Output impedance of high performance current mode dc-dc buck converters, with applications to voltage-regulator module control combinations

Author

Mossoba, J.T. ; Krein, P.T.

Author_Institution

Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA

Volume

2

fYear

2004

fDate

2004

Firstpage

1315

Abstract

Voltage regulator modules (VRMs) comprising parallel interleaved buck converters can be controlled by current-mode methods to achieve low dynamic output impedance. A two-phase VRM is designed using both sensorless current mode (SCM) and peak current mode (PCM) control. SCM control for one phase provides a means of achieving low output impedance for the parallel converter system. PCM is used to control the other phase, without output voltage feedback, to enforce current sharing between the phases. In this configuration, SCM and PCM are exploited for their natural reference tracking capabilities: voltage and current, respectively.

Keywords

DC-DC power convertors; electric current control; voltage control; voltage regulators; current mode DC-DC buck converters; current-mode methods; low dynamic output impedance; output voltage feedback; parallel converter system; parallel interleaved buck converters; peak current mode control; sensorless current mode control; voltage-regulator module control; Application software; Buck converters; DC-DC power converters; Impedance; Output feedback; Phase change materials; Pulse width modulation; Regulators; Sensorless control; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2004. APEC '04. Nineteenth Annual IEEE

Print_ISBN

0-7803-8269-2

Type

conf

DOI

10.1109/APEC.2004.1295993

Filename

1295993