【产品】ST型浪涌电流限制器,最大浪涌电阻小于1Ω
LITTELFUSE 旗下公司 U.S.Sensor推出的ST型浪涌电流限制器是一种经过特殊处理的NTC热敏电阻,适用于抑制开关电源和其他非高初始启动电源应用中的高浪涌电流。该器件的独特设计使其能够处理极高的电流和电压。在典型的电源应用中,浪涌电流限制器可以与滤波电容串联使用。
在施加初始电压时,由于其相对高的电阻,能将电流限制在可接受的水平,直到电容器被充电。之后,器件的电阻产生的压降基本上降低到可以忽略不计的水平。
图一 ST型浪涌电流限制功率热敏电阻实物图
对于浪涌电流限制器而言,器件能够通过的最大连续稳态电流,即直流或均方根交流。最高工作环境温度为65℃时,ST型浪涌电流限制器的最大稳态浪涌电流可保证器件正常工作;如果特定应用要求环境温度高于65℃,则可使用定制设计的器件。
浪涌电流限制器在最大稳态电流条件下的近似电阻即为最大浪涌电阻(RIMAX),这是浪涌电流限制器的一项重要参数。ST型浪涌电流限制器系列的最大浪涌电阻均小于1Ω。
图二 ST型浪涌电流限制器结构图
ST型浪涌电流限制器的特性
•NTC热敏电阻
•最大浪涌电阻均小于1Ω
•处理极高的电流和电压
ST型浪涌电流限制器的应用
•抑制开关电源
•非高初始启动电源
技术顾问:winthony
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阻断电压(VP)
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输入控制电流(mA)
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断态漏电电流A / B(µA)
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输出电容A / B (pF)
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封装类型
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CPC2317N
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固态继电器
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60
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16
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1500
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1
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1/1
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3/3
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5/10
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8-pin SOIC
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