Can something similar be built with a MOSFET for a 100A circuit at 100V output coming out of a SMPS where the output ripple is 200mV and I want a 10mV ripple?
Would be interesting to see the difference between this and the same circuit with the output transistors shorted. Ie. Capacitance multiplier vs. Bulk capacitance only. Would also be good to show the input vs. the output noise.
Put bulk capacitors (as many as you like), apply 4A, and see the output. I have a video in which I put a 4700uF capacitor and the load is just 0.2A. check that video and you will be amazed about the output noise
1- Replacement of rectifier bridge with STPS 30150 C diodes + space for cooling radiators 2- For capacitors C1/C2/C3/C4 - more space should be provided between them (I want to put a 33000uF 100V capacitor - space is needed between them) 3- For T3/T4 transistors - I would put 3 - 3 TIP35C transistors and 3 TIP36C transistors each. 4- Capacitors C5/C6/C7/C8 are OK, but 2.2uF and 220nF should also be installed. 5- Diodes D2/D3 - in my opinion I would put Schottky diodes (12SQ060), but measurements must be made here - it is possible that the diodes are too fast. 6- With the T1/T2 transistors, a small space for the radiator (small individual radiators) - it's just a personal opinion.@@MyVanitar
If you have only one transistor - it will be forced to carry 4A, so if you put 3 transistors the 4 A will be divided by 1.3 A on each transistor. So yes, 3 put in parallel + a little space between them@@MyVanitar
I'm a bit skeptical about it because, in practice, the current division is not equal among 3 transistors. I think we should have 3 separate driving transistors as well. All of your suggestions are good, for Schottky diodes truth be told, I don't know, a Schottky could be better or maybe it doesn't matter for this purpose. The load on T1 and T2 is low, don't even get warm.
Mine is 1 oz, I don't think 2 oz is necessary for this layout and I did not face anything special, by the way, if I realize it's necessary, I may do tinning instead of using 2 oz. if you do not agree, you can go for 2 oz, but it is way more expensive
@@MyVanitar these people are jealous trolls. This circuit was designed professionally. Look at his ID. it seems a police officer gave him a good lesson 😂
It's there, those transistors send current to the load when the voltage dips in the ripple instead of the 470u caps. I came here looking for a way to reduce the 4700u caps on a similar circuit I did a few days ago, but seeing this circuit made me realise that if there is no charge stored on to give to the collector the emitter won't have anything to supply the load. Still need the bulk, but this can maybe help reduce what's required in the filtering. MyVanitor explains it in the article (which I recommend reading) as "preliminary ripple reduction". Thanks @MyVanitar for the article :)
Can something similar be built with a MOSFET for a 100A circuit at 100V output coming out of a SMPS where the output ripple is 200mV and I want a 10mV ripple?
I did not get good results using a Mosfet, probably Mosfet is for switching, not boosting
hi ,, are the input ac voltage fluctuations corrected in this?
our power grids have high fluctuations
This converts AC to a very low noise DC, if you want a fixed voltage, you need to use a regulator after this
Cool design! Keep it goin 🫸🔥
Thanks 🔥
Would be interesting to see the difference between this and the same circuit with the output transistors shorted.
Ie. Capacitance multiplier vs. Bulk capacitance only.
Would also be good to show the input vs. the output noise.
Put bulk capacitors (as many as you like), apply 4A, and see the output. I have a video in which I put a 4700uF capacitor and the load is just 0.2A. check that video and you will be amazed about the output noise
Thanks for sharing
My pleasure
The output is very low noise. Good ❤
Thanks 😅
Good job!
Thank you! Cheers!
Can i use this for my audio amplifier (STK4221 II)?
Yes, why not. this is a very low noise supply
@@MyVanitar thanks, sound quality more better since i use this power supply
@@hemamadni2117 glad to hear that
I want to ask you if you want to make this scheme with some changes?
if you have some suggestions, you are quite welcome to mention them
1- Replacement of rectifier bridge with STPS 30150 C diodes + space for cooling radiators
2- For capacitors C1/C2/C3/C4 - more space should be provided between them (I want to put a 33000uF 100V capacitor - space is needed between them)
3- For T3/T4 transistors - I would put 3 - 3 TIP35C transistors and 3 TIP36C transistors each.
4- Capacitors C5/C6/C7/C8 are OK, but 2.2uF and 220nF should also be installed.
5- Diodes D2/D3 - in my opinion I would put Schottky diodes (12SQ060), but measurements must be made here - it is possible that the diodes are too fast.
6- With the T1/T2 transistors, a small space for the radiator (small individual radiators) - it's just a personal opinion.@@MyVanitar
for number 3, do you mean 3 transistors in parallel?
If you have only one transistor - it will be forced to carry 4A, so if you put 3 transistors the 4 A will be divided by 1.3 A on each transistor. So yes, 3 put in parallel + a little space between them@@MyVanitar
I'm a bit skeptical about it because, in practice, the current division is not equal among 3 transistors. I think we should have 3 separate driving transistors as well. All of your suggestions are good, for Schottky diodes truth be told, I don't know, a Schottky could be better or maybe it doesn't matter for this purpose. The load on T1 and T2 is low, don't even get warm.
Did you have the board fabbed with 1 oz or 2 oz copper?
Best, Steve
Mine is 1 oz, I don't think 2 oz is necessary for this layout and I did not face anything special, by the way, if I realize it's necessary, I may do tinning instead of using 2 oz. if you do not agree, you can go for 2 oz, but it is way more expensive
Sir how to design this power supply
How to calculate the value of each component
Pls make 1 video
mostly by practice and testing because calculations are not always show the desired behavior in practice
What is the purpose of this device?
a low noise power supply
Can i use this for my audio amplifier (STK4221 II)?
Use differential probe with 100x gain
Then you'll be able to measure actual ripple
differential? 100X gain or attenuation? The device is isolated from the mains. The input is a transformer. The ripple measurement is correct
I am from India . So , please can you explain in Hindi ?
unfortunately, I'm not from India and I don't know Hindi
@@MyVanitar So , I would like to suggest that you should learn Hindi.
No capacitance multiplier present. Just bulk capacitance.
You don't use it :-))
@@MyVanitar these people are jealous trolls. This circuit was designed professionally. Look at his ID. it seems a police officer gave him a good lesson 😂
It's there, those transistors send current to the load when the voltage dips in the ripple instead of the 470u caps.
I came here looking for a way to reduce the 4700u caps on a similar circuit I did a few days ago, but seeing this circuit made me realise that if there is no charge stored on to give to the collector the emitter won't have anything to supply the load. Still need the bulk, but this can maybe help reduce what's required in the filtering. MyVanitor explains it in the article (which I recommend reading) as "preliminary ripple reduction".
Thanks @MyVanitar for the article :)