MAX5971A

单端口、40W、IEEE 802.3af/at PSE控制器,内置MOSFET

40W、单端口、IEEE 802.3af/at兼容PSE控制器,集成0.5Ω功率MOSFET和检流电阻


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说明

MAX5971A为单端口、供电设备(PSE)电源控制器,设计用于IEEE® 802.3af/at兼容PSE。该器件为用电设备(PD)提供侦测、分级、限流、直流和交流负载断开检测功能。MAX5971A可自动工作,无需任何软件编程,并具有集成的功率MOSFET和检流电阻。该器件还支持最新的5级和2级事件分级,用于对大功率PD进行检测和分级。MAX5971A能够为单个端口提供高达40W的功率(使能5级),并可对传统PD提供大电容检测。

MAX5971A提供输入欠压锁定(UVLO)、输入过压锁定、过热检测、启动过程中的输出电压摆率限制以及LED状态指示。

MAX5971A采用节省空间的28引脚TQFN (5mm x 5mm)封装,工作于扩展级(-40°C至+85°C)温度范围。
MAX5971A:典型工作电路 MAX5971A:典型工作电路 放大+

关键特性

  • 兼容于IEEE 802.3af/at
  • 为单端口PSE应用提供高达40W功率
  • 集成导通电阻为0.5Ω的功率MOSFET和检流电阻
  • PD检测和分级
  • 对5级PD提供可编程电流限制
  • 为传统设备提供大电容检测
  • 支持直流和交流负载断开检测
  • 折返式和占空比受控的电流限制
  • LED指示器用于指示端口状态
  • 直接快速关断控制
  • 节省空间的28引脚TQFN (5mm x 5mm)封装

应用

  • 工业自动控制
  • 单端口PSE端点应用
  • 单端口PSE电源(中跨系统)
  • 交换机/路由器
  • 无线LAN接入点/WiMAX™基站
Part NumberComplianceHigh Power ModeChannelsPort Current ReadoutLoad DisconnectPackage/PinsOper. Temp.
(°C)
Budgetary
Price
See Notes
MAX5971A 
IEEE 802.3af
IEEE 802.3at
Yes1No
AC/DC
DC
TQFN/28
-40 to +85$4.29 @1k
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Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX5971AEVKIT: MAX5971A评估板

技术资料

应用笔记 6220 40W Single Port MAX5971A Current Sensing
应用笔记 6161 25.5W-80W Class 5 Single Port PoE Power Injector

质量和环境数据

产品可靠性报告: MAX5971A.pdf 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX5971AETI+
  • MAX5971AETI+T
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

    质量管理体系 >
    环境管理体系 >

     
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