【技术大神】电驱控制瞬态防护利器——TVS二极管你选对没有？

时间： 2019-09-03 来源：技术大神活动文章

技术问答

电驱控制电路能够实现用微弱的数字信号控制高压大电流信号的功能，是连接数字控制电路与高能电路的纽带，是电子设备中的重要组成部分。瞬时过电压是电驱控制电路在实际工作环境中常常遇到的问题。轻则影响电路的正常工作，重则烧毁电路，造成进度及经济方面的损失。因此了解电驱控制电路瞬时过电压的应对方法及工程应用是非常必要的。

瞬态电压抑制二极管（TVS二极管）有着电压箝位相应速度快、可选范围广等特点，在电驱控制中应用广泛。

TVS二极管应用选择与工程案例
在TVS二极管极限参数的范围内，当其受到一个反向接入的瞬时过压脉冲时，能够将电压箝位到预期的数值，从而有效地保护电路使其在受到瞬时过电压冲击时免受损坏。加在TVS二极管的负向电压变化就会引起其工作状态的变化，了解这些特性对电驱控制的TVS应用帮助良多。

图1：TVS二极管特性曲线

如图1所示，V_BR为TVS二极管进入反向击穿状态的临界值。当负向电压大于V_BR时，管子进入击穿区，阻抗变低。V_CMAX为管子的最大箝位电压，数值通常为V_BR的1.3倍，在选择TVS二极管时必须要保证VCMAX不高于被保护电路的极限工作电压。V_RWM被称为最大反向工作电压，通常为V_BR的0.8倍，当TVS二极管的负向电压小于V_RWM时，管子为高阻抗电路，其上有较小的漏电流I_R。因此V_RWM必须大于电路的工作电压，以降低电路在正常工作状态时的功耗。

除此之外，在TVS二极管工程应用时，还需要根据实际电路中的具体需求选择合适的参数才能发挥其雪崩击穿特性和箝位特性，起到保护电路的作用。现通过实例介绍TVS管的应用参数选择。

图2：TVS二极管在电驱控制电路中的应用实例

如图2所示，电路中有两个TVS二极管用于保护电路。介绍电路的具体需求并进行TVS参数选取：
1）输入接口送入的数字控制信号为3.3V TTL电平方波，器件N2的极限工作电压为12V。工作电压为3.3V，若选取最大反向工作电压V_RWM为4V，则击穿电压V_BR=V_RWM/0.8=5V，根据击穿电压V_BR选取最大箝位电压V_CMAX=1.3*V_BR=1.3*5=6.5V。

2）场效应管Q2的漏极电压为28V，驱动输出电流为8A。由于Q2漏极的极限工作电压高于驱动输出后级的极限工作电压，在Q2漏极出现电压过冲情况时会将驱动输出的峰值电压拉高，超过驱动电路后级的极限工作电压，烧毁后级电路。因此瞬时输出电压的幅度，应小于驱动输出后级电路的极限值。

工作电压为28V，若选取最大反向工作电压V_RWM为30V，则击穿电压V_BR=V_RWM/0.8=37.5V；由击穿电压V_BR选取最大箝位电压V_CMAX=1.3*V_BR=1.3*37.5=48.75V。

在电驱控制电路的驱动端进行保护时，还需要考虑承受功率的因素。TVS二极管允许通过的最大脉冲峰值电流I_PP与最大箝位电压V_CMAX的乘积就是最大脉冲峰值功率，管子的反向脉冲峰值功率PPM不能超过这个极限值。PPM与过压脉冲的脉冲宽度，环境温度等因素有关，在期间选型时应留有足够的余量。根据箝位电压和最大峰值电流得出V_PR=V_C*I_R=49×8=392W。

得到了电路需要的参数，我们根据参数选择TVS二极管。LITTELFUSE公司的P6SMB系列TVS二极管拥有出色的箝位能力，增量浪涌电阻较低；从0V至V_BR最小值的响应时间迅速，通常小于1.0ps；还具有封装尺寸小等优势，非常适合电驱控制电路瞬态防护的应用，因此成了笔者设计的囊中之物。

