A WBG Based 400/48V LLC Converter Operating at 500 KHz with 99 % Efficiency
For example, a complicated transformer structure is broken down into three simple transformer structures that can easily be implemented using a form of 4-layer PCB. Furthermore, these magnetic components are integrated into a compact structure that is easy to manufacture. By adding two additional shielding layers into the 4-layer PCB, a 20db reduction of common-mode noises is realized in the entire frequency spectrum of interest, from 150 KHz up to 30 MHz. A 3 kW 400/48V dc-dc converter is demonstrated with a peak efficiency of 99 % and a power density of 450 W/in3 (28 kW/L) as shown in Fig. 1.