Hello, The pin 5 of IC1 (MCP6002) is connected to pin 2 of XL4016 right? and another question is the R1 neccesary? (in schematic is says 0R but in the phsyical pcb exist too)
Excellent video! I have already bought the PCB's from PCBway and all the components are ordered, but I would highly appreciate some info about what type of core and wire you have used for the 47uH inductor L1 and the number of windings. Thanks. I am really looking forward to build this amazing power supply.
Thanks! I have offered some tips in the article, so please double check that. White-Yellow cores are made of iron powder, they are better, however you are not bounded to use them. you can use black torrid cores as well. the hole diameter of the inductor pins on the PCB is 1.3mm. so maybe you can use a thick 1mm wire, or 2*0.5mm wires or 3*0.4mm wires. at the end, 47uH is okay. it does not need to be very accurate. something around this number is fine
Since the users will not use identical cores and wires, it is up to them to select the cores and wires to match 47uH, using an LCR meter. even if you have a standard 100uH torrid core, just open half of the windings to get around 47uH.
Firstly thanks a lot for your project. Excellent work ! . As a matter of fact i was looking for a working circuitry for indicating cc /cv modes by leds, in order to use it on a buck converter based on tl494. BUT in your schematic it is not shown the connection of IC1 ( MCP6002) PIN 5 . PLEASE CLARIFY CONNECTION OF IC1 PIN5 . . Many thanks in advance.
No, this is a buck converter, which means the output is always lower, what you want is a buck-boost, I will publish this also in the future, so subscribe to get notified
The title is like that because 1.2V in 30V is nothing and it is written in a generalist form, however, in the detailed explanation, it is written that the minimum is 1.2V. To start from 0, it just needs a small circuit tweak, however, there are rare scenarios that below 1V is necessary. So I decided not to go for it for this circuit that is intended for power applications, however, I'll do it for the next buck design, no worries.
@@MyVanitar I didn't mean it's bad. Heck I don't remember when I ever needed less than 1.5V on my psu. If need ever arises for anything below that I can always put a hard current limit and let the voltage sag to zero if required.
My question is how fast can it limit current, because you have large capacity like 1500uF at the output. Suppose it is set to 30V. I limit the current to 10mA. Then I connect NanoPoint-0201 Series LED. Will it survive? I would like to see a current graph from your beautifull oscilloscope for that case.
Good question, if you want to have a quick response, yes, you should decrease the output capacitors, because they cause delay, however, if the output noise is important, you have to make a balance between these two. My suggestion for the loads like LED is not to go very high in voltage or reduce the capacitors. That's why LED power supplies don't care that much about ripple and noise, current limit and the peak current are more important.
@@MyVanitar It is not for driving LED's, but to indicate the sensitivity of small devices if one uses this huge power supply as a lab bench. I took this small LED just as an example. The current limit only works after the stored energy (up to 30V) in the capacitors flowed out unregelated... Cannot there be something like an automatic quick discharge of the capacitors if the voltage has to drop for current limiting? Or quickly switch to a small capacitor?
@@geerthospers5977 For your mentioned reason, the laboratory power supplies are linear because the output noise is low and they don't need to use large capacitors at the output, however, they are not efficient, but the best choice for sensitive loads and "laboratory" use. if your load is not sensitive to noise, just reduce the output capacitors, however for a general solution, maybe an inrush current limiter would be more useful. so you would connect your sensitive loads with a limiter. However, even for my own lab power supply, I always care about the voltage. The main benefit of CC in the "general" applications is not to leave the voltage as it is, however, is to keep the current limited, for example in the case of charging a lithium-ion battery. We "set" the voltage at 4.2V, BUT, limit the current to prevent the battery from exploding.
For efficiency and lower ripple one can use a SMPS preregulator and then a Low Drop linear regulator. Better the low drop should track the SMPS to maintain the least voltage needed for regulation. In that case, say a 0,5 volt drop at 7Amps would produce around 4Watts of loss.
LGND means the load's ground, because the shunt resistor is in series with the output ground, it means the input ground and output ground are NOT identical, if you short them, the current sense part will not work
@@MyVanitar Oh cool thank you so much. So in this case, both GND and LGND connects together and there are actually the same thing right ? Connects via the shunt resistor
As I mentioned, they should NOT be connected to each other. it is pretty clear. This method is called the low side current sensing, where a shunt resistor is placed on the ground line. You can read about this online (low side current sensing)
nothing bad, you will get lower noise at the output, however, it is recommended to add that capacitor near your load because power wires introduce some noise themselves.
