What frequency did toyota use with the boost/buck converter? I was planning on adding an extra IGBT along with an inductor. I've wound my own before, but it was extremely annoying as it was a toroid, and I had no special equipment. I'd like to figure it out with a copper sheet and maybe some kapton tape or nomex. If the materials are under $400, it would be better than what's available commercially, as far as I know.
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