<p>This paper presents a hybrid Y-quasi-Z source soft-switching high-gain DC-DC converter. By combining the advantages of quasi-Z-source and Y-source networks and further utilizing switched-capacitor technology, the proposed converter has a high boost capability. To reduce losses and improve converter efficiency, a diode in the quasi-Z source network is replaced with a switch, and synchronous rectification is applied to make the power devices in the proposed converter operate at zero voltage switching (ZVS) and zero current switching (ZCS) conditions. In addition, the proposed converter has the advantages of continuous input current and common ground for the input and output voltage. The working states and steady states are analyzed in detail. Loss calculations and distribution are quantitatively studied. The small-signal analysis has been presented. The proposed converter implementation soft-switching design requirements are derived in detail. Comparisons between topologies have been provided. Finally, the feasibility of the proposed converter was verified by a 160W prototype made in the laboratory.</p>