Constant AC voltage? Why not using a transformer. 220V to 12V or 24V transformer. if Your load consumes 1A, then use a 1.5A or 2A transformer. then the voltage will not drop
@@RehanKhan-nc6bf So No, in this case, the output will be reduced. You will need an AC regulator. I will talk about this in the future, however, I can not guarantee the time
when you ask this question, I realize that you haven't watched the video completely. I publish an article (with a more detailed description) with each video that you can access through a link in the video description. Please check the article. There is a place where you can order the PCB.
@@Chanchan1-k7q Yes, you can use TS2937CW50 (SOT-223, 5V regulator), however, I think you can not insert 30V to its input with some safety margin. I did up to 28V. Datasheet says up to 26V. check the datasheet.
![12V-7A AC to DC Switching Power Supply [SMPS]](http://i.ytimg.com/vi/etXycWuu9Gk/mqdefault.jpg)
![12V-7A AC to DC Switching Power Supply [SMPS]](/img/tr.png)
Hello, The pin 5 of IC1 (MCP6002) is connected to pin 2 of XL4016 right? and another question is the R1 neccesary? (in schematic is says 0R but in the phsyical pcb exist too)
Hi, 5 to 2 (FB pin) is connected. R is a zero ohm or a Jumper. of course it is necessary!
Excellent video! I have already bought the PCB's from PCBway and all the components are ordered, but I would highly appreciate some info about what type of core and wire you have used for the 47uH inductor L1 and the number of windings. Thanks.
I am really looking forward to build this amazing power supply.
Thanks! I have offered some tips in the article, so please double check that. White-Yellow cores are made of iron powder, they are better, however you are not bounded to use them. you can use black torrid cores as well. the hole diameter of the inductor pins on the PCB is 1.3mm. so maybe you can use a thick 1mm wire, or 2*0.5mm wires or 3*0.4mm wires. at the end, 47uH is okay. it does not need to be very accurate. something around this number is fine
Since the users will not use identical cores and wires, it is up to them to select the cores and wires to match 47uH, using an LCR meter. even if you have a standard 100uH torrid core, just open half of the windings to get around 47uH.
@@MyVanitar Thanks! I will buy some iron powder cores, wire and a LCR meter and try it out. :)
Firstly thanks a lot for your project. Excellent work ! . As a matter of fact i was looking for a working circuitry for indicating cc /cv modes by leds, in order to use it on a buck converter based on tl494. BUT in your schematic it is not shown the connection of IC1 ( MCP6002) PIN 5 . PLEASE CLARIFY CONNECTION OF IC1 PIN5 . . Many thanks in advance.
Pin-5 has a label named "CC". It is named a net label in Altium which is connected to another point labeled "CC"
Hello, one question with a 12V fixed input this circuit output is 0-30V? (new in this area)
No, this is a buck converter, which means the output is always lower, what you want is a buck-boost, I will publish this also in the future, so subscribe to get notified
Great educational video Thank you for sharing. Do you know where I can find the BOM list I would like to order the PCB and put this together?
Thanks. I appreciate it if you watch the video completely. I've talked about that
Great and quality content, thanks! I would like to see a project for 220v > 36V 10A Smps.
It's possible, let me see what happens in near future
@@MyVanitar I will be waiting for this! Let me know when will you start this project. I will support this project.
Oh superb
Thank you! Cheers!
But why the title *0-30V*?? I was hoping for a buck converter that goes down to 0V but that's not the case here
The title is like that because 1.2V in 30V is nothing and it is written in a generalist form, however, in the detailed explanation, it is written that the minimum is 1.2V. To start from 0, it just needs a small circuit tweak, however, there are rare scenarios that below 1V is necessary. So I decided not to go for it for this circuit that is intended for power applications, however, I'll do it for the next buck design, no worries.
@@MyVanitar I didn't mean it's bad. Heck I don't remember when I ever needed less than 1.5V on my psu. If need ever arises for anything below that I can always put a hard current limit and let the voltage sag to zero if required.
Perfect job! Amazing
Thank you! Cheers!
بسیار عالی
Thx
My question is how fast can it limit current, because you have large capacity like 1500uF at the output.
