A Control Strategy for Multi-Phase Buck Converters under Dynamical Selection of Active Phases

Abstract—In multi-phase buck converters the effi-ciency at light load can be substantially improved by deactivating some phases and reducing the switching losses associated. This paper analyzes the perturba-tions introduced by the phase-enable logic and proposes a correction term to mitigate the effect of the transi-tions on the output voltage. The strategy proposed is verified using simulations. I