NDLI: New Physical Insights on Power MOSFET Switching Losses

Content Provider	IEEE Xplore Digital Library
Author	Yali Xiong Shan Sun Hongwei Jia Shea, P. Shen, Z.J.
Copyright Year	1986
Abstract	Realistic estimation of power MOSFET switching losses is critical for predicting the maximum junction temperature and efficiency of power electronics circuits. The purpose of this paper is to investigate the internal physics of MOSFET switching processes using a physically based semiconductor device modeling approach, and subsequently examine the commonly used power loss calculation method in light of the new physical insights. The widely accepted output capacitance loss term is found to be redundant and erroneous based on the new modeling and measurement results. In addition, the existing method of approximating switching times with the power MOSFET gate charge parameters grossly overestimates the switching power loss. This paper recommends a new MOSFET gate charge parameter specification and an effective switching time estimation method to compensate for the power loss calculation error introduced by the two-slope voltage transition waveform of the power MOSFET.
Sponsorship	IEEE Power Electronics Society
Starting Page	525
Ending Page	531
Page Count	7
File Size	534756
File Format	PDF
ISSN	08858993
Volume Number	24
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MOSFET circuits Power MOSFET Switching loss Power semiconductor switches Temperature Power electronics Physics Semiconductor device modeling Capacitance measurement Loss measurement switching power loss Power converters power MOSFET
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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