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Boost (SI-B) converter is proposed with reduced voltage stress across active switches to achieve higher output volt age. The SI-B converter configuration is transformer-less and derived by replacing the diode of the classical switched inductor structure with an active switch. As a result, com pared to the existing transformer-less high step-up converter or switched inductor boost converter, certain embodiments have the merit that the switch voltage stress across the active switch is less than the output voltage.