Texas Instruments TPS23861EVM-612 | Demoboard TPS23861EVM-612

Description

The TPS23861 is an easy-to-use, flexible, IEEE802.3at PSE solution. As shipped, it automatically manages four 802.3at ports without the need for any external control.

The TPS23861 automatically detects Powered Devices (PDs) that have a valid signature, determines power requirements according to classification and applies power. Two-event classification is supported for type-2 PDs. The TPS23861 supports DC disconnection and the external FET architecture allows designers to balance size, efficiency and solution cost requirements.

The unique pin-out enables 2-layer PCB designs via logical grouping and clear upper and lower differentiation of I2C and power pins. This delivers best-in-class thermal performance, Kelvin accuracy and low-build cost.

In addition to automatic operation, the TPS23861 supports semi auto-mode via I2C control for precision monitoring and intelligent power management. Compliance with the 400-ms TPON specification is ensured whether in semi-automatic or automatic mode.

Features

• • TPS23861 PSE devices default to auto-mode operation so no operator interface over I2C 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 I2C interface to both TPS23861PW devices from either USB-TO-GPIO or MSP-EXP430G2.
• • Port ON status LEDs
• • User test points

Typical applications

• Wireless Backhaul
• PoE Pass-Through Systems
• Ethernet Switches and Routers
• Surveillance NVR and DVRs

More information

• Datasheet
• IC product information