Texas Instruments TPS23861EVM-612, User Manual, Page: 3 / 39

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Description
1 Description
The TPS23861EVM-612 features the quad port, TPS23861, IEEE 802.3at PoE PSE controller. The EVM
consists of a motherboard (TPS23861EVM-612) and daughter board (TPS23861EVM-613) containing two
TPS23861 devices. The TPS23861EVM-612 provides a multi-port base platform interface for
TPS23861EVM-613, MSP-EXP430G2 (LaunchPad™), and USB-TO-GPIO (USB Interface Adapter).
1.1 Features
• TPS23861 PSE devices default to auto-mode operation so no operator interface over I
2
C is required.
• Four IEEE802.3at, Type 2 (30 W) ports with 1000BASE-T (gigabit Ethernet data pass through)
• Two non-standard, high power ports with 1000BASE-T (gigabit Ethernet data pass through)
• Fully certified using UNH-IOL Clause #33 PSE Conformance Test Suite
• Single DC power supply input
• On board 3.3-V regulator
• On board I
2
C interface to both TPS23861PW devices from either USB-TO-GPIO or MSP-EXP430G2.
• Port ON status LEDs
• User test points
1.2 Applications
• Ethernet switches and routers
• Surveillance VDRs
• High power PoE
• PoE pass-through systems
2 Quick Start
2.1 Input Power
2.1.1 Input Power (Labeled VPWR)
DC input voltage is provided through J1 (screw jack). A dc power supply or laptop adapter with sufficient
current capacity can power the EVM.
CAUTION
Reverse voltage protection is not provided; ensure that the correct polarity is
applied to J1.
This dc input is labeled VPWR in the schematics and is used for port VBUS as well as for the TPS23861
devices. The VPWR connections to the PoE ports are not fused. Each two pair port is capable of
furnishing at least 30 W and each four pair port can furnish 60 W. The power supply requirements are
summarized in
Table 1 .
The minimum PSE port voltage is 44 VDC for type 1 and 50 V for type 2. The nominal dc voltage at
VPWR is 48 VDC for a type 1 and 54 VDC for a type 2. During evaluation, choose the appropriate dc
power supply for the type 1 or type 2 environment.
LaunchPad, Code Composer Studio are trademarks of Texas Instruments.
3 SLUUAY8C – March 2014 – Revised November 2015 TPS23861EVM-612: Auto-Mode Evaluation Module for TPS23861
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