Texas Instruments Evaluation Module for TPS23851 High Power, Wide Voltage Range Quad Port Ethernet PSE Manager TPS23851E TPS23851EVM-001 데이터 시트
제품 코드
TPS23851EVM-001
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Hardware Connections
4
Hardware Connections
4.1
PCB Assemblies
The HPA677 is a backplane board. The HPA677 has two power supplies, the power-over-Ethernet ports
and the USB to I
and the USB to I
2
C interface to support the HPA676. The HPA676 connects to the backplane board. The
HPA676 has the TPS23851 PSE controller and a power supply for the TPS23851. It controls port
connection to a valid PD.
connection to a valid PD.
Plug the HPA676 PCB assembly into the HPA677 backplane by aligning the three 10-pin connectors on
each board. See Board alignment photo,
each board. See Board alignment photo,
.
Figure 1. Board Alignment
4.2
Power Supplies
Use either a laptop computer power supply or if not available, a lab power supply. No adjustment is
necessary with the laptop supply. Just plug the supply into J17.
necessary with the laptop supply. Just plug the supply into J17.
With the lab power supply, if used, you must disconnected the output, turn on the power supply and adjust
the output voltage to 24 V +/-2 V. Adjust the supply current limit to 3 A. Connect the power supply output
to J9-1 and the supply GND to J9-2.
the output voltage to 24 V +/-2 V. Adjust the supply current limit to 3 A. Connect the power supply output
to J9-1 and the supply GND to J9-2.
Connector J16 can be used to by-pass the 24-V to 54-V converter. This may be done if there is need to
vary 54 V when injecting a voltage into J16, remove any other input power at either J17 or at J9 when
using J16.
vary 54 V when injecting a voltage into J16, remove any other input power at either J17 or at J9 when
using J16.
3
SLUU492 – February 2011
Using the TPS23851EVM-001
© 2011, Texas Instruments Incorporated