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The STEVAL-POE002V1 reference design is a two-stage converter for a powered device (PD), and is able to deliver up to 40 W (5 V/8 A) DC from appropriate 4-pair PoE power sourcing equipment (PSE), or an external auxiliary supply.
The first stage is the Ethernet interface is based on the PM8805 controller with integrated full active bridge rectification. The PoE controller is compliant with the third generation IEEE 802.3bt specification (as well as the preceding 802.3af/at standards), with improved features and increased power capacity that allow new application possibilities for PoE networks, including point of sales and retail logistics devices.
The second stage is the DC-DC converter designed around a fixed frequency flyback topology managed by the configurable PM8804 PWM controller, with secondary synchronous rectification via a gate driver transformer.主要特性
- PM8805 4-pair IEEE 802.3bt compliant PD interface
- Works with power supplied from Ethernet LAN cables or local auxiliary sources
- Line input voltage range: 40 to 60 VDC
- Output stage managed by configurable PM8804 controller
- Output voltage: 5 VDC ±2.5%
- Output current: 8 A
- Peak-to-peak output ripple: <50 mV
- DC-DC full load efficiency: >91%
- Overall full load efficiency: >90%
- Transient response ΔV pk-pk 100% to 50% load step ≈ 700 mV
- Switching frequency ≈ 280 KHz
质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | WEEE Compliant | 材料声明** |
|---|---|---|---|---|---|---|
| STEVAL-POE002V1 | 批量生产 | CARD | 工业 | Ecopack2 | Yes | |
STEVAL-POE002V1
Package:
CARDMaterial Declaration**:
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持 。
样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 核心产品 | 供货状态 | ECCN (US) | Country of Origin | Board production status | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|
| STEVAL-POE002V1 | 7 distributors | 立即购买 | PM8804, PM8805 | 批量生产 | EAR99 | ITALY | - | 100.0 / 1 |
