Venturing into MHz switching frequency promotes the integration of inductive DC-DC converter into mobile devices. Combining GaN power switch with low-loss ferrite core materials opens up new possibilities for high-frequency operations. In this work, we investigate the design of a single core inductor and single chip half-bridge switch for ZVS buck converter. Design guidelines are accompanied by preliminary performance assessment via simulations. To demonstrate the performance of our device, we fabricated and tested a 20 W prototype converting 6 - 12 V to 4 V at 2 MHz switching frequency. The prototype achieves η > 90 % at Pout > 15 W and power density of 9.26 W/m2 with < 5 mm thickness.
|Conference||2021 IEEE 12th Energy Conversion Congress and Exposition – Asia|
|Period||24/05/2021 → 27/05/2021|
|Series||Proceedings of the Energy Conversion Congress and Exposition - Asia, Ecce Asia 2021|
- High frequency
- High power density
- Single chip half-bridge