P6SMB系列能够提供专业且种类齐全的TVS二极管，我们可以根据实际应用参数选取合适的产品。在P6SMB系列产品中可以查到P6SMB6.8A最大反向工作电压为V_RWM=5.8V，击穿电压V_BR小于7.14V，最大箝位电压V_CMAX=10.5V，可以满足电路图中D1的使用要求；P6SMB36A最大法相工作电压为30.8V，击穿电压V_BR为37.8V，最大箝位电压V_CMAX=49.9V。同时根据降额设计的原则，P6SMB系列最大脉冲峰值功率为600W，远大于392W，留有较大的余量可以满足D2的使用要求。电路工作稳定可靠，未出现过电压影响电路正常工作的情况。

小结
P6SMB系列TVS二极管能够提供有效的瞬时过电压保护，减小电路损坏概率，提高电子设备的可靠性，是电驱控制电路的瞬态防护利器。

作者：两星镶月

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用户48282835 Lv4. 资深工程师 2020-02-14

学习了
song Lv8 2019-04-17

学习了
笨鸟先飞 Lv7. 资深专家 2018-11-15

学习
时不我待 Lv7. 资深专家 2018-11-14

深有体会，不错
Billion Lv2. 工程师 2017-12-04

格雷柏电子公司提供ES621系列动态电流电压曲线传输线脉冲测试系统（ES621 SeriesDynamic IV-CurveTLPSystem）----TLP or Vf-TLP 是一款先进的便携式脉冲IV-曲线特性表征系统，用于模拟静电放电脉冲事件，例如 TLP, vf-TLP, HMM, HBM, EFT, 和低压浪涌。系统会检测脉冲期间皮秒或纳秒级的瞬态电压和电流波形，并测试脉冲前、后被测器件的状态（漏电流，击穿电压，偏置电流，静态IV曲线，等）。可测的DUT包括静电防护器件，半导体，

海绵宝宝 Lv7. 资深专家 2017-11-07

写得很用心
秦王殿下 Lv4. 资深工程师 2017-07-24

还不错啊

没有更多评论了

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目录- 过压抑制应用瞬态电压场景典型应用 FIT计算方法&钳位波形选择清单&术语/定义&免责声明表面贴装型TVS 轴向引线型TVS

