【选型】4端口USB HUB控制器芯片CH335F用于电力线路在线监测装置,符合USB2.0协议规范
电力线路在线监测装置,是用于实现泛在电力物联网感知层应用。通过无线2G、3G、4G无线通讯技术实时传输线路通道环境及状态信息,可以对输电线路通道环境及状态实时分析并及时预警。电力线路在线监测装置调试、存储、信息传输需要扩展多个USB接口,USB HUB控制器芯片可以扩展USB接口并可以同时使用。
根据以上需求,本文推荐采用沁恒推出的CH335F,是符合USB2.0协议规范的4端口USB HUB控制器芯片,提供4个USB2.0下行端口,其中一个下行端口支持USB 3.0 SuperSpeed直通上行端口。CH335F是工业级设计,外围精简,适合电力线路在线监测装置应用。
CH335F的内部系统框图如下:
在电力线路在线监测装置中应用CH335F具有以下优点:
1、集成度高、外围精简,上行端口内置 上拉电阻,下行端口内置下拉电阻,简化设计,减小PCB尺寸;
2、支持高性能的MTT模式,能够实现多端口大量数据满带宽并发传输;
3、具有各端口独立过流检测或GANG整体过流检测,可以保障数据通讯安全稳定;
4、端口状态LED指示灯可以支持九灯应用,能够监测端口运行状态,指示端口过流、传输错误等异常现象。
CH335F的九灯应用如下:
综上所述,沁恒推出的4端口USB HUB控制器芯片CH335F非常适合用于电力线路在线监测装置
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