在MOS管参数中,有Td(on),T(rise),Td(off),T(fall),这些参数有什么用,以及他们的测试条件。还有二极管的反向恢复时间。在同步降压电路中,应该如何选择这些值。
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你可以结合你的电流规格以及你上面提到电压的规格考虑D、S的耐压Vds和continuous drain current的电流Id及他们的降额,再初步地选择一个Qg和Rdson,按照以下文档初步地计算出电路的损耗,迭代验证使之满足损耗小于5%的要求。
损耗计算文档- www.ti.com/.../slpa009a.pdf
As to the MOSFET parameters, may this paper will help you.
"Design and Application Guide for High Speed MOSFET Gate Drive Circuits"