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85问答库 > 开关电源CCM模式的输入峰值电流怎样求的？求讲解过程……

开关电源CCM模式的输入峰值电流怎样求的？求讲解过程……

2025-03-17 05:17:07

推荐回答（2个）

回答1：

Ipk = Iiavg + Iramp / 2
输入的平均电流+ 斜坡电流的一半
如果纹波率取 0.4，那么
Ipk = Iiavg ( 1 + 0.4/2) = 1.2 Iiavg

回答2：

开关电源一般都需一个磁（铁）芯变压器作变压输出，次级绕组的输出脉冲极性与初级相同时谓之正激，相反时谓之反激。
从初次级的相位关系就可以确定它是正激反激。一个正激的电源，对调次级的输出线头就成了反激。初级占空比相同的脉冲，正激反激都一样，初级占空比不相同时，反应到次级的输出电压和带载能力都有区别。
供参考

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