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BQ76940: Ron value checking for FET driver

Part Number: BQ76940

Dear Teams,

Based on datasheet, we have tFET_on is 200us typical value and 250us maximum value with load capacitance 10nF, measured from 10% to 90% of VFETON. Based on first order RC filter circuit, we can easily calculate the Tr (rising time from 10% to 90%) equal to RC*In9, which is equal to 2.197*RC. Then, we can found out the Ron_typical value is 9.1Kohm and Ron_maximum value is 11.38Kohm. However, it shows the nominal value of Ron is 5Kohm on the training video https://edu.21ic.com/video/3259 slide 31 showing below. Could I check with you whether my calculation is wrong or the slide is wrong?

Thanks!

Dylan