TPS23754
- Powers up to 30-W (Input) PDs
- DC-DC Control Optimized for Isolated Converters
- Supports High-Efficiency Topologies
- Complete PoE Interface
- Enhanced Classification per IEEE 802.3at With Status Flag
- Adapter ORing Support
- Programmable Frequency With Synchronization
- Robust 100-V, 0.5-Ω Hotswap MOSFET
- –40°C to 125°C Junction Temperature Range
- Industry Standard PowerPAD™ HTSSOP-20
The TPS23754 and TPS23756 devices have a combined power-over-ethernet (PoE), powered-device (PD) interface, and current-mode DC-DC controller optimized specifically for isolated converters. The PoE interface supports the IEEE 802.3at standard.
The TPS23754 and TPS23756 support a number of input voltage ORing options including highest voltage, external adapter preference, and PoE preference. These features allow the designer to determine which power source will carry the load under all conditions.
The PoE interface features the new extended hardware classification necessary for compatibility with high-power midspan power sourcing equipment (PSE) per IEEE 802.3at. The detection signature pin can also be used to force power from the PoE source off. Classification can be programmed to any of the defined types with a single resistor.
The DC-DC controller features two complementary gate drivers with programmable dead time. This simplifies the design of active-clamp forward converters or optimized gate drive for highly-efficient flyback topologies. The second gate driver may be disabled if desired for single MOSFET topologies. The controller also features internal soft start, bootstrap start-up source, current-mode compensation, and a 78% maximum duty cycle. A programmable and synchronizable oscillator allows design optimization for efficiency and eases use of the controller to upgrade existing power supply designs. Accurate programmable blanking, with a default period, simplifies the usual current-sense filter design trade-offs.
The TPS23754 device has a 15-V converter start-up while the TPS23756 device has a 9-V converter start-up. The TPS23754-1 replaces the PPD pin with a no-connect for increased pin spacing.
技術文件
設計與開發
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TPS23754EVM-383 — 適用於 TPS23754 的 33-57V Vin、12V Vout 高功率評估模組
TPS23754EVM-383 contains evaluation and reference circuitry for the TPS23754, which is a Class 4 (25.5 W) PoE PD + PWM Controller. The TPS23754 is targeted at wide Vin aplications (24 V - 60 V) in isolated converter topologies and is compliant with the IEEE 802.3 at Power over Ethernet (PoE) (...)
TPS23754EVM-420 — 適用於 TPS23754 的 20-57V Vin、5V Vout 高功率評估模組
TPS23754EVM-420 contains evaluation and reference circuitry for the TPS23754, which is a Class 4 (25.5 W) PoE PD + PWM Controller. The TPS23754 is targeted at wide Vin aplications (24 V - 60 V) in isolated converter topologies and is compliant with the IEEE 802.3at Power over Ethernet (PoE) (...)
SLUC480 — PoE PD Efficiency Calculator
PMP10288 — 4 級 PoE 高效率主動鉗位順向式轉換器 (3.3V) 參考設計
PMP10288 參考設計是一款乙太網路供電 (POE) 主動箝位順向轉換器。其採用 TPS23754，這是 POE 受電裝置 (PD) 控制器與 PWM 控制器的組合。CSD17501Q5A FET 用於高效率同步整流。輸入接受 42.5VDC-57VDC 的標準 Type 2 POE 電壓或 36VDC-57VDC 的輔助電壓。輸出功率在 PoE 輸入時為隔離式 3.3VDC/6.9A，或在輔助輸入時為 3.3VDC/7.2A。
PMP22301 — 4 類 PoE PD (24-V/0.9-A) 電源供應參考設計
是單一封裝中的 PD/PWM 控制器組合，可節省成本與空間。此參考設計適合許多 PoE 應用，如無線存取點，音訊，看板和 IP 攝影機。
PMP6812 — 適用於 PoE 應用的第 4 級成本最佳化返馳式轉換器參考設計
This reference evaluation module, featuring the TPS23754 PoE interface and DC-to-DC controller is used for class 4 PoE applications.
The flyback topology with diode rectification results in a low-cost converter for PoE applications such as a security camera. With the appropriate BOM changes, PMP6812 (...)
PMP9563 — 適用於 PoE PD 應用的 4 級 12V/2.5A 主動鉗位順向式轉換器參考設計
此參考設計是一款乙太網路供電 (POE) 主動箝位順向轉換器。其採用 TPS23754，這是 POE 受電裝置 (PD) 控制器與 PWM 控制器的組合。CSD19534Q5A FET 用於高效率同步整流。輸入接受 42.5VDC-57VDC 的標準 Type 2 POE 電壓或 36VDC-57VDC 的輔助電壓。輸出功率在 PoE 輸入時為隔離式 12VDC/1.9A，或在輔助輸入時為 12VDC/2.5A。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
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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。