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User's Guide
SLVU197B – March 2007 – Revised September 2007
TPS2376HEVM
This user’s guide describes the characteristics, operation, and use of the TPS2376HEVM, demonstrating
high-power, Power-over-Ethernet (PoE). Typical PoE applications consist of two parts:
• Power Sourcing Equipment (PSE) that injects power into the Ethernet Category 5 (CAT5) cable and
• Powered Devices (PD) that connect to the CAT5 cable to receive power.
This evaluation board demonstrates a complete PD solution including detection, classification, and current
limiting required for many PoE applications and delivers an isolated 5 V at 5 A to the load.
The theory and general application of PoE is beyond the scope of this User’s Guide, so for a broader
description see the application material listed in the Related Materials from Texas Instruments section.
This User’s Guide includes setup instructions, a schematic diagram, a bill of materials (BOM) and
PCB-layout drawings for the TPS2376HEVM.
Contents
1 Related Documentation From Texas Instruments ....................................................................... 2
2 Introduction ................................................................................................................... 2
3 Setup .......................................................................................................................... 2
4 Board Layout ................................................................................................................. 7
5 Bill of Materials and Schematics ......................................................................................... 10
List of Figures
1 5-V Output Startup Waveform .............................................................................................. 4
2 TP13 Waveform, 5-V Output Ripple Voltage ............................................................................. 4
3 Efficiency ...................................................................................................................... 5
4 Booster Circuit Current Distribution ....................................................................................... 5
5 Loop Gain and Phase Margin .............................................................................................. 6
6 Top-Side Layout ............................................................................................................. 7
7 Bottom-Side Layout.......................................................................................................... 8
List of Tables
1 Bill of Materials ............................................................................................................. 10
PowerPAD is a trademark of Texas Instruments.
SLVU197B – March 2007 – Revised September 2007 TPS2376HEVM 1
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