Selecting the Right Power Semiconductor for Multi-MHz Power Converters-Video

In particular, the power semiconductors – which often drive thermal constraints – dissipated much more power than expected, rendering designs based on simulated values unusable. In soft-switched converters, which dominate at MHz frequencies, the semiconductor’s output capacitor is resonantly charged and discharged once per switching cycle. Recently, multiple papers have found significant losses from this process in silicon and wide-bandgap devices, explaining the unexpected power dissipation. With these losses known, the MHz-frequency design space can be reopened – if designers are careful about semiconductor selection. In this webinar, we will give the audience the tools to select the right device across material (GaN, SiC, or Si), device technology (super junction or trench), size (lower RDS, ON is not always better), and, in some cases, manufacturer. Further, we showcase how this selection drives thermal design, input voltage selection, and novel circuit topologies in a variety of high-performance demonstrations from 6.78 MHz all the way to 40.68 MHz.