High-efficiency and low-cost tightly-regulated dual-output LLC resonant converter

A new high-efficiency and cost-effective dualoutput LLC resonant converter is proposed in this paper. The proposed converter can get tightly regulated dual-output voltages by adding only one auxiliary switch and PWM IC to conventional LLC resonant converter. Therefore, it features a simpler structure, less mass, and lower cost of production. Furthermore, since all power switches are turned on or off under zero-voltage switching (ZVS) or zero-current switching (ZCS), it has several favorable advantages such as high-efficiency, low switching loss, improved electromagnetic interference (EMI), and reduced burden on the cooling system. This paper presents a dual-output LLC resonant converter applicable to the PDP TV power supply. The proposed converter achieves maximum power conversion efficiency of 96.5% at full load condition. The operational principle, theoretical analysis, and design considerations are presented. Also, to confirm the operation, validity and features of the proposed converter, experimental results from a 420W, 200Vdc/50Vdc prototype are presented.

[1]  Gun-Woo Moon,et al.  Novel Two-Phase Interleaved LLC Series-Resonant Converter Using a Phase of the Resonant Capacitor , 2009, IEEE Transactions on Industrial Electronics.

[2]  Xiaogao Xie,et al.  Analysis and Optimization of LLC Resonant Converter With a Novel Over-Current Protection Circuit , 2005, IEEE Transactions on Power Electronics.

[3]  Junming Zhang,et al.  A New Current-Driven Synchronous Rectifier for Series–Parallel Resonant ( $LLC$) DC–DC Converter , 2011, IEEE Transactions on Industrial Electronics.

[4]  Bor-Ren Lin,et al.  Analysis and implementation of dual-output LLC resonant converter , 2008, ICIT 2008.

[5]  R Beiranvand,et al.  Optimizing the Normalized Dead-Time and Maximum Switching Frequency of a Wide-Adjustable-Range LLC Resonant Converter , 2011, IEEE Transactions on Power Electronics.

[6]  Bizhan Rashidian,et al.  Using LLC Resonant Converter for Designing Wide-Range Voltage Source , 2011, IEEE Transactions on Industrial Electronics.

[7]  Feng Tian,et al.  High Efficiency Parallel Post Regulator for Wide Range Input DC–DC Converter , 2008, IEEE Transactions on Power Electronics.

[8]  Yan Liang,et al.  Optimal design methodology for LLC resonant converter , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[9]  Gun-Woo Moon,et al.  LLC Resonant Converter With Adaptive Link-Voltage Variation for a High-Power-Density Adapter , 2010, IEEE Transactions on Power Electronics.

[10]  Jun-Young Lee,et al.  An Isolated DC/DC Converter Using High-Frequency Unregulated $LLC$ Resonant Converter for Fuel Cell Applications , 2011, IEEE Transactions on Industrial Electronics.

[11]  G.H. Cho,et al.  A new ZVS DC/DC converter with fully regulated dual outputs , 1993, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93.

[12]  Jorge L. Duarte,et al.  Disturbance Observer-Based Control of a Dual-Output LLC Converter for Solid-State Lighting Applications , 2011 .

[13]  Y.-L. Lin,et al.  A new synchronous-switch post regulator for multi-output forward converters , 1990, Fifth Annual Proceedings on Applied Power Electronics Conference and Exposition.

[14]  Jee-hoon Jung,et al.  Theoretical analysis and optimal design of LLC resonant converter , 2007, 2007 European Conference on Power Electronics and Applications.

[15]  Xinbo Ruan,et al.  Hybrid Full-Bridge Three-Level LLC Resonant Converter- A Novel DC-DC Converter Suitable for Fuel Cell Power System , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[16]  M. Pietrzak-David,et al.  Weighted Control of Traction Drives With Parallel-Connected AC Machines , 2006, IEEE Transactions on Industrial Electronics.

[17]  Zhengyu Lu,et al.  High Cross-Regulation Multioutput $LLC$ Series Resonant Converter With Magamp Postregulator , 2011, IEEE Transactions on Industrial Electronics.

[18]  G. Levin,et al.  A new secondary side post regulator (SSPR) PWM controller for multiple output power supplies , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[19]  Wei Tang,et al.  A new control method for synchronous-switch post regulator , 2000, 2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018).

[20]  H. E. Tacca,et al.  Single-switch two-output flyback-forward converter operation , 1998 .

[21]  E. Janssen,et al.  Design of a 1-MHz LLC Resonant Converter Based on a DSP-Driven SOI Half-Bridge Power MOS Module , 2007 .

[22]  M.R. Zolghadri,et al.  Designing an Adjustable Wide Range Regulated Current Source , 2010, IEEE Transactions on Power Electronics.

[23]  Zheng-yu Lu,et al.  Multi-output LLC Resonant Converters With Symmetrical Auxiliary Output Structures , 2006, INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference.

[24]  A. Bouscayrol,et al.  Weighted control of drives with series connected DC machines , 2003, IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03..