Product details


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, Sleep Mode, Thermal Shutdown, VFO Switching frequency Programmable open-in-new Find other Powered devices

Package | Pins | Size

HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 open-in-new Find other Powered devices


  • 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
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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

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Type Title Date
* Data sheet TPS2375x IEEE 802.3at PoE Interface With Flyback DC-DC Controller datasheet (Rev. E) Jan. 26, 2018
Application note PoE Powered Devices Debug Guidelines Jul. 19, 2021
Application note PoE PD Schematic Review Guidelines Apr. 29, 2021
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical article Maximizing PoE PD efficiency on a budget Nov. 10, 2015
Application note Lightning Surge Considerations for PoE Powered Devices Apr. 30, 2015
Application note TPS23752 Maintain Power Signature Operation in Sleep Mode Apr. 12, 2013
Technical article Watch your Power over Ethernet OPEX or risk obsolescence! Oct. 09, 2012
User guide TPS23752EVM-145 EVM: Evaluation Module for TPS23752 Jul. 28, 2012
Application note High Efficiency Class 4 PoE Powered Device Mar. 23, 2011
Application note Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) Feb. 09, 2009
Application note 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

TPS23752 Evaluation Module
document-generic User guide
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.
  • 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 (...)

Design tools & simulation

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 (...)
  • 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
  • (...)
SLUC480.ZIP (452 KB)

Reference designs

18.5V to 57V Aux-Input to 5.3V, 10W PoE Isolated Sync-Flyback Reference Design
PMP30290 — This compact reference design is a typical PoE application, supplying 10W at 5.3V from Ethernet power. Data filter, external auxiliary input and EMI filter are all on board. The synchronous rectification improves the efficiency, important at only 5.3V output voltage.
document-generic Schematic
Class 4 Synchronous Flyback Converter (5V @ 4.5A) w/Sleep Mode for PoE Reference Design
PMP9013 The PMP9013 is an IEEE802.3at, Type 2 compliant, high-efficiency synchronous flyback converter (5V @4.5A) with sleep mode used for PD design in PoE applications. The reference design has the ability to allow an external adapter to supply power to the board if PoE power is not available.
document-generic Schematic
Class 4- High Efficiency 12V Class 4 PoE Converter Reference Design
PMP8812 — This design is a 12V/2.1A synchronous flyback converter for high efficiency PoE applications. The TPS23752 combines the Powered Device and PWM controllers in one package. Additional features are synchronous rectifier disable for improved light load efficiency and support for ulta low power sleep (...)
Design files

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 20 View options

Ordering & quality

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