EVALPM8803-FWD Datasheet, PDF (1/5 Pages) STMicroelectronics – Data pass-through for the ethernet data

EVALPM8803-FWD
EVALPM8803-FWD: IEEE802.3at compliant demonstration kit
with synchronous active clamp forward PoE converter
Features
■ EEE 802.3at compliant
■ Support for Gigabit Ethernet
■ Data pass-through for the ethernet data
■ Works with power supplied from Ethernet LAN
cables or from local auxiliary sources
■ Successful IEEE802.3at Layer1 classification
indicator
■ Single output 3.3 V/5 V
■ 90+% converter efficiency
■ Board size 10x13 cm
Description
The EVALPM8803-FWD is a demonstration board
implementing an IEEE802.3at compatible
interface together with a self driven synchronous
active clamp forward converter based on
PM8803.
The board is designed to work up to 30 W, and
with minimal changes the output voltage can be
selected either 5 V or 3.3 V. For sake of flexibility,
alternative footprint have been foreseen tor the
main component (MOS, transformer, etc.).
It is possible to connect auxiliary sources to one
of the 2 jacks in the EVALPM8803-FWD like in
real application design. In one case thanks to the
PM8803 feature, prevalence of the auxiliary
source can be guaranteed.
Three LEDs give indication of:
– the converter is running
– an external auxiliary source is connected to
the board
– a type 2 PSE is connected to the board.
EVALPM8803-FWD
June 2011
Doc ID 018599 Rev 2
1/5
www.st.com
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