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Product details

Parameters

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 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

Features

  • 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.

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Description

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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Similar but not functionally equivalent to the compared device:
TPS23755 ACTIVE IEEE 802.3at PoE PD with no-opto flyback DC-DC controller This product utilizes a primary side regulated diode rectified flyback topology and integrates the switching FET.
TPS23758 ACTIVE IEEE 802.3at PoE PD with no-opto sync flyback DC-DC controller This product utilizes a primary side regulated synchronous rectified flyback topology and integrates the switching FET.

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 13
Type Title Date
* Datasheet Integrated 100-V IEEE 802.3af PD and DC/DC Controller datasheet (Rev. B) Feb. 07, 2008
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application notes Lightning Surge Considerations for PoE Powered Devices Apr. 30, 2015
More literature Исходные проекты ll May 13, 2011
User guides TPS23750 Flyback-Converter Evaluation Board - HPA108. (Rev. D) Mar. 31, 2011
User guides TPS23750 Buck-Converter Evaluation Board - HPA107 (Rev. A) Jan. 03, 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
Application notes Practical Guidelines EMI Compliant PoE Mar. 27, 2008
More literature TPS23750PWP Test Report Feb. 19, 2008
User guides TPS23750 High Efficiency 5V at 2.2A PoE PD Reference Design Mar. 07, 2006
User guides TPS23750 PMP1360 12V at 1A PoE PD Reference Design Mar. 07, 2006
Application notes Wall Adapter Powers IEEE 802.3af Powered Device Feb. 01, 2006

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
49
Description

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.

Features
  • Complete evaluation module from RJ-45 conector to reguated output voltage.
EVALUATION BOARDS Download
document-generic User guide
49
Description

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.

Features
  • Complete evaluation module from RJ-45 conector to reguated 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)
BILL OF MATERIALS (BOM) Download
SLUR023.PDF (28 KB)
SCHEMATICS Download
SLUR024.PDF (93 KB)

Reference designs

REFERENCE DESIGNS Download
Class 3,Cost and Efficiency Optimized Buck Converter for PoE Applications Reference Design
PMP4679 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.

document-generic Schematic document-generic User guide
Design files
REFERENCE DESIGNS Download
Class 1- Positive Referenced PoE Buck
PMP5592 — 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.
Design files

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 20 View options

Ordering & quality

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