【技术浅谈】TVS的选型计算你做对了吗?(续)
俗话说“书接上回”详见【技术浅谈】TVS的选型计算你做对了吗?,那么再写个续集吧!
细心的朋友可能会发现,上一篇写的计算方法针对的是单次的浪涌,比如Surge test一般两次浪涌之间会有30~60s的间隔时间,这意味着TVS有足够的时间去把吸收的浪涌能量给耗散掉,不会因为热累积而导致TVS温度过高而损坏。
但是,现实中还有一些情况是会有重复浪涌的。比如下图,MOSFET作为低边开关来控制感性负载L,MOSFET会由PWM控制进行周期性的开关,每次关断(turn off)时,L都会因为反向的感应电动式E而产生一个尖峰电压Vspike。
Vspike = L×di/dt (L大; Ipeak大;t小 -->Vspike大)
此时MOSFET的 Vds需要承受12 V+Vspike的电压,如果Vspike很高的话是有可能会损坏MOSFET的,这时候TVS就有它的用武之地了。
下图这个示例中,MOSFET的Vds=100V,考虑10%的裕量,TVS的Vc需要<100×90%=90V以保护MOSFET。
OK, 那么在这种重复浪涌的应用中,如果选用TVS做保护,选型和计算时需要如何来考虑呢?一起来看看吧!
1. 平均功率PAVG的计算
这里我们可以先假设TVS吸收了所有L存储的能量(这是worst case情况,实际上L,R, diode,TVS都会吸收L所存储的能量,做这个假设是为了方便计算)。
电感量:L=50mH
峰值电流:Ipeak=V/R =12/24 =0.5A
频率:f=100Hz
PAVG=1/2 × L x Ipeak^2 × f=1/2 x 50 mH x 0.5^2 x100 =0.625W
这个结果有什么意义呢?请接着往下看。
2. TVS结温Tj的计算
TVS的SPEC中会有Tj(max)这个参数,绝大多数情况下,只要计算得到的Tj<Tj(max),我们就可以认为TVS是安全的,不会损坏。
参考下图,取热阻系数Rth(j-a):
这里取焊盘面积Scu=0.5cm^2,可以得到 Rth(j-a)=92℃/W
Tj=Tamb+PAVG×Rth(j-a) =85+0.625×92=142.5℃
参考SMBJ系列TVS的SPEC:
Tj=142.5℃<Tj(max) =150℃
So,这颗SMBJ/600W的TVS,从平均功率PAVG的角度来说选型是OK的。
3. 确定TVS的VBR
这里需要强调的一点是,在重复浪涌的应用中,首先应该考虑尽量减小Ipeak,也就是流经TVS的电流Ipp。因为如果还是像单次浪涌那样,以Ppp=Ipp×Vc作为评估的标准,那么重复浪涌会造成短时间内的能量累积,TVS无法有效地耗散这些能量,从而导致Tj温度急剧上升而损坏。
根据经验,建议Ipp<1A,参考下图,此时Vc≈VBR。
这个案例中需要选择VBR(max)<90V的TVS, 参考下表SMBJ70A的VBR(max)=86.0V, 可以满足要求。
计算到这里基本上也就差不多了,如果还有兴趣可以做一下温度校正,公式如下:
Vc(Tj)=Vc(25°C) ×(1+αT×(Tj −25°C))
αT=0.105%/℃ (查SPEC得到)
Vc(25℃)=86.0V
Tj=142.5℃
Vc(Tj=142.5℃) = 86×(1+0.105%×(142.5-25))= 96.6V<Vds=100V
综上所述,SMBJ70A可以满足本次的选型需求。
最后,我想说,其实在重复浪涌的应用中,还有许多值得探讨的地方。比如RCD的snubber电路、压敏电阻MOV等都是可以考虑的保护方案,这篇文章只是起一个抛砖引玉的作用,欢迎交流!
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型号- SMCG85A-HRA,SMDJ70CA-HCA,SMCJ120A-HR,SMCJ60CA-HRA,SMCG17A-HR,SMCJ51CA-HR,SMBJ30A-HCA,5.0SMDJ75A-001T7,SMCJ120CA-HC,SMDJ7.0A-HCA,SMCJ51CA-HC,SMAJ45CA-HR,SMCJ170A-HRA,SMCJ170CA-HC,SMBJ9.0A-Q,SMCJ17A-001T13,TPSMB30CA,SMAJ45A-HRA,SMAJ18CA-HRA,SMCJ120A-HC,SMDJ18A-HCA,TPSMB7.0A-VR,SMCJ150A-HRAT7,SMCJ170CA-HR,SMDJ18CA-Q,SMAJ48C-001T13,SMCJ51A-HRA,SMDJ48A-HRAT7,SMDJ11A-HCA,SMAJ43A-1000,TPSMB130A,SMDJ63A-1000,SMCJ43CA-HCA1,SMAJ180C-001T13,SMCJ6.0CA-HR,SMCJ120A-HRA,SMBLCE30-HCA,SMAJ100CA-001,SMCJ120CA-HR,SMCJ90CA-HRAT7,SMCJ6.0A-HRA,SMCJ6.0CA-HC,SMBJ48A-HRA,SMBJ11CA-001T13,SMBJ40-001,SMDJ26A-HRAT7,SMAJ250A-001,5.0SMDJ40CA-001T13,SMDJ33CA-HRAT7,SMAJ7.5A-001,SMDJ54A-HCA1,SMDJ150A-HR,TPSMC188A-VR,TPSMC33A-VR,SMDJ54CA-HR,SMCG26A-HR,SMCJ14CA-HRA,SMCJ33A-HCA,SMDJ5.0CA-001T13,TPSMC120CA-VR,SMAJ20CA-HR,SMDJ54CA-HC,SMBLCE16-HRA,SMDJ40A-001,SMAJ70C-001T13,SMBJ8.5CA-HR,SMDJ36CA-HR,5.0SMDJ15A-001T7,SMCJ90A-HRAT7,SMCJ43CA-HRAT7,5.0SMDJ16CA-001T7,SMBJ85A-HR,SMBJ54-001T13,TPSMB64CA-VR,SMAJ400-001,SMDJ24CA-HCA,SMDJ54A-001T13,SMAJ70-001,SMBJ8.5CA-HC,SMDJ36CA-HC,TPSMB36