【应用】国产TVS阵列SR05-4B用于八轴运动控制卡USB2.0端口ESD防护，典型结电容0.6pF

时间： 2021-06-19 来源：世强

技术问答

八轴运动控制卡一般配有USB2.0接口用于系统升级和文件传输，为避免USB2.0接口因热插拔或人体接触放电影响导致相关敏感电子元件被打死，建议选择低容值TVS阵列做ESD防护设计，满足小型化设计需求；同时，抗ESD能力至少符合IEC 61000-4-2（ESD），4级（±15kV空气，±8kV接触放电）能力。

针对如上设计需求，本文推荐硕凯电子TVS阵列SR05-4B，采用SOT-26封装，可用于双USB2.0端口防护，最大反向工作电压5V，接触放电能力达±8kV，空气放电能力±15kV，工作温度范围-55~150℃，典型应用示意图参考如下图1所示。

图1：硕凯电子TVS阵列SR05-4B用于USB2.0端口防护示意图

推荐硕凯电子TVS阵列SR05-4B理由如下：

1、典型结电容0.6pF，低的结电容值对高速传输的数据信号影响更低；

2、采用SOT-26小尺寸封装，最大封装尺寸3.1x2.8mm，有助于小型化设计；

3、世强平台常备库存，具有良好的供货交期，可以快速支持样品和量产服务。

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【应用】TVS SR05-4B用于SIM卡防护，可通过5A浪涌电流有效进行保护

由于SIM卡容易被接触，尤其是集成度很高的板子上，一定要加防护器件，否则很容易耦合进静电。硕凯电子的TVS SR05-4B的结电容非常小，在0.5pF到1pF之间，所以不会影响通信，而且SR05-4B的最大通流量是可以通过5A的浪涌电流，远高于普通的ESD（静电防护器件），对静电有更好的泄放通路。

应用方案发布时间 : 2020-05-08

【应用】使用硕凯电子的TVS和ESD二极管，设计USB Type-C接口静电防护方案

针对Type-C接口的静电防护需求及实际电路环境，硕凯电子设计了静电防护方案，在Type-C接口的电源部分，用一颗大通流的TVS对地做浪涌和静电防护；信号部分用了阵列式ESD，体积小，节约PCB空间，便于设计；采用低容值ESD器件，满足高速传输要求。

应用方案发布时间 : 2019-03-19

【应用】硕凯电子ESD保护器件用于智能网联汽车监控终端，具有低结电容，可提供EMC测试及整改方案

客户设计智能网联汽车监控终端需要HDMI端口进行数据传输，硕凯ESD保护器件能为HDMI接口提供完整的保护方案，并且可以提供EMC相关方案整改。硕凯ESD防护器件低结电容、小封装、高静电防护等级。

应用方案发布时间 : 2023-02-15

【选型】硕凯电子（Socay）电路保护器件（GDT/TVS/ESD/TSS/MOV/MLV/PPTC/SPG）选型指南

目录- 公司简介 GDT陶瓷气体放电管 TVS瞬态抑制二极管 ESD静电保护元件 TSS半导体放电管 MLV贴片压敏电阻高分子ESD MOV压敏电阻 SPG强效放电管 PPTC自恢复保险丝贴片磁珠贴片电感

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