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Product details

Parameters

Vin (Min) (V) 9.3 Vin (Max) (V) 57 PoE current limit (Min) (mA) 405 PoE inrush limit (Typ) (mA) 140 rDS(on) per FET (Typ) (mOhms) 700 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 Primary Side Adapter Priority, Thermal Shutdown Switching frequency Programmable, Synchronizable open-in-new Find other Powered devices

Package | Pins | Size

TSSOP (PW) 14 32 mm² 5 x 6.4 open-in-new Find other Powered devices

Features

  • Enhanced ESD Ride-Through Capability
  • Optimized for Isolated Converters
  • Complete PoE Interface
  • Adapter ORing Support
  • 12-V Adapter Support
  • Programmable Frequency With Synchronization
  • Robust 100-V, 0.7-Ω Hotswap MOSFET
  • Small 14-Pin TSSOP Package
  • 15-kV and 8-kV System Level ESD Capable
  • –40°C to 125°C Junction Temperature Range
  • Design Procedure Application Note – SLVA305
  • Adapter ORing Application Note – SLVA306
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Description

The TPS23753A is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode DC-DC controller optimized specifically for isolated converter designs. The PoE implementation supports the IEEE 802.3at standard as a 13-W, type 1 PD. The requirements for an IEEE 802.3at type 1 device are a superset of IEEE 802.3-2008 (originally IEEE 802.3af).

The TPS23753A supports a number of input-voltage ORing options including highest voltage, external adapter preference, and PoE preference.

The PoE interface features an external detection signature pin that can also be used to disable the internal hotswap MOSFET. This allows the PoE function to be turned off. Classification can be programmed to any of the defined types with a single resistor.

The DC-DC controller features a bootstrap start-up mechanism with an internal, switched current source. This provides the advantages of cycling overload fault protection without the constant power loss of a pullup resistor.

The programmable oscillator may be synchronized to a higher-frequency external timing reference. The TPS23753A features improvements for uninterrupted device operation through an ESD event.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TPS23753A IEEE 802.3 PoE Interface and Converter Controller With Enhanced ESD Immunity datasheet (Rev. C) Jan. 25, 2016
Technical articles How to reduce the size of your 13-W PoE PD solution Jun. 25, 2019
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles Flyback converters: two outputs are better than one Nov. 24, 2016
User guides TPS23753AEVM-004: Evaluation Module for TPS23753A.. (Rev. F) Mar. 07, 2016
Application notes Lightning Surge Considerations for PoE Powered Devices Apr. 30, 2015
User guides TPS23753AEVM-235 Evaluation Module (Rev. A) Mar. 28, 2014
User guides TPS23753AEVM-001 Evaluation Module for TPS23753A (Rev. A) Mar. 27, 2014
Application notes Designing with the TPS23753 Powered Device and Power Supply Controller (Rev. C) Jan. 10, 2013
Application notes Implementing a Buck Converter With the TPS23753A Sep. 20, 2010
Application notes Using the TPS23753A with an External Error Amplifier Aug. 06, 2010
Application notes Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) Feb. 09, 2009
Application notes PoE Powered Device for 24 VAC Building Power Applications Sep. 10, 2008
Application notes Designing an EMI Compliant PoE with Isolated Flyback May 20, 2008
Application notes Practical Guidelines EMI Compliant PoE Mar. 27, 2008

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 TPS23753AEVM-001 allows reference circuitry evaluation of the TPS23753A. It contains input and output power connectors and an array of onboard test points for circuit evaluation. TPS23753AEVM-002 (3.3-V output) can be configured with simple bill of materials (BOM) changes.

Features
  • Ethernet Alliance certified for receiving Class 3 power (optimized for 7W)
  • Low-cost, basic design
  • Simple gate drive, Shottky diode rectified secondary
  • 7-W output power from power over ethernet (PoE), 48-V or 24-V adapter and 4-W output power from a 12-V adapter
  • 3.3-V output voltage with simple BOM (...)
EVALUATION BOARDS Download
document-generic User guide
49
Description

TPS23753AEVM-004 allows users to evaluate the reference circuitry of the TPS23753A. It contains input and output power connectors and an array of onboard test points for circuit evaluation. TPS23753AEVM-003 (5-V output) and TPS23753AEVM-005 (12-V output) can be configured with simple bill of (...)

Features
  • Efficient, general market design
  • Simple gate drive, synchronous rectified secondary
  • 10-W output power from power over Ethernet (PoE), 48-V or 24-V adapter and 6-W output power from a 12-V adapter
  • 5-V or 12-V output voltage with simple BOM changes

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)

Reference designs

Many TI reference designs include the TPS23753A Use our reference design selection tool to review and identify designs that best match your application and parameters.

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 14 View options

Ordering & quality

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