Hybrid synchronous DC-DC buck power converter using Si and GaN transistors

Mohammad H. Hedayati, Pallavi Bharadwaj, Vinod John

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Usage of power converters in a vast variety of equipments from cellphones, laptops to automobiles, aeroplanes and satellites is increasing. Different synchronous buck converter configurations are considered in this work using Silicon (Si) devices and Gallium Nitride (GaN) devices of equal current ratings. The performance of these converters in terms of power losses and overall efficiency are compared. It is shown that the usage of GaN devices instead of Si devices reduces the power losses and improves the overall efficiency of the power converter. A hybrid synchronous buck converter topology consisting of one Si device and one GaN device is shown to have the lowest rated power loss for switches with similar ratings. The usage of GaN device as active switch and the Si device as synchronous diode is beneficial and has the highest efficiency among the possible converter configurations with an improvement in efficiency by 3-5% for rated conditions.
Original languageEnglish
Title of host publicationIEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Trivandrum, India
PublisherIEEE Press
Pages1-6
Number of pages6
ISBN (Electronic)9781467388887
ISBN (Print)9781467388894
DOIs
Publication statusPublished - Dec 2016
Event2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) - Trivandrum, India
Duration: 14 Dec 201617 Dec 2016
http://www.pedes2016.org

Conference

Conference2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)
CountryIndia
CityTrivandrum
Period14/12/1617/12/16
Internet address

Keywords

  • DC-DC power converters
  • synchronous operation
  • Si and GaN power FETs

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  • Cite this

    Hedayati, M. H., Bharadwaj, P., & John, V. (2016). Hybrid synchronous DC-DC buck power converter using Si and GaN transistors. In IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Trivandrum, India (pp. 1-6). IEEE Press. https://doi.org/10.1109/PEDES.2016.7914444