You need to carefully read through the datasheets for devices such as
http://www.intersil.com/content/dam/Intersil/documents/an96/an9642.pdf
http://cache.freescale.com/files/analog/doc/fact_sheet/MC33395FS.pdf
And when you understand what all of these gadgets do, you will have a better understanding of the process which you want to achieve, and how to drive them.