ON Semiconductor NCP1083QBCGEVB User Manual

 Semiconductor Components Industries, LLC, 2011

December, 2011 − Rev. 0

1 Publication Order Number:

EVBUM2006/D

NCP1083QBCGEVB

Compact, high efficiency,
30W Reference platform
with the NCP1083
Evaluation Board
User's Manual

Board Details

The NCP1083QBCGEVB implements a PoE module that
converts the power from the Ethernet cable to a lower
voltage. The board also supports getting its power from and
auxiliary input, in case PoE network is not available

Warnings

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.

Figure 1. Front Side of EVB

Figure 2. Back Side of EVB

Table 1. EVALUATION BOARD SPECIFICATIONS

Characteristic Min Typ Max Unit

Input Voltage, PoE Input 36 − 57 V

Input Voltage, Auxiliary Input 24 − 57 V

Output Voltage − 12 − V

Output Current − − 2.5 A

Oscillator Frequency − 250 − kHz

Output Ripple − − 170 mV

Efficiency − − 88 %

http://onsemi.com

EVAL BOARD USER’S MANUAL

NCP1083QBCGEVB

http://onsemi.com

2

Table 2. BOARD CONNECTOR DESCRIPTION

Connector Pin Description

P1 1 nClassAT, Notification Towards External Processor that IEEE802.3at, 2nd Event Classification

Has Completed

2 Not Connected

3 Vin, PoE, Pair 1

4 Vin, PoE, Pair 1

5 Vin, PoE, Pair 2

6 Vin, PoE, Pair 2

7 Vaux, Positive Auxiliary Input Supply

8 Vaux_gnd, Auxiliary Input Supply Ground

Jout 1 12 V Regulated Output

2 12 V Regulated Output

3 12 V Regulated Output

4 GND Regulated Output

5 GND Regulated Output

6 GND Regulated Output

Figure 3. Layout Front Figure 4. Layout Back

Figure 5. Silkscreen Front Figure 6. Silkscreen Back