A family of integrated dual-output DC-DC converters: Synthesis methodology and performance analysis

A family of integrated dual-output DC-DC converters with three switches is proposed in this paper. In comparison with two separate DC-DC converters, lower cost and volume can be achieved since the number of switches is reduced. First of all, the topology synthesis methodology is introduced and based on which, several integrated dual-output DC-DC converters are derived. Then, an integrated buck-flyback converter which simultaneously obtains two independent isolated and non-isolated outputs is analyzed as an example. Apart from the reduced switching components, zero-voltage-switching (ZVS) operation is retained for one switch. Thus, the switching losses are reduced. Furthermore, the effectiveness of the proposed converter is validated by experimental results. Finally, the integrated concept is extended to achieve multiple outputs.