A New Multiple-Frequency Small-Signal Model for High-Bandwidth Computer V-Core Regulator Applications
Journal
Ieee Transactions on Power Electronics
Journal Volume
31
Journal Issue
1
Pages
733-742
Date Issued
2016
Author(s)
Abstract
A new multifrequency small-signal control model for high-bandwidth dc buck regulator is proposed. The describing function approach is taken to model the duty-cycle modulator, incorporating the effects of not only the modulating frequency $f_{m}$ , the switching frequency $f_{s}$ , and the two sideband frequencies $f_{s}-f_{m}$ and $f_{s}+ f_{m}$ . This model is significantly more accurate than the conventional average model and the recently proposed two-frequency model for applications with high control bandwidth-to-switching frequency ratio and high input-to-output voltage step down ratio, such as the v-core voltage regulators. The model is verified by simulations and experiments.
SDGs
Type
journal article