In Switching Power supplies and RF Circuits, the coils and transformers have many types of cores. Ferrites, Powder Iron, Air and others. These are much smaller and lighter for the same power that they deliver, in comparison to the 50/60 Hz Mains Transformers or chokes.
This section contains useful Application Notes and “How To Use” help to assist engineers better understand various applications of Power Inductors, Common Mode Chokes, Current Transformers, Power Transformers and Ferrites for EMI suppression etc.
Power Magnetics tools, RF Inductor tools, Common Mode Choke Finder, LC Filter Design tool, IC / Inductor Matching tools.
In general, ideal SMPS transformers need to transfer all energy instantaneously from one winding to another while storing no or little energy in the process.