onsemi NCP1081 User Manual

NCP1081 Evaluation Board
User's Manual
PoE−PD Interface & Flyback Controller
Board
NCP1081REF12VC4GEVB
General
The NCP1081REF12VC4GEVB board allows easy
implementation and evaluation of a Power−over−Ethernet
powered equipment that is able to operate with an assigned
power level up to 25.5 W. The evaluation board is based on
PoE Powered Device controller NCP1081 (U2) with
integrated PoE PD interface controller and Flyback DC/DC
controller. The Flyback converter on this NCP1081 based
reference design generates a 12 V output voltage that is
isolated from the Ethernet link conductors.
Figure 1. Operational NCP1081REF12VC4GEVB
showing Basic Interconnections
The NCP1081REF12VC4GEVB board is designed as a
PoE splitter: having a PoE−enabled Ethernet port (labeled
"PoE IN") as input and generating an isolated 12 V supply
while passing through the data to another Ethernet port
(labeled "ETH OUT").
© Semiconductor Components Industries, LLC, 2022
November, 2022 − Rev. 0
EVAL BOARD USER'S MANUAL
Quick Start Guide
Step 1: Make sure the jumper is mounted on header P3
(labeled "MPS").
Step 2: Insert the Ethernet cable (cf. blue cable in the picture
on the left) coming from the PSE in the Ethernet connector
J2 labeled "PoE IN".
Step 3: Observe the status LEDs.
If the PSE powers up the system, the green POWER−ON
LED (labeled "PWRON") should be ON.
The status of the yellow LED (labeled "NCL") depends on
the PSE being used.
Step 4: Optionally connect the turret terminals that are
labeled "GND" and "12V" to a DC electronic load (cf. black
and red clips in the picture on the left). The DC electronic
load behind the NCP1081 EVB should be operational over
a 11 V to 13 V voltage range.
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www.onsemi.com
Publication Order Number:
EVBUM2849/D