Title

New Physical Insights On Power Mosfet Switching Losses

Keywords

Power converters; Power MOSFET; Switching power loss

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. © 2009 IEEE.

Publication Date

3-10-2009

Publication Title

IEEE Transactions on Power Electronics

Volume

24

Issue

2

Number of Pages

525-531

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TPEL.2008.2006567

Socpus ID

61549120337 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/61549120337

This document is currently not available here.

Share

COinS