Improved auto-tuning for wide input voltage range digital control buck-boost DC-DC converter

This paper presents a new auto-tuning method for the wide input voltage range digital control buck-boost dc-dc converter. This buck-boost dc-dc converter is used with wide input voltage and a suitable proportional gain and bias value are changing against the input voltage of the converter. The gain and bias value are changed suitably in real time with digital control. As simulation results, it is revealed that both the static characteristics and dynamic characteristic can be improved. Especially, the steady-state error is improved from 653mV to 80mV and 296mV to 50mV, respectively.