Digital-analog hybrid controlled converter with interleaved PWM method

This paper presents a novel digital control method that improves both phase margin and jitter of a dc-to-dc switching converter. The proposed method has two controlled pulse, one is generated by digital control and the other by analog control. The resulted switching frequency is twice of analog control and digital control frequency, which results in smaller ripple currents in the converter. From the analysis and examination of frequency response and the transient response, it is clarified that the proposed control method greatly contributes to improve the stability and the dynamic performance compared to the conventional digital PID control.