Abstract: In the hybrid renewable power system,multiple-input DC/DC converters（MICs） serve as the interface of several sources with a load,and provide the load with the energy simultaneously or individually,which can simplify the system configuration and reduce the overall cost.In the applications with isolated requirement,the available MICs usually have a complex configuration and numerous transformer windings.A family of asymmetrical double-input DC/DC converters（DICs） was proposed.Compared with the available isolated DICs,the proposed converters have the advantages of simple architecture and soft-switching realization.The derivation and the control strategy of the converters were illustrated,and the operation principles were analyzed.Finally,the theoretical analysis was validated by the experimental results from a 240 W prototype.