TPS23755
- 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
- Programmable classification level
- Integrated PWM controller with 0.77-Ω (typ) 150-V power MOSFET
- Flyback controller with PSR
- Supports CCM operation with secondary side diode rectifier
- ±3% (typ, 12-V Output) Load regulation (5%-100% range)
- Supports low-side switch buck topology
- Adjustable switching frequency with synchronization
- advanced startup
- Programmable slew rate and frequency dithering for enhanced EMI reduction
- Flyback controller with PSR
- Secondary side adapter priority control with smooth transition
- –40°C to 125°C Junction temperature range
- Small 6-mm x 4-mm VSON package
The TPS23755 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 TPS23755 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 with secondary side diode rectifier (typically 12-V output or higher). Typically, the converter operates in continuous conduction mode (CCM) 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.
Secondary auxiliary power detect capability provides priority for a secondary side power adapter, while ensuring smooth transition to and from PoE input power, with no efficiency or thermal trade-off.
The DC-DC controller features internal soft-start, slope compensation, and blanking. For non-isolated applications, the buck topology is also supported by the TPS23755.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TPS23755 IEEE 802.3at PoE PD with No-Opto Flyback DC-DC Controller datasheet (Rev. B) | PDF | HTML | 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 | |
| Technical article | How to reduce the size of your 13-W PoE PD solution | PDF | HTML | 2019年 6月 25日 | |
| Application note | Lightning Surge Considerations for PoE Powered Devices | 2015年 4月 30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 | ||
| Application note | Practical Guidelines EMI Compliant PoE | 2008年 3月 27日 |
設計與開發
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TPS23755EVM-894 — 適合 IEEE802.3at Type 1 PoE PD 應用的 TPS23755 評估模組
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TIDA-010046 — 配備 IEEE802.3at Type-1 (≤ 12.95 W) PoE-PD 且符合 EMC 規範的 10/100-Mbps 乙太網路 PHY 參考設計
TIDA-010034 — IEEE802.3at Type-1 PoE 和 12V 適配器輸入到 IP 網路攝影機的負載點參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSON (RJJ) | 23 | Ultra Librarian |
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
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
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