Suppose it is set to 30V. I limit the current to 10mA. Then I connect NanoPoint-0201 Series LED. Will it survive?
I would like to see a current graph from your beautifull oscilloscope for that case.
Good question, if you want to have a quick response, yes, you should decrease the output capacitors, because they cause delay, however, if the output noise is important, you have to make a balance between these two. My suggestion for the loads like LED is not to go very high in voltage or reduce the capacitors. That's why LED power supplies don't care that much about ripple and noise, current limit and the peak current are more important.
@@MyVanitar It is not for driving LED's, but to indicate the sensitivity of small devices if one uses this huge power supply as a lab bench. I took this small LED just as an example. The current limit only works after the stored energy (up to 30V) in the capacitors flowed out unregelated... Cannot there be something like an automatic quick discharge of the capacitors if the voltage has to drop for current limiting? Or quickly switch to a small capacitor?
@@geerthospers5977 For your mentioned reason, the laboratory power supplies are linear because the output noise is low and they don't need to use large capacitors at the output, however, they are not efficient, but the best choice for sensitive loads and "laboratory" use. if your load is not sensitive to noise, just reduce the output capacitors, however for a general solution, maybe an inrush current limiter would be more useful. so you would connect your sensitive loads with a limiter. However, even for my own lab power supply, I always care about the voltage. The main benefit of CC in the "general" applications is not to leave the voltage as it is, however, is to keep the current limited, for example in the case of charging a lithium-ion battery. We "set" the voltage at 4.2V, BUT, limit the current to prevent the battery from exploding.
For efficiency and lower ripple one can use a SMPS preregulator and then a Low Drop linear regulator. Better the low drop should track the SMPS to maintain the least voltage needed for regulation. In that case, say a 0,5 volt drop at 7Amps would produce around 4Watts of loss.
Excellent video sir,
I need Omron s8vk-c24024 power supply schematic diagram
Thanks, I don't have such a schematic of that device, sorry
What is LGND in the schematic and how does it apply?
LGND means the load's ground, because the shunt resistor is in series with the output ground, it means the input ground and output ground are NOT identical, if you short them, the current sense part will not work
@@MyVanitar Oh cool thank you so much. So in this case, both GND and LGND connects together and there are actually the same thing right ? Connects via the shunt resistor
As I mentioned, they should NOT be connected to each other. it is pretty clear. This method is called the low side current sensing, where a shunt resistor is placed on the ground line. You can read about this online (low side current sensing)
@@MyVanitar Thank you so much for the giving clear idea on it. Appriciate it :)
@@MyVanitar Just one more thing, this can be used from 0.01 Ohm instead of 0.05 Ohm. Hope I'm correct
What happens if we add another 470uF capacitor to the input?
nothing bad, you will get lower noise at the output, however, it is recommended to add that capacitor near your load because power wires introduce some noise themselves.
i want to design constant AC voltage (12V or 24V) power supply from 220/240 V, please help me
Constant AC voltage? Why not using a transformer. 220V to 12V or 24V transformer. if Your load consumes 1A, then use a 1.5A or 2A transformer. then the voltage will not drop
@@MyVanitar will output remain same when input voltage changes (like 200 to 250v) in transformer?
@@RehanKhan-nc6bf So No, in this case, the output will be reduced. You will need an AC regulator. I will talk about this in the future, however, I can not guarantee the time
@@MyVanitar ok bro
سلام مهندس میشه شماتیک مدار رو لطف کنید؟
check the article link in the TH-cam video description. I expect you to write English and watch the video completely
How to increase ampere range ?
The regulator itself can not deliver not more than 8A continuously
cool
Thanks, Cheers!
Hi, how to order the pcb？thx
when you ask this question, I realize that you haven't watched the video completely. I publish an article (with a more detailed description) with each video that you can access through a link in the video description. Please check the article. There is a place where you can order the PCB.
@@MyVanitar I watched the video completely now, I know how to order it now, thank you.
@@Chanchan1-k7q Good luck
@@MyVanitar the PCBs is delivered, but can’t find ts4264cw50 anywhere, do you have any alternative parts recommend？thanks in advance
@@Chanchan1-k7q Yes, you can use TS2937CW50 (SOT-223, 5V regulator), however, I think you can not insert 30V to its input with some safety margin. I did up to 28V. Datasheet says up to 26V. check the datasheet.
Share the gerberas?
Please watch the video completely