Dual-GCT design criteria and voltage scaling

Global optimization has been performed to derive optimal Dual-GCT structures for 3.3 kV, 5 kV, and 6.5 kV class devices by using numerical simulation results. A treatment of all relevant physical concepts for both standard- and Dual-GCTs are taken into account in the optimization process, providing an insight into the effect of design parameters such as minority carrier lifetime, buffer region design, and device geometry. The results indicate that within the scope of a Dual Active Bridge power converter application, the Dual-GCT can provide more than 54 % improvement in the current density when compared to equivalent conventional devices for each of the device ratings examined, which verifies the scalability of the Dual-GCT concept.