TVS二极管要如何正确的选用?
TVS二极管是一种用于保护敏感电子设备免受瞬态电压冲击(如雷击、静电放电等)损坏的器件。在现代电子设备中,TVS二极管的正确选用是确保电路可靠性和稳定性的关键。本文中辰达行来为大家介绍TVS二极管的正确选用方法,希望对各位工程师朋友有所帮助。
1. 反向工作电压(Reverse Standoff Voltage, Vrwm)
反向工作电压是指TVS二极管在正常工作状态下不导通时所能承受的最大持续电压。这个参数非常关键,因为它决定了TVS二极管在正常工作时不会干扰电路。选用时,Vrwm应略高于电路中的工作电压。例如,如果电路的工作电压为5V,那么选择Vrwm为5.5V或更高的TVS二极管是合理的。选择过低的Vrwm可能导致TVS二极管在正常工作电压下误导通,从而影响电路功能。
2. 击穿电压(Breakdown Voltage, Vbr)
击穿电压是TVS二极管开始导通并提供保护的电压。当瞬态电压超过Vbr时,TVS二极管会迅速导通,将多余的电流引导至地,从而保护电路。击穿电压通常应略高于反向工作电压,但要低于电路中可能出现的最大电压。通常,TVS二极管的Vbr范围会在标称值的±10%范围内,因此在选择时要注意其容差范围,以确保电路在过压条件下能够及时保护。
3. 峰值脉冲电流(Peak Pulse Current, Ipp)
峰值脉冲电流是TVS二极管在短时间内能够承受的最大瞬态电流。这个参数通常与瞬态事件的能量相关,如雷击或电源开关操作产生的浪涌电流。选用时,应根据电路可能遭受的最大瞬态电流选择具有足够Ipp的TVS二极管,以确保其在保护期间不会损坏。一般情况下,Ipp越高,TVS二极管的保护能力越强,但同时也会影响器件的体积和成本。
4. 箝位电压(Clamping Voltage, Vc)
箝位电压是指当TVS二极管导通后,将瞬态电压限制在某一安全值的电压。这个参数直接影响被保护电路的安全性。理想情况下,Vc应尽可能低,以最大限度地保护电路中的敏感元件。然而,Vc又必须高于电路的正常工作电压,否则在正常操作期间可能会误触发。因此,在选择TVS二极管时,应确保箝位电压低于被保护元件的耐受电压,同时略高于电路的最高工作电压。
5. 响应时间(Response Time)
TVS二极管的响应时间是指它从检测到过压到开始导通的时间。TVS二极管通常具有极快的响应时间,通常在皮秒级别。这对于高频应用或非常敏感的电路来说尤为重要。在选用TVS二极管时,虽然大多数TVS二极管的响应时间都很短,但仍应确保其足够快速,以应对瞬态电压的快速变化。
6. 封装类型与散热
封装类型直接影响TVS二极管的热管理和安装方式。对于需要处理大功率瞬态的场合,散热性能良好的封装(如DO-214、SMC等)是优选,这可以有效地减少器件内部的热积累,防止过热损坏。对于空间受限的电路板,SMD封装类型可能更为合适,但同样需要确保其散热设计足够充分。
TVS二极管的正确选用是保障电路在瞬态电压冲击下安全运行的关键。通过综合考虑反向工作电压、击穿电压、峰值脉冲电流、箝位电压、响应时间以及封装类型等关键参数,工程师可以为特定应用选择最适合的TVS二极管。这不仅能提高电路的可靠性,还能延长其使用寿命,确保设备在各种极端条件下稳定运行。
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目录- Transient Voltage Suppression Diodes (TVS Diodes) TVS Diodes Features TVS Overview TVS Diodes Description TVS Diodes Functional Diagram TVS Diodes Applications / Typical Applications TVS Diode Selection Checklist TVS Diodes Glossary TVS Diodes Characteristics TVS Diodes Part Numbering System TVS Diodes Marking TVS Diodes Reflow Soldering TVS Diodes Wave Soldering TVS Diodes Attention TVS Diodes Specification TVS Diodes Packaging Information
