TPS23880 Datasheet | Texas Instruments

Features - IEEE 802.3bt PSE solution for Po E 2 Type 3 or Type 4 Power Over Ethernet applications - Eight independent PSE channels - SRAM Programmable memory - Programmable power limiting accuracy ±3% - Selectable 2-pair or 4-pair port power allocations - 15.4 W, 30 W, 45 W, 60 W, 75 W or 90 W - Single and dual signature PD patibility - Dedicated 14-bit integrating current ADC per port - Inherent filtering - Noise immune MPS for DC disconnect - 2% Current sensing accuracy - 100-ms Rolling port current averaging - 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 TPS23880 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 eight individual power channels can be configured in any bination of 2-Pair (1-channel) or 4-Pair (2-channels) Po E Ports. The PSE controller can detect powered devices (PDs) that have a valid signature, plete mutual identification, and apply power. 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 ±3% accurate programmable port power limit provides the ability to expand the maximum power sourced above 90 W without exceeding 100 W while also making system level power management control...