【应用】力特TVS二极管SMAJ5.0CA用于伺服驱动器IO口保护，峰值脉冲功耗高达600W

时间： 2022-12-02 来源：世强

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主控单元是伺服驱动系统的核心，它与外部连接的IO口容易收到雷击、浪涌等影响，严重的会破坏主控的IO口。为了防止干扰信号损坏IO口，对主控单元造成影响，需要有较高的脉冲功率耗散和ESD防护等级的TVS，串联在需要保护的IO口和地之间。

有客户在设计总线型伺服驱动器时，需要TVS二极管用于主控单元中IO口的保护。根据上文所指出的需求，我们推荐了力特的TVS二极管SMAJ5.0CA，它反向峰值电压VRWM为5V，最大钳位电压VC为9.2V，最大反向漏电流Ir为800μA，满足主控单元IO口保护的需求；峰值脉冲功耗（@堆叠封装）高达600W，浪涌电流承受能力强；ESD防护等级满足±30kV，静电防护等级强；工作温度范围-65℃~150℃，保证伺服驱动系统在工业环境下工作的可靠性。

图1. SMAJ5.0CA在伺服驱动器中的应用

SMAJ5.0CA产品特点：

1、峰值脉冲功耗（@堆叠封装）高达600W，浪涌电流承受能力强，保护伺服系统的稳定性；

2、ESD防护等级±30kV，静电防护电压等级高，满足伺服系统的可靠性与稳定性需求；

3、工作温度范围-65℃~150℃，工作温度范围宽，保证伺服驱动系统在工业环境下工作的可靠性；

综上所述，力特TVS二极管SMAJ5.0CA适用于伺服驱动系统主控单元IO口保护中。

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LTKAK2-L系列SMD TVS二极管这款新产品有助于解决高浪涌额定值TVS二极管采用更大尺寸轴向引线封装的关键问题，这些封装与自动化PCB组装工艺不兼容。LTKAK2-L系列提供了一种紧凑的表面贴装解决方案，可保护交流和直流电源以实现高可靠性。

2023-05-31 - 新产品代理服务技术支持采购服务

【元件】Littelfuse新推TVS二极管5.0SMDJxxS-HRA系列，浪涌处理能力增加66%

Littelfuse推出全新5.0SMDJxxS-HRA TVS二极管系列。这些高可靠性TVS二极管经过精心设计、制造和筛选，可提供强大的过压保护功能，早期故障率极低，并且在连续浪涌事件中达到零衰减。

2022-11-04 - 新产品代理服务技术支持采购服务

SMDJ系列TVS二极管

该资料介绍了Littelfuse公司的SMDJ系列表面贴装瞬态电压抑制二极管（TVS）。这些二极管专为保护敏感电子设备免受雷电和其他瞬态电压事件的影响而设计。资料涵盖了产品的特性、最大额定值、热特性、电气特性曲线、焊接参数、物理规格和环境规格。

LITTELFUSE - TVS DIODES,TVS二极管,SMDJ64A,SMDJ20CA,SMDJ12A,SMDJ43CA,SMDJXXXCA,SMDJ85CA,SMDJ40A,SMDJ17CA,SMDJ6.0CA,SMDJ13CA,SMDJ36CA,SMDJ13A,SMDJ200CA,SMDJ70CA,SMDJ160A,SMDJ120A,SMDJ350A,SMDJ75A,SMDJ78CA,SMDJ11A,SMDJ51CA,SMDJ110CA,SMDJ51A,SMDJXXXXX,SMDJ24A,SMDJ48CA,SMDJ36A,SMDJ48A,SMDJ250CA,SMDJ9.0A,SMDJ90A,SMDJ10A,SMDJ22A,SMDJ40CA,SMDJ120CA,SMDJ18CA,SMDJ7.5A,SMDJ14CA,SMDJ200A,SMDJ6.5CA,SMDJ6.0A,SMDJ170A,SMDJ130A,SMDJ9.0CA,SMDJ10CA,SMDJ33A,SMDJ45A,SMDJ33CA,SMDJ75CA,SMDJ90CA,SMDJ170CA,SMDJ85A,SMDJ18A,SMDJ58A,SMDJ26CA,SMDJ400CA,SMDJ250A,SMDJ7.0CA,SMDJ180CA,SMDJ440A,SMDJ20A,SMDJ45CA,SMDJ22CA,SMDJ64CA,SMDJ60A,SMDJ60CA,SMDJ100CA,SMDJ300CA,SMDJ8.0A,SMDJ17A,SMDJ15CA,SMDJ400A,SMDJ100A,SMDJ43A,SMDJ11CA,SMDJ180A,SMDJ5.0CA,SMDJ30CA,SMDJ150CA,SMDJ28A,SMDJ6.5A,SMDJ16A,SMDJ5.0A,SMDJ8.5CA,SMDJ70A,SMDJ220A,SMDJ54A,SMDJ7.5CA,SMDJ78A,SMDJ350CA,SMDJ160CA,SMDJ30A,SMDJXXXXX-T7,SMDJ15A,SMDJ16CA,SMDJ58CA,SMDJ220CA,SMDJ150A,SMDJ440CA,SMDJ110A,SMDJ12CA,SMDJ54CA,SMDJ130CA,SMDJ28CA,SMDJ14A,SMDJ8.5A,SMDJ24CA,SMDJ26A,SMDJ SERIES,SMDJ300A,SMDJ8.0CA,SMDJ7.0A,VCC BUS,OTHER VULNERABLE CIRCUITS USED IN TELECOM, COMPUTER, INDUSTRIAL ICT EQUIPMENT,CONSUMER ELECTRONIC APPLICATIONS,I/O INTERFACES,I/O接口,VCC总线,用于电信、计算机、工业ICT设备的其他易损电路,消费电子应用

10/29/20 - 数据手册 - Revised: JC.10/29/20 代理服务技术支持采购服务

LITTELFUSE SMAJ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	品类	厂牌	Reverse Stand off Voltage Vʀ (Volts)	Breakdown Voltage Vʙʀ (Volts) @ Iᴛ MIN	Breakdown Voltage Vʙʀ (Volts) @ Iᴛ MAX	Test Current Iᴛ (mA)	Maximum Clamping Voltage Vᴄ @ Iᴘᴘ (V)	Maximum Peak Pulse Current Iᴘᴘ (A)	Maximum Reverse Leakage Iʀ @ Vʀ (µA)
SMAJ5.0A	TVS Diodes	LITTELFUSE	5	6.4	7	10	9.2	43.5	800