The purpose of this application note is to demonstrate how existing PoE product range, together with the filter requirements, can offer a proprietary end-to-end solution for integrating power in an SPE application, reducing the cabling costs and eliminating the need for running power to hard-to-reach locations.

This application note provides information on how to protect Silvertel Power over Ethernet (POE) modules from over-voltages exceeding the 80V maximum rated surge input voltage.

This application note looks at Electromagnetic Interference (EMI) in Power over Ethernet (PoE) applications with regards to the Powered Device (PD).

New Product

The Silvertel Ag59FE module is a PoE PD controller module, which creates a complete PoE solution when paired with a DC/DC converter.

Silvertel schematic for IEEE802.3at PoE single-node daisy-chain.

Silvertel cost-optimized and fully featured IEEE802.3at single-in-line (SIL) PoE PD modules are pre-configured as Type 2 Class 4 PD devices.

Silvertel schematic for PoE and PoE+ with diode bridges.

Silvertel schematic for PoE and PoE+ without diode bridges.

Silvertel Ag9900LPB/Ag9900MTB PoE modules with miniature form factor design ensure seamless integration into the smallest space-constrained applications.

This application note is created as a guide to help understand the power available, and where power can be lost in a PoE application, in order to assist in adhering to the correct power limits when implementing a Silvertel module into an application such that power limits are not being exceeded.

Since the first release of IEEE802.3 specification in 2003, the relevance and importance of PoE as a technology has grown significantly, with more and more end applications and connected devices adopting PoE.

In this application note, to illustrate what happens under these conditions we have used an Ag5300 - which has a specified minimum load of 200mA (the principles explained below will be the same for our other modules).

Silvertel produces Power over Ethernet (PoE) and DC-DC converter modules in three form factors, Single in Line (SIL) through hole, Dual in Line (DIL) through hole, and Surface Mount (SMT). Each of these formats has its own range of benefits for any given project.

The Silvertel Ag59800-LPB product series are high-power and high-efficiency innovative Power over Ethernet (PoE++) PD module solutions.

Silvertel AG6810 high-power single or dual channel surface-mount power sourcing equipment (PSE) modules are suited for Power over Ethernet (PoE) applications.

Silvertel Ag97000-FL power over Ethernet PD module is pin-for-pin compatible with previous generations of the Ag9700, Ag9600 and Ag9400 product series.

The Silvertel Ag7300 high-power DC/DC boost converter generates high voltages while providing the isolation required for an IEEE802.3 compliant PSE application.

The Silvertel Ag7010 high-power DC/DC buck converter module features integrated PMBus commands through I²C for various PoL and DC/DC converter applications.

The Silvertel Ag5700-LPB series Power over Ethernet (PoE+) IEEE802.3at PD modules feature a low-profile surface mount and miniature footprint.

The Silvertel Ag59600-LPB product series are the latest world leading and innovative Power over Ethernet (PoE++) modules developed by Silvertel.