硕凯电子针对多轴飞行器的浪涌和静电防护提出解决方案

时间： 2019-04-29 来源：硕凯电子

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多轴飞行器因其结构简单，组装方便，已经越来越接近大家的生活。随着MEMS传感器、微控制器、电机和电池技术的发展和普及，多轴飞行器已经成为微小型无人机中的新锐力量。直到今天，多轴飞行器已经应用到各个领域，如军事应用、公安追捕、灾害搜救、地理调查、输电线巡查、电影拍摄等。

现实生活中，用户使用多轴飞行器时，经常会出现多轴飞行器莫名其妙的损坏，因此多轴飞行器的EMC可靠性必须得到高度重视。针对这些问题，硕凯电子已经提出相应的浪涌和静电解决方案。

一、电源部分热插拔浪涌防护方案

多轴飞行器一般采用12V左右的电池供电，电流比较大，达到几安培，当12V电源接口进行热插拔时，会产生比较大的浪涌电流，即CDE事件。浪涌电流经常将电源管理IC击穿，因此这里需要加入瞬态抑制二极管进行瞬态箝位，起到保护后端电源管理IC的作用。

二、电机部分反向电动势防护方案

多轴飞行器通过频繁控制多个电机的转速和正反转来实现前进、后退、起飞、降落等功能，由于电机的正反转或者加减速容易产生反向电动势或者瞬间过压等现象，很容易将电机的驱动器件MOS击穿，因此这里需要加入瞬态抑制二极管进行瞬态箝位，起到保护MOS的作用。

三、USB等外部接口的静电防护方案

多轴飞行器由于经常与人手进行接触，很容易产生静电放电现象，当天气比较干燥时，静电电压会更高，因此多轴飞行器需要进行静电抗扰度测试，需符合IEC61000-4-2标准。静电测试时，需要对裸露的金属接口进行接触放电，其他部分进行空气放电测试，因此对于多轴飞行器的USB接口、SD卡接口、GPS天线接口、按键等都需要加入静电保护器件ESD进行静电防护。

1.USB口防护方案

2.GPS天线接口防护方案

3.SD卡接口防护方案

使用SRV05-4集成芯片,它由8支控向二极管构成两个“桥式”电路，共享了一支“雪崩二极管”，此种“桥式”电路对“正”的ESD经过导向由雪崩二极管进行箝位，而对“负”的ESD由控向二极管直接箝位，是非常好的ESD防护方案。

四、TVS/ESD选型

需要注意以下几点：

1、断态电压≥电池电压的1.1倍以上为宜，否则TVS/ESD容易损坏。

2、尽量选用残压值低的器件，能起到比较好的浪涌保护效果。

3、高速信号接口选用低结电容值产品，否则信号不能正常通信。

4、直流电源口选用单向二极管效果更佳。

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本文由宝丁转载自硕凯电子，原文标题为:深度解析多轴飞行器浪涌和静电解决方案，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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larrychen Lv7. 资深专家 2020-11-03

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目录- Surface Mount Transient Voltage Suppressors(TVS) Axial/Radial Lead Transient Voltage Suppressors (TVS) Dual Programmable Transient Voltage Suppressor(TVS)

