Modeling and mitigation of dynamic load beat-frequency oscillation in multiphase voltage regulators with high-gain peak current control scheme
Journal
Applied Power Electronics Conference and Exposition (APEC)
Pages
1727-1731
Date Issued
2010-02
Author(s)
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.
Type
conference paper