Basic Characteristics of Digitally Controlled Boost Type Dc-dc Converter

This paper presents the basic characteristics of the digitally controlled boost type dc-dc converter. The static and dynamic characteristics of the dc-dc converter with the digital PID control are discussed. Especially, it is examined that the A-D conversion timing and anti-aliasing filter’s cut-off frequency affect the dynamic and static characteristics. As a result, when the anti-aliasing filter’s cut-off frequency is low, the range of unevenness of output voltage by the difference of A-D conversion timing is small. However, in the dynamic characteristics, the transient time is long and there is no difference against the A-D conversion timing.