Well, technically it's a coupled inductor, but it is a custom part.
The schematic seems to be showing it going to 100V. The split inductor allows a higher voltage than the MC34063 could handle on its switch/collector pin.the design page shows p/s to only 48v. i want 100v. what about a linear supply?
If you want to just use an off-the-shelf inductor, you'll want to use an external switch (FET/BJT transistor) that can handle the 100V. You can drive it with the MC34063 shown in the schematic, or use a different IC, e.g. UC3843.
Yep, but there are various grades of ferrite with different magnetic properties relating to inductance and suitable for different frequencies. Also, the cores are made with different air gaps, which drastically change the inductance per turn of the winding.the original pot core is ferrite.
i think its unnessiarily complicated. there should be an easier way. what about using the attached supply?