Average Current-Mode Control for a Quadratic Buck Converter

Author

Carbajal-Gutiérrez, E.E. ; Morales-Saldana, J.A. ; Leyva-Ramos, J.

Author_Institution

Fac. de Ingenieria, Univ. Autonoma de San Luis Potosi

fYear

2005

fDate

16-16 June 2005

Firstpage

2146

Lastpage

2150

Abstract

In this paper, a methodology for controller design of a quadratic buck converter is given using average current-mode control. This scheme employs an inner loop that uses the average current of the first inductor and an outer loop that senses the output voltage for feedback purposes. Thus, a procedure is developed for the proper selection of: (a) the current gain for the inner loop, and (b) PI-controller for the outer loop. The design-oriented analytic results allow the designer to easily pinpoint the control circuit parameters that optimize the converter´s performance. At the end, experimental results are given for a 28 W current-programmed regulator

Keywords

PI control; control system synthesis; electric current control; power convertors; 28 W; PI-controller; control circuit parameters; current-mode control; current-programmed regulator; quadratic buck converter controller design; Buck converters; Circuits; Design methodology; Design optimization; Feedback loop; Inductors; Output feedback; Performance analysis; Regulators; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th

Conference_Location

Recife

Print_ISBN

0-7803-9033-4

Type

conf

DOI

10.1109/PESC.2005.1581929

Filename

1581929