At the end of this concluding chapter, we will carry out a sample design of a flyback regulator. But this book will not teach switching-power conversion from scratch. Because that is a complex area in itself, deserving of an entire book. We recommend that the relatively inexperienced reader refer to Switching Power Supplies A-Z.
In the initial part of this chapter we will discuss another very important PD systems issue: that of auxiliary power sources (e.g., wall-adapters) in PDs.
Many PoE applications employ auxiliary power sources, typically an AC “wall wart” (or solar cell) connected to the Powered Device (PD). Integrating auxiliary power can be a very challenging design task and the PoE designer must understand the various methods ...