MAX17595ATE+: FAQ

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  • 应用笔记AN5504的原边吸收电路上,如何计算二极管的额定电压?

    如下图所示,当原边MOSFET N1导通时,D3的阳极与原边地之间的电压大概是0.2V,此时D3反向偏置,其阴极电压大于阳极电压;当原边MOSFET N1关断时,D3的阳极与原边地之间的电压为 VIN+2.5Vo/K,其中K为变压器副边绕组与原边绕组之比, Vo/K为输出电压通过变压器耦合到原边的电压,由于漏感的存在,选择2.5倍的Vo/K, 此时D3正向偏置,所以D3的阴极与原边地之间的电压大概是…

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