A cascode approach where an LV Si MOSFET is essentially placed in series and creates the gate drive.A notable exception to the relatively low Vt for e-mode devices is the offering from Cambridge GaN Devices which offers>2V e-mode devices through some innovative design approaches. Examples of this approach would be devices offered by GaN Systems, GaN Power International, Innoscience to name just a few. e-mode: here the device could be formed with a p-GaN Schottky gate and result in a Vt of around 1.7V. The two most widely used approaches to GaN HEMTs for power applications are: The main features of several of the most accessible HEMTs will be discussed in this article, along with some of the tradeoffs associated with them. In various power conversion and power delivery applications, GaN HEMTs are leading the way in developing new possibilities and displacing Si-based systems.
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