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TPS23757

正在供貨

具有反激式/正激式直流/直流控制器和 12V 至 57V 適配器支持的 3 級 PoE PD

產(chǎn)品詳情

PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Vin (max) (V) 57 Vin (min) (V) 9.3 PoE current limit (min) (mA) 400 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 430 Features Primary-side adapter priority, Second Gate Drive, Thermal shutdown Fault response Auto Retry Operating temperature range (°C) -40 to 125 Rating Catalog
PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Vin (max) (V) 57 Vin (min) (V) 9.3 PoE current limit (min) (mA) 400 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 430 Features Primary-side adapter priority, Second Gate Drive, Thermal shutdown Fault response Auto Retry Operating temperature range (°C) -40 to 125 Rating Catalog
TSSOP (PW) 20 41.6 mm2 6.5 x 6.4
  • 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 ? Hotswap MOSFET
  • Pin Compatible with TPS23754/6
  • –40°C to 125°C Junction Temperature Range
  • Industry Standard TSSOP-20
  • 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 ? 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.

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.

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類型 標(biāo)題 下載最新的英語版本 日期
* 數(shù)據(jù)表 High Efficiency PoE Interface and DC/DC Controller 數(shù)據(jù)表 (Rev. D) 2013年 11月 20日
應(yīng)用手冊 PoE PD 原理圖審查指南 英語版 PDF | HTML 2022年 1月 3日
應(yīng)用手冊 PoE Powered Devices Debug Guidelines PDF | HTML 2021年 7月 19日
選擇指南 電源管理指南 2018 (Rev. K) 2018年 7月 31日
選擇指南 電源管理指南 2018 (Rev. R) 2018年 6月 25日
應(yīng)用手冊 Lightning Surge Considerations for PoE Powered Devices 2015年 4月 30日
應(yīng)用手冊 Implementing a Buck Converter With the TPS23753A 2010年 9月 20日
用戶指南 TPS23757EVM: Evaluation Module for TPS23757 (Rev. B) 2010年 8月 30日
應(yīng)用手冊 Using the TPS23753A with an External Error Amplifier 2010年 8月 6日
應(yīng)用手冊 Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) 2009年 2月 9日
應(yīng)用手冊 PoE Powered Device for 24 VAC Building Power Applications 2008年 9月 10日
應(yīng)用手冊 Designing an EMI Compliant PoE with Isolated Flyback 2008年 5月 20日
應(yīng)用手冊 Practical Guidelines EMI Compliant PoE 2008年 3月 27日

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評估板

TPS23757EVM — TPS23757 22-57V 輸出電壓、5V 輸出電壓高效 PoE 接口和 DC/DC 控制器評估模塊

TPS23757EVM 包含 TPS23757 的評估和參考電路。TPS23757 包含有源器件 (PD) 和電源控制器,支持多種高效拓?fù)?。TPS23757EVM 支持 1 類 PD 的 IEEE 802.3at 標(biāo)準(zhǔn)(草案)(相當(dāng)于 IEEE 802.3-2008 的 13W 標(biāo)準(zhǔn)),并且包含針對高效轉(zhuǎn)換器拓?fù)溥M(jìn)行優(yōu)化的電源控制器。TPS23757EVM 面向 11W 同步反向轉(zhuǎn)換器應(yīng)用。

用戶指南: PDF
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支持的產(chǎn)品和硬件

支持的產(chǎn)品和硬件

產(chǎn)品
供電設(shè)備
TPS2375 具有閂鎖保護(hù)的 3 級 PoE PD TPS23750 具有反激式直流/直流控制器的 3 級 PoE PD TPS23751 具有反激式直流/直流控制器的 IEEE 802.3at PoE 接口 TPS23752 具有反激式直流/直流控制器和睡眠模式特性的 IEEE 802.3at PoE 接口 TPS23753 IEEE 802.3-2005 PoE 接口和隔離式轉(zhuǎn)換控制器 TPS23753A 具有增強(qiáng)型 ESD 穿越功能的 IEEE 802.3-2005 PoE 接口和隔離轉(zhuǎn)換器控制器 TPS23754 符合 IEEE 802.3at 標(biāo)準(zhǔn)的高效 PoE 接口和直流/直流控制器 TPS23754-1 IEEE 802.3at PoE 接口和隔離轉(zhuǎn)換器控制器 TPS23756 具有反激式/正激式直流/直流控制器和 12V 至 57V 適配器支持的 4 級 PoE PD TPS23757 具有反激式/正激式直流/直流控制器和 12V 至 57V 適配器支持的 3 級 PoE PD TPS2376 具有可調(diào)節(jié) UVLO 閾值和閂鎖保護(hù)的 3 級 PoE PD TPS2377 具有傳統(tǒng) UVLO 閾值和閂鎖保護(hù)的 3 級 PoE PD TPS2378 具有 AUX 控制功能的 IEEE 802.3at PoE 高功率 PD 接口 TPS23785B 高功率、高效 PoE 受電設(shè)備 (PD) 和 DC 至 DC 控制器 TPS2379 具有外部柵極驅(qū)動器的 IEEE 802.3at PoE 高功率 PD 接口
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