请问,输入直流37-57V, 输出为5V,9V,12V,15V,20V@3A,最大功率为51W,最高的效率为92%,如何保证只要一级转换而又有高效率?
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hi,
请查看TI 类似于LM5160一类的fly-buck芯片(不同于fly-back),只需控制原边电压(满足你的一级转换需求),副边电压根据匝数确定。
Hi
一级来做,变压器5个绕组, 效率是难以达到92%的.
UCC3813,或者你用WEBENCH软件直接自己挑选符合你需求的
https://webench.ti.com/webench5/power/webench5.cgi?origin=pf_panel&VinMin=90.00&VinMax=265.00&O1V=5.00&O1I=1&base_pn=UCC28740&AppType=None&op_TA=30&source=AC&line_fsw=60&lang_chosen=zh_CN&optfactor=3