A-VR,SMAJ250CA-001T13,TPSMB250A-VR,5.0SMDJ100A-001T7,SMBJ8.5A-HRA,SMBJ16-001T13,5.0SMDJ26A-001T7,TPSMB54A-VR,SMDJ75CA-HCA,SMAJ18A-001T13,SMAJ22C-001,SMAJ150A-001T13,SMDJ43CA-1000,SMBJ16A-1000,5.0SMDJ64A-001T7,SMBJ5.0A-001,SMDJ9.0CA-HCA1,5.0SMDJ43A-1000,SMDJ54A-HRA,TPSMB43CA,SMBJ20CA-1000,SMAJ40A-001T13,SMBJ22-001,SMBJ20A-HR,SMCJ58CA-HC,TPSMB110CA,SMCJ28CA-001T13,TPSMB250A-UA,SMCJ58A-HRA,5.0SMDJ22A-001T13,SMCJ64A-001T13,SMDJ28C-001T13,SMAJ78CA-001,SMAJ8.0C-001,SMBJ20A-1000,SMBJ28CA-HCA,SMCJ58CA-HR,SMBJ20A-HC,SMDJ26A-001T13,SMDJ14CA-001,SMDJ75A-HRAT7,SMCJ8.5CA-001T13,SMAJ9.0CA-001T13,SMDJ15A-001,SMAJ13CA-HR,SMCJ90A-HCA,SMBJ17-001,SMBJ170CA-001,SMAJ43-001,SMBJ7.0A-HCA1,SMDJ36A-HCA,SMBJ36A-001T13,SMAJ12A-001T13,SMCJ6.5A-001T13,SMDJ33CA-HRA,SMBJ12A-HCA,SMBJ6.0A-HC1,SMBJ51C-001T13,SMDJ22A-HRA,SMAJ22CA-001,SMCJ30A-HRAT7,5.0SMDJ160A-001T7,SMCJ7.5A-001T13,SMBJ30A-001T13,SMDJ6.0A-HC,TPSMB14CA-VR,SMBJ6.0A-HCA,SMBJ64C-001,SMBLCE16-HCA,SMBJ11A-HCA1,SMBJ30CA-001T13,SMCJ160CA-HRAT7,SMDJ12A-HCA1,SMBLCE70-HR,SMBJ110A-001,SMBJ48CA-HR,SMCJ110CA-001,SMBJ15A-HC,SMDJ43A-HCA,SMDJ45A-001T13,SMBJ58A-HC,SMBJ36A-HRAT7,SMBLCE70-HC,SMCJ7.0A-HCA1,5.0SMDJ28A-001T13,SMCJ51CA-HRA,SMCG6.5CA-HRA,SMBJ58A-HR,SMDJ16CA-001T13,SMDJ9.0CA-HRAT7,SMCJ45A-001T13,SMDJ120A-001,SMBJ15A-HR,SMDJ15A-HRAT7,SMDJ6.0A-HR,SMBJ48CA-HC,TPSMD15CA-PL,SMCG90CA-HRA,SMCJ15CA-HRAT7,SMAJ36A-HR,TPSMD17CA,SMAJ160CA-001T13,SMCJ26A-001,SMBJ8.5-001T13,5.0SMDJ130A-001T13,SMCJ20A-001T13,TPSMD70CA,SMAJ64CA-001,SMAJ48A-1000,5.0SMDJ12CA-001T13,SMBLCE45-HR,SMDJ22CA-HR,SMDJ7.5CA-HCA1,SMCG28A-HRA,SMAJ200A-001,SMBLCE45-HC,SMCG6.0CA-HRA,SMDJ22CA-HC,SMDJ170A-001,SMCG28CA-HR,SMAJ36C-001,SMCJ170CA-001,SMAJ13A-HRA,SMAJ160A-001,TPSMC28A-VR,TPSMC200A,SMAJ54C-001,SMDJ130A-HCA,SMAJ48CA-1000,SMDJ64A-HRAT7,TPSMC150A-VR,SMAJ51CA-001T13,SMDJ12C-001T13,SMBJ16A-001,SMCJ100A-001T13,SMCG9.0A-HRA,SMCJ28CA-001,SMBJ110-001,SMCG9.0CA-HR,SMCG30CA-HRA,SMDJ58CA-HRAT7,SMAJ160CA-001,SMBJ30A-HRAT7,5.0SMDJ60A-001T13,SMCJ51A-001,TPSMB200CA-VR,SMCJ51A-HC,TP5.0SMDJ150A,SMBJ70C-001T13,SMAJ11C-001,SMBJ200A-JD,SMDJ18A-HRA,SMCJ51A-HR,SMDJ9.0CA-HCA,SMCJ180CA-HRA,SMAJ110A-001,SMDJ6.0A-HCA1,SMDJ10CA-HCA,SMBJ5.0A-HRA,SMBJ28CA-HRA,TPSMB27A,SMBJ30A-HRA,SMCG8.0A-HR,SMCJ6.0A-HCA,TPSMB250CA-VR,SMDJ70CA-HRA,8.0SMDJ40A-1000,TPSMB91CA,SMAJ440CA-001T13,SMBJ17A-001T13,SMAJ13CA-001T13,TPSMB24A,SMBJ48A-HCA,SMDJ18CA-HR,SMCJ12A-HRA,SMCJ33CA-HCA,SMAJ20CA-1000,SMBJ14CA-HCA,SMBJ8.5A-HCA,SMCG22A-HR,SMBJ150C-001T13,SMDJ6.5A-HCA1,SMAJ24A-001,SMDJ18CA-HC,SMCJ170A-HCA,TPSMB200CA-UA,SMBJ5.0CA-HC,SMCJ14CA-001,SMBJ8.5A-HC1,SMCJ8.5A-001,SMAJ15C-001,TPSMB8.5CA-VR,SMAJ14C-001T13,SMDJ130CA-HRAT7,SMAJ18C-001,SMBJ8.0C-001,SMAJ18CA-001,SMAJ130C-001,SMBJ5.0CA-HR,TPSMC85