A fast response digitally controlled full bridge converter

This paper presents a fast response digitally controlled full bridge converter in parallel operation. The digital controlled circuit has some problem. One of the main problems is the delay time. The delay time includes the conversion time of A-D converter and processing time of digital controller. It exerts a bad influence on the dynamic characteristic. In the proposed method, the sample timing for P control is contrived, thus the delay time for P control is minimized. The proposed fast P control method is applied to the full bridge converters in parallel operation. It is confirmed that the proposed method has superior transient response compared to the conventional method. The proposed digitally controlled parallel full bridge converter is suitable to the power converter for automotive.