Predictive digital current mode controlled DC-DC converter with duty calibration technique

Abstract

Predictive digital current mode control for DC-DC converter is implemented in this paper. Actually, system delay resulted from ADC conversion and compensator calculation would cause the current-loop response to become slower and thus have worse transient performance. In order to improve the current-loop response to reach one-cycle delay, this paper proposes a duty calibration technique for predictive digital average current mode controlled buck converter. Experimental results can prove that the technique for one-cycle delay is feasible and improve transient performance.