型号- SPCL6 SERIES,LCE9.0A,SMCJ36CA,1.5SMC540CA,P4SMA16A,SMAJ6.0CA,30KPA45A,SPCL3-170C,SMAJ40CA,SMDJ12A,SMA6J78CA,SMDJ43CA,SMBJ51A,5KP200A,30KPA170CA,SMF10CA,P6SMB56A,LCE22A,5.0SMD SERIES,SMDJ13A,P6KE22A,20KPA26CA,5.0SMDJ170A,P6KE24A,3.0SMCJ45A,SMDJ78CA,SMDJ11A,30KPA280A,SMF26A,3.0SMCJ45C,SMF45CA,SPC10 SERIES,1.5SMC13CA,SMCJ14CA,P4SMF85A,P4KE13CA,5KP75A,SMCJ78A,30KPA300CA,P4SMA530CA,P4SMA18A,SMDJ10A,P6KE18CA,5.0SMDJ85A,5KP78A,LCE24A,P4SMA16CA,SMCJ100CA,30KPA48A,3.0SMCJ188CA,20KPA48CA,5KP,P6KE20A,5KP28CA,SMBJ300A,P4SMF40A,5KP30A,SMBJ150CA,1.5KE150A,P4SMA91CA,SMDJ170A,30KPA45CA,SMAJ70A,SMAJ75CA,SMA6J43CA,SMF24A,SMA6L9.0A,SMBJ16CA,SMA6J64A,SPCL3 - 015C,SMDJ58A,P6SMB170CA,1.5KE220CA,SPCL6-XXXX,SMCJ30A,P6KE540A,3.0SMCJ48CA,5.0SMDJ12CA,SPCL3-XXXX-12,SPCL10-190C,3.0SMCJ48A,P6KE27A,SM8S30CA,3.0SMCJ48C,P6SMB51A,SMF58CA,3.0SMCJ220CA,SMA6J5.0A,SMA6J×××,SMCJ75A,SMA6L40A,3.0SMCJ13CA,SMA6J22A,P6KE8.2CA,SMAJ100A,P4SMA300A,SMF22A,30KPA42A,SMDJ30CA,P6SMB250A,P4SMA160CA,1.5SMC400A,P4KE130CA,P4KE180A,5.0SMDJ170CA,SMA6J150CA,30KPA54CA,P4SMA82CA,P4KE250CA,15KPA75CA,30KPA150A,SMDJ54A,30KPA43A,30KPA198A,SMDJ160CA,1.5KE7.5A,20KPA180A,SMA6L85A,SMBJ400CA,3.0SMCJ26CA,5KP SERIES,SMF36CA,P6SMB120A,3.0SMCJ400C,3.0SMCJ400A,LCE20A,P6SMB51CA,SMA6J170A,P4KE22CA,1.5SMC300CA,P6SMB300CA,SMCJ220CA,SMF20A,SM8S43CA,15KPA40CA,1.5SMC530A,SMA6J20A,P6SMB8.2A,P4SMF28CA,15KPA70A,P4KE SERIES,5KP15CA,1.5KE51A,P4SMF43A,P6KE100A,1.5SMC39CA,P4SMA56A,P6SMB,P6SMB540CA,1.5KE36CA,15KPA75A,P6KE36CA,3.0SMCJ220A,15KPA100A,5KP36A,SMF14CA,P6SMB16A,P6SMB300A,20KPA280CA,20KPAXXXXX-TB,30KPA,5KP200CA,SMAJ18CA,3.0SMCJ220C,5.0SMDJ130A,1.5KE170CA,20KPA56A,5KP90CA,3.0SMCJ85A,SMF,SMDJ51A,5KP190CA,P4SMA170A,3.0SMCJ85C,1.5SMC47A,SMAJ250CA,P6SMB15A,SMCJ18CA,P4SMA10A,5KPXXXXX-TB,SMA6J7.5CA,1.5KE56A,20KPA160CA,SPCL6-380C,5.0SMDJ30CA,1.5SMC440A,SPCL6-XXXX-12,SMDJ120CA,P6SMB91CA,1.5SMC170CA,SMA6J12CA,LCE64A,P4SMA12CA,P4SMA480CA,5KP24CA,LCEXXXXX-TB,SPCL6-076C,P6SMB16CA,P4SMA11A,SMBJ90A,SMF64A,SMBJ12CA,P4KE530A,SAC8.0,P6SMB13A,SMAJ130CA,SMBJ350CA,SMCJ70A,3.0SMCJ400,SAC8.5,SMBJ5.0A,P4SMA12A,P4KE39CA,1.5SMC220A,3.0SMCJ40A,SMCJ100A,P6SMB12A,3.0SMCJ40C,P4SMF7.5A,1.5KE10A,SPC6066C,SPCL10-066C,20KPA52A,SPCL6-030C,P4SMA13A,3.0SMCJ100CA,3.0SMCJ6.5CA,P6KE180CA,P6KE510CA,P6SMB10A,3.0SMCJ17CA,SPC1430C,5KP7.5CA,P4SMA47CA,P6SMB11A,3.0SMCJ70CA,SMDJ5.0A,30KPA58CA,SMA6L170A,P6SMB100CA,5.0SMDJ78CA,1.5KE12A,15KPA18CA,P4KE400A,SM8S12CA,P6SMB58A,SPC10066C,3.0SMCJ440C,SMBJ170A,1.5KE10CA,LCE60A,P4KEXXXXX,3.0SMCJ440A,5.0SMDJ43CA,SMF60A,P6KE,P4SMA15A,1.5KE11A,30KPA144CA,15KPA30A,SMA6J60A,SMA6L5.0A,SMDJ12CA,3.0SMCJ43C,15KPA78A,3.0SMCJ43A,P6KE27CA,30KPA84A,5KP33A,P6SMB82CA,15KPA180CA,SPC6 