Hi everyone, I'm working with a Buck converter and I was wondering what should be the best duty cycle, I don't remember where I read that working lower than 50% is the best performance. At that time I didn't show to much interest about that because I was focused learning the general working, and the characteristic equations for the ripple current and inductance selection.
But now I'm interested on how to select the best duty cycle. Theoretically the output voltage depends by this equation. Vo = D*Vin. I did this chart to compare different input and different output voltages.
It can seen the more output voltage near the input voltage the Duty Cycle it's bigger. My common sense tells me that the bigger the Duty Cycle the bigger the on time by the switch, and the more the conduction looses.
Also at higher frequencies and a very low Duty Cycle we need a very high speed switch with a fast turn on and off.
So, in a real scenario when we need to manufacture a driver for a final product. Which is the better choice of the DC,
Lets say that I can chose or control the input voltage. And my output requirement is 55V I can decide.
See the above chart. What will be the best operation point. Duties above 50% or below?
Ty so much.
But now I'm interested on how to select the best duty cycle. Theoretically the output voltage depends by this equation. Vo = D*Vin. I did this chart to compare different input and different output voltages.
It can seen the more output voltage near the input voltage the Duty Cycle it's bigger. My common sense tells me that the bigger the Duty Cycle the bigger the on time by the switch, and the more the conduction looses.
Also at higher frequencies and a very low Duty Cycle we need a very high speed switch with a fast turn on and off.
So, in a real scenario when we need to manufacture a driver for a final product. Which is the better choice of the DC,
Lets say that I can chose or control the input voltage. And my output requirement is 55V I can decide.
See the above chart. What will be the best operation point. Duties above 50% or below?
Ty so much.
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