High performance digital control switching power supply

The purpose of this paper is to present a digital control method which suppresses the delay-time for the switching power supply. Generally, there is the delay-time caused by the A/D conversion time and the calculation time in the digital control. It causes the worsening of the transient response and brings the instability of the system. The proposed method can suppress the delay-time and improve the transient response. Results show that the proposed method can improve the transient response compared with the conventional PID control method and existing proposed method. Thus, the proposed method can contribute to the improvement of the transient response effectively.