Analysis of the tuned-average current-mode control of the constant frequency DC/DC converters

This paper presents an original method for inductor current control of constant-frequency DC/DC converters operating in continuous current mode. It includes information about voltage in the current loop. Its main features are stable operation over full range of duty cycle variations without subharmonic oscillations, fast dynamic response and inherent short-circuit protection. Therefore, no artificial means of stabilization should be provided as with peak current-mode control. Excellent dynamic response is achieved compared to other existing control methods. Implementation is simple and advantageous. Since the converter is of a discrete nature, its sampled-data model is analyzed and small-signal analysis is performed. An experimental model of a buck converter is tested, and the results of it´s transient response are obtained. Boost and buck-boost converters are analyzed and the results are briefly reviewed.