【应用】SOT143封装的国产ESD保护阵列可应用于USB 2.0端口保护
USB2.0的速度可以高达480Mbps,从而在工农业方面都有着广泛的应用。USB2.0接口的电压是:+5V ,电流:最大到1A。但实际使用上肯定存在误差,最大不能超过+/-0.2V 也就是4.8-5.2V 。USB芯片集成度高,但是十分脆弱,一旦受到静电攻击很容易损坏,在信号高速传输过程中不容忍丢包,所以设计时需要考虑抑制静电造成的瞬态过电压干扰,以保证传输质量和产品的可靠性。
针对此应用,电安推出1款SOT143封装的ESD保护阵列TPA143L05,它有接触放电±15KV,空气放电±20KV的静电防护能力。其外形如下图:
其防护原理为当瞬时电压超过瞬态抑制二极管动作电压后,TVS便发生雪崩,给瞬态电流提供一个低阻抗通路,这样瞬时电流由低阻抗通路泄放掉,避开了被保护器件,并且在过电压持续过程中一直保持低阻抗放电状态。当瞬时脉冲结束以后,TVS自动回复高阻状态,整个回路进入正常电压。
其电路的典型接法如下图:
特点如下:
1、贴片SOT143封装
2、断态电压VRWM:5.0V
3、低漏电流IR:1µA
4、钳位电压VC:10V
5、结电容:0.65pF
应用场景:
笔记本电脑;
台式电脑;
网络打印机;
车载USB接口;
多媒体音响;
移动手持电子设备;
其他带有USB2.0接口的设备。
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本文由Bonnie转载自电安科技,原文标题为:【应用】SOT143封装的国产ESD保护阵列可应用于USB 2.0端口保护,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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目录- Company profile Circuit Protection Technologies Overcurrent/Overvoltage Protection device ESD Suppression Solutions Overcurrent Protection/Overvoltage Protection Applications Common Circuit Threatsand Protection Solutions Fuses Fuse Holders PPTC Devices Varistors Gas Discharge Tubes ESD Suppressors TVS Diode Arrays Protection Ics TVS Diodes PLED Bypass Protectors SIDACtor® Protection Thyristors Circuit Breakers
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SMxxC Series SOT-23 Plastic-Encapsulate ESD Protection Diodes
型号- SM15C,SM05C,SM24C,SM03C,SM36C,SM08C,SM18C,SM12C,SMXXC SERIES,SM20C,SMXXC
SRV05 Series 6V 10A Diode Array TVS Diode Arrays (SPA® Diodes) Low Capacitance ESD Protection - SRV05
型号- SRV05,SRV05-4HTG,SRV05 SERIES
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电子商城
品牌:长晶科技
品类:Uni-direction ESD Protection Array
价格:¥0.1080
现货: 94
现货市场
服务
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>
整体外形尺寸小至0.6*0.3*0.3mm (DFN0603),工作电压范围覆盖2.5V~36V,电容值低至0.2pF,浪涌能力最高可达240安培,静电等级可达空气放电、接触放电±30KV。提供免费浪涌测试仪、静电测试仪测试。
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