Product details

Vin (Min) (V) 0 Vin (Max) (V) 67 PoE current limit (Min) (mA) 405 PoE inrush limit (Typ) (mA) 140 rDS(on) per FET (Typ) (mOhms) 600 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 Error Amplifier, Thermal Shutdown Switching frequency Programmable
Vin (Min) (V) 0 Vin (Max) (V) 67 PoE current limit (Min) (mA) 405 PoE inrush limit (Typ) (mA) 140 rDS(on) per FET (Typ) (mOhms) 600 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 Error Amplifier, Thermal Shutdown Switching frequency Programmable
HTSSOP (PWP) 20 42 mm² 6.5 x 6.4
  • Complete 802.3af PoE Interface
    • Features derived from the TPS2375
    • 100 V, 0.6 Internal Pass MOSFET
    • Standard and Legacy UVLO Choices
    • Fixed 140 mA Inrush Limit
  • Primary Side DC/DC Converter Control
    • Minimum External Component Count
    • Current Mode Control
    • Isolated and Non-Isolated Topologies
    • Programmable Operating Frequency
    • Current Sense Leading-edge Blanking
    • 50% Duty Cycle Limiting
    • Voltage Output Error Amplifier
  • Internal PoE and Converter Sequencing
  • Industry-Standard 20 Lead Package
  • Industrial Temperature Range, -40°C to 85°C
  • APPLICATIONS
    • All PoE PD Devices Including:
      • Wireless Access Points
      • VoIP Phones
      • Security Cameras

PowerPAD is a trademark of Texas Instruments.

  • Complete 802.3af PoE Interface
    • Features derived from the TPS2375
    • 100 V, 0.6 Internal Pass MOSFET
    • Standard and Legacy UVLO Choices
    • Fixed 140 mA Inrush Limit
  • Primary Side DC/DC Converter Control
    • Minimum External Component Count
    • Current Mode Control
    • Isolated and Non-Isolated Topologies
    • Programmable Operating Frequency
    • Current Sense Leading-edge Blanking
    • 50% Duty Cycle Limiting
    • Voltage Output Error Amplifier
  • Internal PoE and Converter Sequencing
  • Industry-Standard 20 Lead Package
  • Industrial Temperature Range, -40°C to 85°C
  • APPLICATIONS
    • All PoE PD Devices Including:
      • Wireless Access Points
      • VoIP Phones
      • Security Cameras

PowerPAD is a trademark of Texas Instruments.

The TPS23750 integrates the functionality of the TPS2375 with a primary side dc/dc PWM controller. The designer can create a front-end solution for PoE-PD applications with minimum external components. The TPS23770 is identical to the TPS23750 with the exception of the undervoltage lockout turn-on voltage, which is compatible with legacy systems.

The PoE front end has all the necessary IEEE 802.3af functions including detection, classification, undervoltage lockout and inrush control. The PoE input switch is integrated within the TPS23750.

The dc/dc controller section is designed to support flyback, forward, and nonsynchronous low-side switch buck topologies.

The external switching MOSFET and current sense resistor provide flexibility in topology, power level, and current limit. The full-featured dc/dc controller includes programmable soft start, hiccup type fault limiting, 50% maximum duty cycle, programmable constant switching frequency, and a true voltage-output error amplifier. Additional protection features provide for robust designs.

The TPS23750 integrates the functionality of the TPS2375 with a primary side dc/dc PWM controller. The designer can create a front-end solution for PoE-PD applications with minimum external components. The TPS23770 is identical to the TPS23750 with the exception of the undervoltage lockout turn-on voltage, which is compatible with legacy systems.

The PoE front end has all the necessary IEEE 802.3af functions including detection, classification, undervoltage lockout and inrush control. The PoE input switch is integrated within the TPS23750.

The dc/dc controller section is designed to support flyback, forward, and nonsynchronous low-side switch buck topologies.

The external switching MOSFET and current sense resistor provide flexibility in topology, power level, and current limit. The full-featured dc/dc controller includes programmable soft start, hiccup type fault limiting, 50% maximum duty cycle, programmable constant switching frequency, and a true voltage-output error amplifier. Additional protection features provide for robust designs.

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Technical documentation

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Type Title Date
* Data sheet Integrated 100-V IEEE 802.3af PD and DC/DC Controller datasheet (Rev. B) 07 Feb 2008
Application note PoE Powered Devices Debug Guidelines 19 Jul 2021
Application note PoE PD Schematic Review Guidelines 29 Apr 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Lightning Surge Considerations for PoE Powered Devices 30 Apr 2015
More literature Исходные проекты ll 13 May 2011
User guide TPS23750 Flyback-Converter Evaluation Board - HPA108. (Rev. D) 31 Mar 2011
User guide TPS23750 Buck-Converter Evaluation Board - HPA107 (Rev. A) 03 Jan 2011
Application note Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) 09 Feb 2009
Application note Designing an EMI Compliant PoE with Isolated Flyback 20 May 2008
Application note Practical Guidelines EMI Compliant PoE 27 Mar 2008
More literature TPS23750PWP Test Report 19 Feb 2008
User guide TPS23750 High Efficiency 5V at 2.2A PoE PD Reference Design 07 Mar 2006
User guide TPS23750 PMP1360 12V at 1A PoE PD Reference Design 07 Mar 2006
Application note Wall Adapter Powers IEEE 802.3af Powered Device 01 Feb 2006

Design & development

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

Evaluation board

TPS23750EVM-107 — TPS23750 Evaluation Module Buck

The TPS23750EVM-107 evaluation module implements an IEEE 802.3af-compliant class-3 power interface and a non-isolated DC/DC switching converter using the Texas Instruments TPS23750 powered device (PD) controller in a typical power-over-Ethernet (PoE) configuration.

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Evaluation board

TPS23750EVM-108 — TPS23750 Evaluation Module Flyback

The TPS23750EVM-108 evaluation module implements an IEEE 802.3af-compliant class-3 power interface and a DC/DC switching converter using the Texas Instruments TPS23750 powered device (PD) controller in a typical power-over-Ethernet (PoE) configuration.

Out of stock on TI.com
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Calculation tool

PoE PD Efficiency Calculator

SLUC480.ZIP (452 KB)
Schematic

TPS23750PWP Schematic

SLUR024.PDF (93 KB)
Bill of materials (BOM)

TPS23750PWP Bill of Materials

SLUR023.PDF (28 KB)
Reference designs

PMP4679 — Class 3,Cost and Efficiency Optimized Buck Converter for PoE Applications Reference Design

This reference evaluation module, featuring the TPS23750 PoE DC-to-DC controller, is used for class 3 PoE applications where low-cost and high efficiency are required.

The module accepts input voltages between 37-57V ac and output 12V at 0.95A.

Reference designs

PMP5592 — Class 1- Positive Referenced PoE Buck

Low-Cost Non-Isolated converter with 3.3V at 0.6A output for class 1 POE Applications. PMP5592 accepts input voltages between 36-57Vac. This design uses TPS23750 IEEE 802.3af PD Controller with Integrated DC/DC controller.
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HTSSOP (PWP) 20 View options

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