Design consideration of high performance digital control DC-DC converter based on frequency characteristics

The purpose of this paper is to reveal the effect of control gain in the proposed fast PD control method. A bode diagram is described using a loop transfer function. The variation tendency of frequency characteristics for different values of fast proportional gain and fast differential gain is discussed. Moreover, the frequency characteristics of proposed method are compared with the conventional PID control. Also, transient responses of proposed method and conventional PID control are compared and discussed in the simulation. As a result, the proposed method indicates a superior transient response to the conventional PID control.