Hi,
Good Day. I have a customer who wants to know the formula of the calculation of COSS_QH_T, COSS_QL_T on the excel file.
I hope you can help us with his query. Thank you very much.
Best Regards,
Ray Vincent
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Hi,
Good Day. I have a customer who wants to know the formula of the calculation of COSS_QH_T, COSS_QL_T on the excel file.
I hope you can help us with his query. Thank you very much.
Best Regards,
Ray Vincent
HI Ray,
Since the Coss of FET is NON-linear , The method used in the calculator is integrating the coss curve . the integration is done by discretizing the Coss curve calculating the area of each segment , and then summing the areas together .
formula of calculation : ((Coss_big * Vxl) + (Coss_small * (Vds-Vxl)))/Vds , where Vds =VIN _Nps*Vout, others please refer to curve in the calculator.
Thanks