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.

    主要特性

    • 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
批量生产
3.6775 1000 EAR99 - 查看供货情况

Distributor availability ofPM8805TR

代理商名称
地区 库存 最小订购量 Third party link
ARROW AMERICA 2500 2500 Order Now
Farnell Element14 EUROPE 180 1 Order Now

代理商库存报告日期: 2019-10-16

代理商名称

ARROW

库存

2500

Min.Order

2500

地区

AMERICA Order Now

Farnell Element14

库存

180

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-10-16

PM8805TR

封装

QFN 8x8x1 43L P 0.5 6 Dice pad

包装类型

Tape And Reel

单价(US$)

3.6775*

Distributor availability ofPM8805TR

代理商名称
地区 库存 最小订购量 Third party link
ARROW AMERICA 2500 2500 Order Now
Farnell Element14 EUROPE 180 1 Order Now

代理商库存报告日期: 2019-10-16

代理商名称

ARROW

库存

2500

Min.Order

2500

地区

AMERICA Order Now

Farnell Element14

库存

180

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-10-16

供货状态

批量生产

单价(US$)

3.6775

数量

1000

ECCN (US)

EAR99

Country of Origin

-

(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商

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出版刊物和宣传资料

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      Power Management Guide 06.2019
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产品型号 供货状态 封装 等级规格 符合RoHS级别 材料声明**
PM8805TR
批量生产
QFN 8x8x1 43L P 0.5 6 Dice pad 工业 Ecopack2

PM8805TR

Package:

QFN 8x8x1 43L P 0.5 6 Dice pad

Material Declaration**:

PDF XML

Marketing Status

批量生产

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.