Great video Den. Helpful to people like me with lesser academic background. Subscribed happily & will eagerly look for more videos you have created & will create. Will you elaborate more on some details like how OV, overload protection works & other fine points not usually found in text books! Thanks for a great video - to say the least!
The values shown for the current sense resistors at around 22:50 make no sense. The energy stored in the inductor in each cycle is 0.5 * L * i² (i is peak current in inductor, L is the inductance of the "primary" winding in henries, energy in joules) The power delivered is equal to that energy times the frequency. The important point is that the power throughput is proportional to the square of the peak inductor current. At 30 watts the peak inductor current would be 3^0.5 = 1.73 times the current at 10 watts. If 1 ohm allows 10 watts, 0.58 ohms should be required for 30 watts.
when you increased the output Amps, why didnt the overload shutdown the oscillation through the current resistor, because i thinks maybe the current resistor is not working properly
When the IC starts to be powered from the coil, electricity will also continue to be supplied to the IC via the charging capacitor at the bottom. Doesn't this constitute two power sources for the chip over voltage? How was this case dealt with? Thank you.
I have some doubt about winding of transfarmar. What is dot notation and how to wind wire , anticlockwise i. e right to left or left to right i.e clock wise. How does effect the polarity on winding i.e + on top or + on bottom. Thx
Current is supplied to the beginning of the primary winding (this is +). It is marked with a dot. Then, after a pulse, the current exits from the opposite ends of the windings. Where there are no points. That is, the current flows in the opposite direction. Therefore, it is necessary to take into account where the beginning and end of all windings are relative to the primary winding.
You really know how explain and I've just subscribed. I really need help with DC to DC boost converter of 120w 5A from 12v to 30v from how to wind the inductor to mosfet choice and other components.
Great video Den. Helpful to people like me with lesser academic background. Subscribed happily & will eagerly look for more videos you have created & will create. Will you elaborate more on some details like how OV, overload protection works & other fine points not usually found in text books! Thanks for a great video - to say the least!
Thanks!!!
Wow, this is an excellent video to learn the function of SMPS.
Thanks!!
The details are accurate and the explanation is interesting. I am grateful to you and your professional work👌
thank you for watching
Good video lecture. Lovely details. Thanks for sharing.
I have subscribed your channel yesterday. I found very impressive explanation of power supplies. Thx.
Thanks for information. I want to learn and deep dive in the world of electronics
Thank you too for watching my videos.
I like your explanation its very details
Thank you
Nice video great narration
Thank you!
It can't be better explanation and it's clear from comments and the replies that follow
Thank y very much and good luck to you
Thank you so much for the tutorial
Thank you for watching
Great details and superb explanation. The best video on electronic project so far. ♥
Thanks!!!
Maravilloso, bien detallado.
Gracias
❤ Love from Bharat (India)
Thank you very much for watching from Kazakhstan.
That's mean you are from South Africa man
The values shown for the current sense resistors at around 22:50 make no sense.
The energy stored in the inductor in each cycle is
0.5 * L * i²
(i is peak current in inductor, L is the inductance of the "primary" winding in henries, energy in joules)
The power delivered is equal to that energy times the frequency.
The important point is that the power throughput is proportional to the square of the peak inductor current.
At 30 watts the peak inductor current would be 3^0.5 = 1.73 times the current at 10 watts. If 1 ohm allows 10 watts, 0.58 ohms should be required for 30 watts.
What I'm saying here is that these numbers are just an example. To understand the meaning of the work
Fine explanation.
Thanks
Do you want to connect all those terminal indicated by the black arrowheads to the negative terminal??? Please Answer me. Thank you 😊😊😊😊😊
Yes, look at the capacitor "C6". One terminal is connected to the high-voltage negative terminal, and the other to the low-voltage negative terminal.
@@Den_Electro_channel ❤️❤️❤️
when you increased the output Amps, why didnt the overload shutdown the oscillation through the current resistor, because i thinks maybe the current resistor is not working properly
perfect presentatipn, thx.
Thanks
When the IC starts to be powered from the coil, electricity will also continue to be supplied to the IC via the charging capacitor at the bottom. Doesn't this constitute two power sources for the chip over voltage? How was this case dealt with? Thank you.
The current through the high resistance resistor is very small. It charges the capacitor, but the main current comes from the winding.
Hi. Why the primary is winded with 2*100 turns and not 1*200? Why is it necessary to split into half? Thanks!
to increase electromagnetic coupling between windings. This way there is less energy loss in the core and the output voltage is better maintained
How did you calculate primary and secondary truns
using the program "flyback 8.1"
Very good.
thanks
M Robert in Uganda I want more lessons how can I do it brother I mean special lessons
Can you please explain why we need resistor R12 1K? Looks like a SMPS default load but not clear why.
Flybacks, as many other SMPS, don't like to work without load. So it is just a dummy load to prevent possible instabillity when no load is connected
@@dpush123 Thanks
Well explained gonna use some of it in my psup
thanks
can we use 5 v charger pwm ic
to make 12 v smps
yes
@@Den_Electro_channel tnx
where do I ger PCB lay out?
The link to the board layout can be downloaded from the link in the description
I have some doubt about winding of transfarmar. What is dot notation and how to wind wire , anticlockwise i. e right to left or left to right i.e clock wise. How does effect the polarity on winding i.e + on top or + on bottom. Thx
Current is supplied to the beginning of the primary winding (this is +). It is marked with a dot.
Then, after a pulse, the current exits from the opposite ends of the windings. Where there are no points. That is, the current flows in the opposite direction. Therefore, it is necessary to take into account where the beginning and end of all windings are relative to the primary winding.
You really know how explain and I've just subscribed.
I really need help with DC to DC boost converter of 120w 5A from 12v to 30v from how to wind the inductor to mosfet choice and other components.