Product details

Vin (Min) (V) 0 Vin (Max) (V) 57 PoE current limit (Min) (mA) 850 PoE inrush limit (Typ) (mA) 140 rDS(on) per FET (Typ) (mOhms) 420 PoE standards supported 802.3at Type 1 (802.3af), 802.3at Type 2, Non Standard PD power level 13W, 25W, >25W DC/DC control PD Only Fault response Auto Retry Features Thermal Shutdown
Vin (Min) (V) 0 Vin (Max) (V) 57 PoE current limit (Min) (mA) 850 PoE inrush limit (Typ) (mA) 140 rDS(on) per FET (Typ) (mOhms) 420 PoE standards supported 802.3at Type 1 (802.3af), 802.3at Type 2, Non Standard PD power level 13W, 25W, >25W DC/DC control PD Only Fault response Auto Retry Features Thermal Shutdown
HSOIC (DDA) 8 19 mm² 4.9 x 3.9
  • IEEE 802.3at Type-2 Hardware Classification With
    Status Flag
  • Auxiliary Gate Driver for High-Power Expansion
  • Robust 100-V, 0.5-Ω Hotswap MOSFET
  • 1A (Typical) Operating Current Limit
  • 140 mA (Typical) Inrush Current Limit
  • DC-DC Converter Enable
  • 15 kV/8 kV System-level ESD Capability
  • PowerPAD™ HSOP Package
  • IEEE 802.3at Type-2 Hardware Classification With
    Status Flag
  • Auxiliary Gate Driver for High-Power Expansion
  • Robust 100-V, 0.5-Ω Hotswap MOSFET
  • 1A (Typical) Operating Current Limit
  • 140 mA (Typical) Inrush Current Limit
  • DC-DC Converter Enable
  • 15 kV/8 kV System-level ESD Capability
  • PowerPAD™ HSOP Package

The TPS2379 device is an 8-pin integrated circuit that contains all of the features needed to implement an IEEE802.3at type-2 powered device (PD) such as Detection, Classification, Type 2 Hardware Classification, and 140-mA inrush current limit during startup. The low 0.5-Ω internal switch resistance, combined with the enhanced thermal dissipation of the PowerPAD package, enables this controller to continuously handle up to 0.85 A. The TPS2379 integrates a low 0.5-Ω internal switch to allow for up to 0.85 A of continuous current through the PD during normal operation. The TPS2379 device supports higher-power applications through an external pass transistor. The TPS2379 contains several protection features such as thermal shutdown, current limit foldback, and a robust 100-V internal switch.

The TPS2379 device is an 8-pin integrated circuit that contains all of the features needed to implement an IEEE802.3at type-2 powered device (PD) such as Detection, Classification, Type 2 Hardware Classification, and 140-mA inrush current limit during startup. The low 0.5-Ω internal switch resistance, combined with the enhanced thermal dissipation of the PowerPAD package, enables this controller to continuously handle up to 0.85 A. The TPS2379 integrates a low 0.5-Ω internal switch to allow for up to 0.85 A of continuous current through the PD during normal operation. The TPS2379 device supports higher-power applications through an external pass transistor. The TPS2379 contains several protection features such as thermal shutdown, current limit foldback, and a robust 100-V internal switch.

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TPS2373 ACTIVE IEEE 802.3bt PoE high-power PD interface with advanced startup This product is fully compliant to the IEEE 802.3bt standard.

Technical documentation

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Type Title Date
* Data sheet TPS2379 IEEE 802.3at PoE High-Power PD Interface With External Gate Driver datasheet (Rev. A) 28 Jul 2015
Application note PoE Powered Devices Debug Guidelines 19 Jul 2021
Application note PoE PD Schematic Review Guidelines 29 Apr 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Lightning Surge Considerations for PoE Powered Devices 30 Apr 2015
User guide TPS2379EVM-106 Evaluation Module (Rev. A) 05 May 2014
Technical article SLEIGH secrets revealed! 24 Dec 2013
Technical article Watch your Power over Ethernet OPEX or risk obsolescence! 09 Oct 2012

Design & development

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

Evaluation board

TPS2379EVM-106 — TPS2379 Evaluation Module

The Texas Instruments TPS2379EVM-106 evaluation module is a fully assembled and tested circuit for evaluating the TPS2379 IEEE 802.3at PoE High-Power PD Interface with External Gate Driver.


In need of IEEE802.3bt compliance? Check out the TPS2373

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Simulation model

TPS2379 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM996A.ZIP (30 KB) - PSpice Model
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 (...)
Calculation tool

PoE PD Efficiency Calculator

SLUC480.ZIP (452 KB)
Reference designs

PMP8923 — Non-Standard PoE (>25.5W) - High Efficiency Forward Converter (5V@10A) Reference Design

This converter provides a high power PoE output of 5V/10A. The TPS2379 PD controller allows the use of an external hot swap FET for increased efficiency. The UCC2897A PWM controller is used to implement a high efficiency active clamp forward converter.
Reference designs

PMP7499 — Non-Standard (>25.5W) PoE - High Efficiency Forward Converter (12V@5A) Reference Design

This converter provides a high power PoE output of 12V/5A. The TPS2379 PD controller allows the use of an external hot swap FET for increased efficiency. The UCC2897A PWM controller is used to implement a high efficiency active clamp forward converter.
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SO PowerPAD (DDA) 8 View options

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