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Product details

Parameters

Vin (Min) (V) 9.2 Vin (Max) (V) 57 PoE current limit (Min) (mA) 850 PoE inrush limit (Typ) (mA) 140 rDS(on) per FET (Typ) (mOhms) 450 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, Thermal Shutdown, VFO Switching frequency Programmable open-in-new Find other Powered devices

Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 open-in-new Find other Powered devices

Features

  • IEEE 802.3at Classification With Status Flag
  • High Efficiency Solutions Over Wide Load Range
  • Powers Up to 25.5 W PDs
  • Robust 100 V, 0.5 Ω Hotswap MOSFET
  • Synchronous Rectifier Disable Signal
  • PowerPAD™ TSSOP Packages
  • Complete PoE Interface Plus DC-DC Controller
  • Adapter ORing Support
  • Programmable Frequency
  • TPS23752 Supports Ultra-Low Power Sleep Modes
  • –40°C to 125°C Junction Temperature Range

All trademarks are the property of their respective owners.

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Description

The TPS23751 is a 16-pin integrated circuit that combines a Power-over-Ethernet (PoE) powered device (PD) interface and a current-mode DC-DC controller optimized specifically for applications requiring high efficiency over a wide load range.

The PoE interface implements type-2 hardware classification per IEEE 802.3at. It also includes an auxiliary power detect (APD) input and a disable function (DEN). A 0.5-Ω, 100-V pass MOSFET minimizes heat dissipation and maximizes power utilization.

The DC-DC controller features internal soft-start, a bootstrap startup current source, current-mode control with slope compensation, blanking, and current limiting. Efficiency is enhanced at light loads by disabling synchronous rectification and entering variable frequency operation (VFO).

The TPS23752 is a 20-pin extended version of the TPS23751 with the addition of a Sleep Mode feature. Sleep Mode disables the converter to minimize power consumption while still generating the Maintain Power Signature (MPS) required by IEEE802.3at.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 9
Type Title Date
* Datasheet TPS2375x IEEE 802.3at PoE Interface With Flyback DC-DC Controller datasheet (Rev. E) Jan. 26, 2018
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles Maximizing PoE PD efficiency on a budget Nov. 10, 2015
Application notes Lightning Surge Considerations for PoE Powered Devices Apr. 30, 2015
User guides TPS23751EVM-104 EVM: Evaluation Module for TPS23751 (Rev. A) Nov. 02, 2012
Technical articles Watch your Power over Ethernet OPEX or risk obsolescence! Oct. 09, 2012
Application notes High Efficiency Class 4 PoE Powered Device Mar. 23, 2011
Application notes Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) Feb. 09, 2009
Application notes Designing an EMI Compliant PoE with Isolated Flyback May 20, 2008

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
TPS23751 Evaluation Module
TPS23751EVM-104
document-generic User guide
49
Description
The Texas Instruments TPS23751EVM-104 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS23751 Power over Ethernet powered device and DC/DC controller. The EVM contains input and output connectors as well as control jumpers to ease evaluation of device features.
Features
  • Powers up to 25.5 W PDs
  • Robust 100 V, 0.5 ohm hotswap MOSFET
  • High efficiency and Eco-mode™
  • Synchronous rectifier disable signal
  • PowerPad™ TSSOP packages
  • IEEE 802.3at classification with status flag
  • Complete PoE interface plus DC/DC controller
  • Adapter ORing support
  • Programmable frequency
EVALUATION BOARDS Download
TPS23752 Evaluation Module
TPS23752EVM-145
document-generic User guide
49
Description
The Texas Instruments TPS23752EVM-145 evaluation module (EVM) helps designers evaluate the performance of the TPS23752 IEEE 802.3at PoE Interface and Green-mode DC/DC Controller. The EVM contains input and output connectors as well as control jumpers to ease evaluation of device features.
Features
  • Ethernet Alliance certified for receiving Class 4 power
  • Power over Ethernet (PoE) powered device and DC/DC controller with ECO mode technology and sleep mode
  • Powers up to 25.5 W PDs
  • Robust 100 V, 0.5 ohm hotswap MOSFET
  • High efficiency and Eco-mode
  • Synchronous rectifier disable signal
  • PowerPadTM TSSOP (...)
EVALUATION BOARDS Download
document-generic User guide
49
Description

TPS23754EVM-383 will allow reference circuitry evaluation of the TPS23754. It contains input and output power connectors and an array of on board test points for circuit evaluation. A synchronous flyback, 5 V, 25 W EVM is also available.

Features
  • Ethernet Alliance certified for receiving Class 4 power
  • Efficient, general market design
  • Self driven, synchronous rectified secondary
  • 25 w output power from power over ethernet (POE), 30W output power from a 48 V adapter
  • Operates from either POE or external adaptors (48 V)
  • 12 V output voltage

Design tools & simulation

SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOLS Download
SLUC480.ZIP (452 KB)

Reference designs

REFERENCE DESIGNS Download
Class 4 high efficiency PoE flyback-synchronous converter (5V/3A) reference design
PMP20220 — This reference design utilizes the TPS23751 combination PoE PD controller and PWM controller, saving cost and size.  The synchronous flyback converter provides high efficiency for PoE applications such as wireless access points and IP phones.  The PoE PD can also supply up to 10W of (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Class 4 PoE Flyback Converter (12V@2.125A) Reference Design
PMP11254 — The flyback topology with diode rectification provides a low cost solution for Class 4 PoE applications.  The TPS23751 is a combination PoE PD controller and PWM controller, saving cost and space.  This converter is well suited for PoE applications such as security cameras and wireless access points.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Class 4 High-Efficiency Driven Flyback Converter (5V/5A) for PoE PD Applications Reference Design
TIDA-00617 The TIDA-00617 reference design uses the TPS23751 PoE PD controller in a high effciency (driven) synch flyback converter capable of 5V at 5A.
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 16 View options

Ordering & quality

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