-
This reference design integrates a high power standard PoE-PD interface compliant with the third generation IEEE 802.3bt PoE standard, able to support applications up to 100 W.
The PoE-PD interface is based on the PM8805 system in package featuring two embedded active bridges with driving circuitry, a charge pump to drive the high side MOSFETs, a hot swap MOSFET and a standard single-signature interface compliant with IEEE 802.3bt, including detection, classification, UVLO and inrush current limitation.
The device implements IEEE 802.3bt physical layer classification schemes to signal successful PSE type identification to the system: it identifies a 4-pair PSE by monitoring the Ethernet cable pairs and providing the system with a dedicated matrix of Tx signals.
The PM8805 is suitable for building the interface for PoE switch mode power supplies for maximum conversion efficiency, with a PGD signal that can be used to enable downstream DC-DC converters or LED drivers with suitable electrical parameters.主な特徴
- System in package including a dual active bridge, a hot swap MOSFET and a PoE-PD interface
- Robust 100V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge
- Robust 100 V, 0.1 Ω high side N-ch hot swap MOSFET
- PoE-PD single-signature interface compliant with IEEE 802.3bt
- Detection and support of high power, 4-pair applications
- Identifies which kind of PSE (standard or legacy) it is connected with, and provides successful IEEE 802.3af/at/bt classification indication through combination of the T0, T1 and T2 signals (open drain)
- Programmable classification current with 3.3 ms delay
- Advanced energy-saving MPS timings
- Two step hot swap current protection: DC with 1 ms delay and overload with 10 µs delay
- Startup phase (pre-charge of the output capacitor), performed using an internally limited current source
- PGD signal (open drain) to enable an external PWM controller
- Thermal shutdown protection
- RoHS compliant
- WEEE compliant
評価ツール
-
-
画像 製品型番 製造者 概要 
STEVAL-ISA152V1 -- 3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987 
STEVAL-ISA198V1 ST 2 A step down DC - DC switching regulator (VIN = 4.5 V to 60 V) based on the L7987L 
STEVAL-ISA204V1 ST 100W 5V/20A active clamp forward converter based on PM8804 for telecom systems 製品型番3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987
2 A step down DC - DC switching regulator (VIN = 4.5 V to 60 V) based on the L7987L
100W 5V/20A active clamp forward converter based on PM8804 for telecom systems
-
品質 & 信頼性
| 製品型番 | Marketing Status | パッケージ | グレード | RoHSコンプライアンスグレード | WEEE Compliant | 材料宣誓書** |
|---|---|---|---|---|---|---|
| STEVAL-POE001V1 |
量産中
|
CARD | インダストリアル | Ecopack2 | Yes |
|
STEVAL-POE001V1
Package:
CARDMaterial Declaration**:
(**) st.comで提供している材料宣誓書は、パッケージ･ファミリ内で最も一般的に使用されているパッケージに基づく汎用ドキュメントの場合があります。そのため、特定の製品では100%正確ではない可能性があります。特定の製品情報については、セールスサポートまでお問い合わせください
サンプル & 購入
| 製品型番 | 販売代理店からオーダー | STからオーダー | コア製品 | 製品ステータス | サプライヤ | ECCN (US) | ECCN (EU) | Country of Origin | Board production status | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-POE001V1 | 4 distributors | 購入 | PM8805 |
量産中
|
ST | EAR99 | NEC | ITALY | - | 53.0 / 1 |
（*）概算用の希望小売単価（US$）です。現地通貨でのお見積りについては、STのセールス･オフィスまたは販売代理店までお問い合わせください。
