Power Over Ethernet (PoE) - IEEE 802.3bt compliant interface reference design

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  • This reference design integrates a high power standard PoE-PD interface compliant with the third generation IEEE 802.3bt PoE standard, able to support applications up to 100 W.

    The PoE-PD interface is based on the PM8805 system in package featuring two embedded active bridges with driving circuitry, a charge pump to drive the high side MOSFETs, a hot swap MOSFET and a standard single-signature interface compliant with IEEE 802.3bt, including detection, classification, UVLO and inrush current limitation.
    The device implements IEEE 802.3bt physical layer classification schemes to signal successful PSE type identification to the system: it identifies a 4-pair PSE by monitoring the Ethernet cable pairs and providing the system with a dedicated matrix of Tx signals.
    The PM8805 is suitable for building the interface for PoE switch mode power supplies for maximum conversion efficiency, with a PGD signal that can be used to enable downstream DC-DC converters or LED drivers with suitable electrical parameters.

    Key Features

    • System in package including a dual active bridge, a hot swap MOSFET and a PoE-PD interface
    • Robust 100V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge
    • Robust 100 V, 0.1 Ω high side N-ch hot swap MOSFET
    • PoE-PD single-signature interface compliant with IEEE 802.3bt
    • Detection and support of high power, 4-pair applications
    • Identifies which kind of PSE (standard or legacy) it is connected with, and provides successful IEEE 802.3af/at/bt classification indication through combination of the T0, T1 and T2 signals (open drain)
    • Programmable classification current with 3.3 ms delay
    • Advanced energy-saving MPS timings
    • Two step hot swap current protection: DC with 1 ms delay and overload with 10 µs delay
    • Startup phase (pre-charge of the output capacitor), performed using an internally limited current source
    • PGD signal (open drain) to enable an external PWM controller
    • Thermal shutdown protection
    • RoHS compliant
    • WEEE compliant

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STEVAL-POE001V1 PM8805
Active
53.0 1 EAR99 ITALY - Check Availability

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Distributor reported inventory date: 2019-07-15

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5

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EUROPE Order Now

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2

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Farnell Element14

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9

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Distributor reported inventory date: 2019-07-15

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STEVAL-POE001V1

Core Product

PM8805

Marketing Status

Active

Unit Price (US$)

53.0*

Distributor availability ofSTEVAL-POE001V1

Distributor Name
Region Stock Min. Order Third party link
ARROW EUROPE 5 0 Order Now
MOUSER WORLDWIDE 2 1 Order Now
Farnell Element14 EUROPE 9 1 Order Now
ANGLIA Live EUROPE 1 1 Order Now

Distributor reported inventory date: 2019-07-15

Distributor Name

ARROW

Stock

5

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

9

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-15

Unit Price (US$)

53

Quantity

1

ECCN (US)

EAR99

Country of Origin

ITALY

Board production status

-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DB3668
      Power Over Ethernet (PoE) - IEEE 802.3bt compliant interface reference design
      4.0
      404.75 KB
      PDF
      DB3668

      Power Over Ethernet (PoE) - IEEE 802.3bt compliant interface reference design

Hardware Resources

    • Description Version Size Action
      STEVAL-POE001V1 GERBER 1.0
      347.38 KB
      ZIP

      STEVAL-POE001V1 GERBER

    • Description Version Size Action
      STEVAL-POE001V1 BOM 2.0
      39.54 KB
      PDF

      STEVAL-POE001V1 BOM

    • Description Version Size Action
      STEVAL-POE001V1 SCHEMATIC 2.0
      79.47 KB
      PDF

      STEVAL-POE001V1 SCHEMATIC

Publications and Collaterals

    • Description Version Size Action
      eDesignSuite-The smart way to design your application 1.0
      842.88 KB
      PDF

      eDesignSuite-The smart way to design your application

Legal

    • Description Version Size Action
      Evaluation products license agreement 1.6
      74.12 KB
      PDF

      Evaluation products license agreement

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
STEVAL-POE001V1
Active
CARD Industrial Ecopack2 Yes

STEVAL-POE001V1

Package:

CARD

Material Declaration**:

Marketing Status

Active

Package

CARD

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.