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.
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | High Efficiency PoE Interface and DC/DC Controller データシート (Rev. D) | 2013/11/20 | |||
| アプリケーション・ノート | PoE Powered Devices Debug Guidelines | PDF | HTML | 2021/07/19 | |||
| アプリケーション・ノート | PoE PD Schematic Review Guidelines | PDF | HTML | 2021/04/29 | |||
| セレクション・ガイド | 電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版) | 英語版 (Rev.R) | 2018/09/13 | |||
| アプリケーション・ノート | Lightning Surge Considerations for PoE Powered Devices | 2015/04/30 | ||||
| アプリケーション・ノート | Implementing a Buck Converter With the TPS23753A | 2010/09/20 | ||||
| アプリケーション・ノート | Using the TPS23753A with an External Error Amplifier | 2010/08/06 | ||||
| アプリケーション・ノート | Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) | 2009/02/09 | ||||
| アプリケーション・ノート | PoE Powered Device for 24 VAC Building Power Applications | 2008/09/10 | ||||
| アプリケーション・ノート | Designing an EMI Compliant PoE with Isolated Flyback | 2008/05/20 | ||||
| アプリケーション・ノート | Practical Guidelines EMI Compliant PoE | 2008/03/27 |
設計と開発
その他のアイテムや必要なリソースを参照するには、以下のタイトルをクリックして詳細ページをご覧ください。
TPS23757EVM — 評価モジュール、TPS23757 用
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 (...)
SLUC480 — PoE PD Efficiency Calculator
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |
購入と品質
推奨製品には、この TI 製品に関連するパラメータ、評価基板、またはリファレンス デザインが存在する可能性があります。