【经验】SLD8S24A如何助力汽车12V系统的5a,5b抛负载设计
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TVS管是一种高效能的保护类型的器件,在应用时,当两端受到瞬态的高压冲击时,TVS管能在ns级别甚至ps级别的时间内将自身的特性从高阻转化为低阻态,转换过程吸收大电流从而将TVS管两端的电压钳制在TVS的耐压值上,保护了负载端电路免受瞬态高能量的冲击。原理如图1所示。
图1:TVS应用原理
5a,5b是ISO16750-2的浪涌条件,该条件是基于车载各种开关、电源系统和负载特性可能产生的浪涌冲击能量决定的。满足5a/5b抛负载测试证明了产品在浪涌能力的保护方面的可靠性。
目前在端口回路为12V的系统,测试电压在16V,故TVS需满足16V以上的电平,经参数计算评估SLD8D24A满足需求。
汽车12V系统的5a脉冲波形曲线:
5a冲击曲线的主要参数:
当曲线的Us=101V,R1=1Ω,td=400ms时
TVS(SLD8D24A)导通后承受的电流:
Ipp=【(Us+Ua)-Vbr】/(R1+Rd)=【(101V+12V)-26.7】/(1+0.07)=79.7A(远小于SLD8D24A的8.3ms对应的1000A)
对应的冲击能量:估算为1/2*I2*Rd*t=0.5X79.7AX79.7AX0.07ΩX400ms=88.9J(远小于Ifsm2*Rf*8.3ms=149.4J)
Vbr:TVS的反向击穿电压,SLD8S24A是26.7~29.5V。
Vc:TVS的最大钳位电压,SLD8S24A的是38.9V
Rd:TVS导通时的阻抗。Rd=(Vc-Vbr)/Ipp。关于SLD8S24A,代入参数计算Rd=(38.9V-26.7V)/180A=0.07Ω。
Rf:TVS的正向导通阻抗,Rf=Vf/100A=0.018Ω
Ifsm:8.3ms波形对应的瞬态冲击电流1000A
5a,5b的浪涌冲击下,采用SLD8S24A后的电压抑制效果为US*:
实测的效果示意如图2,在回路瞬态冲击先,SLD8S24A的电流会在有冲击曲线在几个A左右,TVS钳位的电平在38.9V以内。
图2:TVS的响应的电压电流曲线效果示意图
SLD8S24A的主要参数:
SLD8S24A的封装信息:
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DO-214AA、DO-214AB TVS汽车产品和DO-214AA、DO-214 AB、DO-214 AC TVS高可靠性产品包装箱更换通知函
LITTELFUSE - TVS,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 Pre-PCN41499适用于TPSMxx/SLDxx/TP5KPxx/SLD8S/6S/5Sxx/TP1.5KExx/TP6KExx系列汽车TVS产品
Littelfuse公司向客户通报了关于TPSMxx/SLDxx/TP5KPxx/SLD8S/6S/5Sxx/TP1.5KExx/TP6KExx系列TVS AUTO产品的预PCN变更。由于原材料供应和业务连续性计划(BCP)的需要,公司计划将5英寸晶圆用于TPxx/SLDxx TVS AUTO,并可能引入替代供应商。产品规格、质量、可靠性将保持不变,最终PCN将在2024年中提供详细报告。
LITTELFUSE - TVS,TP1.5KE,TP5KPXX,P6KE510CA-SU,SLD6SXX,TPSMA6L,TPSMB300CA-VR,SLD8SXX,TPSMB300A-A,TPSMF4L,TPSMB650CA-A,TP6KE,SLD8S,TP5KP,P600 SLD,TPXX,SLD6S,TP5.0SMDJ,TPSMB350A-A,TP6KEXX SERIES,TP1.5KEXX,TPSMB300CA-A,TPSMC,TPSMB,TPSMD,TPSMB600CA-A,TPSMB300A-VR,TPSMXX,TPSMB350CA-A,TPSMB250CA-VR,TPSMB250A-VR,SLD5S,SLDXX,TP6KEXX
【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。
12V车载电源抛负载TVS 怎么确定TVS功率
您好,12V车载电源抛负载TVS选型 ,可以参考文章:【经验】简析汽车抛负载测试标准ISO7637-2和ISO-16750-2,如何选择一款TVS管帮助通过这两项测试,计算链接:【经验】如何通过公式计算给出ISO7637-2和ISO16750-2 5a 5b过抛负载测试的TVS管参数选型;建议使用力特SLD8S24A
使用Littelfuse汽车TVS二极管的汽车电路保护
