計算工具
TPS23751
- IEEE 802.3at Classification With Status Flag
- High Efficiency Solutions Over Wide Load Range
- Powers Up to 25.5 W PDs
- Robust 100 V, 0.5 Ω Hotswap MOSFET
- Synchronous Rectifier Disable Signal
- PowerPAD™ TSSOP Packages
- Complete PoE Interface Plus DC-DC Controller
- Adapter ORing Support
- Programmable Frequency
- TPS23752 Supports Ultra-Low Power Sleep Modes
- –40°C to 125°C Junction Temperature Range
The TPS23751 is a 16-pin integrated circuit that combines a Power-over-Ethernet (PoE) powered device (PD) interface and a current-mode DC-DC controller optimized specifically for applications requiring high efficiency over a wide load range.
The PoE interface implements type-2 hardware classification per IEEE 802.3at. It also includes an auxiliary power detect (APD) input and a disable function (DEN). A 0.5-Ω, 100-V pass MOSFET minimizes heat dissipation and maximizes power utilization.
The DC-DC controller features internal soft-start, a bootstrap startup current source, current-mode control with slope compensation, blanking, and current limiting. Efficiency is enhanced at light loads by disabling synchronous rectification and entering variable frequency operation (VFO).
The TPS23752 is a 20-pin extended version of the TPS23751 with the addition of a Sleep Mode feature. Sleep Mode disables the converter to minimize power consumption while still generating the Maintain Power Signature (MPS) required by IEEE802.3at.
技術文件
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檢視所有 10 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TPS2375x IEEE 802.3at PoE Interface With Flyback DC-DC Controller datasheet (Rev. E) | PDF | HTML | 2018年 1月 26日 |
| Application note | PoE Powered Devices Debug Guidelines | PDF | HTML | 2021年 7月 19日 | |
| Application note | PoE PD Schematic Review Guidelines | PDF | HTML | 2021年 4月 29日 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| Technical article | Maximizing PoE PD efficiency on a budget | PDF | HTML | 2015年 11月 10日 | |
| Application note | Lightning Surge Considerations for PoE Powered Devices | 2015年 4月 30日 | ||
| User guide | TPS23751EVM-104 EVM: Evaluation Module for TPS23751 (Rev. A) | 2012年 11月 2日 | ||
| Application note | High Efficiency Class 4 PoE Powered Device | 2011年 3月 23日 | ||
| Application note | Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) | 2009年 2月 9日 | ||
| Application note | Designing an EMI Compliant PoE with Isolated Flyback | 2008年 5月 20日 |
設計與開發
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開發板
TPS23751EVM-104 — TPS23751 評估模組
TPS23751EVM-104 contains evaluation and reference circuitry for the TPS23751, which is a Class 4 (25.5W) PoE PD + PWM Controller. The TPS23751 is targeted at flyback only applications and is compliant with the IEEE 802.3at Power over Ethernet (PoE) standard. This EVM contains input & output (...)
使用指南: PDF
模擬工具
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
參考設計
TIDA-00617 — 適用於 PoE PD 應用的 4 級高效率驅動式返馳轉換器 (5V/5A) 參考設計
The TIDA-00617 reference design uses the TPS23751 PoE PD controller in a high effciency (driven) synch flyback converter capable of 5V at 5A.
參考設計
PMP20220 — 4 級高效率 PoE 返馳同步轉換器 (5V/3A) 參考設計
This reference design utilizes the TPS23751 combination PoE PD controller and PWM controller, saving cost and size. The synchronous flyback converter provides high efficiency for PoE applications such as wireless access points and IP phones. The PoE PD can also supply up to 10W of (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
訂購與品質
內含資訊：
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
內含資訊：
- 晶圓廠位置
- 組裝地點
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。