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LM5022: LM5022的MOSFET的损耗计算

Part Number: LM5022

我使用WEBENCH® POWER DESIGNER进行电路设计,使用LM5022,设计参数是VIN =14-24V;Vout=50@2A,开关频率:200kHZ,Temp:60℃,Cout:680uF,推荐使用的MOSFET型号是FDWS86068-F085;WEBENCH® POWER DESIGNER计算出MOSFET的开关损坏和导通损耗分别是525mW和473mW;但是和我在LM5022数据手册里面推荐的计算公式计算出的相差很多,按照公式计算如下:Psw= 0.5 × VIN × IL × (tR + tF) x fSW=0.5x24x2x(6+7ns)x200kHZ=62.4mW,Pc== D × IL^ 2 × RDSON × 1.3   =0.52X3X3X14mRx1.3=85mW;想问下参考WEBENCH® POWER DESIGNER还是根据LM5022手册算出的数据呢??