In this study, a novel high step-up DC-DC converter was successfully integrated using\ncoupled inductor and switched capacitor techniques. High step-up DC-DC gain was achieved using\na coupled inductor when capacitors charged and discharged energy, respectively. In addition, energy\nwas recovered from the leakage inductance of the coupled inductor by using a passive clamp circuit.\nTherefore, the voltage stress of the main power switch was almost reduced to 1/7 Vo (output voltage).\nMoreover, the coupled inductor alleviated the reverse-recovery problem of the diode. The proposed\ncircuit efficiency can be further improved and high voltage gain can be achieved. The operation\nprinciple and steady-state analysis of the proposed converter were discussed. Finally, a hardware\nprototype circuit with input voltage of 24 V, output voltage of up to 400 V, and maximum power of\n150W was constructed in a laboratory; the maximum efficiency was almost 96.2%.
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