输入220AC,负载5W,输入功率15W,输出电压15V正常。运行20s发现吸收电路发热,MOS也有些温热。请帮帮我。变压器为手绕,开气隙方法为两侧磁柱垫A4纸,三明治绕法。变压器参数见图1
1、原理图
2、Vds波形+Vgs波形
3、Vds波形+Vgs波形(开通细节)
4、Vds波形+Vgs波形(关断细节)
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