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TPS23750

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Class 3 PoE PD with flyback DC-DC controller

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Data sheet

TPS23750

ACTIVE
Data sheet Order now

Product details

PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Vin (max) (V) 67 Vin (min) (V) 0 PoE current limit (min) (mA) 405 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 600 Features Error amplifier, Thermal shutdown Fault response Auto Retry Operating temperature range (°C) -40 to 85 Rating Catalog
PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Vin (max) (V) 67 Vin (min) (V) 0 PoE current limit (min) (mA) 405 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 600 Features Error amplifier, Thermal shutdown Fault response Auto Retry Operating temperature range (°C) -40 to 85 Rating Catalog
HTSSOP (PWP) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • 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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Top documentation Type Title Format options Date
* Data sheet Integrated 100-V IEEE 802.3af PD and DC/DC Controller datasheet (Rev. B) Feb 7, 2008
Application note PoE Powered Devices Debug Guidelines PDF | HTML Jul 19, 2021
Application note PoE PD Schematic Review Guidelines PDF | HTML Apr 29, 2021
Selection guide Power Management Guide 2018 (Rev. R) Jun 25, 2018
Application note Lightning Surge Considerations for PoE Powered Devices Apr 30, 2015
EVM User's guide TPS23750 Flyback-Converter Evaluation Board - HPA108. (Rev. D) Mar 31, 2011
Application note Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) Feb 9, 2009
Application note Designing an EMI Compliant PoE with Isolated Flyback May 20, 2008
Application note Practical Guidelines EMI Compliant PoE Mar 27, 2008
More literature TPS23750PWP Test Report Feb 19, 2008
User guide TPS23750 High Efficiency 5V at 2.2A PoE PD Reference Design Mar 7, 2006
User guide TPS23750 PMP1360 12V at 1A PoE PD Reference Design Mar 7, 2006
Application note Wall Adapter Powers IEEE 802.3af Powered Device Feb 1, 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.

User guide: PDF
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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.

User guide: PDF
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Calculation tool

SLUC480 — PoE PD Efficiency Calculator

Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
HTSSOP (PWP) 20 Ultra Librarian
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