TPS23882 Datasheet | Texas Instruments

Features - IEEE 802.3bt PSE solution for Po E 2 Type-3 2-Pair Power Over Ethernet applications - patible with TI's Firm PSE 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-m A and 1.25-A Selectable current limits - Port re-mapping - 8-Bit or 16-bit I2C munication - Flexible processor controlled operating modes - Auto, semi auto and manual / diagnostic - Per Port voltage monitoring and telemetry - - 40°C to +125°C Temperature operation 2 Applications - Video recorder (NVR, DVR, and so forth) - Small business switch - Campus and branch switches 3 Description The TPS23882 is an 8-channel power sourcing equipment (PSE) controller engineered to insert power onto Ethernet cables in accordance with the IEEE 802.3bt standard. The PSE controller can detect powered devices (PDs) that have a valid signature, plete mutual identification, and apply power. The TPS23882 improves on the TPS2388 with reduced current sense resistors, SRAM programmability, programmable power limiting, capacitance measurement, and patibility with TI's Firm PSE system firmware (see Device parison Table). Programmable SRAM enables in-field firmware upgradability over I2C to ensure IEEE pliance and interoperability with the latest Po E enabled devices. Dedicated per port ADCs provide continuous port current monitoring and the ability to perform parallel classification measurements for faster port turn on times. A 1.25-A port current limit and adjustable power limiting allows for the support of non-standard applications above 60-W sourced. The 200-mΩ...