Power Supply Design for Power-over-Ethernet Applications
The Internet is becoming as essential and ubiquitous a tool for communication and entertainment as are television and the telephone. An ever-growing variety of powered devices (PDs) such as wireless routers, web cameras, VoIP phones, and others are finding more and more applications in facilitating and extending the usefulness of the Internet.
POWER designer Expert tips, tricks, and techniques for powerful designs
All of these devices require a power source to run them and, although the obvious source of this power is the mains, this choice is unattractive because of the additional cables that need to be introduced. A far better solution is to use the Ethernet cable that transfers data to also carry power from the Ethernet hub to the PD, thus eliminating extra cables.
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