3.3V/20A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design

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  • This reference design represents a 3.3 V, 20 A converter solution ideal for various applications including wireless access points, supplied with a PoE-PD interface and a DC-DC active clamp forward converter.

    The PoE-PD interface is based on the PM8805 system in package device with two active bridges and an IEEE 802.3bt compliant Powered Device (PD) interface. It can be used in all medium-to-high power 2P and 4P high efficiency PoE and PoE+ applications.
    The DC-DC active clamp forward converter is designed around the PM8804 PWM controller, which is an integrated solution for smart and efficient 48 V converters, featuring a programmable oscillator for the switching frequency, adjustable slope compensation, dual complementary low-side drivers with programmable dead time, programmable soft start, soft turn off and a programmable current sense blanking time.

    Key Features

    • Features of the PM8805 PoE-PD interface:
      • System in package integrating a double active bridge, a hot-swap MOSFET and a PoE-PD
      • Supports legacy high power, 4-pair applications
      • 100 V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge
      • Identifies which kind of PSE (standard or legacy) it is connected to and provides successful IEEE 802.3af/at/bt classification indication as a combination of the T0, T1 and T2 signals (open drain)
      • Smart operation mode selection through the STBY, FAUX and RAUX control signals
      • QFN 56 8x8mm package with 43 pins and 6 exposed pads
    • Features of the PM8804 PWM controller:
      • PWM peak current mode controller
      • Input operating voltage up to 75 V
      • Internal high voltage start up regulator with 20 mA capability
      • Programmable fixed frequency up to 1 Mhz
      • Soft startup with settable time
      • Soft turn off (optionally disabled)
      • Dual 1 APK, low side complementary gate drivers
      • GATE2 can be turned off for reduced consumption
      • 80% maximum duty cycle with internal slope compensation
      • QFN 16 3x3mm package with exposed pad

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STEVAL-POE006V1 PM8804, PM8805
Active
152.0 1 EAR99 ITALY - Check Availability

Distributor availability ofSTEVAL-POE006V1

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4 1 Order Now
AVNET AMERICA 5 0 Order Now
FUTURE WORLDWIDE 5 1 Order Now
MOUSER WORLDWIDE 4 1 Order Now
Farnell Element14 EUROPE 6 1 Order Now

Distributor reported inventory date: 2019-11-11

Distributor Name

DIGIKEY

Stock

4

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

5

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

5

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

4

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

6

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-11

Buy now

STEVAL-POE006V1

Core Product

PM8804, PM8805

Marketing Status

Active

Unit Price (US$)

152.0*

Distributor availability ofSTEVAL-POE006V1

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4 1 Order Now
AVNET AMERICA 5 0 Order Now
FUTURE WORLDWIDE 5 1 Order Now
MOUSER WORLDWIDE 4 1 Order Now
Farnell Element14 EUROPE 6 1 Order Now

Distributor reported inventory date: 2019-11-11

Distributor Name

DIGIKEY

Stock

4

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

5

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

5

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

4

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

6

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-11

Unit Price (US$)

152

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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Technical Documentation

    • Description Version Size Action
      DB3669
      3.3V/20A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design
      3.0
      3.37 MB
      PDF
      DB3669

      3.3V/20A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design

    • Description Version Size Action
      AN5237
      High power Poe PD, 3V3 up to 20 A active clamp forward evaluation board
      1.0
      3.23 MB
      PDF
      AN5237

      High power Poe PD, 3V3 up to 20 A active clamp forward evaluation board

Hardware Resources

    • Description Version Size Action
      STEVAL-POE006V1 GERBER 1.0
      333.61 KB
      ZIP

      STEVAL-POE006V1 GERBER

    • Description Version Size Action
      STEVAL-POE006V1 BOM 1.0
      88.43 KB
      PDF

      STEVAL-POE006V1 BOM

    • Description Version Size Action
      STEVAL-POE006V1 SCHEMATIC 1.0
      708.19 KB
      PDF

      STEVAL-POE006V1 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-POE006V1
Active
CARD Industrial Ecopack2 Yes

STEVAL-POE006V1

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.