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精读干货 | 电源外围设计之冲击电流抑制

精读干货 | 电源外围设计之(zhi)冲击电流抑制

开(kai)关电(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)在应用(yong)时(shi)(shi)(shi),可能需要(yao)输(shu)入(ru)(ru)端的(de)主电(dian)(dian)(dian)(dian)(dian)(dian)网提供(gong)短时(shi)(shi)(shi)间的(de)大电(dian)(dian)(dian)(dian)(dian)(dian)流(liu)脉冲,这种电(dian)(dian)(dian)(dian)(dian)(dian)流(liu)脉冲通常被称为“输(shu)入(ru)(ru)冲击(ji)电(dian)(dian)(dian)(dian)(dian)(dian)流(liu)”。输(shu)入(ru)(ru)冲击(ji)电(dian)(dian)(dian)(dian)(dian)(dian)流(liu)给主电(dian)(dian)(dian)(dian)(dian)(dian)网中的(de)断(duan)路器和其(qi)它(ta)熔断(duan)器的(de)选(xuan)择造成了一定(ding)麻烦:断(duan)路器一方面要(yao)保(bao)证在过(guo)载时(shi)(shi)(shi)熔断(duan),起到(dao)保(bao)护作(zuo)(zuo)用(yong);另一方面又(you)必须(xu)在输(shu)入(ru)(ru)冲击(ji)电(dian)(dian)(dian)(dian)(dian)(dian)流(liu)出现时(shi)(shi)(shi)不能熔断(duan),避免误动作(zuo)(zuo)。输(shu)入(ru)(ru)冲击(ji)电(dian)(dian)(dian)(dian)(dian)(dian)流(liu)也会产生输(shu)入(ru)(ru)电(dian)(dian)(dian)(dian)(dian)(dian)压波(bo)形(xing)塌陷,使电(dian)(dian)(dian)(dian)(dian)(dian)网的(de)供(gong)电(dian)(dian)(dian)(dian)(dian)(dian)质量变差,进而影响其(qi)它(ta)用(yong)电(dian)(dian)(dian)(dian)(dian)(dian)设备的(de)工作(zuo)(zuo)。为确保(bao)开(kai)关电(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)的(de)供(gong)电(dian)(dian)(dian)(dian)(dian)(dian)稳定(ding)和电(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)本身的(de)安(an)全,电(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)应用(yong)的(de)外(wai)围电(dian)(dian)(dian)(dian)(dian)(dian)路设计尤为重要(yao)。

2021-10-20

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