A-VR,SMAJ170CA-001T13,8.0SMDJ45A-1000,SMDJ90A-HRAT7,TPSMB22A,SMBJ14C-001,TPSMC15A-VR,SMCJ120A-HCA,SMCJ60A-HC,SMBLCE54-HR,SMAJ8.5-001,SMCG160CA-HRA,SMCJ26A-HRAT7,SMDJ6.0A-001,SMBJ16A-HCA1,SMAJ180C-001,SMDJ54A-001,SMCJ60A-HR,SMDJ70CA-1000,SMBJ130-001T13,SMBLCE54-HC,SMCJ58A-001,SMDJ17A-001T13,SMBJ6.5A-HR,TPSMC56A,SMDJ54CA-001T13,TPSMD43A-T7,SMBJ24A-HC,SMBJ30CA-HC,SMCG58CA-HRA,SMBJ160C-001T13,SMDJ11CA-HR,SMBJ160A-001,SMBJ26-001,SMBJ43C-001,SMCJ30A-1000,5.0SMDJ13A-001T13,SMDJ11A-HRA,SMDJ14CA-HRAT7,SMBJ6.5A-HC,SMDJ11CA-HC,TPSMC27CA,SMBJ24A-HR,SMBJ30CA-HR,SMBJ10-001T13,SMBJ7.5-001T13,SMDJ24CA-HRA,TPSMB20A,SMAJ33C-001T13,SMAJ220-001,SMAJ54-001T13,SMDJ30A-HC,SMBJ60CA-HCA,SMDJ30A-HR,5.0SMDJ30CA-001T13,SMCJ15A-HRAT7,SMDJ51CA-HRA,SMBJ8.5CA-HCA1,SMCJ33A-HRA,SMCG78A-HRA,TPSMB250CA-UA,SMCJ33CA-HR,SMAJ5.0CA-001,SMAJ8.5-001T13,SMCJ48A-HRAT7,8.0SMDJ22CA-1000,SMAJ45A-001,SMCJ70CA-HCA1,SMCJ75CA-001T13,SMDJ75CA-HRA,SMCG78CA-HR,SMBJ5.0CA-HRA,SMCJ33CA-HC,TPSMC60A-VR,TPSMB58A-VR,SMBLCE30-HC,SMDJ15CA-HR,SMCG78A-HR,TPSMC51A,SMDJ43A-HC,TPSMC11CA-VR,SMDJ22A-HCA,TPSMB43CA-VR,SMBJ15CA-HRAT7,SMDJ170A-HRA,SMBLCE30-HR,SMDJ15CA-HC,TPSMC90CA-VR,SMBJ8.0A-001T13,SMCJ54A-001T13,SMDJ120CA-HR,SMDJ43A-HR,SMCJ33A-HR,TPSMD85A,SMBJ60CA-HRA,SMDJ40A-HCA1,SMBJ13-001,SMBJ43-001T13,SMCJ110CA-HRA,SMCJ40
LITTELFUSE SMBJ-HRA系列瞬态抑制二极管选型表
反向隔离电压:3.3V至600V 峰值脉冲额定功率:200W至30KW 可提供高电流保护,峰值脉冲电流:8/20 1kA、3kA、6kA、10kA、15kA至20kA
产品型号
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品类
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厂牌
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Reverse Stand off Voltage V-R (Volts)
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Breakdown Voltage V-BR (Volts) @ I-T MIN
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Breakdown Voltage V-BR (Volts) @ I-T MAX
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Test Current I-T (mA)
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Maximum Clamping Voltage V-C @ I-PP (V)
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Maximum Peak Pulse Current I-PP (A)
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Maximum Reverse Leakage I-R @ V-R (µA)
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SMBJ5.0A-HRA
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TVS Diode
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LITTELFUSE
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5
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6.4
|
7
|
10
|
9.2
|
65.3
|
800
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选型表 - LITTELFUSE 立即选型
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描述- 本报告主要针对DO-214AA和DO-214AC封装的TVS STD产品进行第二片晶圆来源和额外EMC来源的认证。报告详细介绍了产品的物理、电气和可靠性测试结果,包括参数测试、可靠性测试和电学特性总结。测试结果显示,第二片晶圆来源和额外EMC来源均符合规格要求,并已通过认证,可用于生产。
