Hybrid-type Bus-converter and High-density Integration for Data-center 48 V Power Supply Systems
A hybrid-type bus-converter and high-density integration for data-center 48 V power supply systems is proposed.By embedding autotransformer and LLC resonant converter into the switched capacitor converter,the step-down ratio of the switched capacitor converter is greatly increased,and the output current capability of the converter is significantly improved by using the matrix transformer structure.Based on the proposed hybrid-type bus-converter,a high-density integration method is further proposed,which comprehensively adopts magnetic integration and winding integration to improve the power density and efficiency of the converter.A one-eighth brick module with 40～60 V input,8:1 transformation ratio,100 A output current and 1 MHz switching frequency has been developed.The power density reaches 1.704 kW/in3 and the highest efficiency reaches 97.9％.
data centerbus converterswitched capacitorresonant convertermagnetic integration
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