‘Cuk-buck 2’ dc-dc converter – more fine art from Slobodan’s pen


Cuk-buck 2 from YouTube

He sees the partly-resonant design as a competitor to hard-switched high ratio topologies – such as for 48V to 1V conversion, where on-time is so short that GaN switching transistors are being proposed.

His uses a tapped inductor, two mosfets and a diode to get the same ratio without extreme on-times, or nasty ratings for the components.

It is described in US Patent 7915874.

and also in this video where Cuk – describes the subtlety – sadly the video quality is not great. The image is taken from the video.


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