MAX5971BEVKIT

MAX5971B评估板


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说明

MAX5971B评估板(EV kit)是完全安装并经过测试的表贴PCB,具有以太网单端口供电设备(PSE)电路,用于-54V供电系统。MAX5971B PSE控制器IC符合IEEE® 802.3af/at标准,采用28引脚TQFN封装,内部n沟道功率MOSFET构成评估板上的主PSE电路。IC用于单端口以太网供电(PoE)系统。

评估板为IC的I²C兼容2线接口提供光隔离。隔离接口通过板上USB电路连接到PC机的USB端口。评估板可以重新配置成用户的独立微控制器接口,用于隔离或非隔离操作。独立工作模式下,用户必须提供一路+3.3V、35mA独立电源。评估板需要一路可提供1A或更高电流的-32V至-60V供电电源(-54V电源),通过10/100/1000BASE-TX以太网端口为用电设备(PD)供电。评估板能够演示PD侦测、分类、限流控制及其它IEEE 802.3af/at PSE标准功能。

IC通过检测端口电流、控制IC内部功率MOSFET,对以太网端口的-54V直流电源进行控制。电流馈入1Gb x 1Gb MagJack®模块的以太网输出端口。

评估板能够演示IC的所有功能,例如:可配置的工作模式、通过I²C接口获取端口电流信息、大功率模式(可编程到最高40W)、PD侦测(包括传统的PD侦测)、PD分类、过流保护、电流折返、欠压/过压保护和交流/直流断开监测。所有这些功能均可在评估板上进行配置,为电压、电流测量提供额外的测试点。评估板还可以配置成中跨或端点网络操作,评估软件兼容于Windows® 2000、Windows XP®和Windows Vista®,提供友好的用户界面用于访问每个寄存器位,演示IC功能。程序采用菜单驱动,提供带控制按钮的图形用户界面(GUI)和支持IC系统级自动评估、测试的宏引擎。程序的宏输出文件可自动保存。

订购评估板,基于PC对IC进行全面评估。如需评估MAX5971A IC,请订购MAX5971A评估板。

关键特性

  • 符合IEEE 802.3af/at标准的PSE电路
  • 通过I²C接口读取端口电流
  • 大功率5级模式配置,可达40W
  • -32V至-60V、1A输入电源
  • 以太网端口
    • RJ45 10/100/1000BASE-TX以太网数据输入端口
    • RJ45 10/100/1000BASE-TX以太网PSE输出端口
  • 演示MAX5971B内部功率开关和电流检测
  • 演示标准和传统的PD侦测与分类
  • 可配置中跨和端点模式
  • 可配置交流/直流负载撤除和断开监测
  • 方便的电压和电流测试点
  • 用于演示IC的输出端口LED状态指示
  • 可选择隔离I²C兼容2线PC接口
  • 可重新配置为独立工作或与外部微控制器配合工作(需要+3.3V、35mA电源)
  • Windows 2000、Windows XP和Windows Vista (32位)兼容软件
  • 经过验证的PCB布局
  • 完全安装并经过测试

应用

  • 单端口PSE端点应用
  • 单端口PSE电源(中跨系统)
  • 交换机/路由器
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。

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