Product details

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
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
TSSOP (PW) 14 32 mm² 5 x 6.4
  • 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
  • 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

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.

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

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Type Title Date
* Data sheet TPS23753A IEEE 802.3 PoE Interface and Converter Controller with Enhanced ESD Immunity datasheet (Rev. D) PDF | HTML 10 Dec 2020
Application note PoE Powered Devices Debug Guidelines PDF | HTML 19 Jul 2021
Application note PoE PD Schematic Review Guidelines PDF | HTML 29 Apr 2021
Technical article How to reduce the size of your 13-W PoE PD solution 25 Jun 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Flyback converters: two outputs are better than one 24 Nov 2016
User guide TPS23753AEVM-004: Evaluation Module for TPS23753A.. (Rev. F) 07 Mar 2016
Application note Lightning Surge Considerations for PoE Powered Devices 30 Apr 2015
EVM User's guide TPS23753AEVM-235 Evaluation Module (Rev. A) 28 Mar 2014
User guide TPS23753AEVM-001 Evaluation Module for TPS23753A (Rev. A) 27 Mar 2014
Application note Designing with the TPS23753 Powered Device and Power Supply Controller (Rev. C) 10 Jan 2013
Application note Implementing a Buck Converter With the TPS23753A 20 Sep 2010
Application note Using the TPS23753A with an External Error Amplifier 06 Aug 2010
Application note Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) 09 Feb 2009
Application note PoE Powered Device for 24 VAC Building Power Applications 10 Sep 2008
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

TPS23753AEVM-001 — 5Vout, 7W, IEEE 802.3-2005 Compliant, PD Controller, PS Controller EVM for TPS23753AEVM-001

The TPS23753AEVM-001 contains evaluation and reference circuitry for the TPS23753A, which is a Class 3 PoE PD + PWM Controller. It contains input and output power connectors and an array of onboard test points for circuit evaluation. The TPS23753AEVM-002 (3.3-V output) can be configured with simple (...)

User guide: PDF
Not available on TI.com
Evaluation board

TPS23753AEVM-004 — TPS23753AEVM-004 3.3Vout 10W IEEE 802.3-2005 Compliant PD Contr, PS Contr Evaluation Module

TPS23753AEVM-004 contains evaluation and reference circuitry for the TPS23753A, which is a Class 3 PoE PD + PWM Controller. It contains input and output power connectors and an array of onboard test points for circuit evaluation. The TPS23753AEVM-003 (5-V output) and TPS23753AEVM-005 (12-V output) (...)

User guide: PDF
Not available on TI.com
Calculation tool

PoE PD Efficiency Calculator

SLUC480.ZIP (452 KB)
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 (...)
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TSSOP (PW) 14 View options

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