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急寻替代UC3843的DC DC管理芯片!!

Other Parts Discussed in Thread: UC3843, LM5160, LM5116, LM5022, LM3481

目前DC DC采用UC3843,单端,正激拓扑,24V输入,四路输出24V,5V,-5V等输出,功率在15W以内,但DC DC体积偏大,想寻找一款芯片替代UC3843,请推荐芯片型号和拓扑结构,使DC DC体积可以更小,效率可以更高,谢谢!