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TPS23751

現行

具返馳 DC-DC 控制器的 IEEE 802.3at PoE 介面

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TPS23751

現行
產品規格表 立即訂購

產品詳細資料

PoE standards supported 802.3at Type 1 (802.3af), 802.3at Type 2 PD power level 13W, 25W DC/DC control PD and DC/DC Vin (max) (V) 57 Vin (min) (V) 9.2 PoE current limit (min) (mA) 850 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 450 Features Primary-side adapter priority, Thermal shutdown, VFO Fault response Auto Retry Operating temperature range (°C) -40 to 85 Rating Catalog
PoE standards supported 802.3at Type 1 (802.3af), 802.3at Type 2 PD power level 13W, 25W DC/DC control PD and DC/DC Vin (max) (V) 57 Vin (min) (V) 9.2 PoE current limit (min) (mA) 850 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 450 Features Primary-side adapter priority, Thermal shutdown, VFO Fault response Auto Retry Operating temperature range (°C) -40 to 85 Rating Catalog
HTSSOP (PWP) 16 32 mm² (5 mm × 6.4 mm)
  • 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
  • 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.

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.

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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 TPS2375x IEEE 802.3at PoE Interface With Flyback DC-DC Controller datasheet (Rev. E) PDF | HTML 2018/1/26
應用說明 PoE Powered Devices Debug Guidelines PDF | HTML 2021/7/19
應用說明 PoE PD Schematic Review Guidelines PDF | HTML 2021/4/29
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
技術文章 Maximizing PoE PD efficiency on a budget PDF | HTML 2015/11/10
應用說明 Lightning Surge Considerations for PoE Powered Devices 2015/4/30
應用說明 High Efficiency Class 4 PoE Powered Device 2011/3/23
應用說明 Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) 2009/2/9
應用說明 Designing an EMI Compliant PoE with Isolated Flyback 2008/5/20

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
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計算工具

SLUC480 — PoE PD Efficiency Calculator

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參考設計

PMP11254 — 4 級 PoE 返馳式轉換器 (12V@2.125A) 參考設計

具二極體整流的返馳拓撲提供適合 4 類 PoE 應用的低成本解決方案。TPS23751 是乙太網路供電 (PoE) 供電裝置 (PD)控制器和 PWM 控制器的組合，可節省成本與電路板空間。此轉換器非常適合如安全攝影機和無線接入點等 PoE 應用。
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參考設計

PMP20220 — 4 級高效率 PoE 返馳同步轉換器 (5V/3A) 參考設計

此參考設計採用 TPS23751 組合式 PoE PD 控制器與 PWM 控制器，可節省成本並縮小尺寸。  同步返馳式轉換器可為無線存取點與 IP 電話等 PoE 應用提供高效率。  PoE PD 也可為輔助電路提供最高 10W 的主電源。
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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

TIDA-00617 參考設計採用 TPS23751 PoE PD 控制器，構成高效率（驅動）同步返馳式轉換器，能夠提供 5V 5A 的輸出。

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HTSSOP (PWP) 16 Ultra Librarian
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