NDLI: MOSFET Switching Loss Model and Optimal Design of a Current Source Driver Considering the Current Diversion Problem

Content Provider	IEEE Xplore Digital Library
Author	Jizhen Fu Zhiliang Zhang Yan-Fei Liu Sen, P.C.
Copyright Year	1986
Abstract	A new analytical switching loss model for power MOSFETs driven by the current source driver (CSD) is presented in this paper. The gate current diversion problem, which commonly exists in existing CSDs, is analyzed mathematically. In addition, a new accurate switching loss model considering every switching interval piecewisely is proposed. Based on the proposed loss model, the optimal design of the CSD inductor is achieved to minimize the total power loss for the buck converter. The experimental result verifies the proposed switching loss model and optimal design. The measured loss matches the calculated loss very well; the error between the calculated loss and measured one is less than 10% from 5 A load to 30 A load with 12 V input and 1.3 V output. As compared with the previous study, the efficiency with the optimal CSD inductor is improved from 86.1% to 87.6% at 12 V input and 1.3 V/20 A output and from 82.4% to 84.0% at 12 V input and 1.3 V/30 A output at 1 MHz switching frequency. As compared with the commercial driver-MOSFETs from Renesas and International Rectifier, the buck converter with the optimal CSD still shows better performance.
Sponsorship	IEEE Power Electronics Society
Starting Page	998
Ending Page	1012
Page Count	15
File Size	1449785
File Format	PDF
ISSN	08858993
Volume Number	27
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switching loss Power MOSFET Logic gates Driver circuits Inductance Inductors voltage regulator (VR) Buck converter common source inductor current source driver (CSD) current diversion problem driver-MOSFET (DrMos) loss model optimal design power MOSFET
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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