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User's Guide
SLVU329A–September 2009–Revised March 2010
TPS23756EVM
This user’s guide describes the TPS23756 evaluation module (TPS23756EVM). The TPS23756EVM
contains evaluation and reference circuitry for the TPS23756. The TPS23756 integrates a powered-device
(PD) controller and power-supply controller targeted at high-power, wide input range, isolated converter
topologies. The TPS23756 is compliant with the IEEE 802.3at Power over Ethernet (PoE) standard.
Contents
1 Description ................................................................................................................... 2
1.1 Features ............................................................................................................. 2
1.2 Applications ......................................................................................................... 2
2 Electrical Specifications .................................................................................................... 3
3 Schematic .................................................................................................................... 4
4 General Configuration and Description .................................................................................. 5
4.1 Physical Access .................................................................................................... 5
5 Test Setup ................................................................................................................... 7
6 TPS23756EVM Typical Performance Data .............................................................................. 7
6.1 5-V DC/DC Efficiency .............................................................................................. 7
6.2 TPS23756EVM Conducted Emissions .......................................................................... 9
7 EVM Assembly Drawings and Layout Guidelines ...................................................................... 9
7.1 PCB Drawings ...................................................................................................... 9
7.2 Layout Guidelines ................................................................................................ 11
7.3 EMI Containment ................................................................................................. 12
8 Bill of Materials ............................................................................................................. 13
List of Figures
1 TPS23756EVM Schematic (DC-DC Converter)......................................................................... 4
2 TPS23756EVM Schematic (PoE and Adapter Input Terminals)...................................................... 5
3 Typical TPS23756EVM Test Setup....................................................................................... 7
4 TPS23756EVM Efficiency With 12-V Input.............................................................................. 8
5 TPS23756EVM Efficiency With 24-V Input.............................................................................. 8
6 TPS23756EVM Efficiency With 48-V Input.............................................................................. 9
7 TPS23756EVM Conducted Emissions................................................................................... 9
8 Top-Side Layout/Routing ................................................................................................. 10
9 Layer-Two Routing ........................................................................................................ 10
10 Layer-Three Routing ...................................................................................................... 11
11 Bottom-Side Placement/Routing......................................................................................... 11
List of Tables
1 TPS23756EVM Electrical and Performance Specifications........................................................... 3
2 Connector Functionality .................................................................................................... 6
3 Test Points................................................................................................................... 6
4 TPS23756EVM Bill of Materials ......................................................................................... 13
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SLVU329A–September 2009–Revised March 2010 TPS23756EVM
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