The Ćuk Integrated Magnetics Converter With Current Ripple Cancellation: The Optimal Power Conversion Topology?
by Isaac Cohen, Huntington Station, N.Y., How2Power Today, Oct 15 2025
Focus:
It’s claimed that the Ćuk converter is superior to other topologies (operating at the same
frequency) because it offers zero (very low) current ripple at both input and output;
inductive energy storage replaced by capacitive energy storage, leading to lower cost and
smaller volume; dc current in the inductor, eliminating ac copper loss; and higher
efficiency. However, to the best of the author’s knowledge, no rigorous quantitative
comparison was ever done to validate the narrative and quantify the advantage in power
density and efficiency. In this presentation, a simple model is developed for simulation
of the Ćuk converter with integrated magnetics. This model is then used to compare the Ćuk
converter with an equivalent flyback converter. Some conclusions are drawn about the
claimed benefits of the Ćuk converter.
What you’ll learn:
- How to model Ćuk converter with integrated magnetics
- How to evaluate Ćuk converter performance versus the flyback
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