The paper reports on D-mode HEMT device performance when configured in cascode mode, including basic parameters of the device and its integration into a PQFN package. A detailed discussion demonstrates the 500V 3.3A switching characteristics of the cascode and proves excellent switching performance with measured voltage slew rates as large as 70 V/ns.
The GaN D-mode HEMT device developed in the work covered by the paper was fabricated using a conventional RF GaN process flow on 3” 4H SI-SiC starting substrate. The SiC substrate should allow for excellent thermal performance and high voltage operation of the switching device due to the semi-insulating nature of the SiC substrate.
Enabling superior switching efficiencies over current silicon based solutions; GaN Systems has developed proprietary gallium nitride high power transistors for clean technology power conversion applications. These devices offer substantial benefits to switching power supply designs, inverters, hybrid and electric vehicles, battery management and power factor correction.