型号- P4SMA16A,SMAJ6.0CA,1.5SMB39CA,SMAJ40CA,SMA6J78CA,1KSMB110A,SMBJ8.5CA,SMBJ51A,SMBJ45CA-SA-GT3,SMBJ75A,P6SMB56A,SMAJ60CA-N,SMBJ100CA-N,SMBJ8.0A-23-TR70,SMAJ48CA-23-TR70,SMBJ12CA-SA-GT3,SMAJ120A,SMAJ110CA,SMAJ51CA,SMBJ400A-37,P6SMB30A,SMBJ5.0A-012,P6SMB62CA,SMAJ250A,P4SMA,SMAJ350CA,P4SMA530CA,P4SMA8.2CA,SMAJ13CA-23-RG70,SMAJ64CA,1KSMB7.6A,P4SMA18A,SMA6J54CA,1KSMB8.2CA,SMA6J7.0A,SMAJ8.0A,P4SMA16CA,SMBJ8.5CA-KF,P6SMB100A,SMBJ48CA-23-TR70,SMBJ300A,SMBJ150CA,P4SMA91CA,SMAJ70A,SMBJ6.0CA-SA-GT3,SMAJ75CA,P6SMB400CA,SMA6J43CA,1KSMB9.1A,SMBJ15CA-KF,SMA6J40A,SMBJ16CA,SMA6J64A,SMBJ6.0CA-37,P4SMA27CA,P6SMB170CA,SMBJ120A-23-TR70,SMAJ10CA-23-TR70,SMBJ33A-T7,SMA6J45A,SMBJ7.5CA-23-TR70,P6SMB75A,P6SMB51A,1KSMB160CA,SMA6J5.0A,P6SMB75CA,SMBJ170CA,SMA6J22A,SMBJ16A-23-TR70,P6SMB9.1CA,SMAJ100A,1KSMB27A,1KSMB7.5A,P4SMA300A,SMAJ30A-N,P6SMB250A,SMAJ5.0A-23-TR70,SACB7.0,P4SMA160CA,1KSMB130A,P6SMB7.5CA,SMA6J43A,P4SMA82CA,SMAJ7.0CA-23-RG70,SMAJ18A-23-RG70,SMAJ150A-L,SMBJ400CA,SMBJ36A-GT3,P6SMB120A,SMA6J10CA,P6SMB51CA,SMBJ7.5CA-SA-GT3R,P4SMA18CA,P6SMB6.8A,P4SMA540A,P6SMB300CA,SMAJ90A,SMBJ14CA,SMBJ70A,SMA6J45CA,P6SMB8.2A,SMA6J20A,SMAJ7.0CA,SMBJ48A-23-RG70,SMAJ8.5A,1KSMB30CA,P4SMA550CA,P4SMA56A,P6SMB,SMBJ33CA-MN,P6SMB540CA,SMA6J36CA,SMAJ18CA-23-TR70,P6SMB16A,P6SMB300A,1KSMB22A,SMBJ130CA,1KSMB62CA-N,1.5SMB39A,1KSMB43CA,SMAJ18CA,SMBJ45CA-SA-GT3R,P4SMA33A,SMAJ28A-23-TR70,SMBJ36CA,P4SMA170A,SMBJ5.0A-23-TR70,P6SMB39A,P6SMB15A,SMAJ250CA,1KSMB150A,P6SMA440CA-L,1KSMB47A,SMBJ7.5CA-GT3,SMBJ15CA-ER,P4SMA10A,P6SMB27CA,SMAJ60CA,SMA6J7.5CA,SMA6J58CA,P6SMB91CA,SMA6J12CA,P6SMB200CA,P4SMA12CA,P4SMA480CA,1KSMB24A,P6SMB16CA,P4SMA11A,SMBJ14CA-23-TR70,SMBJ90A,SMBJ12CA,SMBJ58CA,P6SMB13A,SMBJ17CA-23-TR70,SMBJ36A-23-RG70,SMAJ130CA,SMBJ350CA,SMBJ100A-ER,SMBJ5.0A,P4SMA12A,P4SMA36A,P6SMB75A-N,SMA6J85A,P6SMB36A,SMAJ16CA,P6SMB12A,P4SMA36CA,SMAJ5.0CA,SMBJ11CA-54,P6SMA440A-IE,P4SMA13A,SMAJ14A-,P6SMB10A,1KSMB170A,P4SMA47CA,P6SMB11A,SMAJ150CA,1KSMB56CA,P4SMA250A-SF,1KSMB10CA,1KSMB43A,P6SMB100CA,SMAJ8.0CA-23-TR70,SMBJ45CA,P6SMB58A,1KSMB180CA,SMA6J8.5CA,SMBJ170A,SMA6J14CA,SMBJ10CA,P6SMB540A,1KSMB68A,SMBJ6.0CA-23-RG70,SMBJ58A-ER,1KSMB20A,P6SMB18CA,P4SMA15A,SMAJ300A,SMAJ36CA-LC,P4SMA39A,SMAJ150A-23-RG70,SMA6J60A,SMBJ250CA,P6SMB82CA,P6SMB33A,P6SMB400A-102,P4SMA20CA-54,SMAJ6.5CA-23-TR70,P6SMB440CA,1KSMB7.6CA,1KSMB6.8CA,SMAJ36CA-54T7,1KSMB18CA-DH,SMBJ5.0CA,P6SMB47CA,1.5SMB43A,SMBJ220CA,P4SMA480A,SMAJ200CA-54T7,SMAJ14A-23-TR70,P6SMB220CA,SMBJ48A-SA-GT3,SMAJ16A,1KSMB24CA,1KSMB62A,P4SMA130A,P6SMB36CA,SMBJ78CA,SMA6J18CA,1.5SMB20CA,SMAJ48CA,SMBJ43CA,SMBJ170A-SA-GT3R,SMBJ5.0CA-KF,SMAJ17A,SMBJ440CA-23-RG70,SMAJ7.5CA,SMAJ22A-