汽车用TVS如何选型，确保TVS能够有效保护汽车电路？

时间： 2024-01-12 来源：里阳半导体微信公众号

技术问答

在生活中，BMS(Battery Management System，电池管理系统)是随处可见的，特别是在汽车电子和工商业储能中是不可或缺的。那么我们每天说的BMS到底是什么呢?在汽车电子中，BMS其实就是一块电路板，这块电路板可以实时监测电池的充电和放电情况，做短路/断路的保护措施，防止电池出现过充电和过放电，延长电池的使用寿命。它的主要工作就是处理电池有关的任务，外观如图一和图二。

BMS可以对锂电池做电压温度检测，对电流进行实时检测，与控制端之间做实时的通讯等，如图三(GIF)。

在BMS中为了确保电池的安全和可靠性，需要进行全面的保护措施。其中，TVS作为一种重要的瞬态抑制器件，在BMS中发挥着重要的作用。TVS能够快速吸收和抑制电路中的瞬态过压脉冲，从而保护电路中的电子元器件不受损坏。在汽车BMS中，TVS主要用于以下两个方面：

电源端口保护：TVS可以放置在电源入口端，用于吸收电源线上的瞬态过电压，保护后续电路免受损坏，如图四所示。同时，TVS也可以多颗并联使用，以提高吸收能力和可靠性。

信号端口保护：BMS中的信号端口也需要进行保护，以防止静电等瞬态能量对信号传输造成干扰或损坏。此时，可以选择专用的ESD保护器件，以更好地保护信号端口。

因此选择合适的TVS来保护BMS是非常重要的。满足汽车BMS要求的TVS需要满足以下条件：

(1)工作电压：TVS的VR值应大于或等于应用电路电压的1.2倍。

(2)耐受电压尖峰：汽车电路中的过电压尖峰可能会对TVS造成损坏，因此需要选择合适功率的TVS型号。

(3)寄生电容：TVS的寄生电容可能会对汽车电路中的信号产生干扰，因此需要选择寄生电容较小的TVS管来保护信号线路。

(4)可靠性：汽车电路中的TVS需要具有高可靠性，能够长时间稳定工作，并承受各种恶劣的工作环境，因此需要满足AEC-Q101可靠性标准。

(5)尺寸和重量：汽车电路中的TVS需要考虑到尺寸和重量的限制，以避免对汽车的布局和重量造成影响。

(6)认证和合规性：TVS应符合相关的国际标准和认证要求，以确保其符合汽车行业的要求和规定。

选择汽车用的TVS需要根据具体的应用场景和电路参数进行选型，以确保TVS能够有效地保护汽车电路。通常DC12V电源系统常用的TVS型号是SM8S24A，DC24V电源系统常用的型号是SM8S33A(感兴趣的小伙伴可以去里阳半导体官网中查看)。如果您觉得选型麻烦，世强硬创平台为您提供合适的方案。

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本文由子文转载自里阳半导体微信公众号，原文标题为:TVS在汽车BMS中的应用，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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产品变更通知及停产信息 - LITTELFUSE - Dec 29, 2023 RAR 英文下载

里阳半导体（Liown）汽车行业保护器件选型指南

型号- SMBJ5.0A,SM6S24A,SMCJ440A-Q,2R090MM-8,30KP-Q,SM8S33A,SMBJ6.5A,15KP36A-Q,5KP-Q,SM6S,SMCJ75A-Q,5KP36A-Q,SMBJ6.5CA,15KP-Q,SM8S30A,2R075ML-8,5.0SMDJ36A-Q,561KD20J,LTHXXA-YYBWGH,5.0SMDJ-Q系列,5KP33A-Q,SM8S系列,220KD10,220KD10J,20KP-Q,SMCJXXA,2R090ML-8,5KP24A-Q,SMBJ7.0A,180KD10,15KP30A-Q,5KP系列,5.0SMDJ-Q,SM8S,180KD10J,5.0SMDJ24A-Q,5KP,15KP20A-Q,SMBJ7.0CA,15KP24A-Q,15KPXXA-Q,SMBJ6.0A,SM8S20A,SM8SXXA,SMBJ30CA-Q,2R075MM-8,5.0SMDJ75A-Q,2R800ML-8,SMBJ16CA,SMBJ6.0CA,SM8S24A,SM8S36A,SM6S系列,P6SMAJ33CA-Q,SMBJ5.0CA

