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
■ Low profile, small size: 5" x 1.5" x 0.65" (0.5"
except RJ-45 Ethernet connectors)
■ Complies with all IEEE 802.3-2005 (IEEE
802.3af) PoE specifications
■ Respects source limitations
■ Does not pollute power source
■ 1500 V isolated outputs eliminate ground loops
■ Economical output power (total power at output
approximately 10 W)
■ Useful output voltages
– 12 V @0.65 A output (7.8 W, loose
tolerance)
– 3.3 V @0.65 A output (2.145 W, tight
tolerance)
■ Increased cost-effectiveness due to SMT
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