23-TR70,SMAJ13CA-23-TR70,SMBJ45CA-23-TR70,P4SMA110CA,1KSMB110CA,SMBJ9.0A-23-TR70,SMBJ33CA-0028,SMBJ7.0A,SMAJ400A,SMA6J16CA,1.5SMB100CA,SMBJ54CA,SMAJ15CA,SMBJ18A,SMAJ14A,SMBJ150A,SMAJ90CA,SMAJ24A-N,P6SMB12CA,P6SMB58CA,1.5SMB20A,SMAJ300CA,SMAJ15A-54T7,P6SMB440A-101,P4SMA30CA,SMAJ26CA,SMBJ100CA,1.5SMB68A,SMA6J7.0CA,SMAJ15A,1KSMB13CA,1KSMB,SMA6J100A,P6SMB120CA,1.5SMB23A,SMBJ26A-23-TR70,MSMBJSAC5.0,1KSMB82A,1.5SMB33CA,SMBJ16A,SMBJ30CA,1.5SMB47A,SMAJ36A,SMAJ12A,P4SMA51A,P4SMA75A,1.5SMB22A,SMA6J90A,SMAJ8.5CA,SMBJ10A-23-TR70,SMAJ180A,P4SMA150A,SMBJ440CA,1.5SMB68CA,1.5SMB22CA,P4SMA43CA,SMBJ17A,SMAJ15CA-23-TR70,SMAJ13A,SMBJ120CA,SMBJ70CA-ER,SMAJ18A-23-TR70,SMBJ18CA-23-TR70,SMBJ14A,SMBJ5.0CA-23-TR70,P6SMB18A,SMAJ13CA,P4SMA10CA,SMAJ100CA-23-TR70,P4SMA56CA,SMAJ7.0A-23-TR70,SMAJ15A-23-TR70,SMBJ28CA-ER,SMAJ58A,SMBJ130A,SMAJ10A,SMA6J60CA,1KSMB15CA,SMBJ7.5A,SMBJ7.0CA-23-TR70,SMA6J8.0CA,SMBJ15A,SMAJ24CA,SMAJ400CA,SMAJ170CA,1.5SMB24A,P6SMB440CA-L,SMAJ11A,P4SMA30A,P4SMA440A,SMA6J120A,SMA6J51CA,SMBJ9.0A,SMBJ6.0A-54,SMA6J6.0CA,SMBJ58CA-37,SMBJ12A,SMBJ16CA-23-RG70,SMAJ200CA,SMAJ8.5CA-23-TR70,SMBJ36A,P6SMB150A,SMBJ24CA-23-TR70,SMAJ6.0A,SMAJ33CA,SMBJ6.0CA-SA-GT3R,SMBJ350A,1.5SMB82A,SMBJ6.5CA,P4SMA550A,SMA6J26A,SMA6J40CA,1KSMB39CA,P6SMB82A,1.5SMB24CA,SMAJ160A,SMBJ13A,SMBJ85CA,SACB5.0,P6SMB43CA,1KSMB150CA,SMAJ33CA-54T7,SMAJ33A,P4SMA220A,SMBJ6.0A-23-TR70,SMAJ40CA-23-TR70,SMBJ58A,SMBJ22CA-23-TR70,SMAJ85A-L,SMAJ11CA,SMBJ110A,P6SMB30CA,SMBJ220A-L,SMBJ75CA-23-TR70,SMAJ78A,SMBJ300CA,SMAJ54A,SMAJ30A,SMA6J24A,SMBJ5.0A-54,SMA6J48A,SMBJ11CA-SA-GT3R,SMBJ10A,SMBJ36A-23-TR70,SMA6J8.5A,P6SMB8V2CA,SMAJ440CA,SMBJ11A,P6SMB480CA,SMAJ36CA-23-TR70,HTVSB7.0CA-100,SMAJ22CA,SMBJ220A,SMAJ75A,SMBJ51CA-23-TR70,SMAJ51A,SMBJ33A-014,SMAJ100CA,P4SMA510CA,P4SMA9.1A,SMBJ7.5CA,SMA6J5.0CA,P4SMA91A,P6SMB10CA,P6SMB170A,SMBJ12CA-N,P4SMA110A,1.5SMB62A,SMAJ188A,SMA6J6.5A,SMBJ33A,SMAJ6.5A,SMBJ440A,SMA6J75CA,SMAJ20CA,SMAJ6.0CA-23-TR70,SMAJ6.5CA,SMBJ200CA,SMBJ78A,P4SMA7.5A,SMAJ28A-37,P4SMA350A,SMAJ150A-23-TR70,P6SMB56CA,SMA6J64CA,SMA6J28A,SMBJ30A,SMBJ54A,P4SMA6.8CA,SMA6J8.0A,P4SMA180CA,1KSMB130CA,SMBJ200A,SMBJ5.0CA-MD,P6SMB15CA-HW,P6SMB400A-SCH,SMBJ,P4SMA400A,1KSMB18A,P4SMA9.1CA,P6SMB160CA,P6SMB43A,P4SMA15CA,P6SMB68A,SMBJ20CA-SA-GT3,SMBJ70CA,SMBJ170A-SA-GT3,P6SMB110A,P4SMA170CA,SMBJ24A-37,1KSMB9.1CA,SMBJ6.5A-37,P4SMA7.5CA,SMAJ7.5A,1KSMB62CA,SMA6J54A,SMAJ350A,SMA6J78A,SMBJ13A-C,SMAJ60A,SMAJ,P4SMA510A,SMAJ12CA-23-TR70,SMBJ17CA,SMBJ40A,P
【技术】浅谈TVS在汽车抛负载应用选型设计
TVS作为浪涌抑制器,其应用涉及到通信与电源回路的方方面面,因为太过普遍,很多应用都是参考或延用过往设计,只知其保护效果而不知其根源,本章通过对于抛负载TVS选型计算展开分析,为新项目设计提供思路,该计算方式同样适用于工业TVS选型应用。
【应用】超低电容TVS阵列实现CVBS端口的静电和浪涌保护
SLVU2.8HTG具有2pF的负载电容,超过了IEC61000-4-2ESD标准的ESD最高保护水平。
3通道TVS阵列SP0503BAHTG用于USB防护时,该如何使用?
