PoE PSE Type 2 (30W) IEEE 802.3at Fully Autonomous Quad Port Solution.
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A fully autonomous IEEE802.3at, Type 2 (30W) Power-over-Ethernet (PoE) 4 Port Power Sourcing Equipment (PSE) solution. An additional configuration of two non-standard, high power ports (<60W) is provided. Both configurations support Gigabit Ethernet data pass through in 1000BASE-T ports.

This reference design is made up of two boards: Motherboard (TPS23861EVM-612) and Daughter board (TPS23861EVM-613). The daughter board features two TPS23861 IEEE 802.3at PoE PSE controller devices. The motherboard provides a multi-port base platform interface for the daughter board. Additionally, the motherboard provides interfaces for two optional boards: MSP-EXP430G2 LaunchPad™ (if custom Power Management programmability is desired) and USB-TO-GPIO Interface Adapter (if PC GUI based Power Management configuration is desired).

The complete solution has undergone exhaustive PoE testing and passes all industry-recognized conformance/interoperability test suites allowing customers to copy/paste the design without concern. The 2-layer PCB, daughter card, design delivers all of this on a low cost platform.


• TPS23861 PSE devices default to full autonomous mode so no digital interface is required
• Passes UNH-IOL PoE Conformance/Interoperability and SIFOs Type 1/Type 2 Test Suites
• Four IEEE802.3at, Type 2 (30 W) ports and Two non-standard, high power (<60W) ports supported
• Entire design is powered by a single DC supply. Logic power is delivered by an on board 3.3V regulator (LM5007)
• I2C interface allows programming via PC-based-GUI, or Microcontroller based code
• Port ON status LEDs provides simple status indication in fully autonomous mode

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Schematic/Block Diagram

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Test Data

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(Output Voltage 1)
Vin (Min) (V)44
Vin (Max) (V)57
Vout (Nom) (V)48
Iout (Max) (A).6
Output Power (W)28.8
Input TypeDC
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TPS23861EVM-612 :
TPS23861EVM: Evaluation Module for the TPS23861 QUAD IEEE 802.3at POWER-OVER-ETHERNET PSE CONTROLLER


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USB Interface Adapter EVM


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TI Devices (3)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISO7241C  Quad-channel, 3/1, 25-Mbps digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LM5007  9-75V Wide Vin, 500mA Constant On-Time Non-Synchronous Buck Regulator  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS23861  2-pair, type-2, 4-channel Power-over-Ethernet (PoE) PSE with autonomous mode  Power over Ethernet (PoE) ICs  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ISO7241C Download Download
LM5007 Download Download
Download Download
TPS23861 Download Download

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Technical documentation

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Application note (2)
Title Type Size (KB) Date
PDF 916 11 Jun 2014
PDF 1736 25 Apr 2014
Design files (12)
Title Type Size (KB) Date
ZIP 1078 24 Jul 2014
ZIP 2482 24 Jul 2014
ZIP 204 24 Jul 2014
ZIP 318 24 Jul 2014
PDF 1190 24 Jul 2014
PDF 2179 24 Jul 2014
PDF 274 24 Jul 2014
PDF 328 24 Jul 2014
PDF 94 24 Jul 2014
PDF 97 24 Jul 2014
PDF 171 24 Jul 2014
PDF 274 24 Jul 2014
Related Tools & Software

Hardware development (3)

Name Part Number Tool Type
MSP430G2 LaunchPad Development kit  MSP-EXP430G2  Evaluation board 
TPS23861EVM-612 Evaluation Module for Quad IEEE 802.3at PoE PSE Controller  TPS23861EVM-612  Evaluation board 
USB Interface Adapter EVM  USB-TO-GPIO  Interface adapter 

Software development (1)

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