产品概述
描述
This reference design represents a 3.3 V, 20 A converter solution ideal for various applications including wireless access points, supplied with a PoE-PD interface and a DC-DC active clamp forward converter.
The PoE-PD interface is based on the PM8805 system in package device with two active bridges and an IEEE 802.3bt compliant Powered Device (PD) interface. It can be used in all medium-to-high power 2P and 4P high efficiency PoE and PoE+ applications.
The DC-DC active clamp forward converter is designed around the PM8804 PWM controller, which is an integrated solution for smart and efficient 48 V converters, featuring a programmable oscillator for the switching frequency, adjustable slope compensation, dual complementary low-side drivers with programmable dead time, programmable soft start, soft turn off and a programmable current sense blanking time.
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所有功能
- Features of the PM8805 PoE-PD interface:
- System in package integrating a double active bridge, a hot-swap MOSFET and a PoE-PD
- Supports legacy high power, 4-pair applications
- 100 V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge
- Identifies which kind of PSE (standard or legacy) it is connected to and provides successful IEEE 802.3af/at/bt classification indication as a combination of the T0, T1 and T2 signals (open drain)
- Smart operation mode selection through the STBY, FAUX and RAUX control signals
- QFN 56 8x8mm package with 43 pins and 6 exposed pads
- Features of the PM8804 PWM controller:
- PWM peak current mode controller
- Input operating voltage up to 75 V
- Internal high voltage start up regulator with 20 mA capability
- Programmable fixed frequency up to 1 Mhz
- Soft startup with settable time
- Soft turn off (optionally disabled)
- Dual 1 APK, low side complementary gate drivers
- GATE2 can be turned off for reduced consumption
- 80% maximum duty cycle with internal slope compensation
- QFN 16 3x3mm package with exposed pad
- Features of the PM8805 PoE-PD interface:
特别推荐
全部资源
| 资源标题 | 版本 | 更新时间 |
|---|
Board Manufacturing Specifications (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| ZIP | 1.0 | 04 Jan 2019 | 04 Jan 2019 |
物料清单 (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| 1.0 | 04 Jan 2019 | 04 Jan 2019 |
Schematic Pack (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| 1.0 | 04 Jan 2019 | 04 Jan 2019 |
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-POE006V1 | 批量生产 | CARD | 工业 | Ecopack2 | Yes | |
STEVAL-POE006V1
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 | Order from distributors | 从ST订购 | 核心产品 | 供货状态 | 供应商 | ECCN (US) | ECCN (EU) | Country of Origin | Board production status | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-POE006V1 | distributors 无法联系到经销商，请联系我们的销售办事处 | PM8804, PM8805 | 批量生产 | ST | EAR99 | NEC | ITALY | - | |