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Swithching regulator (Buck Converter) with LTSpice question

Discussion in 'Power Electronics' started by RobinLeblond, Oct 20, 2018.

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  1. RobinLeblond


    Oct 20, 2018
    Hello, I'm in the process of learning switching regulator and I'm using LTSpice as a simulator and teaching help. I found a video on YouTube explaining the SR, and I did exactly what it was demoed and didn't get the same results.

    Simply said, I getting the same result but with a 300mV at the output instead of 5.6V, why ?

    Here is the link of the video :

    In attachment, you will find my LTSpice schema and a few screenshots.

    Thanks a lot!

    Attached Files:

    Last edited: Oct 20, 2018
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    That is rather logical as you've set D=0.05 whereas in the video it is D=0.5.
    1/10 duty cycle -> 1/10 output voltage (roughly).

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