Digital power controller with non-linear variable switching frequency

Author

Qahouq, Jaber A Abu

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Alabama, Tuscaloosa, AL, USA

fYear

2010

fDate

21-25 Feb. 2010

Firstpage

120

Lastpage

123

Abstract

Digital controller for a power converter with non-linear variable switching frequency is presented in this paper. Regression analysis is used to obtain approximated function of the non-linear variable switching needed to yield output voltage ripple in DCM that is close to the CCM output voltage ripple. The need to sense and sample the peak inductor current and the input voltage is avoided in the presented digital controller. The approximated function has the load current as an input and the nonlinear switching frequency as its output and it is used by the digital controller to set the switching frequency during DCM operation of the power converter.

Keywords

digital control; power control; power convertors; regression analysis; CCM; DCM; continuous conduction mode; digital power controller; discontinuous conduction mode; low output voltage ripple; nonlinear switching frequency; nonlinear variable switching frequency; power converter; regression analysis; yield output voltage ripple; Buck converters; Digital control; Electric variables control; FETs; Inductors; Nonlinear equations; Pulse width modulation; Regression analysis; Switching frequency; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE

Conference_Location

Palm Springs, CA

ISSN

1048-2334

Print_ISBN

978-1-4244-4782-4

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2010.5433684

Filename

5433684