您好!请问在基于UCC28781的反激式变压器设计中,如何选取最小工作频率以确定变压器原边电感量?因为UCC28781的工作频率随负载而变化的,我不知道应该如何选择最小开关频率,期望解答,谢谢!
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HI
按照datasheet描述,芯片的正常工作频率会是最小频率的2~3倍,按照这个思路,如果500kHz作为正常工作频率,建议最小工作频率设置在250kHz.