本文介绍了汽车电路保护方案,重点阐述了使用Littelfuse汽车TVS二极管来保护汽车电子系统免受瞬态电压冲击。文章详细分析了汽车电子系统面临的电学挑战,如静电放电、雷击和电力电子电路中的开关负载,并介绍了Littelfuse TVS二极管如何保护车辆的安全、性能、舒适性和便利性系统。此外,文章还讨论了汽车总线保护,包括CAN和LIN总线,以及如何使用Littelfuse TVS二极管来保护这些总线。最后,文章比较了ISO16750-2和ISO7637-2标准在负载浪涌测试中的差异,并提供了选择合适的TVS二极管的指导。
LITTELFUSE - TVS,TVS DIODES,AUTOMOTIVE TVS DIODE,汽车TVS二极管,TVS二极管,TRANSIENT VOLTAGE SUPPRESSION DIODES,瞬态电压抑制二极管,SZSMF4L SERIES,TPSMA6L,SZP6SMB SERIES,SZ5KASMC,TP6KE SERIES,SLD,TPSMF4L,SLD33U-018,TP1.5KE SERIES,SLD6S SERIES,SZ1SMB,SZ1SMC,SZ1SMA,TP5KP SERIES,SZSMF SERIES,TP5KP,TPSMA6L24A,SLD6S,SZ1.5SMC,SLD33-018,TPSMC SERIES,SZ1SMA SERIES,SZ1SMC SERIES,TPSMB30CA,SLD8S SERIES,SLD15-017,SLD8S36A,SLD8S24A,TPSMB15CA,SLD5S,TP1.5KE,SZP6SMB,TP6KE,SLD SERIES,SZSMF4L,SLD8S,SLD5S SERIES,TPSMB24CA,SZSMF,TPSMA6L SERIES,TPSMA6L30A,TPSMB SERIES,SZ1.5SMC SERIES,TPSMC,TPSMB,TP5.0SMD,TPSMD,TPSMD SERIES,SZ1SMB SERIES,TPSMF4L SERIES,TPSMA6L15A,SLD15U-017,胎压监测,AIRBAGS,VALVES,GAS ELECTRIC,HYDROLYTIC CONTROLLERS,TIRE PRESSURE MONITORING,ULTRA-CAPACITORS,蓄电池断开,视频,BATTERY DISCONNECT,混合动力汽车,SEATING MEMORY,汽车电路保护,SEAT BELT PRE-TENSIONING,安全带预张紧,信息娱乐电子设备,AUTOMOTIVE CIRCUIT PROTECTION,气电的,HYBRID VEHICLES,ADAPTABLE SUSPENSION,信息娱乐,燃料电池电动,发动机管理,安全气囊,动力系统,剧场照明,HID照明,稳定性控制,VIDEO,控制单元,锂离子聚合物,导航系统,ADVANCED POWERTRAINS,水解控制器,CLIMATE CONTROL,马达,FUEL CELL ELECTRIC,POWERTRAINS,座位控制,MOTORS,RIDE CONTROL,STABILITY CONTROL,ANTI-ROLLOVER,NAVIGATION SYSTEMS,CONTROL UNITS,ENGINE MANAGEMENT,超级电容器,自适应悬架,SAFETY,防侧翻,行驶控制,座位记忆,先进的动力系统,THEATER LIGHTING,气候控制,INFOTAINMENT,HID LIGHTING,INFOTAINMENT ELECTRONICS,SENSORS,DIESEL ELECTRIC,LI-ION POLYMER,安全,SEATING CONTROLS,AUTOMOTIVE ELECTRONICS,阀门,传感器,汽车电子,燃料喷射器,FUEL INJECTORS,柴油电动
【选型】满足工业自动化、汽车电子控制系统领域需求的LIN总线ESD防护TVS选型推荐,可兼容12/24V电源系统
为保证LIN总线免受ESD静电影响导致相关敏感电子器件受损,一般需要对LIN总线做ESD防护,推荐选择PANJIT(强茂)双向非对称TVS管PJEC2415VM1WS-AU实现,过AEC-Q101认证;推荐littelfuse(力特)单向TVS管SD15C-01FTG和SD24C-01FTG搭配使用实现;推荐国产高特双向非对称TVS管GESD1524实现,主推用于工业自动化领域。
Littelfuse(力特)TVS在汽车电子中的“抛负载”保护选型建议
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。
LITTELFUSE - TVS,瞬态二极管,SLD8S24A,TPSMC27A,汽车电子
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可定制单位/双位/三位/四位LED数码管的尺寸/位数/发光颜色等性能参数,每段亮度0.8~30mcd,主波长470~640nm,电压2~10.2V。
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