A control algorithm to reduce steady state oscillation in digital V2 DC-DC converters

This paper describes a fully digital controlled switching mode DC-DC converter based on digital V² control algorithm. V² control in analog or digital realization can provide faster transient response compare to the conventional voltage or current-mode control. However, the reported digital V² control scheme suffers from steady state oscillation problem. In this paper, we proposed a new digital V² control algorithm to reduce the steady state oscillation by means of analysis in the time domain. With the new control algorithm, the load and line regulation is improved. Simulation results of the proposed digital V² DC-DC converter meet all the design specifications thereby verifying our theoretical analysis.