計算工具
TPS23757
- Powers up to 13 W (Input) PDs
- Legacy and IEEE 802.3at Type 1 PDs
- Optimized for Isolated DC/DC Converters
- Supports High-Efficiency Topologies
- Complete PoE Interface
- Adapter ORing Support
- Programmable Frequency with Synch.
- Robust 100 V, 0.5 Ω Hotswap MOSFET
- Pin Compatible with TPS23754/6
- –40°C to 125°C Junction Temperature Range
- Industry Standard TSSOP-20
The TPS23757 is 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 for a type 1 PD, which is equivalent to the 13W standard of IEEE 802.3-2008.
The TPS23757 supports a number of input voltage ORing options including highest voltage, external adapter preference, and PoE preference.
The TPS23757 has an output flag indicating if an external wall adapter is active when used in conjunction with ORing controls. 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 design of highly-efficient flyback topologies or active-clamp forward or flyback converters. The second gate driver may be disabled if desired for single MOSFET topologies. The controller also features internal softstart, bootstrap startup 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 TPS23757 has a 9 V converter startup, permitting operation with 12 V wall adapters.
技術文件
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檢視所有 12 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | High Efficiency PoE Interface and DC/DC Controller datasheet (Rev. D) | 2013年 11月 20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 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| Application note | Lightning Surge Considerations for PoE Powered Devices | 2015年 4月 30日 | ||
| Application note | Implementing a Buck Converter With the TPS23753A | 2010年 9月 20日 | ||
| User guide | TPS23757EVM: Evaluation Module for TPS23757 (Rev. B) | 2010年 8月 30日 | ||
| Application note | Using the TPS23753A with an External Error Amplifier | 2010年 8月 6日 | ||
| Application note | Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) | 2009年 2月 9日 | ||
| Application note | PoE Powered Device for 24 VAC Building Power Applications | 2008年 9月 10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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開發板
TPS23757EVM — 適用於 TPS23757 的 22-57 Vin、5 Vout 高效 PoE 介面和 DC/DC 控制器評估模組
The TPS23757EVM contains evaluation and reference circuitry for the TPS23757. The TPS23757 contains a powered device (PD) and a power supply controller supporting many high-efficiency topologies. The TPS23757EVM supports the IEEE 802.3at (draft) standard for a type 1 PD (equivalent to the 13W (...)
使用指南: PDF
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 (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |
訂購與品質
內含資訊：
- 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
內含資訊：
- 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。