TPS23758
- Complete IEEE 802.3at PD solution for type 1 PoE
- Ethernet Alliance (EA) logo certified designs available
- Robust 100-V, 0.36-Ω (typ) hotswap MOSFET
- Integrated PWM controller with 0.77-Ω (typ) 150-V power MOSFET
- Flyback controller with PSR
- Supports CCM operation with secondary side synchronous FET— multi-outputs
- ±1% (typ, 5-V Output) Load regulation (0-100% load range) — with Sync FET
- Supports low-side switch buck topology
- Adjustable switching frequency with synchronization
- Soft-start control with advanced startup
- Programmable slew rate and frequency dithering for enhanced EMI reduction
- Flyback controller with PSR
- Primary adapter priority input
- –40°C to 125°C Junction temperature range
- Small 6-mm x 4-mm VSON package
The TPS23758 device combines a Power over Ethernet (PoE) powered device (PD) interface, a 150-V switching power FET, and a current-mode DC-DC controller optimized for flyback topology. The high level of integration along with primary side regulation (PSR), spread spectrum frequency dithering (SSFD), and advanced startup makes the TPS23758 an ideal solution for size-constrained applications. The PoE implementation supports the IEEE 802.3at standard as a 13-W, Type 1 PD.
The PSR feature of the DC-DC controller uses feedback from an auxiliary winding for control of the output voltage, eliminating the need for external shunt regulator and optocoupler. It is optimized for operation in continuous conduction mode (CCM) with secondary side synchronous rectification, resulting in optimum overall efficiency, regulation accuracy and step load response over multiple outputs (for example 5-V and 3.3-V output). Typically, the converter operates at a switching frequency of 250 kHz.
SFFD and slew rate control helps to minimize the size and cost of the EMI filter. Advanced Startup allows the use of minimal bias capacitor while simplifying converter startup and hiccup design.
Primary auxiliary power detect (APD) pin can be used to provide priority for a primary side power adapter.
The DC-DC controller features adjustable soft-start, slope compensation, and blanking. For non-isolated applications, the buck topology is also supported by the TPS23758.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | TPS23758 IEEE 802.3at PoE PD with No-Opto Flyback DC-DC Controller datasheet (Rev. A) | 2020年 11月 25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 | |
EVM User's guide | TPS23758EVM-080 Evaluation Module (Rev. B) | PDF | HTML | 2020年 12月 14日 | |
Analog Design Journal | A small-footprint PoE solution for machine-vision cameras and sensors | 2019年 9月 30日 | ||
Technical article | How to reduce the size of your 13-W PoE PD solution | PDF | HTML | 2019年 6月 25日 |
設計與開發
如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。
TPS23758EVM-080 — 適合 IEEE 802.3at Type 1 PoE PD 應用的 TPS23758 評估模組
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
TIDA-010083 — 適用於機器視覺攝影機和視覺感測器的高密度隔離式 PoE 和 GigE 參考設計
封裝 | 引腳 | 下載 |
---|---|---|
VSON (RJJ) | 23 | 檢視選項 |
訂購與品質
- 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
- 資格摘要
- 進行中可靠性監測
- 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。