NCP1081SPCGEVB(#2): 1.25 ~ 50V @ 2.5A, 36 ~ 57V in


The NCP1081SPCGEVB implements a PoE power splitter that converts the voltage on the Ethernet cable to a lower voltage. The board is equipped with 2 RJ45 connectors, one connector serves as the data and power input and the other connector is the data output. Ethernet data is untouched by the board and simply forwarded.

Close to the switching MOSFET voltages on the board may exceed 200 V (@ 250 kHz). Temperature of board and its components may exceed 85°C during normal operation. The Evaluation board was designed to operate correctly under these conditions.

The input voltage should never exceed 57 V nor should the evaluation board be loaded with loads higher than the specified 30 W. Exceeding the specified input and output values could permanently damage the board.


Manufacturer ON Semiconductor
Category Power Management
Sub-Category POE - Power Over Ethernet
Eval Board Part Number NCP1081SPCGEVBOS-ND
Eval Board Supplier ON Semiconductor
Eval Board Normally In Stock
Compliance IEEE 802.3at Type 2
Outputs and Type 1 Isolated
Voltage Out 12 V
Current Out 2.5 A
Voltage In 36 ~ 57 V
Efficiency @ Conditions >88%, 48V in, 12V @ 2.5 A
Internal Switch No
Features Current Limit (Adj. or Fixed)
Shutdown, Enable, Standby
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 250 kHz
Component Count + Extras 75 + 2
Design Author ON Semiconductor
Application / Target Market
Main I.C. Base Part NCP1081
Date Created By Author 2011-12
Date Added To Library 2016-05

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