GaN-Based Multiple Output Flyback Converter With Independently Controlled Outputs

Arnab Sarkar; Bhanu Teja Vankayalapati; Sandeep Anand

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GaN-Based Multiple Output Flyback Converter With Independently Controlled Outputs

机译：GaN-Based Multiple Output Flyback Converter With Independently Controlled Outputs

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摘要

Several techniques are proposed in the literature to improve the cross-regulation performance of a multiple output flyback converter (MOFC). However, some drawbacks exist, first, inability to completely eliminate cross-regulation, second, reduction of power density due to a high number of additional components, third, increased losses. To overcome these challenges, this article presents a scheme to independently control the outputs of an MOFC, thereby achieving an excellent cross-regulation performance over a wide range of loads, without any additional switching or magnetic component. The unique gate dependent reverse conduction characteristics of gallium nitride (GaN) high electron mobility transistor is utilized to control the flow of current to each of the output capacitors. The operational principle and the steady-state analysis are provided in detail. Moreover, design considerations, such as the switching frequency, GaN gate bias, leakage inductances, and output capacitance, are discussed, focusing on their impacts on the key design goals, particularly the efficiency, power density, and output voltage ripple. Furthermore, SPICE simulations are used to demonstrate the improvement in cross-regulation over existing schemes. Finally, a 40 W dual output laboratory prototype is built to verify the analysis. The measured maximum cross-regulation is 0.2%, which validates the effectiveness of the scheme.

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来源
《IEEE Transactions on Industrial Electronics》 |2022年第3期|2565-2576|共12页
作者
Arnab Sarkar; Bhanu Teja Vankayalapati; Sandeep Anand;
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作者单位

Indian Institute of Technology;

The University of Texas at Dallas;

Indian Institute of Technology, Bombay;

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原文格式 PDF
正文语种英语
中图分类无线电电子学、电信技术;
关键词
Cross-regulation; gallium nitride (GaN); multiple output flyback converter (MOFC); synchronous rectification; Gallium nitride; Logic gates; HEMTs; Windings; Switches; Regulation; Power system measurements;

GaN-Based Multiple Output Flyback Converter With Independently Controlled Outputs

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