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Research on the Buck-Boost converter based on the Smart Lm5116

A Buck-Boost converter with four fully synchronous transistors is proposed in this paper which achieves the output voltage lower or higher than the input voltage, in the un-isolated application. The control strategy and the working principle of circuit are discussed in this paper. Then, the implement of Buck-Boost converter with four fully synchronous transistors is expatiated, which is based on the LM5116. Furthermore, the design of key circuit parameter and the selection of power components are introduced. At last, the simulation and experimental results show the correction of the parameter designing.