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TPS23755

現行

IEEE 802.3at PoE PD 與無光耦返馳 DC-DC 控制器

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產品規格表

TPS23755

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 10.2 Vin (max) (V) 57 PoE current limit (min) (mA) 405 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 360 PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Fault response Auto Retry Features Advanced startup, Error amplifier, Integrated Switching FET, Primary-side regulation, Secondary-side adapter priority, Spread-spectrum frequency dithering, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog
Vin (min) (V) 10.2 Vin (max) (V) 57 PoE current limit (min) (mA) 405 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 360 PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Fault response Auto Retry Features Advanced startup, Error amplifier, Integrated Switching FET, Primary-side regulation, Secondary-side adapter priority, Spread-spectrum frequency dithering, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog
VSON (RJJ) 23 24 mm² 6 x 4
  • 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
  • Secondary side adapter priority control with smooth transition
  • –40°C to 125°C Junction temperature range
  • Small 6-mm x 4-mm VSON package
  • 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
  • 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.

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.
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TPS23758 現行 具無光返馳 DC-DC 控制器的 IEEE 802.3at PoE PD This product is recommended for 5V or lower output voltage applications in order to maintain output voltage regulation accuracy.

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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
EVM User's guide TPS23755EVM-894 Evaluation Module (Rev. A) PDF | HTML 2020年 12月 14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

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)。

開發板

TPS23755EVM-894 — 適合 IEEE802.3at Type 1 PoE PD 應用的 TPS23755 評估模組

The TPS23755 evaluation module (TPS23755EVM-894) contains evaluation and reference circuitry for the TPS23755, which is a IEEE802.3at Type 1 PoE PD controller suitable for Type 1 (13W) PoE PD applications.
使用指南: PDF | HTML
TI.com 無法提供
Gerber 檔案

TPS23755EVM-894 Gerber

SLVC738.ZIP (605 KB)
下載
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 (...)
要求
參考設計

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

此參考設計使用低功耗乙太網路實體層 (PHY) DP83825 最佳化爲 10 至 100 Mbps，支援超過 CAT5e 電纜的 150 公尺長範圍，超出了 100 公尺 (328 英尺) 的標準乙太網路距離限制。此設計包含乙太網路纜線供電，並使用 IEEE802.3at Type-1 (13 W) PoE-PD TPS23755 裝置進行數據通訊，而此裝置具有整合式一次側穩壓返馳 DC/DC 控制器。此參考設計預先符合輻射放射、ESD 及 EFT 的測試規範。
Design guide: PDF
電路圖: PDF
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

Power over Ethernet (PoE) enables power to be delivered over the same ethernet cable as data with no danger of cross-talk, interference, or corruption of the data streams. This reference design showcases end-to-end power tree for an IP network camera powered using PoE or 12-V adapter based on the (...)
Design guide: PDF
電路圖: PDF
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VSON (RJJ) 23 檢視選項
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