Title :
Accurate switching loss model and optimal design of a current source driver considering the current diversion problem
Author :
Fu, Jizhen ; Zhang, Zhiliang ; Dickson, Andrew ; Liu, Yan-Fei ; Sen, P.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, ON, Canada
Abstract :
A new analytical switching loss model for power MOSFETs driven by Current Source Drivers (CSDs) is presented in this paper. The gate current diversion problem, which commonly exists in CSDs, is analyzed. In addition, the proposed loss model considers the Miller Plateau. The optimal design of current source driver is achieved which minimizes the total power loss for the Buck converter. The experimental result verifies the theoretical analysis. Compared with previous work, the efficiency at 1 MHz with the optimal current source inductor is improved from 86.1% to 87.6% at 1 MHz switching frequency, with 12V input, 1.3V/20A output, and from 82.4% to 84.0% at 1MHz switching frequency, with 12V input, 1.3V/30A output.
Keywords :
constant current sources; driver circuits; power MOSFET; power convertors; semiconductor device models; Miller Plateau; analytical switching loss model; buck converter; current 20 A; current 30 A; current source driver; frequency 1 MHz; gate current diversion problem; optimal design; power MOSFET; voltage 1.3 V; voltage 12 V; Analytical models; Buck converters; Capacitors; Inductors; MOSFETs; Performance analysis; Switching converters; Switching frequency; Switching loss; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE
Conference_Location :
Palm Springs, CA
Print_ISBN :
978-1-4244-4782-4
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2010.5433591
