85V-260VAC to 5VDC-2.5A Flyback Switching Power Supply
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- Опубликовано: 26 авг 2024
- 85V-260VAC to 5VDC-2.5A Flyback Switching Power Supply
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Altium Designer + Legal License (Free): www.altium.com...
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Altium 365: www.altium.com...
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OctoPart: octopart.com
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Article: www.pcbway.com...
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Gerber/PCB Order: www.pcbway.com...
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Other Videos: bit.ly/2N9OlPa
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The key part of any electronic device is the power supply. Any instability or malfunction of the power supply part causes the device to stop working or demonstrate weird behavior. In this article/video, I introduced an AC-to-DC flyback Switching power supply that converts 85V-260VAC to 5VDC-2.5A, which can be used in various applications. The 5V selection for the output makes it friendly for linear regulators that convert 5VDC to lower voltages.
The maximum power delivery of this power supply is around 12W, which means it can handle 2.5A at 5V output. The controller chip is DK1203, which does not need any external supply, a startup resistor, or an auxiliary winding on the transformer. The ferrite core of the transformer is EE20. A potentiometer allows you to adjust the output voltage and set it exactly at 5.0V.
To design the schematic and PCB, I used Altium Designer 23 and shared the PCB project with my friends for feedback and updates using Altium-365. The fast component search engine, Octopart, proved invaluable in quickly obtaining component information and generating the Bill of Materials (BOM). To ensure high-quality fabricated boards, I sent the Gerber files to PCBWay.
I tested the board for voltage drop, current delivery, and output noise. I used Siglent SDL1020X-E DC Load and Siglent SDS2102X Plus oscilloscope to perform all tests. I am confident that building this circuit enhances your knowledge regarding switching power supply design, except for using it for real applications.
85V-260VAC to 5VDC-2.5A Flyback Switching Power Supply
thumbs up
Thanks
The PCB layout is cute ❤
Thanks
Transformer looks so safe no lightning can break insulation between primary and secondary.
Yes, I designed it in a way to dampen any criticism :-). I will upload the article in the next 1-2 days.
Excellent job.
Thank you very much!
thank for sharing!
I have a pulse transformer with parameter: ***N1 [4-5] 0.15 / 160T, N2 [6-10] /0.35/11T,N3 [1-2] 0.15 / 14T cross***
It has 2 secondary winding, how can I use it in this circuit?
how much is the inductance of the primary in your transformer?
how much is the inductance of the primary in your transformer?
@@MyVanitar Sir,
inductance as: Lp = (4-5) 2.50mH / ± 5%
and it is PC40 Core
@@thanhcong9278 compare this with my calculations. if the primary value is close enough, the secondary winding affects the output voltage and current. I suggest you wind it yourself if you want to learn
@@MyVanitar Yes. Thank you for your help!
If we make our second winding 6 turns, 5 volts output voltage multiplied by 6, we have a reflected voltage of 30v, and shouldn't this value be between 90 or 100? A reflected voltage of 30v futilely increases the power of the snabber circuit. Can anyone help ?
Do you mean the snubber would not tolerate the reflected voltage? I think the reflected voltage is at least 80V. I should check the snubber circuit, but before that, I am sure it is not lower than 80V or something like that
Isn't there a small mistake? At the USB C Port shouldn't those be 10k Pull Up resistors to VBUS?
Do you mean CC1 and CC2 should be pulled up with 10K resistors?
@@MyVanitar yes exactly
Oh yes, damn it, you are right, this is the charger side, this won't make any problem for many devices but a cellphone and similar devices won't charge. thank you very much. big like
files are updated now, schematic, Gerber and BOM
karet doroste hesam jan
Thank you bro