DIY flyback power supply on the CR6850
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- čas přidán 22. 08. 2024
- Hi all! In today's video I will tell you in detail and show you how to make a powerful flyback power supply with your own hands. It is assembled on a CR6850 chip. This is a compact but reliable PWM controller with adjustable frequency, high efficiency and low idle current consumption. The power of the converter is 20 watts, the output voltage is 5 volts, and the current it can consistently deliver for a long time is 4 amperes! In extreme mode, it can produce more, but not for long. I present this video as a technical guide to the CR6850; here I have collected the most important information about its circuitry and operating principle. In the future, I will build even more interesting blocks based on it, but I will not return to a detailed explanation in them.
Cloud link to the PCB file for the program Sprint-Layout:
cloud.mail.ru/...
Download program SprintLayout:
cloud.mail.ru/...
CR6850 chips can be purchased here:
alii.pub/67qj6l
Tin suction can be purchased here:
alii.pub/67qj3v
2N60 transistors can be purchased here:
alii.pub/67qjah
TL431 chips can be purchased here:
alii.pub/67qj8j
PC817 chips can be purchased here:
alii.pub/67qj7y
20100ct diodes can be purchased here:
alii.pub/67qiuj
The LCR-T4 radio component tester can be purchased here:
alii.pub/67qiyt
#circuit #led #diy #electronics #своимируками #светодиод #электроника #howtomake #powersupply #smps
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!!!
Fine explanation.
Thanks
Well explained gonna use some of it in my psup
thanks
The details are accurate and the explanation is interesting. I am grateful to you and your professional work👌
thank you for watching
perfect presentatipn, thx.
Thanks
Thanks for information. I want to learn and deep dive in the world of electronics
Thank you too for watching my videos.
Wow, this is an excellent video to learn the function of SMPS.
Thanks!!
Great details and superb explanation. The best video on electronic project so far. ♥
Thanks!!!
I like your explanation its very details
Thank you
Very good.
thanks
I have subscribed your channel yesterday. I found very impressive explanation of power supplies. Thx.
Thank you so much for the tutorial
Thank you for watching
Nice video great narration
Thank you!
Maravilloso, bien detallado.
Gracias
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
❤ Love from Bharat (India)
Thank you very much for watching from Kazakhstan.
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
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
M Robert in Uganda I want more lessons how can I do it brother I mean special lessons
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 ❤️❤️❤️
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
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.