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TPS23753A

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IEEE 802.3-2005 PoE interface and Isolated Converter controller with Enhanced ESD Ride-Through

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IEEE 802.3-2005 PoE interface and Isolated Converter controller with Enhanced ESD Ride-Through

TPS23753A

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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

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

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

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 (...)

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 (...)
View details
EVALUATION BOARD Download
document-generic User guide
49
Description

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 (...)

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
View details

Design tools & simulation

SIMULATION TOOL 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
  • (...)
View details
CALCULATION TOOL Download
SLUC480.ZIP (452 KB)

Reference designs

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CAD/CAE symbols

Package Pins Download
TSSOP (PW) 14 View options

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