PM8805

Active
Education

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

Download datasheet Order Direct
Overview
Sample & Buy
Solutions
Documentation
CAD Resources
Tools & Software
Quality & Reliability
eDesignSuite
Get Started
Partner products
Sales Briefcase
  • 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.

    Key Features

    • 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

Recommended for you

Related Applications

Lighting and Controls

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      STEVAL-POE001V1

      Active

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

      PSU and Converter Solution Eval Boards ST

      STEVAL-POE002V1

      Active

      5V/8A, synchronous flyback converter, Power over Ethernet (PoE) IEEE 802.3bt compliant reference design

      PSU and Converter Solution Eval Boards ST

      STEVAL-POE003V1

      Active

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

      PSU and Converter Solution Eval Boards ST

      STEVAL-POE005V1

      Active

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

      PSU and Converter Solution Eval Boards ST

      STEVAL-POE006V1

      Active

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

      PSU and Converter Solution Eval Boards ST

      STEVAL-POEL45W1

      Active

      Power over Ethernet (PoE) powered 45 W LED driver with Bluetooth Low Energy (BLE) enabled control reference design

      LED and General Lighting Solution Eval Boards ST
      STEVAL-POE001V1

      Description:

      Power Over Ethernet (PoE) - IEEE 802.3bt compliant interface reference design
      STEVAL-POE002V1

      Description:

      5V/8A, synchronous flyback converter, Power over Ethernet (PoE) IEEE 802.3bt compliant reference design
      STEVAL-POE003V1

      Description:

      5V/20A, active clamp forward converter, Power Over Ethernet (PoE) - IEEE 802.3bt compliant reference design
      STEVAL-POE005V1

      Description:

      12V/8A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design
      STEVAL-POE006V1

      Description:

      3.3V/20A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design
      STEVAL-POEL45W1

      Description:

      Power over Ethernet (PoE) powered 45 W LED driver with Bluetooth Low Energy (BLE) enabled control reference design

CAD/EDA Symbols, Footprints and Models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
PM8805TR
Active
QFN 8x8x1 43L P 0.5 6 Dice pad Industrial Ecopack2

PM8805TR

Package:

QFN 8x8x1 43L P 0.5 6 Dice pad

Material Declaration**:

PDF XML

Marketing Status

Active

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
PM8805TR Available at 5 distributors

Distributor availability ofPM8805TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3355 1 Order Now
Newark Element14 AMERICA 73 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 2212 1 Order Now
Farnell Element14 EUROPE 2408 1 Order Now

Distributor reported inventory date: 2020-10-19

Distributor Name

DIGIKEY

Stock

3355

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

73

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

2212

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2408

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-19

Buy Direct
Active
EAR99 NEC Tape And Reel QFN 8x8x1 43L P 0.5 6 Dice pad - - CHINA 3.6775 / 1k

PM8805TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

3.6775 / 1k

Distributor availability ofPM8805TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3355 1 Order Now
Newark Element14 AMERICA 73 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 2212 1 Order Now
Farnell Element14 EUROPE 2408 1 Order Now

Distributor reported inventory date: 2020-10-19

Distributor Name

DIGIKEY

Stock

3355

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

73

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

2212

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2408

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-19

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFN 8x8x1 43L P 0.5 6 Dice pad

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

3.6775 / 1k

Country of Origin

CHINA

(*) 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