www.pels.org Vol. 2, No. 2 June 2015 For your engineering success Features 24 Faster-Switching GaN 32 Challenges for Power Supplies in Medical Equipment Presenting a number of interesting measurement challenges Steve Sandler Ensuring patient and operator safety Dermot Flynn 38 Power electronics is increasingly cutting across traditional boundaries Don Tan IMAGE LICENSED BY INGRAM PUBLISHING Departments & Columns 4 6 9 10 12 54 59 60 61 64 48 APEC Guides Engineers to Latest Advances in Power Devices, Components, and Packaging High-voltage gallium nitride transistors and the new generation of digital controllers Ashok Bindra IMAGE LICENSED BY INGRAM PUBLISHING On the cover Meeting challenges head on! The advancement of galllium nitride (GaN) power switches brings with it a multitude of performance benefits while also providing many challenges. This issue of IEEE Power Electronics Magazine discusses some of these significant challenges using real-world measurements for both switching and linear power applications. Some proven and some potentially viable solutions and techniques are presented. Emerging System Applications and Technological Trends in Power Electronics 48 From the Editor President's Message Patent Reviews Letter to the Editor A Look Back Society News Chapter News Entrepreneur Viewpoint Event Calendar White Hot Digital Object Identifier 10.1109/MPEL.2015.2421135 June 2015 IEEE POWER ELECTRONICS MAGAZINE 1http://www.pels.org