Part 2 has another 160 pages, and can be viewed separately.
It has 69 pages of lecture notes continued from previous PDF, plus a new chapter named "Principles of Switching DC-DC Converter Analysis."
Part 3 PDF can be viewed separately and contains another 160 pages.
(楼主挺厚道的. ...)
It contains 88 pages continued from previous chapter "rinciples of Switching DC-DC Converter Analysis", and followed by a new chapter named "Switching DC-DC Conveters."