CUI Inc. A SEPIC Fed Buck Converter

A new patented topology – the SEPIC fed buck converter – addresses two critical issues confronting the power electronics field today: efficiency and transient response. A buck converter is integrated into a SEPIC to receive energy from the SEPIC inductors and the outputs of both deliver energy to the load in parallel. When the controlling switch – shared by both converters – is ON, the buck portion delivers energy to the load while the SEPIC portion stores energy in the magnetic element and feeds the buck portion.

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