Depletion-Mode GaN (D-mode) has a low-voltage enhancement-mode N-channel MOS connected in series internally to achieve normally-off state. The switching is realized by controlling the series-connected N-channel MOS. In the industry, the cascaded (Cascode) structure is generally adopted, which is also known as the common-source common-gate type. The Cascode structure has a drive that is compatible with traditional N-channel MOS controllers. Compared with enhancement-mode GaN, there is no need to …