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Please use this identifier to cite or link to this item: http://hdl.handle.net/10651/19541

Title: An insight into the switching process of power MOSFETs: an improved analytical losses model
Author(s): Rodríguez González, Miguel
Rodríguez Alonso, Alberto
Fernández Miaja, Pablo
González Lamar, Diego
Sebastián Zúñiga, Francisco Javier
Issue date: 2010
Publisher version: http://dx.doi.org/10.1109/TPEL.2010.2040852
Citation: IEEE Transactions on Power Electronics, 25(6), p. 1626-1620 (2010); doi:10.1109/TPEL.2010.2040852
Format extent: p. 1626-1640
Abstract: The piecewise linear model has traditionally been used to calculate switching losses in switching mode power supplies due to its simplicity and good performance. However, the use of the latest low voltage power MOSFET generations and the continuously increasing range of switching frequencies have made it necessary to review this model to account for the parasitic inductances that it does not include. This paper presents a complete analytical switching loss model for power MOSFETs in low voltage switching converters that includes the most relevant parasitic elements. It clarifies the switching process, providing information about how these parasitics, especially the inductances, determine switching losses and hence the final converter efficiency. The analysis presented in this paper yields two different types of possible switching situations: capacitance-limited switching and inductance-limited switching. This paper shows that, while the piecewise linear model may be applied in the former, the proposed model is more accurate for the latter. Carefully-obtained experimental results, described in detail, support the analytical results presented
URI: http://hdl.handle.net/10651/19541
ISSN: 0885-8993
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