型号- 5.0SMDJ170C,P4SMA16A,SMAJ6.0CA,SMAJ40CA,30KPA170CA,SMF10CA,KD-012,5.0SMDJ170A,8.0SMDJ24A,SMDJ78CA,KD-015,5.0SMDJ15,5.0SMDJ14,KD-025,5.0SMDJ13,5.0SMDJ12,5.0SMDJ19,KD-020,5.0SMDJ18,5.0SMDJ17,5.0SMDJ16,5.0SMDJ300CA,1.5SMC13CA,5.0SMDJ11,SMCJ14CA,P4SMA18A,SMDJ58C,K,5.0SMDJ85C,5.0SMDJ85A,P4SMA16CA,SMCJ100CA,P6KE68C,20KPA48CA,5KP30C,SMBJ300A,5KP30A,SMBJ150CA,SMF120CA,8.0SMDJ26A,SMDJ170A,SMAJ70A,P4SMA520A,SMAJ70C,SMDJ170C,3KP80CA,SMDJ58A,SMCJ30C,SA48CA,SMCJ30A,SA180C,1.5KE500,SA180A,SMAJ7.0,SMAJ7.5,SA22CA,SMAJ100C,P6KE8.2CA,SMAJ100A,P4KE180A,5.0SMDJ170CA,P4KE180C,SA110CA,30KPA54CA,P4SMA82CA,SMDJ54A,1.5KE520,30KPA198A,SMDJ160CA,20KPA180A,3KP14CA,SMBJ400CA,SMDJ54C,SMF36CA,SMCJ80CA,P6SMB51CA,P4KE22CA,8.0SMDJ22A,SMCJ220CA,15KPA40CA,5.0SMDJ80A,5.0SMDJ80C,1.5KE51A,1.5SMC39CA,1.5KE51C,P6SMB,1.5KE36CA,SA70CA,5KP36C,15KPA100A,5KP36A,1.5KE550,P6SMB16A,30KPA,SMAJ18CA,SA17CA,1.5KE170CA,5KP90CA,SMDJ51C,SMF,SMDJ51A,3KP140CA,3KP45CA,P4SMA170A,P6SMB15A,P4SMA10A,3KP58CA,1.5KE56A,1.5SMC440A,LCE64A,P6SMB520A,SA5.0CA,1.5KE56C,5KP24CA,P6SMB16CA,P4SMA11A,P6KE500C,P6KE500A,SMBJ90C,SMBJ90A,SMF64A,SMBJ12CA,P6SMB13A,SMBJ5.0A,P4SMA12A,SMBJ5.0C,LCE6.5,P6SMB12A,SMBJ9.0,P4SMA13A,P6KE180CA,P6SMB10A,P4SMA47CA,P6SMB11A,KA-190,SMDJ5.0,P6SMB100CA,5.0SMDJ78CA,15KPA18CA,P4KE400A,P4KE400C,1.5KE10CA,LCE60A,SMF60A,P4SMA15A,15KPA30A,30KPA84A,P6KE27CA,5KP33A,P6SMB82CA,15KPA180CA,1.5SMC500CA,5KP11CA,30KPA36CA,5KP33C,20KPA52CA,P4KE6.8CA,P4KE6.8C,P6SMB47CA,1.5SMC250CA,P6SMB220CA,3KP140C,3KP140A,P4KE220,SA9.0,SMDJ200CA,3KP64C,SMDJ190CA,SMF70A,15KPA24A,30KPA90A,1.5KE380CA,3KP64A,P6KE7.5,P4KE20C,P4KE20A,SMAJ48CA,SMBJ43CA,SMCJ7.5C,SMCJ7.5A,SMAJ400A,30KPA71CA,SMBJ180,SMF19CA,LCE7.0,SA90A,SA90C,LCE7.5,30KPA102A,SMBJ18C,SMBJ18A,P4KE200,1.5SMC75CA,SMAJ300CA,P6KE220CA,SA40CA,SMBJ190,15KPA22A,SMBJ19C,KA-170,SMBJ19A,20KPA96CA,SMBJ160,SMDJ90,3KP9.0