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DRV8300: Dead time calculation

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Part Number: DRV8300

Hi

I am doing a design using the DRV8300DRGE and can't understand your formula for calculating the deadtime.

Referring to page 14 of the datasheet (SLVSFG5D – SEPTEMBER 2020 – REVISED MARCH 2022) it says that connecting a resistor to the DT pin sets the deattime according to the formula: -

RDT (kOhm) = Deadtime (ns) / 5

It also says that if the DT pin is left floating the deadtime is 200ns?

Your formula suggests, if you want 200ns dead time you need 40kOhms!

Similarly for 300ns, I need 60kOhms.

Should the pin be grounded for 200ns and the resistor increases the dead time?

Where am I going wrong?

Best regards

Clive


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