3通道TVS阵列SP0503BAHTG用于USB防护时,其公共端接USB的电源地GND,另外3端分别接USB的电源VCC、数据线USB D+和USB D-。
【应用】力特TVS TPSMD28A用于EPS,功率高达3KW,快速保护响应时间通常小于1.0ps
客户EPS的12V电池供电系统项目,要求10/1000μs波形下的峰值脉冲功率能力要达到3000W,同时贴片封装最合适,单向TVS,电压28V最好,推荐力特(Littelfuse)的TVS TPSMD28A,可以满足客户的要求。
Littelfuse(力特)TVS在汽车电子中的“抛负载”保护选型建议
描述- 本文探讨了汽车电子中TVS(瞬态抑制二极管)在“抛负载”保护选型中的应用。文章首先介绍了汽车电子安全可靠性的重要性,并阐述了ISO 7637-2和ISO 16750-2标准中关于抛负载测试的要求。接着,详细分析了不同抛负载脉冲的能量差异,并讨论了TVS在5a和5b抛负载保护中的选型问题。最后,通过具体案例计算验证了TVS在满足ISO 16750-2标准脉冲5a测试时的性能。
型号- SLD8S24A,TPSMC27A
放大器输入信号的过压保护应用中需要一款3.3V的TVS管,请问有无合适型号推荐?
推荐使用SMAJ系列的型号SMAJ5.0A。
LFPCN#41440 Pre-PCN Littelfuse TP5KPXXX,P600 TVS汽车产品,模塑料替代品
描述- Littelfuse公司通知客户,由于供应商的注塑化合物即将停产,为保障产品供应的连续性,计划更换TP5KPxxx、P600 TVS AUTO产品的注塑化合物。产品形式、功能、质量、可靠性将保持不变。受影响的产品将按照既定性能和可靠性标准进行全面认证。提供样品需客户提出请求。计划的关键里程碑包括:8月30日为最后一批PCN库存订单日期,11月30日发布PCN和认证报告,6月30日为旧来源的最后量产日期。
型号- TP5KP64CA,TP5KP43A,TP5KP24CA,TP5KP45CA,TP5KP22CA,TP5KP51A,TP5KP20CA,TP5KP43CA,TP5KP60CA,TP5KP11A,TP5KP28A,TP5KP16A,TP5KP48A,TP5KP17CA,TP5KP15CA,TP5KP51CA,TP5KP60A,TP5KP13CA,TP5KP36CA,TP5KP20A,TP5KP11CA,TP5KP40A,TP5KP36A,30KPA345CA-HRA,TP5KP24A,TP5KP12A,TP5KP30CA,TP5KP17A,TP5KP22A-B,TP5KP48CA,TP5KP13A,TP5KP45A,TP5KP33A,TP5KP40CA,TP5KP18A,TP5KP26A,TP5KP18CA,TP5KP16CA,TP5KPXXX,TP5KP54CA,TP5KP58CA,TP5KP54A,TP5KP14CA,TP5KP30A,TP5KP12CA,TP5KP33CA,TP5KP14A,TP5KP58A,TP5KP22A,TP5KP15A,TP5KP28CA,TP5KP26CA
在TVS应用中,双向TVS是否可以替换单向TVS使用?