CA,SA100C,S61089,SMBJ16C,P6KE100CA,SMBJ16A,20KPA240CA,5KP28C,SMBJ30CA,5KP28A,30KPA108A,SMDJ85,SMBJ170,SMF110A,SMDJ80,15KPA28A,SMAJ180C,SMAJ8.5CA,SMAJ180A,P4KE100A,P4KE100C,SMBJ17C,SMBJ17A,SMF85CA,5.0SMDJ220A,SMBJ120CA,SMDJ78,SMDJ75,20KPA120CA,5KP8.0C,SMBJ140,SMDJ70,5KP8.0A,1.5SMC10A,3KP75CA,SMBJ14C,SMBJ14A,SM8S,P6SMB18A,SMDJ16CA,SMBJ130C,SMBJ130A,1.5SMC130CA,5.0SMDJ350A,SMDJ64,15KPA26A,15KPA48CA,SMDJ440CA,SMBJ150,SMDJ60,5KP120CA,SMBJ15C,SA100A,SMBJ15A,SMAJ170CA,SMDJ58,KA-133,SMDJ54,P6KE75,SMBJ120,SMDJ51,5.0SMDJ80,15KPA180A,30KPA260CA,SMBJ11C,SMBJ12A,SMAJ6.0A,P6KE62CA,SMAJ6.0C,SMDJ48,P6KE68,SMDJ45,5.0SMDJ85,1.5SMC91A,SMDJ43,SMBJ130,SA7.5CA,SMDJ40,5.0SMDJ90,P6KE82,5.0SMDJ78C,SMCJ7.0C,5.0SMDJ78A,SMCJ7.0A,SMDJ51CA,15KPA22CA,SMBJ12C,5.0SMDJ48CA,SMBJ13C,SMBJ13A,P6KE75A,SMDJ36,P6KE75C,SMDJ33,P4SMA220A,SMBJ100,SMDJ30,SMCJ150C,KB-380,P6KE91,SMCJ150A,20KPA172A,P4KE27C,SA6.0C,SA6.0A,SMDJ28,5KP8.5C,5.0SMDJ60,SMDJ26,5KP8.5A,SMAJ78A,SMDJ24,5.0SMDJ64,KA-100,SMAJ78C,SMDJ22,SMBJ110,SMDJ20,5KP120A,5KP120C,SMBJ10C,SMBJ10A,SMBJ11A,P4KE27A,5.0SMDJ400A,5.0SMDJ78,SMAJ22CA,SMDJ19,SMDJ18,SMDJ17,SMDJ16,5.0SMDJ70,8.0SMDJ22CA,SMCJ6.5CA,SMDJ15,SMDJ14,SMDJ13,5.0SMDJ75,SMDJ12,SMDJ11,SMAJ75A,SMDJ10,SMCJ36A,SMAJ75C,P6KE30,SMCJ36C,SA190CA,5.0SMDJ75C,5.0SMDJ75A,5.0SMDJ48,P4SMA9.1A,5.0SMDJ45,SMF54CA,5.0SMDJ40,P4SMA91A,1.5KE100A,P6KE27,P6SMB170A,1.5KE100C,5.0SMDJ43,P6KE24,P6KE22,P4KE250,P6KE43,SMCJ45CA,3KP60A,30KPA84CA,P4KE24C,P6KE75CA,P4KE24A,5.0SMDJ58,SMAJ6.5C,5.0SMDJ51,P6KE39,3KP60C,P6KE36,5.0SMDJ54,SMAJ6.5A,SMBJ440A,P6KE33,SMCJ58CA,P6KE51,SMDJ7.5CA,5.0SMDJ17CA,1.5KE18CA,5.0SMDJ26,5.0SMDJ24,5KP60CA,5.0SMDJ28,5.0SMDJ70CA,5.0SMDJ22,SMCJ33A,P6KE47,5.0SMDJ20,SMCJ33C,P4SMA350A,P6KE62,3KP6.5,P4KE22C,P4KE22A,3KP6.0,P4SMA6.8CA,5.0SMDJ36,SA6.5C,5.0SMDJ33,P4KE6.8A,SA6.5A,P6KE56,5.0SMDJ30,5.0SMDJ33CA,SMAJ60,SA36CA,SMBJ,1.5KE6.8,SMDJ20