STEVAL-TSP001V1: POE, 10W, 12V & 3.3V @ 650mA


This application note describes the demonstration board for the evaluation of a Power over Ethernet (PoE) system used to transmit electrical power, along with data, to remote devices over a standard twisted-pair cable in an Ethernet network.

A complete power solution for Ethernet-connected powered devices is presented. The power supply fully complies with IEEE 802.3-2005 PoE specifications and delivers the rated output from any compliant source.

Example outputs of 3.3 V and 12 V are given in this document, but other requirements can easily be met by implementing small changes.


Manufacturer STMicroelectronics
Category Power Management
Sub-Category POE - Power Over Ethernet
Eval Board -
Topology Step Down
Outputs and Type 2 Isolated
Voltage Out 12 V, 3.3 V
Current Out 650mA (x2)
Voltage In 44 ~ 57 V
Efficiency @ Conditions >76%, 48 Vin, 12 & 3.3 @ 325 ~ 650 mA Out
Internal Switch No
Features Over Current Protection
Under Voltage Protection, Brown-Out
Switching Frequency 100 kHz
Component Count + Extras 53 + 4
Design Author STMicroelectronics
Application / Target Market PoE, Power Over Ethernet
Main I.C. Base Part L6565

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