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

TPS23754-1

ACTIVO

Interfaz de PoE IEEE 802.3at y controlador convertidor aislado

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TPS23754-1

ACTIVO
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Detalles del producto

Vin (min) (V) 15.7 Vin (max) (V) 57 PoE current limit (min) (mA) 850 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 430 PoE standards supported 802.3at Type 1 (802.3af), 802.3at Type 2 PD power level 13W, 25W 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) 15.7 Vin (max) (V) 57 PoE current limit (min) (mA) 850 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 430 PoE standards supported 802.3at Type 1 (802.3af), 802.3at Type 2 PD power level 13W, 25W 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
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • 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
  • 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.

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.

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Documentación técnica

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* Data sheet TPS2375x IEEE 802.3at, High Efficiency, PoE Interface and DC-DC Controller datasheet (Rev. I) PDF | HTML 19 dic 2017
Application note PoE Powered Devices Debug Guidelines PDF | HTML 19 jul 2021
Application note PoE PD Schematic Review Guidelines PDF | HTML 29 abr 2021
User guide TPS23754EVM-383 EVM: Evaluation Module for TPS23754. (Rev. C) 28 nov 2011
Application note Implementing a Buck Converter With the TPS23753A 20 sep 2010
Application note Using the TPS23753A with an External Error Amplifier 06 ago 2010
User guide TPS23754EVM-420 EVM: Evaluation Module for TPS 17 abr 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

TPS23754EVM-383 — Módulo de evaluación de alta potencia con entrada de 33-57 V, salida de 12 V para TPS23754

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) (...)

Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

TPS23754EVM-420 — Módulo de evaluación de alta potencia con entrada de 20-57 V, salida de 5 V para TPS23754

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) (...)

Guía del usuario: PDF
No disponible en TI.com
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
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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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Pedidos y calidad

Información incluida:
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  • 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
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  • Lugar de fabricación
  • Lugar de ensamblaje

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