A Hybrid Multitrack-Sigma Converter with Integrated Transformer for Wide Input Voltage Regulation

This paper presents a hybrid multitrack converter with the capability of partial power regulation. This converter incorporates the merits of the Multitrack converter and Sigma converter. The input power is distributed and transferred by a DC transformer (DCX) and a two-stage circuit, whose front stage is a PWM converter to realize voltage regulation and the next stage works as DCX. The two DCXs are integrated into one transformer. The proposed converter realizes reduced device ratings, partial power regulation and integrated transformer. A 32-75V input, 5V, 20A output isolated dc-dc converter for data center applications is built to verify the effectiveness of the proposed circuit structure. The peak efficiency of 95.1% is achieved at 48V nominal input voltage with 190W/inch3 power density.

[1]  Fred C. Lee,et al.  High-efficiency high-power-density 48/1V sigma converter voltage regulator module , 2017, 2017 IEEE Applied Power Electronics Conference and Exposition (APEC).

[2]  Zhijian Fang,et al.  Optimal Design Methodology for LLC Resonant Converter in Battery Charging Applications Based on Time-Weighted Average Efficiency , 2015, IEEE Transactions on Power Electronics.

[4]  Khurram K. Afridi,et al.  Multitrack Power Conversion Architecture , 2017, IEEE Transactions on Power Electronics.

[5]  Fred C. Lee,et al.  LLC resonant converter with matrix transformer , 2014, 2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014.

[6]  F. Lee,et al.  Optimal Design of Planar Magnetic Components for a Two-Stage GaN-Based DC–DC Converter , 2019, IEEE Transactions on Power Electronics.

[7]  F.C. Lee,et al.  A family of high power density unregulated bus converters , 2005, IEEE Transactions on Power Electronics.

[8]  Martin Ordonez,et al.  LLC Converters With Planar Transformers: Issues and Mitigation , 2017, IEEE Transactions on Power Electronics.

[9]  Michael A. E. Andersen,et al.  Overview of Planar Magnetic Technology—Fundamental Properties , 2014, IEEE Transactions on Power Electronics.

[10]  Hui Chen,et al.  1-MHz LLC Resonant DC Transformer (DCX) With Regulating Capability , 2016, IEEE Transactions on Industrial Electronics.

[11]  Fred C. Lee,et al.  48-V Voltage Regulator Module With PCB Winding Matrix Transformer for Future Data Centers , 2017, IEEE Transactions on Industrial Electronics.

[12]  M. Andersen,et al.  High frequency LLC resonant converter with magnetic shunt integrated planar transformer , 2019, 2018 IEEE Applied Power Electronics Conference and Exposition (APEC).

[13]  Peng Xu,et al.  Design of 48 V Voltage regulator modules with a novel integrated magnetics , 2002 .

[14]  Fred C. Lee,et al.  Two-Stage 48 V-12 V/6 V-1.8 V Voltage Regulator Module With Dynamic Bus Voltage Control for Light-Load Efficiency Improvement , 2017, IEEE Transactions on Power Electronics.

[15]  W. G. Hurley,et al.  Calculation of Leakage Inductance for High-Frequency Transformers , 2015, IEEE Transactions on Power Electronics.

[16]  T. M. Jahns,et al.  Evolving and Emerging Applications of Power Electronics in Systems , 2013, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[17]  Fred C. Lee,et al.  Startup and control of high efficiency 48/1V sigma converter , 2017, 2017 IEEE Energy Conversion Congress and Exposition (ECCE).

[18]  Dushan Boroyevich,et al.  Wide-input-voltage-range dual-output GaN-based isolated DC-DC converter for aerospace applications , 2017, 2017 IEEE Applied Power Electronics Conference and Exposition (APEC).

[19]  Dushan Boroyevich,et al.  Ultralow Input–Output Capacitance PCB-Embedded Dual-Output Gate-Drive Power Supply for 650 V GaN-Based Half-Bridges , 2019, IEEE Transactions on Power Electronics.

[20]  Weimin Zhang,et al.  Investigation of Gallium Nitride Devices in High-Frequency LLC Resonant Converters , 2017, IEEE Transactions on Power Electronics.

[21]  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.

[22]  F. Lee,et al.  LLC resonant converter for front end DC/DC conversion , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[23]  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..

[24]  G. Wang,et al.  High Efficiency High Step-up Isolated DC-DC Converter for Photovoltaic Applications , 2019, 2019 IEEE Applied Power Electronics Conference and Exposition (APEC).

[25]  Dong Cao,et al.  An Isolated Composite Resonant Multilevel Converter with Partial Power Voltage Regulation for Telecom Application , 2018, 2018 IEEE Energy Conversion Congress and Exposition (ECCE).

[26]  F.C. Lee,et al.  High efficiency quasi-parallel Voltage Regulators , 2008, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.