一般双向的TVS可以抑制正反过压,当应用于通讯接口时可以使用双向的TVS,当用于电源接口时,如果要考虑防接反功能的话则不能用双向TVS替代。
【EOL】废弃的TVS标准零件号,无后缀A,Vbr范围+/-10%(LFPCN 41327)
描述- Littelfuse公司宣布将淘汰Vbr ±10%范围的TVS STD元器件型号,并替换为Vbr ±5%型号。这些新型号具有更严格的公差,并已在全球范围内广泛应用。受影响的系列包括SMAJ、P4SMA、SMBJ、P6SMB、SMCJ、1.5SMC、SMDJ、5.0SMDJ、1KSMB、P4KE、P6KE、1.5KE、SA、LCE、5KP、15KPA、20KPA和30KPA。最后购买日期为2020年10月16日,最后发货日期为2020年12月16日。
型号- P4SMA16C,P4SMA16A,SMAJ6.0CA,SMAJ40CA,30KPA90-B,20KPA180,20KPA232C-B,30KPA170CA,P4SMA160,P6KE62C-B,20KPA20,SA18-B,20KPA172,SMDJ78CA,P4SMA170,SA54C-B,1.5SMC13CA,P4KE540-B,SMCJ14CA,P4SMA18C,20KPA36,20KPA88C-B,P4SMA18A,SA7.5-B,SMDJ58C,SMCJ300,P4SMA16CA,SA6.5C-B,5KP120-B,SMCJ100CA,20KPA44,P6KE68C,SA30C-B,P4SMA180,SMBJ300C,20KPA48CA,5KP30C,P4KE18-B,SMBJ300A,20KPA40,5KP30A,SMBJ150CA,20KPA28,SMDJ170A,20KPA26,SMAJ70A,20KPA24,SMAJ70C,15KPA36-B,20KPA192,SMDJ170C,SMDJ58A,20KPA34,SMCJ30C,20KPA32,20KPA30,SA48CA,SMCJ30A,SA180C,20KPA40C-B,SA180A,5KP9.0C-B,1.5KE24-B,30KPA216C-B,1.5SMC9.1,LCE13-B,20KPA144,SMAJ7.0,20KPA64,SMAJ7.5,20KPA60,SA22CA,SMAJ100C,20KPA48,P6KE8.2CA,SMAJ100A,30KPA260-B,P6KE550C-B,20KPA132,1KSMB130A,P4KE180A,1KSMB130C,P4KE180C,20KPA56,SA110CA,20KPA52,20KPA180C,30KPA54CA,P4SMA82CA,P6KE13C-B,SMDJ54A,20KPA160,30KPA198A,SMDJ160CA,30KPA198C,20KPA180A,SMDJ54C,SMBJ400CA,20KPA80,5KP SERIES,20KPA88,P6SMB51CA,P4KE22CA,P4KE6.8C-B,P4KE12C-B,20KPA68,SMCJ220CA,1.5KE510,15KPA40CA,1.5KE51A,1KSMB30CA,1.5SMC39CA,1.5KE11-B,1.5KE51C,20KPA72,15KPA240C-B,P6SMB,P6SMB160,SA70CA,1.5KE36CA,5KP36C,P6SMB16C,20KPA104,15KPA100A,5KP36A,15KPA100C,1.5KE550,P6SMB16A,1.5KE33C-B,30KPA,1KSMB43CA,SMAJ18CA,SA17CA,1.5KE170CA,P6SMB150,5KP90CA,P4SMA170C,1.5KE530,SMDJ51C,SMDJ51A,P4SMA170A,30KPA72-B,P6SMB15C,SA40-B,1.5KE540,LCE7.0-B,15KPA54-B,P6SMB15A,P4SMA10A,1.5KE56A,1.5SMC440A,1.5SMC440C,P4SMA100,20KPA120,SA5.0CA,1.5KE56C,P4SMA480CA,P6KE150-B,5KP24CA,P6SMB130,P6SMB16CA,P4SMA11A,SMBJ90C,SMBJ90A,SMBJ12CA,P6SMB12C,P4KE530C,5KP60-B,P4KE530A,P6SMB13A,20KPA112,P4SMA110,P6SMB13C,P4SMA10C,P4SMA12C,SMBJ5.0A,P6SMB120,SMBJ5.0C,P4SMA12A,P6SMB11C,LCE6.5,P6SMB12A,P4SMA120,20KPA40-B,SMBJ9.0,SA78C-B,P4KE170-B,P4SMA11C,P4SMA13C,P6SMB110,P4SMA13A,P6KE180CA,30KPA102C-B,P6SMB10A,P6SMB10C,P4SMA47CA,15KPA150-B,P6SMB11A,P4SMA130,1KSMB56CA,SMDJ5.0,P6SMB100CA,P6SMB100,15KPA18CA,P4KE400A,P4KE400C,1.5KE10CA,1KSMB68C,1KSMB68A,P4KE300-B,30KPA84C,P4SMA15C,P4SMA15A,15KPA30A,15KPA30C,P6KE27CA,30KPA84A,5KP33A,P6SMB82CA,15KPA180CA,5KP18C-B,P4SMA150,1KSMB6.8CA,5KP11CA,30KPA36CA,5KP33C,P4KE6.8CA,20KPA52CA,P4KE6.8C,P6SMB47CA,1.5SMC250CA,30KPA33C-B,P4KE15C-B,P4SMA480C,P4SMA480A,P6SMB220CA,15KPA240,1KSMB62C,1.5KE540A,1KSMB62A,P4KE220,SA9.0,1.5KE540C,15KPA24A,30KPA90A,30KPA90C,P6KE7.5,P4KE20C,P4KE20A,15KPA24C,SA10-B,SMAJ48CA,SMBJ43CA,30KPA45C-B,SMCJ7.5C,SMAJ400C,SMCJ7.5A,SMAJ400A,30KPA71