Ćuk converter
type of buck-boost converter with low ripple current
The Ćuk converter (Serbo-Croatian: [tɕûːk], English: ) is a type of buck-boost converter with low ripple current. A Ćuk converter can be seen as a combination of boost converter and buck converter, having one switching device and a mutual capacitor, to couple the energy.
Similar to the buck-boost converter with inverting topology, the output voltage of non-isolated Ćuk converter is typically inverted, with lower or higher values with respect to the input voltage. While DC-to-DC converters usually use the inductor as a main energy-storage component, the Ćuk converter instead uses the capacitor as the main energy-storage component. It is named after Slobodan Ćuk of the California Institute of Technology, who first presented the design.
Non-isolated Ćuk converter
There are variations on the basic Ćuk converter. For example, the coils may share a single magnetic core, which drops the output ripple, and adds efficiency. Because the power transfer flows continuously via the capacitor, this type of switcher has minimized EMI radiation. The Ćuk converter allows energy to flow bidirectionally by using a diode and a switch.
Operating principle
A non-isolated Ćuk converter comprises two inductors, two capacitors, a switch (usually a transistor), and a diode.
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