TPS23880
- IEEE 802.3bt PSE solution for PoE 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 compatibility
- 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-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
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 combination of 2-Pair (1-channel) or 4-Pair (2-channels) PoE Ports. The PSE controller can detect powered devices (PDs) that have a valid signature, complete mutual identification, and apply power.
Programmable SRAM enables in-field firmware upgradability over I2C to ensure IEEE compliance and interoperability with the latest PoE 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 more easy to implement and reliable. The Fast Shutdown (OSS) input provides up to eight levels of per port shutdown priority for applications requiring immediate disabling of multiple ports. The 255-mΩ current sense resistor and external FET architecture allow designs to balance size, efficiency, thermal and solution cost requirements.
Port remapping and pin-to-pin compatibility with the TPS2388, TPS23881, and TPS23882 devices eases migration from previous generation PSE designs and enables interchangeable 2-layer PCB designs to accommodate different system PoE power configurations.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TPS23880 Type-4 4-Pair 8-Channel PoE 2 PSE Controller with Programmable SRAM datasheet (Rev. G) | PDF | HTML | 2020/8/14 | ||
| 設計指南 | 24-Port (4 Pair) Power Sourcing Equipment Reference Design for Multiport Applications (Rev. C) | PDF | HTML | 2026/3/31 | |||
| Application brief | How to Load TPS2388x SRAM and Parity Code Over I2C (Rev. E) | PDF | HTML | 2023/4/20 | |||
| 測試報告 | TPS23880 PoE2 Test Report | 2020/5/26 | ||||
| 技術文章 | Key considerations for designing with the new PoE standard | PDF | HTML | 2018/7/16 | |||
| 技術文章 | The new PoE standard: It’s almost here | PDF | HTML | 2018/6/6 | |||
| 應用說明 | Beyond BT High-Power PoE Solution using the TPS23880 and TPS2372-4 | 2018/4/17 | ||||
| 應用說明 | TPS23861 Power-On Considerations | 2015/7/21 |
設計與開發
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BOOST-PSEMTHR-007 — 適合 IEEE 802.3bt 就緒 PoE PSE 應用的 TPS2388x 主機板
BOOST-PSEMTHR-007 是 TPS23880 和 TPS23881 PSE 控制器的基板。此電路板包含四組 2 對埠，可用於為 IEEE 802.3at 應用傳送高達 30W/埠的功率，以及兩組 4 對埠，可用於為 IEEE 802.3bt 應用傳送高達 90W/埠的功率。
TPS23880EVM-008 — 適合 IEEE 802.3bt 就緒 PoE PSE 應用的 TPS23880 EVM 子卡
TPS23880EVM-008 是用來評估 TPS23880 的子卡，其為具有可編程 SRAM 的 4 對、Type 4、8 通道乙太網路供電 (PoE) PSE。此子卡可為 TPS23880 提供評估和參考電路，TPS23881 適合用於高功率 PSE 應用，例如校園和分公司交換器以及網路攝影機。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RTQ) | 56 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。