Modeling and analysis of Buck converter based on parallel current mode control strategy

Abstract

In this paper, a novel control method is introduced which refers to the concept of parallel current-mode control algorithm to obtain good dynamic performance for Buck converter undergoing a rapid load change and input voltage change. The duty cycle consisting of two terms: voltage term and current term is simple for implementation .Since there are only three additions and two multiplications. Besides, the small-signal model of parallel current-mode controlled Buck converter is presented for the design of compensator to satisfy steady and dynamic requirement of the system. The simulation not only verifies the validity of the compensation, but also demonstrates that the parallel current mode control has superior performance as compared with peak mode control.