Sorry, but no... In a high-power circuit they can be critical. TI says:The values of those two resistors are not critical, they usually don't do much. I would try 20 or 22 ohms, which are typical values for gate resistors.
Thanks for posting that app note - that's one to add to my collection - very useful!More info on the subject here
True, but they aren't needed as the drive is active low & high...Gate to Source resistors need to go G to S and not to ground. See R212.
Because you never know if it is just a representative diagram from which they have been omitted for clarity, or whether the damping resistance is being provided by a particular sort of driver IC or elsewhere in the driving circuit.Why do you add resistors to gate when Texas doesn't even have them on their circuits?
The example on the front page of the data-sheet is labelled " Simplified Application Diagram "! The need is dependent on many factors including board layout. The example layout in the data-sheet shows R6 and R8 clearly as gate resistors; they clearly listened to you and made adjustments to their board ...Why do you add resistors to gate when Texas doesn't even have them on their circuits?
That's what I was typing, "add zero ohm resistors and if you have problems, then at least you can do something" No need for resistors unless you have a reason, which you don't know before testing it out.Because you never know if it is just a representative diagram from which they have been omitted for clarity, or whether the damping resistance is being provided by a particular sort of driver IC or elsewhere in the driving circuit.
The inescapable fact is that there must be some damping resistance in the circuit somewhere or it will oscillate at frequencies too high to be seen on an average scope, and the result will be a number of unexplained failures.
You left out much in your quote. I specially advised to add zero ohm resistors as option if you need to rework your circuit.The example on the front page of the data-sheet is labelled " Simplified Application Diagram "! The need is dependent on many factors including board layout. The example layout in the data-sheet shows R6 and R8 clearly as gate resistors; they clearly listened to you and made adjustments to their board ...
If you look in the supporting "using the TPS40195 evaluation module" its mentioned and the worked example shows gate resistors as per spec below.