I am not using diode as rectifying switch. I am using a GAN HEMT for main Control switch as well as a GAN HEMT for synchronous rectification in a simple buck converter. while generating PWM for Synchronas Rectifier Switch i am unable to understand what would be the best possible dead time for smooth transitionA GaN is fast. If the transistor switches in 5 to 10nS then you need to turn on the "diode" 10nS after the transistor turns off.
Then 10nS before you turn the transistor on the diode needs to be off.
Have you seen synchronas rectification using HEMT?
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by Ikimi .O