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© Semiconductor Components Industries, LLC, 2012
October, 2012 − Rev. 0
1 Publication Order Number:
EVBUM2156/D
NCP1090GEVB,
NCP1094GEVB
Power-over-Ethernet PD
Interface Evaluation Board
User's Manual
Introduction
The NCP1090GEVB and NCP1094GEVB evaluation
boards are designed to showcase the features of the
NCP109x series of Power-over-Ethernet interfaces. The
boards are designed as splitter interfaces, taking a
PoE-enabled port as input and offering the power to a
separate connector, while passing through the data to
another Ethernet port. The schematics, gerber files and
BOM of these boards are available through our website
(www.onsemi.com
)
Basic Circuit Description
The evaluation boards consist of different sections that
will be described in detail in the next paragraphs. First, we
will discuss the input section, including selection of the
correct connectors, magnetics and the termination for a
Power-over-Ethernet enabled connection. In the next
section we will explain the operation of the NCP109x, the
detection and classification process, and how to configure
the NCP109x for the correct power class. Finally, we will
explain how to use the UVLO support (for NCP1091 and
NCP1093) or auxiliary support (for NCP1092 and
NCP1094).
Table 1. ELECTRICAL CHARACTERISTICS
NCP1090,
NCP1091,
NCP1092
NCP1093,
NCP1094
Input Voltage, PoE 37 V − 57 V
Input Current, PoE 500 mA 680 mA
Auxiliary Input Voltage 7.5 V − 65 V
Auxiliary Input Current 0 − 5 A
Figure 1. NCP1090GEVB Photo
Figure 2. NCP1094GEVB Photo
http://onsemi.com
EVAL BOARD USER’S MANUAL