型号- LCE9.0A,1.5SMC540CA,SMCJ36CA,SA13CA,P4SMA16A,SMAJ6.0CA,30KPA45A,5KPXXX,SMAJ40CA,SMDJ12A,SMDJ43CA,SMBJ51A,5KP200A,30KPA170CA,P6SMB56A,LCE22A,SMDJ13A,20KPA26CA,P6KE22A,5.0SMDJ170A,P6KE24A,SMDJ78CA,SMDJ11A,30KPA280A,SMF26A,1.5SMC13CA,SA43A,SMCJ14CA,P4KE13CA,5KP75A,SMCJ78A,30KPA300CA,P4SMA530CA,P4SMA18A,SMDJ10A,P6KE18CA,5.0SMDJ85A,5KP78A,AK10-530C,LCE24A,P4SMA16CA,SMCJ100CA,30KPA48A,20KPA48CA,5KP,5KP28CA,P6KE20A,SMBJ300A,5KP30A,SMBJ150CA,1.5KE150A,P4SMA91CA,SMDJ170A,30KPA45CA,SMAJ70A,SA7.0CA,SMAJ75CA,AK3 - 430C,1KSMB9.1A,SMF24A,SMA6L9.0A,SMBJ16CA,SMA6JXXA,3.0SMC30A,SMA6JXXX,SMDJ58A,P6SMB170CA,SA45A,1.5KE220CA,SA48CA,SMCJ30A,P6KE540A,3KP36CA,5.0SMDJ12CA,P6KE27A,SA180A,P6SMB51A,1KSMB160CA,SMA6J5.0A,SA40A,RS232,SMCJ75A,SMA6L40A,SA22CA,P6KEXXXXXX,P6KE8.2CA,1KSMB27A,SMAJ100A,P4SMA300A,SMF22A,3KP100CA,30KPA42A,SMDJ30CA,P6SMB250A,P4SMA160CA,1.5SMC400A,1KSMB130A,P4KE130CA,P4KE180A,5.0SMDJ170CA,SA110CA,30KPA54CA,P4SMA82CA,P4KE250CA,15KPA75CA,30KPA150A,SMDJ54A,30KPA43A,3.0SMC33A,30KPA198A,AK6-170C,SMDJ160CA,1.5KE7.5A,20KPA180A,3KP14CA,SMA6L85A,SMBJ400CA,P6SMB120A,LCE20A,P6SMB51CA,3KP220CA,P4KE22CA,1.5SMC300CA,AK3-058C,P6SMB300CA,SMCJ220CA,SMF20A,15KPA40CA,1.5SMC530A,P6SMB8.2A,15KPA70A,5KP15CA,1.5KE51A,1KSMB30CA,P6KE100A,1.5SMC39CA,P4SMA56A,P6SMB,V33ZA70PX,P6SMB540CA,1.5KE36CA,SA70CA,SLD,15KPA75A,P6KE36CA,15KPA100A,5KP36A,P6SMB16A,P6SMB300A,20KPA280CA,1KSMB22A,30KPA,5KP200CA,1KSMB43CA,5.0SMDJ130A,SMAJ18CA,SA17CA,1.5KE170CA,20KPA56A,5KP90CA,3KP24A,SMF,SMDJ51A,3KP45CA,5KP190CA,P4SMA170A,04611.25ER,1.5SMC47A,P6SMB15A,SMAJ250CA,SMCJ18CA,P4SMA10A,3KP58CA,1.5KE56A,20KPA160CA,3KP190A,5.0SMDJ30CA,1.5SMC440A,SMDJ120CA,P6SMB91CA,AK10 - 170C,1.5SMC170CA,LCE64A,P4SMA12CA,SA5.0CA,1KSMB24A,P4SMA480CA,5KP24CA,P6SMB16CA,P4SMA11A,3KP22A,SMBJ90A,SMBJ12CA,P4KE530A,SAC8.0,P6SMB13A,SMAJ130CA,SMBJ350CA,SMCJ70A,SAC8.5,SMBJ5.0A,SA48A,P4SMA12A,P4KE39CA,1.5SMC220A,SMCJ100A,P6SMB12A,1.5KE10A,20KPA52A,P4SMA13A,AK6 - 430C,P6KE180CA,P6KE510CA,SMBJ2SCA,P6SMB10A,3KP28A,3.0SMCXXA,5KP7.5CA,1KSMB170A,P4SMA47CA,P6SMB11A,SLD28-018,1KSMB56CA,SMDJ5.0A,SA26CA,30KPA58CA,P6SMB100CA,5.0SMDJ78CA,3KP10CA,1.5KE12A,15KPA18CA,15KPAXXX,P4KE400A,AK15 - 058C,P6SMB58A,SMBJ170A,1.5KE10CA,AK3 - 030C,LCE60A,1KSMB68A,1KSMB20A,P4KEXXXXX,5.0SMDJ43CA,P4SMA15A,1.5KE11A,P6KE,30KPA144CA,15KPA30A,3KP26A,SMA6L5.0A,SMDJ12CA,15KPA78A,30KPA84A,P6KE27CA,5KP33A,P6SMB82CA,15KPA180CA,AK3 - 380C,1KSMB6.8CA,5KP11CA,30KPA36CA,SMBJ5.0CA,20KPA52CA,P4KE6.8CA,P6SMB47CA,SA150CA,1.5SMC250CA,P4SMA480A,P6SMB220CA,SLD17-018,1.5KE540A,1KSMB62A,SMCJ85CA,15KPA26CA,P4SMA130A,15KPA24A,30KPA90A,3KP64A,AK3 - 076C,SLD33-018,P4KE20A,1.5SMC51A,SMBJ78CA,20KPA60A,P4KE68A,SMAJ48CA,SMBJ43CA,5KP33CA,AK15 - 066C,1KSMBXXXXX,P6KEXXXXX-B,SMCJ7.5A,SMAJ400A,SLD36U-017,30KPA71CA,P4SMAXXXXX,SA90A,SMCJ110A,15KPA110CA,30KPA102A,5KP20CA,SMBJ18A,20KPA132A,SA75CA,P4KE62CA,1.5SMC75CA,SMCJ8.5CA,LCEXXXXX-B,P6SMB12CA,SMAJ300CA,3KP6.5A,P6KE220CA,SA40CA,SLD20U-017,P4SMA30CA,1.5KE27CA,15KPA22A,SACXXXX,SMAJ26CA,5KP160A,1KSMB13CA,SACXXXXX,1.5SMC6.8A,20KPA96CA,SLD16U-017,3KP9.0CA,1.5KE510CA,SMAJ-XXXXX,P6KE100CA,P6KE22CA,SMBJ16A,20KPA240CA,SMBJ30CA,1.5SMC56A,5KP28A,SMAJ36A,30KPA108A,P4SMA51A,3KP20A,15KPA28A,SMAJ8.5CA,SMAJ180A,SMBJ440CA,P4KE100A,1.5KE130CA,P4SMA43CA,SMBJ17A,SMBJ120CA,20KPA120CA,5KP8.0A,1.5SMC10A,5KP250A,15KPAXXXXXX,3KP75CA,5KP64CA,SMBJ14A,P6SMB18A,P4SMA56CA,SMAJ13CA,SMDJ16CA,SMBJ130A,1.5SMC130CA,15KPA26A,15KPA48CA,5.0SMDJ36A,AK6-430C,P4KE530CA,P4KE62A,3KP40CA,5KP120CA,SA100A,SMBJ15A,P6KE180A,SMAJ170CA,AK6 - 380C,P4SMA440A,SMBJ9.0A,20KPA56CA,15KPA180A,SMA6L43A,30KPA260CA,SMBJ12A,SMF7.5A,30KPA144A,SMAJ6.0A,P6KE62CA,5.0SMDJ100CA,SMBJ350A,3KP100A,1.5SMC91A,AK6 - 030C,SA7.5CA,SMDJ120A,1KSMB39CA,SMCJ300CA,5.0SMDJ78A,1.5SMCXXXXX,SMCJ7.0A,SMDJ51CA,15KPA22CA,5.0SMDJ30A,5.0SMDJ48CA,SMBJ13A,SACB5.0,1.5KE62CA,SLD15-018,P6SMB43CA,SMCJ170CA,P6KE75A,SMAJ33A,SMCJ54CA,P4SMA220A,30KPA75CA,P4KE480CA,AK3-015C,1.5SMC22CA,AK10 - 430C,5.0SMDJ33A,SMCJ150A,20KPA172A,P6KE6.8A,SMBJ58A,1.5KEXXXXX,5KP70A,SA6.0A,P6SMB30CA,5KP8.5A,SMAJ78A,SLD13U-017,SMAJ30A,5KP120A,5.0SMDJ26CA,SMBJ10A,SMDJ18A,SMBJ11A,5KP51CA,P4KE27A,SMAJ22CA,SMBJ220A,SMCJ6.5CA,SMAJ75A,SMCJ36A,SMAJ100CA,SMDJ60CA,5.0SMDJ75A,LCE26A,P4SMA9.1A,SMDJ17A,SMBJ7.5CA,P4SMA91A,1.5KE100A,P6SMB170A,P6KE30A,3KPXXXXXX,SMCJ45CA,3KP60A,1.5SMC180A,30KPA84CA,SMA6L48A,SMF7.0A,P6KE75CA,P4KE24A,3KP180CA,SMDJ16A,AK10-058C,SMAJ6.5A,SMBJ440A,20KPA30CA,SMCJ10CA,P6KEXXX,SMCJ58CA,SMDJ7.5CA,3KP18CA,SMA6L45A,SMAJ6.5CA,SMBJ200CA,LCE28A,5KP210A,5.0SMDJ17CA,1.5KE18CA,SMDJXXXXX-T7,5KP60CA,P4KE160CA,SMDJ15A,5.0SMDJ70CA,1.5KE320A,SMCJ33A,1.5KE8.2CA,P4SMA350A,P6SMB56CA,AK6 - 076C,P4KE22A,SMBJ54A,P4SMA6.8CA,SMF28A,SMDJ14A,SMDJ8.5A,30KPA216CA,1KSMB130CA,P4KE75CA,P4KE6.8A,1.5KE91A,SA6.5A,5.0SMDJ33CA,SA36CA,AK3-150C,SMBJ,P4SMA9.1CA,P6KE170CA,SMDJ20CA,15KPA30CA,SMF6.0A,15KPA170CA,P4SMA15CA,1.5KE160A,LCE58A,P6SMB68A,SMA6L8.5A,LCE10A,P6SMB110A,30KPA58A,1KSMB9.1CA,P4SMA7.5CA,SMAJ7.5A,3KP6.0CA,5KP64A,SMDJ160A,3KP26CA,SMAJ60A,SMAJ,P4SMA510A,P6KE36A,SMBJ40A,5.0SMDJ70A,1.5KE550CA,LCE11A,SMDJ48A,1.5KE20CA,1KSMB7.5CA,SMCJ7.0CA,SMCJ20A,P4KE3

