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

TPS23756

ACTIVO

PD de PoE de clase 4 con controlador CC-CC de retorno/avance y compatibilidad con adaptador de 12 V-

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TPS23756

ACTIVO
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Detalles del producto

Vin (min) (V) 9.3 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) 9.3 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
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
Application note Using the TPS23753A with an External Error Amplifier 06 ago 2010
EVM User's guide TPS23756EVM User's Guide (Rev. A) 01 abr 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

TPS23756EVM — TPS23756EVM: Módulo de evaluación para TPS23756

The TPS23756EVM contains evaluation and reference circuitry for the TPS23756, which is a Class 4 (25.5 W) PoE PD + PWM Controller. The TPS23756 is targeted at wide Vin aplications (12 V - 60 V) in isolated converter topologies and is compliant with the IEEE 802.3 at Power over Ethernet (PoE) (...)

Guía del usuario: PDF
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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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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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Diseños de referencia

PMP40514 — Diseño de referencia de convertidor de retorno aislado de abrazadera activa de Clase 3 y alta eficie

This reference design is developed for evaluating 13-W isolated active clamp flyback PD converter system using the IEEE 802.3at PoE interface and DC/DC controller TPS23756. The converter is capable of supporting the 13-W maximum IEEE 802.3at power requirements. It presents good efficiency, load (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

TIDA-00091 — Clase 4 - Convertidor de alimentación a través de Ethernet (PoE) de rango de entrada amplio de 15 W

Note: TIDA-00091 was implemented using hardware from PMP6659.

The Class 4 – Wide Input Range, 15W Power over Ethernet (PoE) Converter reference design is intended as an evaluation module for users to develop end-products for IP security camera applications.  This reference design has been (...)

Design guide: PDF
Esquema: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
HTSSOP (PWP) 20 Ultra Librarian
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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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