xwj讲得很清楚,支持一下。可以使用独立的2个电感,也可以使用1个耦合电感,其实就是变压器。使用变压器节省PCB空间、还有节省成本。L1和L2上的电压电流都同幅值同相位。看下面的电流波形。
国半的pdf里面这样说:
The two inductors can be wound on the same core since the same voltages are applied to them throughout the switching cycle. Using a coupled inductor
takes up less space on the PCB and tends to be lower cost than two separate inductors.
一篇设计指南,很详细,这里是全文下载=>
|