. Lee, “Analysis and Design of LLC-type Series Resonant Convertor,” IET Electronic Letter, vol. 24, no. 24, pp. 1517-1519, Nov. 1988.
[3]H. J. Jiang, G. Maggetto, and P. Lataire, “Steady-state Analysis of the Series Resonant DC-DC Converter in Conjunction with Loosely Coupled Transformer-above Resonance Operation,” IEEE Trans. on Power Electronics, vol. 14, no. 3, pp. 469-480, May 1999.
[4]F. C. Schwarz, “A Method of Resonant Current Pulse Modulation for Power Converters,” IEEE Trans. on Power Electronics, vol. 17, no. 3 pp. 209-221, May 1970.
[5]F. C. Lee, “High-frequency Quasi-resonant Converter Technologies,” in Proc. IEEE APEC Conf., 1988, vol. 76, no. 4, pp. 377-390.
[6]G. Hua and F.C. Lee, "Soft-switching Techniques in PWM Converters," IEEE Trans. on Industrial Electronics, vol. 42, no. 6, pp. 595-603, Dec. 1995.
[7]J. G. Cho, J. A. Sabate, G. Hua, and F. C. Lee, “Zero-voltage and Zero-current-switching Full Bridge PWM Converter for High-power Applications”, IEEE Trans. on Power Electronics, vol. 11, no. 4, pp.622-628, Jul. 1996.
[8]K. H. Liu and F. C. Lee, “Zero-Voltage Switching Technique in DC/DC Converters”, IEEE Trans. on Power Electronics, vol 5, no. 3, pp. 293-304, Jul 1990.
[9]X.Wu, G. Hua, J. Zhang, and Z. Qian, “A New Current Driven Synchronous Rectifier for Series-parallel Resonant (LLC) DC–DC Converter,” IEEE Trans. on Industrial Electronics, vol. 58, no. 1, pp. 289-297, Jan. 2011.
[10]J. A. Cobos and J. Sebastian, “Study of the Applicability of Self-driven Synchronous Rectification to Resonant Topologies”, in Proc. IEEE PESC Conf., 1992, pp.933-940.
[11]D. Fu, Y. Liu, F. C. Lee, and M. Xu, “A Novel Driving Scheme for Synchronous Rectifiers in LLC Resonant Converters,” IEEE Trans. on Power Electronics, vol. 24, no. 5, pp. 1321-1329, May 2009.
[12]B. R. Lin, L. A. Lin, Y. J. Chiang, and P. L. Chen, “Series Resonant Converter with Output Voltage Doubler”, in Proc. IEEE TENCON Conf., 2010, pp.1823-1828.
[13]B. R. Lin, W. R. Yang, J. J. Chen, C. L. Huang, and M. H. Yu, “Interleaved LLC Series Converter with Output Voltage Doubler”, in Proc. IEEE IPEC. Conf., 2010, pp.92-98.
[14]H. S. Chang, B. H. Lee, H. N. Park, J. D. La, and Y. S. Kim, “Design of Dual Output LLC Resonant Converter for a High-Power LED Lamp”, in Proc. IEEE ICEMS Conf., 2012, pp. 1-4.
[15]B. R. Lin, P. L. Chen, and C. L. Huang, “Analysis of LLC Converter with Series-Parallel Connection”, in Proc. IEEE ICIEA Conf., 2010, pp. 346-351.
[16]H. Pan, Y. C. Liang, and R. Oruganti, “Design of Smart Power Synchronous Rectifier” IEEE Trans. on Power Electronics, vol. 24, no. 5, pp. 308-315, May 1999.
[17]Q. Zhao and G. Stojcic, “Design Considerations for A New Generation Midvoltage Power MOSFET Technology”, in Proc. IEEE APEC Conf., 2005, pp. 336-342.
[18]Dianbo Fu, Bing Lu, and F.C. Lee, “1 MHz High Efficiency LLC Resonant Converters with Synchronous Rectifier” in Proc. IEEE PSEC Conf., 2007, pp. 2404 – 2410.
[19]B. Y. Chen and Y. S. Lai, “Switching Control Technique of Phase-shift-controlled Full-bridge Converter to Improve Efficiency under Light-load and Standby Conditions without Additional Auxiliary Components,” IEEE Trans. on Power Electronics, vol. 25, no. 4, pp.1001-1012, Apr. 2010.
