雜談GaN技術

計算和電信市場的快速擴展對中間總線轉換器提出了越來越緊湊、高效和高功率密度的解決方案需求。LLC諧振轉換器是一個提供高功率密度和高效率解決方案的優秀候選者。eGaN® FET 以其超低導通電阻和寄生電容，顯著減少了LLC諧振轉換器的損耗，而這在使用矽MOSFET時是具有挑戰性的。展示了一個採用eGaN FET如EPC2053 和EPC2024 的48 V到12 V、900 W、1 MHz LLC DC到DC變壓器（DCX）轉換器，其峰值效率達到98.4%，功率密度超過1500 W/in3。

Gallium nitride (GaN) is a better semiconductor than silicon. There are many crystals that are better than silicon, but the problem has always been that they are far too expensive to be used in every application where silicon is used. But, GaN can be grown as an inexpensive thin layer on top of a standard silicon wafer enabling devices that are faster, smaller, more efficient, and less costly than their aging silicon counterparts.

In January of 2016 I made several predictions for the then-nascent year. Predictions were made for new markets such as wireless charging, augmented reality, autonomous vehicles, and advances in medical diagnostics and internet access. Progress in these markets was made on all fronts, sometimes faster and sometimes slower than anticipated. So here we are about to start a new year and, perhaps foolishly I am ready once again to predict the future.

In past postings , we looked at the applications that have emerged because of new capabilities available with #GaN technology. We also discussed the transformational nature of some of these applications in areas like medicine, telecommunications,human-machine interfaces, and the delivery of electrical power itself (wireless power transfer). GaN technology is entering an era similar to the 80’s and 90’s when the utility of technological improvement was apparent across broad commercial markets. Consequentially, consumers will be willing to pay a premium for the life-style improvements enabled by these improvements thereby accelerating growth of GaN applications for the foreseeable future.

The demand by our society for information is growing at an unprecedented rate. With emerging technologies, such as cloud computing and the internet of things (IoT), this trend for more and faster access to information is showing no signs of slowing. What makes the transfer of information at high rates of speed possible are racks and racks of servers, mostly located in centralized data centers.