Ultrahigh Step-Down Converter

In this paper, an ultrahigh step-down converter is presented, which combines one coupled inductor and one energy-transferring capacitor. The corresponding voltage conversion ratio is much lower than that of the traditional synchronously rectified (SR) buck converter, and the proposed converter can achieve extremely low output voltage with an appropriate duty ratio. Moreover, there are three major merits in the proposed converter. One merit is that the voltage conversion ratio of the proposed converter is linear, thereby making control quite easy. Another merit is that if one of the switches fails or is abnormally controlled, a high voltage does not appear in the output terminal, so the output load can be protected. The other merit is that the proposed converter can be driven using the existing SR buck pulse-width modulation control integrated circuit. In this study, brief theoretical deductions and some experimental results are given to verify the feasibility and effectiveness of the proposed converter.

[1]  F. Lee,et al.  Novel non-isolated LLC resonant converters , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[2]  Sheng Ye,et al.  A Novel Non-Isolated Full Bridge Topology for VRM Applications , 2007, APEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition.

[3]  Wuhua Li,et al.  A Family of Interleaved DC–DC Converters DeducedFrom a Basic Cell With Winding-Cross-CoupledInductors (WCCIs) for High Step-Upor Step-Down Conversions , 2008, IEEE Transactions on Power Electronics.

[4]  F.C. Lee,et al.  A family of buck-type DC-DC converters with autotransformers , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[5]  K. I. Hwu,et al.  Resonant Voltage Divider With Bidirectional Operation and Startup Considered , 2012, IEEE Transactions on Power Electronics.

[6]  W. Eberle,et al.  A novel non-isolated ZVS asymmetrical buck converter for 12 V voltage regulators , 2008, 2008 IEEE Power Electronics Specialists Conference.

[7]  Yan-Fei Liu,et al.  A non-isolated ZVS self-driven current tripler topology for low voltage and high current applications , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[8]  F.C. Lee,et al.  Two-stage 48 V power pod exploration for 64-bit microprocessor , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[9]  Xinbo Ruan,et al.  A Family of Switching Capacitor Regulators , 2014, IEEE Transactions on Power Electronics.

[10]  F.C. Lee,et al.  12V VR Efficiency Improvement based on Two-stage Approach and a Novel Gate Driver , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[11]  Xinbo Ruan,et al.  Nonisolated Flyback Switching Capacitor Voltage Regulator , 2013, IEEE Transactions on Power Electronics.

[12]  I. Batarseh,et al.  Non-isolated Half Bridge Buck Based Converter for VRM Application , 2007, 2007 IEEE Power Electronics Specialists Conference.

[13]  Chih-Lung Shen,et al.  Interleaved soft-switching buck converter with coupled inductors , 2008, 2008 IEEE International Conference on Sustainable Energy Technologies.

[14]  Y. Darroman,et al.  Synthesis of Tapped-Inductor Switched-Mode Converters , 2007, IEEE Transactions on Power Electronics.

[15]  Yungtaek Jang,et al.  Multiphase buck converters with extended duty cycle , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[16]  F.C. Lee,et al.  Two-stage approach for 12-V VR , 2004, IEEE Transactions on Power Electronics.

[17]  Zhiliang Zhang,et al.  A 1-MHz, 12-V ZVS Nonisolated Full-Bridge VRM With Gate Energy Recovery , 2010, IEEE Transactions on Power Electronics.

[18]  Peng Xu,et al.  The active-clamp couple-buck converter-a novel high efficiency voltage regulator modules , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[19]  Byungcho Choi,et al.  New half-bridge dc-to-dc converters for wide input voltage applications , 2009, INTELEC 2009 - 31st International Telecommunications Energy Conference.

[20]  Yan-Fei Liu,et al.  A Nonisolated ZVS Asymmetrical Buck Voltage Regulator Module With Direct Energy Transfer , 2009, IEEE Transactions on Industrial Electronics.

[21]  Yanfei Liu,et al.  A novel nonisolated half bridge DC-DC converter , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[22]  K.W.E. Cheng,et al.  Tapped inductor for switched-mode power converters , 2006 .

[23]  Sheng Ye,et al.  A novel Non-Isolated Two-Phase Full Bridge topology for VRM applications , 2008, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.

[24]  E. Adib,et al.  A self powered gate drive circuit for tapped inductor buck converter , 2012, 2012 3rd Power Electronics and Drive Systems Technology (PEDSTC).

[25]  Jesus Leyva-Ramos,et al.  Control of high-step down voltage converters for voltage regulator modules , 2011, 2011 8th International Conference on Electrical Engineering, Computing Science and Automatic Control.

[26]  Wuhua Li,et al.  Application Summarization of Coupled Inductors in DC/DC Converters , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[27]  Hong Mao,et al.  Zero-voltage-switching (ZVS) two-stage approaches with output current sharing for 48 V input DC-DC converter , 2004, Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04..

[28]  B.-R. Lin,et al.  Analysis and implementation of a bidirectional converter with high conversion ratio , 2008, 2008 IEEE International Conference on Industrial Technology.

[29]  Sheng Ye,et al.  A New Transformer-Based Non-Isolated Topology Optimized for VRM Application , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.