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关于PC 电源磁放大以及耦合Buck 电感的设计!

大家好啊,请问下高工们,现在在计算一个PC 的电源,其中3v3 路是5V 端变压器绕组接一个磁放大来做的,然后在接Buck 的电感,想知道这时的电感的电流时什么样的啊?用表达式把波形跑出来是怎么样的?