GaN Talk a blog dedicated to crushing silicon
Term: Power Conversion
2 post(s) found

How to Design a Highly Efficient, 2.5 kW, Universal Input Voltage Range, Power Factor Correction (PFC) 400 V Rectifier Using 200 V eGaN® FETs

How to Design a Highly Efficient, 2.5 kW, Universal Input Voltage Range, Power Factor Correction (PFC) 400 V Rectifier Using 200 V eGaN<sup>®</sup> FETs
Nov 03 2020

Acknowledgement - This application note and associated hardware was developed in collaboration with Semiconductor Power Electronics Center (SPEC) at University of Texas at Austin.

Motivation

The expansion of applications such as cloud computing, wearables, machine learning, autonomous driving, and IoT drive us towards an even more data-intensive world, increasing demands on data centers and power consumption [1, 2]. The importance of efficiency, power density, and cost of the AC to DC switching power supply is driving innovative solutions that eGaN FETs can solve to yield ultra-high efficiency power factor correction (PFC) front-end rectifier solutions that are the focus of this how-to-application note.

eGaN vs. Silicon

eGaN vs. Silicon
Jan 23 2020

This post was originally published by Dr. John Glaser & Dr. David Reusch on June 13, 2016 on the Power Systems Design web site.

Comparing Dead-time Losses for eGaN FETs and Silicon MOSFETs in Synchronous Rectifiers

There have been several comparisons of eGaN FETs with silicon MOSFETs in a variety of applications, including hard-switched, soft-switched, and high-frequency power conversion. These studies have shown that eGaN FETs have large efficiency and power density advantages over silicon MOSFETs. Here we’ll focus on the use of eGaN FETs in synchronous rectifier (SR) applications and the importance of dead-time management. We show that eGaN FETs can dramatically reduce loss due to dead-time in synchronous rectifiers above and beyond the benefits of low RDS(on)and charge.