【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
SIM卡是(Subscriber Identity Module 客户识别模块)的缩写,SIM由CPU、ROM、RAM、EEPROM和I/O电路组成。简单来说,如果设备上支持SIM卡功能,那么就可以进行网络上的通信,对于物联网来说是非常方便的。由于SIM接口是对外的,人可以触碰到,所以这个接口要做防静电的处理。
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,很容易耦合进去静电,造成芯片引脚损坏,导致整个板子工作状态不正常。
电路防护图:
图1、电路防护图
由上图我们可以看出,只需要一个TVS器件SR05-4B就可以很好的保护SIM卡,足够达到接触8KV,空气15KV防护等级。而且在Layout中,减少PCB板的使用面积,使得布局布线更加合理化。
器件电气参数:
硕凯电子的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。
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本文由Destiny转载自硕凯电子,原文标题为:基于SR05-4B的SIM卡防护应用,本站所有转载文章系出于传递更多信息之目的,且明确注明来源,不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
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应用方案 发布时间 : 2019-04-03
【视频】硕凯TVS管SMA至DO-218AB封装适配7637车载浪涌5A和5B全套解决方案|世强硬创新产品在线研讨会
在世强硬创新产品在线研讨会——国产汽车电子专场中,硕凯电子技术专家为我们做了演讲。传统TVS现已不能满足大部分客户的需求,为了满足更高了ISO7637-2的测试等级,硕凯特推出7637车载浪涌5A和5B全套解决方案,封装更全面,体积更小巧,性能更稳定,方案更成熟,能解决各种车载浪涌场合的实际防护问题,可以提高客户产品的使用寿命和防护等级!
新产品 发布时间 : 2020-12-23
【应用】基于国产SOT-143封装TVS的USB2.0防护方案
USB2.0的芯片集成度高,易受静电损坏。基于硕凯电子的TVS设计的USB2.0防护方案,在USB2.0的电源线、数据线用1颗TVS对地做防护,钳位静电电压。所用TVS的结电容小于1.2pF,在USB2.0最高速率480Mbps时都可以完整传输信号。
应用方案 发布时间 : 2019-03-22
【应用】硕凯电子双向TVS SMAJ12CA助力小基站天线防雷设计,可承受400W峰值脉冲功率
某种有源天线的防雷击设计,其中需要用到一款TVS(瞬态电压抑制)二极管。本文根据客户需求推荐硕凯电子推出的双向TVS SMAJ12CA,最大钳位电压为19.9V,耐受的瞬间峰值功率可达400W,耐受的反向浪涌电流达到了20.1A。
应用方案 发布时间 : 2023-05-24
电子商城
品牌:硕凯电子
品类:ESD Protection Transient Voltage Suppressors Array
价格:¥0.1750
现货: 68
品牌:硕凯电子
品类:Ultra-Low Capacitance TVS Protection Diode
价格:¥0.0900
现货: 50,100
品牌:硕凯电子
品类:Surface Mount Transient Voltage Suppressors (TVS)
价格:¥0.1813
现货: 32,243
品牌:硕凯电子
品类:Surface Mount Transient Voltage Suppressors (TVS)
价格:¥0.2375
现货: 15,324
品牌:硕凯电子
品类:Surface Mount Transient Voltage Suppressors (TVS)
价格:¥0.1750
现货: 5,060
品牌:硕凯电子
品类:Axial Lead Transient Voltage Suppressors(TVS)
价格:¥0.2750
现货: 4,050
品牌:硕凯电子
品类:Bi-directional Ultra Low Capacitance TVS Array
价格:¥0.1250
现货: 200
现货市场
服务
测试1.2/50us-8/20us组合波,10/700us-5/320us组合波,8/20us单波。能够模拟雷电瞬变引起的浪涌冲击抗干扰测试,最高电压达20KV,电流达20KA。点击预约,支持到场/视频直播测试,资深专家全程指导。
实验室地址: 深圳/上海 提交需求>
测试等级:空气放电30KV±5%;接触放电30KV±5%,适用标准:GB/T 17626.2、IEC61000-4-2、ISO10605、GB/T 19951;给用户产品出电路保护设计方案建议及整改。点击预约,支持到场/视频直播测试,资深专家全程指导。
实验室地址: 深圳/上海 提交需求>
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