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TPS23770

ACTIVE

Class 3 PoE PD with flyback integrated DC-DC controller & legacy UVLO threshold

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Data sheet

TPS23770

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 0 Vin (max) (V) 67 PoE current limit (min) (mA) 405 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 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 Operating temperature range (°C) -40 to 85 Rating Catalog
Vin (min) (V) 0 Vin (max) (V) 67 PoE current limit (min) (mA) 405 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 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 Operating temperature range (°C) -40 to 85 Rating Catalog
HTSSOP (PWP) 20 41.6 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 PDF | HTML 19 Jul 2021
Application note PoE PD Schematic Review Guidelines PDF | HTML 29 Apr 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Designing an EMI Compliant PoE with Isolated Flyback 20 May 2008
Application note Practical Guidelines EMI Compliant PoE 27 Mar 2008

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
Not available on TI.com
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
Not available on TI.com
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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 (...)
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