Inicio Gestión de la energía Circuitos integrados de alimentación a través de Ethernet (PoE) Dispositivos alimentados

TPS23757

ACTIVO

PD de PoE de clase 3 con controlador CC-CC de retorno/avance y compatibilidad con adaptador de 12 V-

Detalles del producto

Vin (min) (V) 9.3 Vin (max) (V) 57 PoE current limit (min) (mA) 400 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 430 PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Fault response Auto Retry Features Primary-side adapter priority, Second Gate Drive, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog
Vin (min) (V) 9.3 Vin (max) (V) 57 PoE current limit (min) (mA) 400 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 430 PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Fault response Auto Retry Features Primary-side adapter priority, Second Gate Drive, Thermal shutdown 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 Ω 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 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.

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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Documentación técnica

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Tipo Título Fecha
* Data sheet High Efficiency PoE Interface and DC/DC Controller datasheet (Rev. D) 20 nov 2013
Application note PoE Powered Devices Debug Guidelines PDF | HTML 19 jul 2021
Application note PoE PD Schematic Review Guidelines PDF | HTML 29 abr 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
Application note Lightning Surge Considerations for PoE Powered Devices 30 abr 2015
Application note Implementing a Buck Converter With the TPS23753A 20 sep 2010
User guide TPS23757EVM: Evaluation Module for TPS23757 (Rev. B) 30 ago 2010
Application note Using the TPS23753A with an External Error Amplifier 06 ago 2010
Application note Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) 09 feb 2009
Application note PoE Powered Device for 24 VAC Building Power Applications 10 sep 2008
Application note Designing an EMI Compliant PoE with Isolated Flyback 20 may 2008
Application note Practical Guidelines EMI Compliant PoE 27 mar 2008

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

TPS23757EVM — Interfaz de PoE con entrada de 22-57 V y salida de 5 V, de alta eficiencia y módulo de evaluación de

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 (...)

Guía del usuario: PDF
Herramienta de cálculo

SLUC480 PoE PD Efficiency Calculator

Productos y hardware compatibles

Productos y hardware compatibles

Productos
Dispositivos alimentados
TPS2375 PD de PoE de clase 3 con protección de cierre TPS23750 PD de PoE de clase 3 con controlador CC-CC de retorno TPS23751 Interfaz de PoE IEEE 802.3at con controlador CC-CC de retorno TPS23752 Interfaz de PoE IEEE 802.3at con controlador CC-CC de retorno y función de modo de suspensión TPS23753 Interfaz de PoE IEEE 802.3-2005 y convertidor y controlador aislado TPS23753A Interfaz de PoE IEEE 802.3-2005 y controlador de convertidor aislado con paso a través de ESD mejora TPS23754 Interfaz de PoE IEEE 802.3at, alta eficiencia y controlador CC/CC TPS23754-1 Interfaz de PoE IEEE 802.3at y controlador convertidor aislado TPS23756 PD de PoE de clase 4 con controlador CC-CC de retorno/avance y compatibilidad con adaptador de 12 V- TPS23757 PD de PoE de clase 3 con controlador CC-CC de retorno/avance y compatibilidad con adaptador de 12 V- TPS2376 PD de PoE de clase 3 con umbral UVLO ajustable y protección de cierre TPS2377 PD de PoE de clase 3 con umbral UVLO heredado y protección de cierre TPS2378 Interfaz PD de alta potencia de PoE IEEE 802.3at con control AUX TPS23785B PD de PoE de alta potencia y alta eficiencia y controlador CC a CC TPS2379 Interfaz PD de alta potencia IEEE 802.3at de PoE con controlador de puerta externo
Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

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 (...)
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TSSOP (PW) 20 Ver opciones

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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