Hi Jay R., you said, you need an IC of 800W!!!. I don't think that something like that exists, or at least I've never seen nothing like this before. In a previous post I suggested you a book, did you saw it?. For your design you should use an inductor, which maybe must be capable of handling a current of at least 8A, maybe more. Please, take a chance to see the ebook. I've sent you a link to it, ready for download. This ebook is very good, I've learned too much from it. Yosmany.