选型指南 - LITTELFUSE PDF 中文下载

AQxx-02HTG Series 500W TVS Diode Array Datasheet

型号- AQ36-02HTG,AQXX-02HTG SERIES,AQ05-02HTG,AQXX-02HTG,AQ15-02HTG,AQXX–02HTG,AQ12-02HTG,AQ24-02HTG

数据手册 - LITTELFUSE - 05/24/23 PDF 英文下载查看更多版本

Littelfuse（力特）应用于汽车市场的电路保护器件选型指南

目录- Electrical Threats and New Automotive Technologies Introduction Automotive Applications in Modern Vehicles Circuit Protection device for Automotive Application Selection table Circuit Protection device for Automotive Application Selection Guide

型号- VXXE14AUTO,S8025XXXP,10EV,DST10XXXS-A,VXXE30AUTO,TPSMF4L,AXGD10603,501A,AQ3130,SM24CANB-02HTG,AQ05C,30KPA,LR4-XXXF,SRPXXXF,V30MLAXXXXNHAUTO,527 SERIES,AQ24CANFD,MICROASMD0XXF,AQ3400-02UTG,V18AUMLAXXXX,PICOASMDC0XXS,881A,AHRFXXX,AQ1003-01ETG,NANOASMDC0XXF,AQ24CANA-02HTG,885 SERIES,AQ2555NUTG,SZ1SM,LSP380,DST15XXS-A,V20HXXXAUTO,0438XXX.WRA,AQ3118,AQ24CANA,526 SERIES,VXXE25AUTO,FEMTOASMDC0XXF,MIDI70V,AHEFXXX,V20PXXXAUTO,DST5XXXS-A,P6SMB510CA,AQ15C-01FTG,20EV,AQ24CAN,SESD1004Q4UG-0020-090,AGRFXXX,AQ24CANFD-02HTG,TPSMA6L,0441XXX.WRA,0881XXXUR,440A,ASMDCXXXF,S8016NAXP,SZNS6A,SZ1SMB,SZ1SMC,AQ4022,AXGD10402,0440XXX.WRA,HS4040XAQX,TP5KP,V48MLAXXXXNHAUTO,AQ1005-01ETG,V24AUMLAXXXX,IXD_6XXSI,MINIASMDCXXXF,NG SERIES,V16AUMLA2220NS,P6KE510CA,441A,ASMDXXXF,SZ1.5SMC,VXXE17AUTO,V48AUMLAXXXX,437A,0437AXXX.WRA,V18MLAXXXXNHAUTO,AQ3045,SP3213,TP1.5KE,SZP6SMB,AQ3045-01ETG,SESD0402X1BN-0010-098,SP3012-04UTG,38EV,HCRTP-MINI,V16AUMLA2220H,TP6KE,438A,SLD8S,V120MLAXXXXNHAUTO,30EV,521 SERIES,V14HXXXAUTO,IX4340NE,V14PXXXAUTO,SZSMF,0HEV,SHEV,AHSXXX-2,AQ1005,0885XXXDR,SJ6025XXXP,TPSMC,V3.5MLAXXXXNHAUTO,TPSMB,TPSMD,0501XXX.WRA,AQ24C-01FTG,MEGA70V,VXXE45AUTO,SM24CANA-02HTG,DST8XXXS-A

选型指南 - LITTELFUSE - v0720 - 2020/9/2 PDF 英文下载

Littelfuse力特TVS二极管/TVS二极管阵列，提供kA级高电流保护

Littelfuse力特TVS二极管增量浪涌电阻较低，提供单双向极性，反向断态电压和峰值额定功率范围宽，提供高电流保护。Littelfuse力特TVS二极管阵列提供广泛的工业标准分离或多通道贴片包装，这些特性组合起来，使其寄生电容减小到0.4pF，而ESD性能高达±30kV。世强是Littelfuse力特代理商，可供应Littelfuse力特TVS二极管/TVS阵列，价格优惠，库存丰富。

