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现将我的技术参数列出如下:输入电压:230V正负15%,输出12V,0.5A,变压器采用EE13,变压器参数:N1=150T,N2=23T,电感量2.1mH,气隙长度0.2mm,三层绕制,
现在R1取值2.7K,R2取值300