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news digest ♦ Power Electronics


cargo logistics support services to the ISS, beginning in 2012. Emcore’s solar panels will be assembled into deployable solar arrays by ATK’s Solar Arrays and Deployables business based in Goleta, California. The arrays will then be delivered to Orbital Sciences Corporation for integration into their Cygnus space vehicles.


“Coupling Emcore’s heritage of providing highly-efficient and reliable photovoltaics with ATK’s lightweight Ultraflex solar array design will result in a winning solution to produce the most advanced and reliable power to ensure Orbital’s Cygnus spacecraft is the long- term solution for the automated transport of goods to the International Space Station for many years to come,” said Dave Messner, General Manager of ATK’s Solar Arrays and Deployables business.


“Emcore values our long-standing business relationship with ATK and we are extremely honoured to receive this award,” said Christopher Larocca, Chief Operating Officer for Emcore. “Our proven manufacturing capability, technology leadership and high- reliability solar panels make Emcore the supplier of choice for demanding spacecraft power systems. We look forward to working with ATK to support Orbital and NASA for these important missions.”


Emcore is the world’s leading manufacturer of highly-efficient radiation-hard solar cells for space power applications. With a beginning- of-life conversion efficiency nearing 30% and the option for a patented, onboard monolithic bypass diode, Emcore’s industry leading multi- junction solar cells provide the highest available power to interplanetary spacecraft and earth orbiting satellites.


Power Electronics


How to make more efficient GaN transistors


Industry experts from EPC have published a new textbook which will enlighten power system design engineers on the theory and applications for gallium nitride transistors


The textbook, “GaN Transistors for Efficient Power Conversion” is being released by Efficient Power Conversion Corporation (EPC).


It is designed to provide power system design engineers basic technical and application- focused information on how to design more efficient power conversion systems using gallium nitride-based transistors.


“This book will help designers to understand the exceptional benefits of GaN technology and the intricacies of working with GaN transistors in power conversion systems. It will set the stage for a new era in power electronics applications that surpass everything that came before it,” commented Sam Davis, Editor-in-Chief, Power Electronics Technology magazine.


This practical guide provides guidance on the use of GaN transistors in widely used power electronics applications, ranging from buck converters to Power over Ethernet. Also included are discussions on fundamental power engineering subjects such as; performance characteristics of GaN transistors, layout considerations for GaN circuits, paralleling GaN transistors and driver IC requirements for GaN transistors. The final chapters address GaN device reliability, their exceptional radiation- resistant characteristics as well as their future in power electronics.


196 www.compoundsemiconductor.net January / February 2012


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