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求推荐升压IC

Other Parts Discussed in Thread: TL494, UCC2808-2

输入是四节镍氢电池串联给摄像机1600UF/330V电容快速充电,要求拓扑最好是推挽电路,刚开始电容从0V升到330V时间最好5S以内。功率输出大概是35W,如果有数字充电模式也可以考虑。之前用的IC是MIC3809,现在想还有没有,比这效率更好的IC,佳能的摄像机闪光次数是300张,(四节镍氢电池充满到放电完)