Location: Albuquerque, NM
Event Duration: Monday, March 25 — Thursday, March 28
GaN Power Electronic Session
Presented By: Wolfspeed, A Cree Company,
and Jeremy Fisher, Scott Sheppard, Saptharishi Sriram, Jennifer Gao.
Location: Albequerque, New Mexico
Date: Wednesday, March 27th from 3:30am — 5:10pm
Please join us for a presentation reporting the results of two fully integrated buck converters using Wolfspeed’s GaN on SiC components at a high switching frequency.
Highly efficient and fast power switches have been demonstrated with GaN HEMT on SiC. With such devices, it's possible to increase the switching rate of a half bridge synchronous buck converter and therefore decrease the value of the inductance of the output filter. However, a higher switching frequency increases the sensitivity of the gate driver connection to the switches. This paper reports two fully integrated buck converters with their gate drivers, using Wolfspeed enhanced/depleted mode GaN on SiC process. With a switching frequency of 10MHz, output powers from 10W to 30W have been delivered with a switcher efficiency ranging from 90% to 95%, and an overall efficiency of 87% to 95%, under an input voltage of 28V. The size of the circuits is less than 5.2mm2.