Unitrode is a company that TI bought many years ago. They were one of the best power supply design companies in the world and TI has taken over a lot of that power supply chip prowess.
This is definitely in the realm of “intermediate” to “advanced” material but I think it’s a great resource and I wanted to share it. Lots of PDFs available for offline (ha) reading.
It won’t replace actually being in the classroom with the instructors, but is a nice supplement, especially if looking for some more niche topics like Wireless Power Transfer
Check out all the seminar material here: http://www.smps.us/Unitrode.html