Really glad UA-cam recommended your channel when I searched for "Buck Converters". New subscriber. Well explained, clearly illustrated. I love the simulator too! It's now in my toolbox.
Good Stuff. One question. How do we control the gate of the MOSFET. Do we use some MCU for this job. Also if the load changes then there needs to be some feedback system to change the duty cycle of the MOSFET. How do we apply Laplace Transform to this circuit. Asking this because a interviewer asked me this question. Can you Please make a video on these Topics. Thanks
We use an integrated circuit to control the gate of the MOSFET - link to a video on them here: ua-cam.com/video/B7wOFzCd6LA/v-deo.html It is a common misconception that the duty cycle is dependent upon the load, but it is not. If the load changes, the only thing that changes is the average current flowing through the inductor.
@@RGBEngineering I give it some thought you are right. Resistor is used to limit current if the Voltages remain the same then it will only allow same current to pass throught it no more. V /R = i R is not changing and V is not changing. So current(I) will remain the same Thanks
I want to make a device ( or buy one already made ) to take a 12 volt dc supply ( from p.v. solar panels or wind turbine generator ) and turn it into 2 volts dc, with the highest amperage possible to split water into hydrogen and oxygen gasses with out a lot of wasted heat in the power supply. Is a Buck converter the best choice ?
The changes in current can be approximately linear, right? I think an LRC circuit will always produce a logarithmic current curve, it would be more pronounced if for example the duty cycle switching freq. was too slow.
I guess you missed the logic, when mosfet switches off, inertia current in inductor changes its direction and voltage spike happens which evens out by capacitor.
Really glad UA-cam recommended your channel when I searched for "Buck Converters". New subscriber. Well explained, clearly illustrated. I love the simulator too! It's now in my toolbox.
Awesome, thank you!
Really good, that was very helpful
Glad to hear!
Good prep for understanding everything about buck converters
thank you :)
great video! touching on your eureka moments really helped me!
I'm so glad!
i'm glad i watched this. super helpful in understand the circuit.
Glad it was helpful!
Good Stuff.
One question. How do we control the gate of the MOSFET. Do we use some MCU for this job. Also if the load changes then there needs to be some feedback system to change the duty cycle of the MOSFET. How do we apply Laplace Transform to this circuit. Asking this because a interviewer asked me this question. Can you Please make a video on these Topics.
Thanks
We use an integrated circuit to control the gate of the MOSFET - link to a video on them here: ua-cam.com/video/B7wOFzCd6LA/v-deo.html
It is a common misconception that the duty cycle is dependent upon the load, but it is not. If the load changes, the only thing that changes is the average current flowing through the inductor.
@@RGBEngineering I give it some thought you are right. Resistor is used to limit current if the Voltages remain the same then it will only allow same current to pass throught it no more.
V /R = i
R is not changing and V is not changing. So current(I) will remain the same
Thanks
wow that was really amazing. I hope you stick to the series you start not like other youtubers. that would be really helpful. definitely subbed
I already have several videos scheduled for release, so my plan is do definitely stick to the series :)
What switches the mosfet on and off?
Great question, that would be the regulator IC. There will be a video all about those soon!
I want to make a device ( or buy one already made ) to take a 12 volt dc supply ( from p.v. solar panels or wind turbine generator ) and turn it into 2 volts dc, with the highest amperage possible to split water into hydrogen and oxygen gasses with out a lot of wasted heat in the power supply. Is a Buck converter the best choice ?
I'm working on a video about that, so stay tuned!
how does the switch(mosfet) alternate rapidly, do i need to use an external clock like a 555 timer ic?
the MOSFET is controlled by a device known as a regulator IC. I made a video that talks about them: ua-cam.com/video/B7wOFzCd6LA/v-deo.html
The changes in current can be approximately linear, right? I think an LRC circuit will always produce a logarithmic current curve, it would be more pronounced if for example the duty cycle switching freq. was too slow.
Yes, it is okay to linearly approximate the changes in current.
I guess you missed the logic, when mosfet switches off, inertia current in inductor changes its direction and voltage spike happens which evens out by capacitor.
That was meaningless word salad. How about you comment on something you actually know about!