A smart control approach for digitally controlled multiple-output DC-DC converter

This paper presents a smart control approach for digitally controlled forward type multiple-output dc-dc converter. In this case, the central problem of design is how to decide the integral coefficient. Since the decision of integral coefficient depends on the static characteristics, the selected integral coefficient is not suitable to perform the superior dynamic characteristics. Then, it is important to set the suitable the integral coefficient for not only static characteristics but also dynamic characteristics. As a result, overshoot and the convergence time of the output voltage are improved 30% and 30%. The overshoot of reactor current is improved 11%. Moreover, to achieve the improvement of the dynamic characteristic, the number of bits of the calculation part of the digital control circuit set enlarged. As a result, the overshoot and the convergence time of the output voltage are improved 78% and 30%. The overshoot of reactor current is improved 17%.