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UCC21520-Q1: Gate Driver Output Resistor calculation

Part Number: UCC21520-Q1

Section "9.2.2.3 Gate Driver Output Resistor" contains formula such as

how did you get this value?

I have tried to replicate it and cannot get same result

as i understand value of 1.47Ohm || 5Ohm + 2.2Ohm+4.6Ohm should be calculated as parallel resistors?!

Rp = 1/1.47 + 1/11.8 = 1/(0.68 + 0.085) = 1.31Ohm

Ioa = V/Rp = 19.2/1.31 = 14.66A and it is not equal to 2.4 even close

How you got that value,

Thank you for you response,

Sincerely Artem.