CA,SMBJ180,LCE7.0,SA90A,SA90C,LCE7.5,1.5KE12C-B,30KPA102A,P4KE10-B,15KPA40-B,30KPA102C,SMBJ18C,SMBJ18A,P4KE200,15KPA220,1.5SMC75CA,1.5KE350-B,P6KE220CA,SMAJ300CA,SA40CA,30KPA54-B,15KPA22A,15KPA22C,P4KE27C-B,1KSMB13CA,1.5KE82C-B,P6KE180-B,20KPA96CA,SMBJ160,SMDJ90,SA26C-B,1.5KE510CA,SA100C,P6KE550-B,SMBJ16C,P6KE100CA,SMBJ16A,30KPA108C,5KP28C,20KPA240CA,15KPA280,SMBJ30CA,5KP28A,1KSMB6.8,30KPA108A,5KP130C-B,15KPA28C,SMDJ85,SMBJ170,15KPA28A,SMAJ180C,SMAJ8.5CA,15KPA18-B,SA54-B,SMAJ180A,P4KE100A,P4KE39C-B,P4KE100C,5KP43C-B,SMBJ17C,P6KE27-B,SMBJ17A,1.5KE6.8C-B,SMBJ120CA,SMDJ78,SMDJ75,20KPA120CA,5KP8.0C,SMDJ70,5KP8.0A,1.5SMC110,15KPA58C-B,1.5SMC10A,5KP250A,1.5SMC10C,P6SMB180,15KPA260,SMBJ14C,SMBJ14A,5KP12-B,5KP250C,P6SMB18A,P6SMB18C,SMDJ16CA,1.5SMC100,SMBJ130C,SMBJ130A,1.5SMC130CA,SMDJ64,15KPA26A,15KPA48CA,15KPA26C,P6SMB170,SMBJ150,SMDJ60,5KP120CA,SMBJ15C,SA100A,SMBJ15A,SMAJ170CA,SA14C-B,SMDJ58,SMDJ54,P6KE75,SMBJ120,SMDJ51,P4SMA9.1,15KPA180A,15KPA180C,30KPA260CA,P4KE220C-B,SMBJ11C,SMBJ12A,SMAJ6.0A,P6KE62CA,SMAJ6.0C,SMDJ48,SA51C-B,P6KE68,SMDJ45,1.5KE250C-B,SMDJ43,1.5SMC91A,1.5SMC91C,SMBJ130,SA7.5CA,SMDJ40,P6KE82,1KSMB39CA,SMCJ7.0C,SMCJ7.0A,SMDJ51CA,15KPA22CA,SMBJ12C,SMBJ13C,SMBJ13A,LCE26-B,P6KE75A,P6KE75C,SMDJ36,1.5KE10-B,SMDJ33,5KP210-B,SMBJ100,P4SMA220A,SMDJ30,P4SMA220C,P4KE480CA,P6KE91,SMCJ150C,30KPA70C-B,SMCJ150A,20KPA172A,20KPA172C,P4KE27C,SA6.0C,SA6.0A,5KP8.5C,SMDJ28,SMDJ26,5KP8.5A,SMDJ24,SMAJ78A,SMAJ78C,SMDJ22,SMBJ110,SMDJ20,5KP120A,5KP120C,SMBJ10C,SMBJ10A,P4KE27A,SMBJ11A,SMAJ22CA,SMDJ18,SMDJ17,SMDJ16,SMDJ15,SMCJ6.5CA,SMDJ14,SMDJ13,SMDJ12,SMDJ11,SMDJ10,SMAJ75A,SMCJ36A,P6KE30,SMAJ75C,SMCJ36C,20KPA48-B,P4SMA9.1A,P4SMA9.1C,P4KE36-B,P4SMA91C,P4SMA91A,P6KE27,1.5KE100A,1.5KE100C,P6SMB170A,P6KE24,P6SMB170C,P6KE22,P4KE250,P6KE43,SMCJ45CA,30KPA84CA,P4KE24C,P6KE75CA,P4KE24A,SMAJ6.5C,P6KE39,SMBJ440C,P6KE36,P6KE33,SMAJ6.5A,SMBJ440A,P4KE350C-B,P6KE51,SMCJ58CA,15KPA22C-B,SMDJ7.5CA,P6KE600C-B,P6KE8.2-B,1.5KE18CA,5KP60CA,1.5KE170-B,P6KE47,SMCJ33A,SMCJ33C,P4SMA350A,P6KE62,SA36-B,P4KE22C,5KP43-B,P4KE22A,P4SMA350C,P4SMA6.8CA,SMCJ350,1.5KE30C-B,SA6.5C,P4KE6.8A,SA6.5A,P6KE56,SMAJ60,SA36CA,1.5KE6.8,SMBJ,5KP30-B,SMDJ20CA,SMCJ200,P4SMA15CA,30KPA108,SMAJ58,30KPA102,P6SMB200,SMAJ54,SMAJ51,SMDJ160A,P4SMA510C,SMAJ60A,SMAJ,SMAJ60C,P4SMA510A,SMDJ160C,SMDJ48C,SMDJ48A,SMCJ20C,SMAJ45,SMCJ7.0CA,SMAJ48,P4KE36CA,SMCJ20A,30KPA198-B,SMAJ43,SMAJ40,P6KE200A,20KPA36CA,SMDJ,SA160-B,15KPA48-B,SMBJ85C,SMBJ85A,P4KE9.1,P4KE120CA,SMAJ6.0,P4SMA400CA,30KPA120,SMAJ6.5,SMAJ36,P6KE200C,SMAJ30,SMAJ33,SMCJ,SMDJ45C,SMDJ33CA,SMDJ45A,1.5SMC8.2CA,20KPA72-B,SMAJ28,1KSMB120A,1KSMB120C,SMAJ24,30KPA132,SMAJ26,SMAJ20,SMAJ22,SMCJ13CA,SMDJ64CA,5KP180CA,SMAJ17,SMAJ16,15
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