产品概述
描述
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.
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所有功能
- 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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全部资源
| Resource title | 版本 | Latest update |
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产品规格 (2)
| Resource title | 版本 | Latest update | ||
|---|---|---|---|---|
| 2.0 | 02 Apr 2019 |
02 Apr 2019
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| 1.0 | 22 Mar 2017 |
22 Mar 2017
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应用手册 (2)
| Resource title | 版本 | Latest update | ||
|---|---|---|---|---|
| 1.0 | 13 Sep 2018 |
13 Sep 2018
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| 1.0 | 27 Jun 2014 |
27 Jun 2014
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工具/软件相关的应用笔记 (4)
| Resource title | 版本 | Latest update | ||
|---|---|---|---|---|
| 2.0 | 20 May 2019 |
20 May 2019
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| 2.0 | 17 May 2019 |
17 May 2019
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| 1.0 | 20 Dec 2018 |
20 Dec 2018
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| 1.0 | 18 Oct 2018 |
18 Oct 2018
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手册 (1)
| Resource title | 版本 | Latest update | ||
|---|---|---|---|---|
| 06.2021 | 09 Sep 2021 |
09 Sep 2021
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EDA符号、封装和3D模型
STMicroelectronics - PM8805
为您的应用下载所有EDA符号、封装和3D模型，加快您的设计速度。您可以从大量CAD格式中进行选择，以匹配您的设计工具链。
符号
封装
3D模型
样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 供货状态 | ECCN (US) | ECCN (EU) | 包装类型 | 封装 | 温度（ºC） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||
| PM8805TR | 1 distributors |
批量生产
|
EAR99 | NEC | Tape And Reel | QFN 8x8x1 43L P 0.5 6 Dice pad | - | - | CHINA | 4.0452 / 1k | ||
供货状态
批量生产ECCN (US)
EAR99Budgetary Price (US$)*/Qty
4.0452 / 1k