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TPS2377

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Class 3 PoE PD with legacy UVLO threshold & latch protection

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Data sheet

TPS2377

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 0 Vin (max) (V) 57 PoE current limit (min) (mA) 405 PoE inrush limit (mA) (typ) (A) Programmable rDS(on) per FET (typ) (mΩ) 580 PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD Only Fault response Latch Features PG, Programmable UVLO, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Vin (min) (V) 0 Vin (max) (V) 57 PoE current limit (min) (mA) 405 PoE inrush limit (mA) (typ) (A) Programmable rDS(on) per FET (typ) (mΩ) 580 PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD Only Fault response Latch Features PG, Programmable UVLO, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
SOIC (D) 8 29.4 mm² 4.9 x 6 TSSOP (PW) 8 19.2 mm² 3 x 6.4
  • Fully Supports IEEE 802.3af Specification
  • Integrated 0.58-Ω, 100-V, Low-Side Switch
  • 15-kV System Level ESD Capable
  • Supports Use of Low-Cost Silicon Rectifiers
  • Programmable Inrush Current Control
  • Fixed 450-mA Current Limit
  • Fixed and Adjustable UVLO Options
  • Open-Drain, Power-Good Reporting
  • Overtemperature Protection
  • Industrial Temperature Range: –40°C to 85°C
  • 8-Pin SOIC and TSSOP Packages
  • APPLICATIONS
    • VoIP Phones
    • WLAN Access Points
    • Security Cameras
    • Internet Appliances
    • POS Terminals
  • Fully Supports IEEE 802.3af Specification
  • Integrated 0.58-Ω, 100-V, Low-Side Switch
  • 15-kV System Level ESD Capable
  • Supports Use of Low-Cost Silicon Rectifiers
  • Programmable Inrush Current Control
  • Fixed 450-mA Current Limit
  • Fixed and Adjustable UVLO Options
  • Open-Drain, Power-Good Reporting
  • Overtemperature Protection
  • Industrial Temperature Range: –40°C to 85°C
  • 8-Pin SOIC and TSSOP Packages
  • APPLICATIONS
    • VoIP Phones
    • WLAN Access Points
    • Security Cameras
    • Internet Appliances
    • POS Terminals

These easy-to-use 8-pin integrated circuits contain all of the features needed to develop an IEEE 802.3af compliant powered device (PD). The TPS2375 family is a second generation PDC (PD Controller) featuring 100-V ratings and a true open-drain, power-good function.

In addition to the basic functions of detection, classification and undervoltage lockout (UVLO), these controllers include an adjustable inrush limiting feature. The TPS2375 has 802.3af compliant UVLO limits, the TPS2377 has legacy UVLO limits, and the TPS2376 has a programmable UVLO with a dedicated input pin.

The TPS2375 family specifications incorporate a voltage offset of 1.5 V between its limits and the IEEE 802.3af specifications to accommodate the required input diode bridges used to make the PD polarity insensitive.

Additional resources can be found on the TI Web site www.ti.com.

These easy-to-use 8-pin integrated circuits contain all of the features needed to develop an IEEE 802.3af compliant powered device (PD). The TPS2375 family is a second generation PDC (PD Controller) featuring 100-V ratings and a true open-drain, power-good function.

In addition to the basic functions of detection, classification and undervoltage lockout (UVLO), these controllers include an adjustable inrush limiting feature. The TPS2375 has 802.3af compliant UVLO limits, the TPS2377 has legacy UVLO limits, and the TPS2376 has a programmable UVLO with a dedicated input pin.

The TPS2375 family specifications incorporate a voltage offset of 1.5 V between its limits and the IEEE 802.3af specifications to accommodate the required input diode bridges used to make the PD polarity insensitive.

Additional resources can be found on the TI Web site www.ti.com.
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Technical documentation

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Type Title Date
* Data sheet TPS237x: IEEE 802.3af PoE Powered Device Controllers datasheet (Rev. B) 25 Apr 2008
Application note PoE Powered Devices Debug Guidelines PDF | HTML 19 Jul 2021
Application note PoE PD Schematic Review Guidelines PDF | HTML 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
Application note Designing an EMI Compliant PoE with Isolated Flyback 20 May 2008
Application note Practical Guidelines EMI Compliant PoE 27 Mar 2008
Application note 25-W, High-Power PoE Using the TPS2376-H 13 Oct 2006
Application note Powered Device Controllers Comparison 22 Apr 2004

Design & development

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

Evaluation board

TPS2375EVM — TPS2375 IEEE802.3af POE Powered Device Evaluation Module

The HPA028 EVM features the TPS2375 from Texas Instruments Incorporated. The EVM is designed to look like the front end of any Power Over Ethernet (PoE) Powered Device (PD) module. An RJ-45 connector is provided to connect directly to an Ethernet cable having a Power Sourcing Equipment (PSE) (...)

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

SLUC480 — PoE PD Efficiency Calculator

Supported products & hardware

Supported products & hardware

Products
Powered devices
TPS2375 — Class 3 PoE PD with latch protection TPS23750 — Class 3 PoE PD with flyback DC-DC controller TPS23751 — IEEE 802.3at PoE interface with flyback DC-DC controller TPS23752 — IEEE 802.3at PoE interface with flyback DC-DC controller and Sleep Mode Feature TPS23753 — IEEE 802.3-2005 PoE Interface and Isolated Converter and Controller TPS23753A — IEEE 802.3-2005 PoE interface and Isolated Converter controller with Enhanced ESD Ride-Through TPS23754 — IEEE 802.3at, high efficiency, PoE interface and DC/DC controller TPS23754-1 — IEEE 802.3at PoE interface and isolated converter controller TPS23756 — Class 4 PoE PD with flyback/forward DC-DC controller & 12V-57V adapter support TPS23757 — Class 3 PoE PD with flyback/Forward DC-DC controller & 12V-57V Adapter Support TPS2376 — Class 3 PoE PD with adjustable UVLO threshold & latch protection TPS2377 — Class 3 PoE PD with legacy UVLO threshold & latch protection TPS2378 — IEEE 802.3at PoE High-Power PD interface with AUX Control TPS23785B — High-Power, High-Efficiency PoE PD and DC-to-DC Controller TPS2379 — IEEE 802.3at PoE High-Power PD interface with external gate driver
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Calculation tool

TPS2375OR77CALC — TPS2375/TPS2377 Design-in Calculation Tool

This calculator spreadsheet will aid in designing circuits with the TPS2375 and TPS2377. Simply enter the input voltage, the output power range, the output capacitance, and other application specifications, the values of the required external components for the TPS2375 or TPS2377, are (...)
Supported products & hardware

Supported products & hardware

Products
Powered devices
TPS2375 — Class 3 PoE PD with latch protection TPS2377 — Class 3 PoE PD with legacy UVLO threshold & latch protection
Hardware development
Evaluation board
TPS2375EVM — TPS2375 IEEE802.3af POE Powered Device Evaluation Module
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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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Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
TSSOP (PW) 8 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

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