开关电源模块因为其小型化、轻量化及高效率，相应的要求电解电容小型大容量化、耐纹波电流、高频低阻、高温长寿及更适应的高密度。高频低阻抗是指电容器耐纹波电流能力强，且自身内阻小，相对普通的而言，用在电路中产品自身不易发热而导致提前失效。
Due to its light and high the of the power are small and large high and low long life at high and more high . High and low means that the has strong to and its is small. the used in the is not easy to heat and lead to .
开关电源输出端用的滤波电容与工频电路中的不一样，在工频电路中用作滤波的普通电解电容器，其上的脉动电压频率仅有***Hz，充放电时间是毫秒数量级，为获得较小的脉动系数，需要的电容量高达数十万微法，因此一般低频用普通铝电解电容器制造目标是以提高电容量为主。
The used in the of power is from that in power . The pulse of mon used as in power is> 开关电源中作为输出滤波用的电解电容，由于大多数的开关电源工作在方波或矩形波的状态，含有及其丰富的高次谐波电压与电流。
The used as in power and most of the power work in the state of we or we.
其上锯齿波电压的频率高达数十千赫，甚至数十兆赫，它要求和低频应用时不同，电容量并不是主要指标，衡量它好坏的是它的阻抗频率特性。
The of is as high as tens of or even tens of which is from that in low . is not the main but its is the of its .
开关电源输出整流的电解电容，要求其阻抗频率特性在***kHz甚至5**kHz时仍不呈现上升趋势。电解电容器ESR较低，能有效地滤除开关电源中的高频纹波和尖峰电压。
It is that the of the with from power does not show an trend at ***kHz or even 5**KHz. The ESR of is low, which can the high and peak in power .
普通电解电容器在***kHz后就开始呈现上升趋势，用于开关电源输出整流滤波效果相对较差。
The mon begin to show an trend after ***kHz, and the is poor when to the and of power .
电源模块的输出电容一般是采用高频低阻，因为开关电源整流输出的是高频直流脉冲信号，必须要用高频低阻电容来滤波，这样才能降低电容自身损耗，不然电容长时间工作后会爆裂漏液。
The of power is high and low the of power is high DC pulse it must be by high low so as to the loss of the will burst and leak after a long time of .
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