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大家好：
我使用ucc2893做有源嵌位反激，100-240Vac输入，正负70VDC 输出。反馈回路是通过采样+70Vdc那一路的电压，当-70带载时（+70V空载）时，-70V电压掉得很厉害，有什么好的方案可以改善这个问题吗？谢谢！
