Data Brief

For further information contact your local STMicroelectronics sales office.

August 2008

Rev 1

1/4

4

STEVAL-TSP001V1

Power over Ethernet (PoE) demonstration

board based on the L6565

Features

except RJ-45 Ethernet connectors)

802.3af) PoE specifications

approximately 10 W)

– 12 V @0.65 A output (7.8 W, loose

tolerance)

– 3.3 V @0.65 A output (2.145 W, tight

tolerance)

construction (through-hole connectors for

ruggedness)

Description

This demonstration board is 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. The power supply fully complies with

IEEE 802.3-2005 PoE specifications and delivers

the rated output from any compliant source.

Outputs of 3.3 V and 12 V are used as examples

in this document, but other requirements can be

easily met with minor changes. The IEEE 802.3af

specification is intended to greatly simplify the

wiring to remote equipment by providing power

over the same medium that carries the signal to

and from the equipment. This concept is

particularly suitable for applications such as

security cameras, wireless access points, and

internet telephones (VoIP). The cable voltage was

selected so that existing 48 V telecom equipment

could be used to supply the power without

requiring DC-DC conversion.

STEVAL-TSP001V1

www.st.com