选型指南 - 里阳半导体 - 2022年08月 PDF 中文下载

WSxxP4SMA(-B)-AT Automotive Load Dump Protection TVS

型号- WS12P4SMA-B-AT,WS8.5P4SMA-AT,WS5.0P4SMA-B-AT,WS51P4SMA-AT,WS36P4SMA-AT,WS7.0P4SMA-B-AT,WS8.0P4SMA-B-AT,WS6.0P4SMA-B-AT,WS20P4SMA-B-AT,WS16P4SMA-B-AT,WS9.0P4SMA-B-AT,WS54P4SMA-B-AT,WS6.0P4SMA-AT,WS43P4SMA-B-AT,WS64P4SMA-AT,WS75P4SMA-AT,WS15P4SMA-AT,WS90P4SMA-AT,WS11P4SMA-B-AT,WS24P4SMA-B-AT,WS18P4SMA-B-AT,WS18P4SMA-AT,WS30P4SMA-AT,WS58P4SMA-AT,WS13P4SMA-AT,WS85P4SMA-B-AT,WS40P4SMA-B-AT,WS40P4SMA-AT,WS7.0P4SMA-AT,WS11P4SMA-AT,WS85P4SMA-AT,WSXXP4SMA-B-AT,WS28P4SMA-B-AT,WS15P4SMA-B-AT,WS22P4SMA-AT,WS6.5P4SMA-AT,WS20P4SMA-AT,WS5.0P4SMA-AT,WS54P4SMA-AT,WS6.5P4SMA-B-AT,WS7.5P4SMA-B-AT,WS14P4SMA-B-AT,WS33P4SMA-B-AT,WS8.5P4SMA-B-AT,WS78P4SMA-B-AT,WS33P4SMA-AT,WS22P4SMA-B-AT,WS48P4SMA-AT,WS8.0P4SMA-AT,WS70P4SMA-B-AT,WS16P4SMA-AT,WS30P4SMA-B-AT,WS48P4SMA-B-AT,WS78P4SMA-AT,WS75P4SMA-B-AT,WS7.5P4SMA-AT,WS45P4SMA-AT,WS26P4SMA-B-AT,WS64P4SMA-B-AT,WS14P4SMA-AT,WS51P4SMA-B-AT,WS43P4SMA-AT,WS28P4SMA-AT,WS12P4SMA-AT,WS45P4SMA-B-AT,WS9.0P4SMA-AT,WS13P4SMA-B-AT,WS58P4SMA-B-AT,WS10P4SMA-AT,WS26P4SMA-AT,WS70P4SMA-AT,WS90P4SMA-B-AT,WS24P4SMA-AT,WS10P4SMA-B-AT,WSXXP4SMA-AT,WS36P4SMA-B-AT

数据手册 - WAYON - Rev: E - 2024/3/22 PDF 英文下载查看更多版本

Littelfuse（力特）TVS在汽车电子中的“抛负载”保护选型建议

型号- SLD8S24A,TPSMC27A

用户指南 - LITTELFUSE PDF 中文下载

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

技术问答发布时间 : 2020-05-21

WSxxP15SMC(-B)-AT Automotive Load Dump Protection TVS

型号- WS58P15SMC-B-AT,WS15P15SMC-B-AT,WS48P15SMC-B-AT,WS78P15SMC-B-AT,WS45P15SMC-B-AT,WS12P15SMC-AT,WS40P15SMC-AT,WS6.5P15SMC-AT,WS180P15SMC-AT,WS18P15SMC-B-AT,WS28P15SMC-B-AT,WS300P15SMC-B-AT,WS64P15SMC-AT,WS110P15SMC-AT,WS13P15SMC-AT,WS9.0P15SMC-AT,WS120P15SMC-AT,WS250P15SMC-AT,WS30P15SMC-AT,WS8.0P15SMC-B-AT,WS7.0P15SMC-B-AT,WS18P15SMC-AT,WS54P15SMC-AT,WS12P15SMC-B-AT,WS22P15SMC-B-AT,WS36P15SMC-AT,WS20P15SMC-AT,WS400P15SMC-AT,WS130P15SMC-AT,WS64P15SMC-B-AT,WS8.0P15SMC-AT,WS14P15SMC-B-AT,WS54P15SMC-B-AT,WS11P15SMC-AT,WS14P15SMC-AT,WS24P15SMC-B-AT,WS7.5P15SMC-AT,WS160P15SMC-AT,WS16P15SMC-AT,WS22P15SMC-AT,WS100P15SMC-B-AT,WS200P15SMC-AT,WS110P15SMC-B-AT,WS350P15SMC-B-AT,WS100P15SMC-AT,WS16P15SMC-B-AT,WS120P15SMC-B-AT,WS5.0P15SMC-AT,WS85P15SMC-B-AT,WS130P15SMC-B-AT,WS170P15SMC-B-AT,WS6.0P15SMC-AT,WS33P15SMC-AT,WS36P15SMC-B-AT,WS75P15SMC-B-AT,WS160P15SMC-B-AT,WS26P15SMC-B-AT,WS150P15SMC-B-AT,WS58P15SMC-AT,WS150P15SMC-AT,WS7.0P15SMC-AT,WSXXP15SMC-AT,WS43P15SMC-AT,WS180P15SMC-B-AT,WS85P15SMC-AT,WS220P15SMC-AT,WS40P15SMC-B-AT,WS7.5P15SMC-B-AT,WS70P15SMC-AT,WS20P15SMC-B-AT,WS30P15SMC-B-AT,WS300P15SMC-AT,WS8.5P15SMC-AT,WS5.0P15SMC-B-AT,WS43P15SMC-B-AT,WS48P15SMC-AT,WS6.0P15SMC-B-AT,WS33P15SMC-B-AT,WS9.0P15SMC-B-AT,WS13P15SMC-B-AT,WS60P15SMC-B-AT,WS70P15SMC-B-AT,WS60P15SMC-AT,WS90P15SMC-B-AT,WS24P15SMC-AT,WS440P15SMC-AT,WS6.5P15SMC-B-AT,WS51P15SMC-B-AT,WS26P15SMC-AT,WS75P15SMC-AT,WS90P15SMC-AT,WSXXP15SMC-B-AT,WS11P15SMC-B-AT,WS350P15SMC-AT,WS78P15SMC-AT,WS400P15SMC-B-AT,WS8.5P15SMC-B-AT,WS10P15SMC-AT,WS45P15SMC-AT,WS10P15SMC-B-AT,WS200P15SMC-B-AT,WS28P15SMC-AT,WS440P15SMC-B-AT,WS220P15SMC-B-AT,WS250P15SMC-B-AT,WS15P15SMC-AT,WS170P15SMC-AT,WS51P15SMC-AT

