产品概述
描述
The PM8800A integrates a standard power over Ethernet (PoE) interface and a current mode PWM controller to simplify the design of the power supply sections of all powered devices.
The PoE interface incorporates all the functions required by the IEEE 802.3af including detection, classification, under-voltage lockout (UVLO) and in-rush current limitation.
PM8800A specifically targets PD with extended power requirement with respect to the limit imposed by the 802.3af standard, embedding a hot-swap MOSFET capable of sustaining twice the current of the 802.3af standard with a programmable DC current limit.
The integrated switching regulator has been designed to work with power either form the Ethernet cable connection or from an external power source such as AC adapter.
The DC-DC section of the PM8800A features a programmable oscillator frequency, soft-start, slope compensation and embeds a voltage output error amplifier allowing use in both isolated and non isolated configuration.
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所有功能
- Current mode pulse width modulator
- Thermal shutdown protection
- Programmable soft-start
- Programmable oscillator frequency
- 80% maximum duty cycle with internal slope compensation
- Power good indication
- Supports both isolated and non-isolated applications.
- Programmable DCcurrent limit up to 800 mA
- Programmable classification current
- IEEE 802.3af compliant PD interface
- Integrated 100V, 0. 5Ω, 800mA Hot-Swap MOSFET
- Works with power supplied from Ethernet LAN cables or from local auxiliary sources
- Programmable in-rush current limit
- High voltage start-up bias regulator
- Integrated signature resistor
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特别推荐
EDA符号、封装和3D模型
STMicroelectronics - PM8800
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符号
封装
3D模型
质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| PM8800A | NRND | HTSSOP16 | 工业 | Ecopack2 | |
| PM8800ATR | NRND | HTSSOP16 | 工业 | Ecopack2 |
(**) 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 | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | 封装 | 包装类型 | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | 温度（ºC） | Operating Temperature (°C) (min) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| PM8800ATR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | HTSSOP16 | Tape and Reel | PHILIPPINES | EAR99 | NEC | - | - | - | |||
| PM8800A | | | distributors 无法联系到经销商，请联系我们的销售办事处 | HTSSOP16 | Tube | PHILIPPINES | EAR99 | NEC | - | - | - | |||
PM8800ATR NRND
PM8800A NRND