A simple switching loss model for buck voltage regulators with current source drive

Author

Eberle, Wilson ; Zhang, Zhiliang ; Liu, Yan-Fei ; Sen, Paresh

Author_Institution

Queen´´s Power Group, Queen´´s Univ., Kingston, ON

fYear

2008

fDate

15-19 June 2008

Firstpage

3780

Lastpage

3786

Abstract

A review of switching loss mechanisms for synchronous buck voltage regulators is presented. Following the review, a new simple analytical switching loss model is proposed for voltage regulators with current source drive. The model includes the impact of common source inductance and parasitic inductance on switching loss. It uses simple equations to calculate the rise and fall times and piecewise linear approximations of the MOSFET voltage and current waveforms to allow quick and accurate calculation of switching loss. Spice is used to demonstrate the accuracy of the model operating in a 1MHz synchronous buck voltage regulator at 12V input, 1.3V output. Experimental results are presented to demonstrate the accuracy of the proposed model.

Keywords

MOSFET; approximation theory; constant current sources; piecewise linear techniques; voltage regulators; MOSFET voltage; common source inductance; current source drive; current waveforms; frequency 1 MHz; parasitic inductance; piecewise linear approximations; switching loss mechanisms; switching loss model; synchronous buck voltage regulators; voltage 1.3 V; voltage 12 V; Analytical models; Driver circuits; Frequency estimation; Inductance; MOSFET circuits; Predictive models; Regulators; Switching converters; Switching loss; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2008. PESC 2008. IEEE

Conference_Location

Rhodes

ISSN

0275-9306

Print_ISBN

978-1-4244-1667-7

Electronic_ISBN

0275-9306

Type

conf

DOI

10.1109/PESC.2008.4592544

Filename

4592544