Sayed Amir Sayed Fatahi, Morteza Esteki, H. Farzanehfard
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A Soft Switching Interleaved High Step-down Converter with Low Voltage Stress
This paper proposes a zero-voltage transition (ZVT) PWM high step-down converter. The proposed converter consists of a high step-down interleaved buck converter (IBC) and an auxiliary circuit with only one switch. The auxiliary circuit provides zero voltage switching (ZVS) condition for the IBC switches, while zero current switching condition is achieved for the auxiliary switch and diodes. Due to utilizing a high step-down IBC, the voltage gain of the converter is much less than the conventional IBC. The proposed converter is analyzed, and its operating principles and design procedure are presented. In order to verify the analysis, the simulation results of a 120W prototype converter operating at 100kHz are reported.
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