Modeling and mitigation of dynamic load beat-frequency oscillation in multiphase voltage regulators with high-gain peak current control scheme

Author

Chiu, Chen-Hua ; Chen, Dan ; Chen, Ching-Jan ; Chang, Wei-Hsu

Author_Institution

Electr. Eng. Dept., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2010

fDate

21-25 Feb. 2010

Firstpage

1727

Lastpage

1731

Abstract

High-frequency dynamic load may cause phase current oscillation in multiphase interleaved voltage regulators. A model is presented in this paper to investigate this phenomenon in the recently reported high-gain peak current control (HGPCC) voltage regulators. Based on the analysis, it is concluded that HGPCC scheme suffers from beat-frequency oscillation problems, similarly to conventional peak current control scheme. A modified HGPCC scheme is then proposed and verified to mitigate this problem. A comparison of the three schemes will be made from the viewpoint of beat-frequency oscillation.

Keywords

electric current control; power convertors; voltage regulators; dynamic load beat-frequency oscillation; high-gain peak current control scheme; multiphase interleaved buck converter configuration; multiphase interleaved voltage regulators; phase current oscillation; Buck converters; Central Processing Unit; Circuits; Current control; Frequency; Inductors; Pulse width modulation; Regulators; Transfer functions; Voltage;

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.2010.5433465

Filename

5433465