数据手册 - WAYON - Rev: H - 2024/3/22 PDF 英文下载查看更多版本

WSxxP15SMC(-B)-AT Automotive Load Dump Protection TVS

型号- WS58P15SMC-B-AT,WS58P15SMC-AT,WS15P15SMC-B-AT,WS48P15SMC-B-AT,WS78P15SMC-B-AT,WS45P15SMC-B-AT,WS43P15SMC-AT,WS40P15SMC-AT,WS85P15SMC-AT,WS40P15SMC-B-AT,WS18P15SMC-B-AT,WS28P15SMC-B-AT,WS70P15SMC-AT,WS64P15SMC-AT,WS20P15SMC-B-AT,WS30P15SMC-B-AT,WS43P15SMC-B-AT,WS48P15SMC-AT,WS33P15SMC-B-AT,WS30P15SMC-AT,WS60P15SMC-B-AT,WS70P15SMC-B-AT,WS60P15SMC-AT,WS18P15SMC-AT,WS90P15SMC-B-AT,WS24P15SMC-AT,WS54P15SMC-AT,WS22P15SMC-B-AT,WS36P15SMC-AT,WS51P15SMC-B-AT,WS20P15SMC-AT,WS26P15SMC-AT,WS75P15SMC-AT,WS90P15SMC-AT,WS64P15SMC-B-AT,WSXXP15SMC-B-AT,WS54P15SMC-B-AT,WS78P15SMC-AT,WS24P15SMC-B-AT,WS16P15SMC-AT,WS45P15SMC-AT,WS22P15SMC-AT,WS28P15SMC-AT,WS16P15SMC-B-AT,WS15P15SMC-AT,WS85P15SMC-B-AT,WS33P15SMC-AT,WS36P15SMC-B-AT,WS75P15SMC-B-AT,WS26P15SMC-B-AT,WS51P15SMC-AT

数据手册 - WAYON - Rev: F - 2023/3/2 PDF 英文下载

WSxxP15SMC(-B)-AT Automotive Load Dump Protection TVS

型号- WS15P15SMC-B-AT,WS20P15SMC-AT,WS26P15SMC-AT,WSXXP15SMC-AT,WS43P15SMC-AT,WS40P15SMC-AT,WSXXP15SMC-B-AT,WS40P15SMC-B-AT,WS18P15SMC-B-AT,WS28P15SMC-B-AT,WS20P15SMC-B-AT,WS24P15SMC-B-AT,WS30P15SMC-B-AT,WS43P15SMC-B-AT,WS16P15SMC-AT,WS33P15SMC-B-AT,WS22P15SMC-AT,WS28P15SMC-AT,WS30P15SMC-AT,WS18P15SMC-AT,WS16P15SMC-B-AT,WS15P15SMC-AT,WS24P15SMC-AT,WS22P15SMC-B-AT,WS33P15SMC-AT,WS36P15SMC-B-AT,WS26P15SMC-B-AT,WS36P15SMC-AT

数据手册 - WAYON - Rev:D - 2019/11/25 PDF 英文下载收起

【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。

器件选型发布时间 : 2019-12-10

【应用】Littelfuse汽车级TVS及TVS阵列助力车载以太网网关实现电源、通讯接口保护

Littelfuse TVS，针对不同应用场合，不同功率应用，电源（TPSMB/SLD8S），Ethernet(SLVU2.8)，CAN(SM24CAN)，LIN(SM24)，具有低钳位电压和低泄漏电流，符合AEC-Q101认证，高可靠性，是电源，CAN-FD(CAN)，Ethernet，LIN等总线保护最佳之选。

应用方案发布时间 : 2018-11-21