Title :
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
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;
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.2010.5433684
