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看见一款TI芯片，小功率的5W以内，电路无辅助绕组
问：怎么设计变压器才能比较简单过EMC
1：在初级绕完后加绕一层屏蔽层，再绕次级
2：三明治，初级绕一半，接着绕次级，最后在绕另外一半初级
哪种好？电路上都加了Y电容
第二种更好，耦合会更好
