IEEE 802.3bt PoE-PD interface with embedded dual active bridge

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  • The PM8805 is a system-in-package for smart power supply of Power over Ethernet (PoE) Powered Devices (PD) and it is applicable for power level up to 99.9 W.

    It embeds: two active bridges and their driving circuitry, a charge pump to drive the high-side MOSFETs, the hot swap MOSFET and the interface compliant with IEEE 802.3bt.
    The device performs the physical layer classification, providing the indication of successful PSE type identification. A 4-pair PSE is identified and the information is available by a dedicated matrix of Tx signals.
    The device works with power either from the Ethernet cable or from an external power source such as a wall adapter, with possible prevalence of the auxiliary source with respect to the PoE.
    The PM8805 is suitable to build the interface section of PoE switch mode power supplies targeting the highest conversion efficiency. It provides a PGD signal that can be used to enable a PWM controller, a DC-DC converter or an LED driver.

    主な特徴

    • Dual active bridge, hot swap MOSFETand PoE-PD interface in a system-in-package
    • 100 V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge.
    • 100 V, 0.1 Ω high-side N-ch hot swap MOSFET
    • PoE-PD single-signature interface compliant with IEEE 802.3bt / at / af
    • Supports 4-pair PoE applications
    • Supports 12 V auxiliary sources
    • Identifies which kind of PSE (standard or legacy) is connected with and provides successful IEEE802.3bt / at / af classification indication as a combination of the T0, T1 and T2 signals (open drain)
    • Smart operational modes
    • Programmable classification current with 3.3 ms delay.
    • Optional Autoclass feature
    • Advanced energy-saving MPS timings
    • Two-step hot swap current protection: DC with 1 ms delay and short-circuit with 10 us delay.
    • Controlled pre-charge of the output capacitor
    • PGD signal (open drain) to enable an external PWM controller.
    • Thermal shutdown protection

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PM8805TR QFN 8x8x1 43L P 0.5 6 Dice pad Tape And Reel
アクティブ
3.6775 1000 EAR99 - 在庫チェック

Distributor availability ofPM8805TR

代理店名
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DIGIKEY WORLDWIDE 160 1 Order Now
ARROW EUROPE 500 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 100 1 Order Now
Farnell Element14 EUROPE 225 1 Order Now

代理店レポートによる在庫データ: 2019-12-10

代理店名

DIGIKEY

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500

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2500

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2500

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MOUSER

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100

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Farnell Element14

在庫

225

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EUROPE Order Now

代理店レポートによる在庫データ: 2019-12-10

購入

PM8805TR

パッケージ

QFN 8x8x1 43L P 0.5 6 Dice pad

梱包タイプ

Tape And Reel

Unit Price (US$)

3.6775*

Distributor availability ofPM8805TR

代理店名
地域 在庫 最小発注 Third party link
DIGIKEY WORLDWIDE 160 1 Order Now
ARROW EUROPE 500 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 100 1 Order Now
Farnell Element14 EUROPE 225 1 Order Now

代理店レポートによる在庫データ: 2019-12-10

代理店名

DIGIKEY

在庫

160

Min.Order

1

地域

WORLDWIDE Order Now

ARROW

在庫

500

Min.Order

0

地域

EUROPE Order Now

ARROW

在庫

2500

Min.Order

2500

地域

AMERICA Order Now

MOUSER

在庫

100

Min.Order

1

地域

WORLDWIDE Order Now

Farnell Element14

在庫

225

Min.Order

1

地域

EUROPE Order Now

代理店レポートによる在庫データ: 2019-12-10

製品ステータス

アクティブ

Unit Price (US$)

3.6775

数量

1000

ECCN (US)

EAR99

Country of Origin

-

(*) 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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技術文書

    • 概要 バージョン サイズ アクション
      DS12813
      IEEE 802.3bt PoE-PD interface with embedded dual active bridge
      2.0
      1.68 MB
      PDF
      DS12813

      IEEE 802.3bt PoE-PD interface with embedded dual active bridge

    • 概要 バージョン サイズ アクション
      AN3373
      IEEE802.3at compliant PD + PS design based on PM8803 low power, synchronous flyback PoE converter
      1.0
      1.23 MB
      PDF
      AN3387
      PM8803 layout guidelines
      1.0
      944.44 KB
      PDF
      AN3373

      IEEE802.3at compliant PD + PS design based on PM8803 low power, synchronous flyback PoE converter

      AN3387

      PM8803 layout guidelines

    • 概要 バージョン サイズ アクション
      AN5207
      12 V/8 A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design
      2.0
      2.85 MB
      PDF
      AN5190
      5 V/20 A, active clamp forward converter, Power Over Ethernet (PoE) - IEEE 802.3bt compliant reference design
      2.0
      3.24 MB
      PDF
      AN5237
      High power Poe PD, 3V3 up to 20 A active clamp forward evaluation board
      1.0
      3.23 MB
      PDF
      AN5174
      Power over Ethernet - PD converter with 5 V 8 A output, synchronous Flyback, IEEE802.3bt standard compliant
      1.0
      1.34 MB
      PDF
      AN5207

      12 V/8 A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design

      AN5190

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

      AN5237

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

      AN5174

      Power over Ethernet - PD converter with 5 V 8 A output, synchronous Flyback, IEEE802.3bt standard compliant

関連資料

    • 概要 バージョン サイズ アクション
      Power Management Guide 06.2019
      3.86 MB
      PDF

      Power Management Guide

製品型番 製品ステータス パッケージ グレード RoHSコンプライアンスグレード Material Declaration**
PM8805TR
アクティブ
QFN 8x8x1 43L P 0.5 6 Dice pad インダストリアル Ecopack2

PM8805TR

Package:

QFN 8x8x1 43L P 0.5 6 Dice pad

Material Declaration**:

PDF XML

Marketing Status

アクティブ

Package

QFN 8x8x1 43L P 0.5 6 Dice pad

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.

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