計算工具
TPS23754-1
- 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
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檢視所有 10 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TPS2375x IEEE 802.3at, High Efficiency, PoE Interface and DC-DC Controller datasheet (Rev. I) | PDF | HTML | 2017年 12月 19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 | |
| User guide | TPS23754EVM-383 EVM: Evaluation Module for TPS23754. (Rev. C) | 2011年 11月 28日 | ||
| Application note | Implementing a Buck Converter With the TPS23753A | 2010年 9月 20日 | ||
| Application note | Using the TPS23753A with an External Error Amplifier | 2010年 8月 6日 | ||
| User guide | TPS23754EVM-420 EVM: Evaluation Module for TPS | 2009年 4月 17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
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) (...)
使用指南: PDF
開發板
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) (...)
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 | 引腳 | 下載 |
|---|---|---|
| HTSSOP (PWP) | 20 | 檢視選項 |
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