Texas Instruments TPS23882RTQR | Demoboard TIDA-050026-23882

Description

This reference design showcases a Type-3, 30W, 2-Pair 24-port Ethernet switch for Power over Ethernet (PoE) applications which can send up to 30W per port for IEEE 802.3bt Type 3 applications and up to 60W per port for non-standard applications. Based on the MSP430F523x family, TI's TPS2388x FirmPSE system firmware provides a total system level solution for multi-port applications which reduces time to market and frees-up valuable software resources. This design supports port power management with priority, multiple power supplies, legacy PD detection, field upgradability, UART/I2C communication with the host, and more. TI’s FirmPSE system firmware GUI for this design enables the customization of production level PSE system firmware code with just a few clicks of a button and provides real-time communication to the system. In addition, two of these designs may be cascaded through the edge connectors in order to support up to 48-port PSE systems.

Features

• IEEE 802.3bt PSE solution for PoE 2 Type-3 2-Pair Power Over Ethernet applications
• Compatible with TI's FirmPSE system firmware
• SRAM Programmable memory
• Programmable power limiting accuracy ±3%
• 200-mΩ Current sense resistor
• Legacy PD capacitance measurement
• Selectable 2-pair port power allocations– 4 W, 7 W, 15.4 W, or 30 W
• Dedicated 14-bit integrating current ADC per port– Noise immune MPS for DC disconnect– 2% Current sensing accuracy
• 1- or 3-Bit fast port shutdown input
• Auto-class discovery and power measurement
• Never Fooled 4-Point detection
• Inrush and operational foldback protection
• 425-mA and 1.25-A Selectable current limits
• Port re-mapping
• 8-Bit or 16-bit I2C communication
• Flexible processor controlled operating modes– Auto, semi auto and manual / diagnostic
• Per Port voltage monitoring and telemetry
• –40°C to +125°C Temperature operation

More information

• Datasheet
• IC product information