SERIES,3.0SMCJ440,5KP11CA,1.5SMC SERIES,30KPA36CA,SMBJ5.0CA,P4KE6.8CA,20KPA52CA,3.0SMCJ6.5A,P6SMB47CA,3.0SMCJ6.5C,SMF200A,1.5SMC250CA,P4SMA480A,P6SMB220CA,1.5KE540A,SPCL10-058C,SMCJ85CA,SMDJ200CA,15KPA26CA,SMF70A,P4SMA130A,15KPA24A,30KPA90A,SPCL3-430C,P4KE20A,SMBJ78CA,1.5SMC51A,SM8S26A,P4KE68A,20KPA60A,3.0SMCJ188A,SPC1380C,SPCL15-XXXX-12,SMAJ48CA,SMBJ43CA,5KP33CA,3.0SMCJ188C,P6KEXXXXX-B,SMCJ7.5A,3.0SMCJ8.0,SMAJ400A,30KPA71CA,3.0SMCJ8.5,SMCJ110A,15KPA110CA,SMA6J16CA,30KPA102A,5KP20CA,30KPA320A,SMBJ18A,20KPA132A,P4KE62CA,P4SMF11CA,1.5SMC75CA,SMCJ8.5CA,LCEXXXXX-B,P6SMB12CA,SMAJ300CA,P6KE220CA,P4SMA30CA,1.5KE27CA,15KPA22A,SM8S24A,SMAJ26CA,5KP160A,SMA6J7.0CA,SACXXXXX,1.5SMC6.8A,20KPA96CA,3.0SMCJ40CA,1.5KE510CA,P6KE22CA,P6KE100CA,SMBJ16A,20KPA240CA,SMBJ30CA,P6SMB SERIES,1.5SMC56A,5KP28A,SPCL1-XXXX,P4SMF33CA,SMAJ36A,30KPA108A,P4SMA51A,SMA6L SERIES,SMF110A,15KPA28A,SMAJ8.5CA,SMAJ180A,SMBJ440CA,P4KE100A,1.5KE130CA,P4SMA43CA,SMBJ17A,SMF85CA,SPCL6-038C,SMBJ120CA,SM8S16CA,20KPA120CA,5KP8.0A,1.5SMC10A,5KP250A,5KP64CA,SMBJ14A,SM8S,P6SMB18A,SMAJ13CA,P4SMA56CA,SMDJ16CA,SMBJ130A,1.5SMC130CA,3.0SMCJ6.8C,15KPA26A,15KPA48CA,SMA6J60CA,SMDJ440CA,SM8S28A,5.0SMDJ36A,P4KE530CA,P4KE62A,3.0SMCJ75CA,5KP120CA,3.0SMCJ6.8A,SMBJ15A,P6KE180A,SMAJ170CA,P4SMF20CA,3.0SMCJ360C,SMDJ300A,3.0SMCJ360A,P4SMA440A,SMA6J120A,SMA6J51CA,SMBJ9.0A,20KPA56CA,15KPA180A,P4KEXXXXX-TB,SMA6L43A,30KPA260CA,SMBJ12A,SMF7.5A,30KPA144A,SMAJ6.0A,P6KE62CA,SPCL3 - 058C,SMBJ350A,5.0SMDJ100CA,1.5SMC91A,SMA6J110CA,SMA6L215A,SMA6J26A,SMDJ120A,SMCJ300CA,5.0SMDJ78A,SMCJ7.0A,SMDJ51CA,15KPA22CA,5.0SMDJ30A,5.0SMDJ48CA,SMBJ13A,SACB5.0,1.5KE62CA,P4SMF33A,P6SMB43CA,SMCJ170CA,P6KE75A,SPCL6-430C,SMAJ33A,SMCJ54CA,P4SMA220A,P4KE480CA,30KPA75CA,1.5SMC22CA,SMCJ150A,5.0SMDJ33A,20KPA172A,P6KE6.8A,30KPA360A,P4SMF15CA,SMBJ58A,P4SMF36A,5KP70A,1.5KEXXXXX,P6SMB30CA,5KP8.5A,SMAJ78A,SMAJ30A,SMA6J24A,5KP120A,SM8SXXA,5.0SMDJ26CA,SMBJ10A,SMA6J8.5A,SMDJ18A,SPCL10-015C,SMBJ11A,P4KE27A,5KP51CA,SMAJ22CA,SMBJ220A,SMCJ6.5CA,SMDJ400CA,SMAJ75A,SMCJ36A,SMAJ100CA,SMDJ60CA,5.0SMDJ75A,LCE26A,P4SMA9.1A,SMDJ17A,SMA6J5.0CA,SMBJ7.5CA,SMF54CA,P4SMA91A,3.0SMCJ6.0C,SMF150A,1.5KE100A,P6SMB170A,P6KE30A,SMCJ45CA,1.5SMC180A,SMAJ188A,SPC3 SERIES,30KPA84CA,SMA6L48A,SM8S22A,SMF7.0A,P6KE75CA,P4KE24A,SMDJ16A,SMAJ6.5A,SMBJ440A,20KPA30CA,SMCJ10CA,SMCJ58CA,3.0SMCJ22CA,SMDJ7.5CA,SPCL15 - 380C,SMA6L45A,SMAJ6.5CA,SMBJ200CA,LCE28A,5KP210A,5.0SMDJ17CA,1.5KE
TVS二极管整流器件主要参数及影响因素
TVS二极管是一种保护电子电路免受瞬态电压干扰的重要器件。它能够在极短时间内吸收高能量的瞬态电压,从而保护敏感电子元器件。了解TVS二极管的主要参数及其影响因素,对于选择合适的TVS二极管并在电路中合理应用非常重要。本文中辰达行来给大家介绍TVS二极管整流器件主要参数及影响因素,希望对各位工程师有所帮助。
技术探讨 发布时间 : 2024-08-21
VRD voltage regulating diode (= TVS diode)
型号- ZS1015,ZS1033U,Z6082,ZS1018,Z6100U,ZS1012,Z6120U,Z2047,ZS1033D,Z2010U,ZD022,ZD027,Z2082,ZS-D,Z6047,ZD068,Z2120,Z6068U,Z2018U,Z6120,ZS1022U,Z6022U,Z6082U,Z2 SERIES,Z6 SERIES,ZS1047,ZS1018U,ZS1022D,Z2012,Z2056,Z2018,Z6015,ZD033,Z6018,Z2015,Z6012,Z6039U,Z6056,ZS1018D,VRD SERIES,Z6047U,Z6015U,Z6027U,ZD039,ZD SERIES,Z6150U,Z6033U,ZS1039,ZS1033,ZS1027U,ZS1015U,ZS1047U,ZS1039U,Z2068,Z2100,Z2022,Z6027,ZS1015D,ZS1047D,Z2027,Z2012U,Z6100,Z6018U,Z6022,Z2180,ZD047,ZS1039D,Z6068,ZS1027D,Z2008U,ZS SERIES,ZS1012U,ZS1027,Z2033U-52Z,ZS1033D-T,Z6012U,Z6056U,ZS1022,ZS-U,Z6U SERIES,Z2015U,Z2033,ZD056,Z2039,Z6039,ZS1012D,Z6033,ZD015,Z2U SERIES,ZD018,Z2150
【技术】MDD解析瞬态抑制二极管的工作原理及作用
辰达行推出的MDD瞬态抑制二极管原理是什么,它的作用是什么呢?一、MDD瞬态抑制二极管的作用:讲的通俗一点,如果电路能承受的电压冲击不高于DC24V,那么在电源处焊接一个26V的TVS管,当供电电压不超过26V时,TVS管处于高阻态。
技术探讨 发布时间 : 2023-07-07
探讨静电二极管的工作原理、应用及注意事项
静电二极管是专门设计用来保护电子电路免受静电放电(ESD)影响的一种半导体器件。随着电子设备集成度的提高和工作电压的降低,电路对静电放电的敏感度显著增加,ESD二极管因此成为了现代电子设计中不可或缺的一部分。本文辰达行将深入探讨静电二极管的工作原理、应用及注意事项。
技术探讨 发布时间 : 2024-08-21
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可定制LAMP LED、 CHIP LED、 PLCC LED、 汽车用车规级LED、COB LED的尺寸/电压/电流等参数,电压1.5-37V,电流5-150mA,波长470-940nm。
最小起订量: 30000 提交需求>
可定制单色光灯珠、双色灯珠、全彩灯珠、发光二极管、贴片灯珠、贴片LED等产品,尺寸:0.6*0.3mm-3.2*2.7mm,波长:405-940nm,亮度:24-750mcd,电压:1.5-3.5V。
最小起订量: 3000 提交需求>
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