How to calculate MOSFET gate resistor value?

[@pentabular]

Thank you for including the Cgs capacitance! This is a helpful step for designing a resonant mode configuration for the MOSFET.

[@ElectronicsCircuitHubECH]

Glad you liked the video.

[@wilsonafuevu9036]

Thanks for this. I noticed that Ton time you used is 1ns, the data sheet does not state 1ns, please how did you get that?

[@KNOWLEDGE-uf2sd]

But generally we take 10 or 15 ohm resistor as gate resistance while doing hardware. I done the calculation as like you but i got a high value of gate resistance. Can you explain why it is so?

[@ElectronicsCircuitHubECH]

@@KNOWLEDGE-uf2sd you can join our hardware training class to understand more.

[@victorgu-g9f]

Why not Qg but 2*Qg，Qg should be the charge of the object driving voltage instead of using the maximum Qg

[@SurprisedDivingBoard-vu9rz]

You need rg to avoid short circuit. Rl is similar.

[@ElectronicsCircuitHubECH]

Correct 👍

[@ImtiyazKhan-2ic]

Thanks knowledgeable for me Thanks.Thanks

[@ElectronicsCircuitHubECH]

Your comments motivate me to produce such video. Thanks for your compliment.

[@biswajit681]

This is not the only criteria to select the gate resistor....you missed the most important aspects of selecting the gate resistor

[@ElectronicsCircuitHubECH]

Could you elaborate more about important aspect ?

[@biswajit681]

@ElectronicsCircuitHubECH gate loop is nothing but a RLC circuit, so this resistance need to be equal to the characteristics impedance or need to reduce the Q of the RLC loop.

[@ElectronicsCircuitHubECH]

@@biswajit681 if you could share any reference documents to me, it will read out. Thanks

[@nikhilmishra3308]

Looks like u r using wrong formula for calculating the current. 1st is that u don't need to charge the Cgs cap 2 times. 2nd thing when calculating gate current u missed the Cgd cap. The miller effect exists and is based on applied voltage across D-S. Also good luck with ur power loss at gate with the values u have found out.

[@ElectronicsCircuitHubECH]

Could you share Application note for same ?