[20]M. Rodriguez, A. Rodriguez, P. F. Miaya, D. G. Lamar, and J. S. Zuniga, “An Insight into the Switching Process of Power MOSFETS: an Improved Analytical Losses Model,” IEEE Trans. on Power Electronics, vol. 25, no. 6, pp. 1626-1640, Jun. 2010.
[21]H. S. Choi and D.Y Huh, “Techniques to Minimize Power Consumption of SMPS in Standby Mode,” in Proc. IEEE Power Electronics Specialists Conf., 2005, pp. 2817-2822.
[22]徐維利，“同步整流式LLC串聯半橋諧振轉換器之研製”，國立台灣科技大學電子工程系研究所碩士論文，民國95年。
[23]H. D. Groot, E. Janssen, R. Pagano, and K. Schetters, “Design of a 1 MHz LLC Resonant Converter based on a DSP-driven SOI Half-Bridge Power MOS Module,” in Proc. Power Electronics Specialists Conf., 2006, pp. 1-14.
[24]A. K. S. Bhat, “Analysis and Design of LCL-type Series Resonant Converter”, in Proc. IEEE Telecommunications Energy Conf., 1994, pp. 118-124.
[25]B. Yang, F. C. Lee, A. J. Zhang, and G. Huang, “LLC Resonant Converter for Front End DC/DC Conversion”, in Proc. IEEE APEC Conf., 2002, pp. 1108-1112.
[26]B. Yang, Rengang. Chen, and F. C. Lee, “Integrated Magnetic for LLC Resonant Converter”, in Proc. IEEE APEC Conf., 2002, pp. 346-351.
[27]R. Liu, C. Q. Lee, and A.K. Upadhyay, “Experimental Study of the LLC-type Series Resonant Converter”, in Proc. IEEE APEC Conf., 1991, pp. 31-37.
[28]S. De. Simone, C. Adragna, C. Spini, and G. Gattavari, “Design-oriented Steady State Analysis of LLC Resonant Converters Based on FHA”, in Proc. IEEE PESC Conf., 2006, pp. 200-207.
[29]A. J. Forsth, G.. A. Ward, and S.V. Mollov, ”Extended Fundamental Frequency Analysis of the LCC Resonant Converter”, IEEE Trans. on Power Electronics, vol.18, no. 4, pp. 1286-1292 , Nov. 2003.
[30]R. L. Steigerwald, “A Comparison of Half Bridge Resonant Converter Topologies”, IEEE Trans. on Power Electronics, vol.3, pp.174 -182, Apr. 1988.
[31]T. Duerbaum, “First Harmonic Approximation including Design Constraints,” in Proc. IEEE Telecommunications Energy Conf., 1998, pp.321-328.
[32]C. Adragna, S. De Simone, and C. Spini, “A Design Methodology for LLC Resonant Converters based on Inspection of Resonant Tank Currents”, in Proc. IEEE Applied Power Electronics Conf., 2008, pp. 1361-1367.
[33]B. Lu, W. Liu, Y. Liang, F. C. Lee, and J. D. van Wyk, “Optimal Design Methodology for LLC Resonant Converter,” in Proc. IEEE APEC Conf., 2006, pp. 533-538.
[34]J. H. Jung, J. M. Choi, and J. G. Kwon, “Design Methodology for Transformers including Integrated and Center-tapped Structures for LLC Resonant Converters,” IEEE Trans. on Power Electronics, vol. 9, no. 2, pp. 215-223, Mar. 2009.
[35]Y. Fang, D. Xu, Y. Zhang, F. Gao and L. Zhu, “Design of High Power Density LLC Resonant Converter with Extra Wide Input Range”, in Proc. IEEE APEC Conf., 2007, pp. 976-981.
[36]C. R. Sullivan, “Optimal Choice for Number of Strands in a Litz-wire Transformer Winding”, IEEE Trans. on Power Electronics, vol. 14, no. 2, pp. 283-291, Mar. 1999.
[37]ENERGY STAR Partnership Agreement., “ENERGY STAR Program Requirements for Computers, Version 4.0” , July, 2007.