原厂动态发布时间 : 2018-10-01

SC1103C-01UTG 80A Discrete Bidirectional TVS Diode, Lightning Surge Protection TVS Diode Arrays (SPA® Diodes) Datasheet

型号- SC1103C,SC1103C-01UTG

数据手册 - LITTELFUSE - 11/25/21 PDF 英文下载

P6SMB series TVS Diodes Surface Mount-600W

型号- P6SMB600CA,P6SMB,P6SMB24CA,P6SMB47CA,P6SMB160CA,P6SMB540CA,P6SMB43A,P6SMB220CA,P6SMB68A,P6SMB56A,P6SMB150A,P6SMB16A,P6SMB110A,P6SMB300A,P6SMB530A,P6SMBXXXXX,P6SMB110CA,P6SMB36CA,P6SMB13CA,P6SMB SERIES,P6SMB82A,P6SMB9.1A,P6SMB30A,P6SMB250CA,P6SMB39A,P6SMB27A,P6SMB15A,P6SMB20CA,P6SMB43CA,P6SMB62CA,P6SMB27CA,P6SMB91CA,P6SMB200CA,P6SMB100A,P6SMB30CA,P6SMB180A,P6SMB16CA,P6SMB39CA,P6SMB12CA,P6SMB58CA,P6SMB400CA,P6SMB600A,P6SMB13A,P6SMB480CA,P6SMB220A,P6SMB510CA,P6SMB8.2CA,P6SMB170CA,P6SMB350CA,P6SMB68CA,P6SMB22CA,P6SMB120CA,P6SMB510A,P6SMB91A,P6SMB75A,P6SMB51A,P6SMB36A,P6SMB130A,P6SMB24A,P6SMB12A,P6SMB550A,P6SMB75CA,P6SMB10CA,P6SMB170A,P6SMB15CA,P6SMB9.1CA,P6SMB11CA,P6SMB150CA,P6SMB530CA,P6SMB400A,P6SMB10A,P6SMB62A,P6SMB47A,P6SMB250A,P6SMB480A,P6SMB11A,P6SMB440A,P6SMB7.5CA,P6SMB100CA,P6SMB6.8CA,P6SMB58A,P6SMB120A,P6SMB22A,P6SMB350A,P6SMB18A,P6SMB540A,P6SMB180CA,P6SMB51CA,P6SMB160A,P6SMB18CA,P6SMB6.8A,P6SMB130CA,P6SMB33CA,P6SMB56CA,P6SMB300CA,P6SMB550CA,P6SMB7.5A,P6SMB20A,P6SMB8.2A,P6SMB82CA,P6SMB33A,P6SMB440CA,P6SMB200A

数据手册 - LITTELFUSE - 06/28/21 PDF 英文下载

Littelfuse（力特） SLD TVS二极管数据手册

型号- SLD16U-017,SLD18-018,SLD43-018,SLD26-018,SLD,SLD33U-017,SLDXXU-017X,SLD17-018,SLD17U-017,SLD24U-017,SLD40U-017,SLD51-018,SLD10U-017,SLDXXXXX,SLD60-018,SLD16-018,SLD33-018,SLD43U-017,SLD51U-017,SLD54U-017,SLD20-018,SLD14U-017,SLD11U-017,SLD58-018,SLD28-018,SLD15-018,SLD14-018,SLDXXXX-B,SLD45-018,SLD30-018,SLD13-018,SLD36U-017,SLD22-018,SLD22U-017,SLD48-018,SLD30U-017,SLD12-018,SLD60U-017,SLD28U-017,SLD13U-017,SLD58U-017,SLD24-018,SLD11-018,SLD12U-017,SLD20U-017,SLD54-018,SLD48U-017,SLD40-018,SLD18U-017,SLD15U-017,SLD45U-017,SLD10-018,SLD36-018,SLD26U-017

数据手册 - LITTELFUSE - Revised: 09/10/16 - 2016年09月10日 PDF 英文下载