【应用】1pF~12µF、10VDC~1000VDC片式多层陶瓷电容器CEC系列助力海上军事设施中的电子系统设计
电容器作为电子系统中常用的元器件,具备储能交换、隔直通交(旁路/耦合)、鉴频滤波以及浪涌电压抑制等功能。而片式多层陶瓷电容器(MLCC,Multi-layer Ceramic Capacitors)作为电容器的一种,凭借可靠性高、比容大、使用寿命长、体积小以及成本低等优势,被广泛应用在军事领域。对于海上军事设施中的电子系统(如武器控制系统、雷达系统、军事通信系统等)设计,为了保证系统的高可靠性,通常要求元器件具备耐高压、绝缘电阻高以及可靠性高等优势。
针对此,对于片式多层陶瓷电容器解决方案的选取,本文推荐采用EXXELIA公司提供的CEC系列片式多层陶瓷电容器,电容值范围为1pF~12μF,工作温度范围宽至–55°C~+125°C,具备出色的环境适应能力。同时,该系列的电介质提供NPO、BX、2C1以及X7R四种,对于NPO、X7R电介质的电容器,其额定电压(URC)为10VDC~1000VDC,对于BX、2C1电介质的电容器,其额定电压为10VDC~500VDC。对于NPO电介质的电容器,在不同额定电压下的介质耐压为2.5URC(URC≤500VDC)、1.6URC(URC=1000VDC)、1.5URC(URC=1000VDC);对于BX、2C1电介质的电容器,在不同额定电压下的介质耐压为2.5URC;对于X7R电介质的电容器,在不同额定电压下的介质耐压为2.5URC(URC≤500VDC);优异的耐高压特性,可满足海上军事设施的系统设计要求。
图2 不同尺寸(以0402/0403/0603为例)下的尺寸、电容值以及额定电压信息
值得一提的是,CEC系列提供多种不同的尺寸( 0402 ~ 3040),例如,0402/0403/0603对应的尺寸信息、电容值以及额定电压信息如图2所示。另外,CEC系列的绝缘电阻可高达100000MΩ,绝缘性能好,安全可靠,可以适应海上军事设施苛刻的工作环境。对于BX、2C1以及X7R电介质的电容器,在整个工作温度范围内,并且在没有施加直流电压的情况下,其最大ΔC/°C为±15%;而NPO电介质的电容器的温度系数为(0±30)ppm/°C,温度稳定性好。该系列的订购信息如图3所示,更多的产品解决方案和元器件的在线采购可以在世强官网搜索获取。
图3 订购信息
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可加工PCB层数:4~32层,加工板材:多层板/HDI板/FR4板/高频板/高速板/高温板/铜基板/铝基板/陶瓷基板/软硬结合板,成品尺寸:3~1100mm,板厚:0.15-80mm,最小孔径:0.1mm,铜厚:最高14oz。
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可定制OGS一片式电容屏,G+G电容屏,G+F电容屏,G+F+F电容屏,尺寸范围:1”~21”,单层产品厚度:0.55mm~2mm,可按客户要求在产品上附加防反射,防指纹,多色丝印,钻孔磨边,2.5D导圆角等工艺。
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