Dual output with a single TL497a

[ZILtoid1991]

Schematic:

Instead of either making an isolated converter or two different converters, I came up with the idea of combining the buck-boost with a flyback converter. Would this work in practice?

[nickm]

Yeah that's a flybuck.  I didn't check if you had the dots correct, but it doesn't look like you hooked up the controller correctly though. 

[Richard Crowley]

Essentially the same circuit I found at TI.  I am experimenting with making a board that will take a typical 18-20V laptop "line-lump" power input, and generate + and - 15VDC for audio circuits.



http://www.ti.com/lit/an/slva369a/slva369a.pdf



http://www.ti.com/product/tps54340

http://www.ti.com/tool/PMP10090.2