Estimating performance of high output power density 400/400V isolated DC/DC converter with hybrid pair SJ-MOSFET and SiC-SBD for power supply of data center

In this paper, the performance of high output power density 400/400V isolated dc/dc converter for power supply in data center is investigated. The isolated dc/dc converter uses the hybrid pair of SJ-MOSFET and SiC-SBD power devices. A high accuracy of dc/dc converter analysis is carried out by considering the intrinsic and extrinsic loss parameter of power devices and circuit board. Based on this analysis, the efficiency and power density of isolated DC/DC converter is estimated for various high switching frequencies (100 kHz, 200 kHz and 300 kHz). From the result of the analysis operation of switching frequency by 200 kHz results in the highest output power density among the various high switching frequencies. The analysis estimates that the isolated dc/dc converter with efficiency around 97% and power density 10 W/cm 3 has strong possibility to be realized by the proposed design.