GaN provides a couple of benefits compared to Silicon: 1. It offers a lower on-resistance for the same breakdown voltage as a silicon device [1]. 2. It offers

GaN provides a couple of benefits compared to Silicon: 1. It offers a lower on-resistance for the same breakdown voltage as a silicon device [1]. 2. It offers a lower gate charge which allows you to turn it on and off at a much higher frequency than Silicon devices [2] (1) means you have lower losses in a power circuit with GaN vs Si (leading to more compact - smaller heat sinks - power supplies for example) (2) means power supplies can run at much higher frequencies. At higher frequencies, you can use smaller inductors and capacitors which means more compact circuits. A practical example of GaN in action is FinSix' Dart power supply [3] [1] Slide 5 of http://www.irf.com/product-info/ganpowir/gangeneral.pdf http://www.irf.com/product-info/ganpowir/gangeneral.pdf [2] http://m.eet.com/media/1179793/si-vs-gan-vs-sic-which-process-and-supplier-are-best-for-my-power-design-fig-3.jpg http://m.eet.com/media/1179793/si-vs-gan-vs-sic-which-proces... [3] http://finsix.com/dart/ http://finsix.com/dart/