| Title |
Efficiency Comparison of a Non-Inverting Buck-Boost Converter According to the Control Method |
| Authors |
Dong-Hyeon Hwang ; Woo-Cheol Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2017.31.1.079 |
| Keywords |
Non-inverting Buck-Boost Converter ; Critical Conduction Mode ; Efficiency Comparison |
| Abstract |
A non-inverting buck-boost converter is used to keep the output voltage constant if the range of variation of the input voltage is lower or higher than the desired output voltage. It has a wide input/output voltage range and the output voltage is not inverted unlike a typical buck-boost converter. The non-inverting buck-boost converter is classified into continuous current mode, discontinuous current mode, and critical conduction mode depending on the inductor current. The losses of the switching device depends on the current modes and the efficiency of converter is also different. Therefore, in this paper, the converter is controlled by the fixed frequency method and the critical conduction mode method to compare the converter efficiency according to the current modes at low power. In each control method, the losses of the switching element were calculated and compared. Simulation and experiment were performed to confirm the calculated results. |