CA,SMF6.0A,P4SMA15CA,LCE58A,SMAJ58,SMAJ54,3KP6.0CA,SMAJ51,SMDJ160A,3KP26CA,SMAJ60A,SMAJ,SMAJ60C,SMDJ160C,5.0SMDJ70C,5.0SMDJ70A,SMDJ48C,SMDJ48A,SMF22CA,SMCJ20C,SMAJ45,SMCJ7.0CA,SMAJ48,SMCJ20A,P4KE36CA,SMAJ43,SMAJ40,P6KE200A,SMDJ,20KPA36CA,SMBJ85C,SMBJ85A,1.5KE600,1.5KE380A,P4KE9.1,1.5KE380C,P4KE120CA,SMAJ6.0,P4SMA400CA,SMAJ6.5,SMAJ36,P6KE200C,SMAJ30,SMAJ33,SMF180A,SMCJ,SMDJ45C,SMDJ33CA,SMDJ45A,1.5SMC8.2CA,SMAJ28,SMAJ24,SMAJ26,SMAJ20,SMAJ22,SMCJ13CA,SMDJ64CA,3KP13CA,5KP180CA,SMAJ17,LCE54A,SMAJ16,SMAJ19,SMAJ18,SMAJ13,SMAJ12,1.5KE62A,20KPA26A,SMAJ15,SMAJ14,SMAJ11,20KPA104CA,SMAJ10,1.5KE62C,SMCJ26CA,SA75A,20KPA24A,SA75C,1.5SMC91CA,SMDJ43A,SMDJ43C,1.5SMC180CA,1.5KE250C,20KPA300CA,1.5KE250A,1.5KE8.2C,SA78A,SA190C,SA78C,P4SMA200A,SMAJ85CA,SA190A,1.5KE8.2A,20KPA192A,1.5SMC300A,P6SMB180CA,P4SMA150CA,SMBJ90CA,20KPA28A,SMAJ110C,SMAJ110A,30KPA66CA,SMF6.0CA,P6SMB7.5A,5KP15,5KP16,5KP13,SMF48CA,5KP14,5KP11,5KP12,5KP10,P4KE10CA,P4KE18CA,1.5KE350CA,SMDJ40C,SMDJ40A,5KP24C,5KP24A,1.5SMC12A,SMAJ140CA,30KPA48CA,20KPA20A,SMBJ80C,1.5SMC11A,SMBJ80A,15KPA40A,1.5KE24CA,SMF78A,SMDJ110CA,P6SMB27A,LCE51A,1.5KE600C,1.5KE68C,P6KE500CA,1.5KE600A,1.5KE68A,SMBJ24CA,20KPA104A,SMBJ8.5,5KP26C,5KP26A,SMBJ8.0,SA18CA,SMAJ19CA,5.0SMDJ64CA,15KPA220A,1.5SMC13A,P6SMB8.2CA,15KPA17CA,SMF75A,1.5KE11CA,30KPA180A,15KPA43A,P6KE15CA,P6SMB24A,1.5SMC16A,SMCJ440A,15KPA70CA,5KP20C,5KP20A,1.5KE68CA

2019/3/27 - 硕凯电子 - 选型指南代理服务技术支持采购服务

【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。

2019-03-19 - 应用方案代理服务技术支持采购服务

【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。

2023-05-24 - 应用方案代理服务技术支持采购服务

【应用】6.5V反向关态电压的TVS SMBJ6.5A用于运放输入保护，具有高效能、响应速度快等优势

在设计电子产品时，需要设计相应的静电及浪涌防护电路，尤其是在产品的输入输出接口处防护器件必不可少。本文以一款传感器前端信号处理电路的输入防护为例，讲解电路的防护设计，选取的保护器件是硕凯电子的TVS—SMBJ6.5A，静电防护等级符合IEC-61000-4-2 空气放电15kV、接触放电 8kV，防护效果较好。

2020-01-15 - 应用方案代理服务技术支持采购服务