2V dropout for e.g 3A = 6W of thermal disipation! I would look for some buck predregulators and some low dropout linear post regulators instead : )
i have been reading more these couple of last days here and there - the thing is i could probably get away with LT1084 only (properly implemented)- one example is Fidelizer Nikola 2 - that is a preety simple power supply (sometimes there is no need to be to complicated) and according to some listening tests, sounds nice....
Have to think - maybe in reality i really don't need any superreg or complicated mish-mash - maybe it will be enough to just use a regular LT1084 and finish the story
Have to think - maybe in reality i really don't need any superreg or complicated mish-mash - maybe it will be enough to just use a regular LT1084 and finish the story
LT1084 dropout voltage = 1.5V, you said you need 3A, so 1.5x3 = 4.5Wats of thermal disipation. Your audio thing consume 13.5Wats at pik at 12V so your power supply reguirement let say 1.1A. add some small amount of reserve let say 1.5A. 1.5x1.5 = 2.5Wats of thermal disipaition, so its ok but still need some heatsink e.g. you can use case for thermal disipation. Other than LT1084 you will need transformer, diode bridge, biler capacitors, filters and things = cca 50eur minimum. Retail price for Nikola 2 is USD $849 for an you say simple psu. You can buy 16 items those one I linked you on ebay, think about it. I'm unsubscribed, those silver-gold-criosilver-snakeoil and things and in addition it also "sound", sorry I can't stand it, too much for me.
I would go this way, ideal diode controler, buck predregulator and paraleled LT3045 for e.g. 5A power supply, and will cost me cca < 200eur and thermal disipation small and small alu enclosure which will be almost cold, misery noise... in case I need some snake oil power supply.
I would go this way, ideal diode controler, buck predregulator and paraleled LT3045 for e.g. 5A power supply, and will cost me cca < 200eur and thermal disipation small and small alu enclosure which will be almost cold, misery noise... in case I need some snake oil power supply.
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No worries, i did notnwant to buy Nikola 2 psu.
.. i was mentioning it for reference only....
You have a good point there.... will go to gym and after i will check all of it again.....
That diode controler is something i have not played with
.. might be something.... thank you
.. i was mentioning it for reference only....
You have a good point there.... will go to gym and after i will check all of it again.....
That diode controler is something i have not played with
.. might be something.... thank you
I don't know, me too not tried and to be honest my interest for clasic power supply not interest me, found those ic 7 days ago and to be honest I wont to build one ideal diode and try. : ) Opamps and things not interest me anymore, I am working on something diferent, plan for a longer period after I finish some unfinished analogye things, search for DDPD on this forum! About LT3042 (LT3045 I mentioned), and their output capacitor, see this post https://www.diyaudio.com/community/...ow-noise-vref-the-gled431.285346/post-4589769
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I've experimented with it and currently incorporate it into my dual channel hybrid.
6xLT3045 per channel
6xLT3045 per channel
I'm happy with this one discrete version https://www.diyaudio.com/community/threads/super-regulator.247281/post-7537194 , it work very nice and not depend of component shortage, even micro one https://www.diyaudio.com/community/attachments/dsc_2209-jpg.1228630/ https://www.diyaudio.com/community/attachments/dsc_2208-jpg.1228629/ : )
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that would be nice if i dom't need 16V/3A.....
i need to check finances (where i will end up) for that ideal bridge with LT4320, with some prereg (maybe LT1084) and 6xLT3045 at the output...... (some plan to do it)
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LT1084 might be used but do in mind it have not that low dropout voltage, prety high power disipation while 3A, ideal diode have no sense that way. Search for an example of buck type. I found XL4015 nice buck regulator for use as predregulator, even XL4015 have allready nice regulation and it can incorporate booth CC and CV control, see some articles about them https://circuitdigest.com/electronic-circuits/diy-xl4015-dc-dc-buck-converter-module , yes there is similar regulators even beter for example ones which work on 1Mhz switching frequency even smaller and more efecient, higer input voltage...etc, in my opinion XL4015 is nice one : ) Even I have made digital one using xl4015, using them for many things, charging, charging car battery...etc, very durable, nice protections, an multi-purpose buck regulator, even I have added ina226 ic for measuring voltage and current, oled display... etc, and it do not have heatsink : ) Somebody will think its bad because cheap, wrong. Add him an nice filtering and an nice post regulator and you are done. There is even xl4016 of 8A and VinMax=40V capability and 96% eficiency. There are literally hundreds of them, you can even buy them at some kiosks : ) You can design your own nice clean power supply prety cheap including enclosure for around $100, for example one from ebay, their enclosure+torus tranfformer, capacitors, filters, alu enclosure, allready finished, so if you not like pcb put your own pcb inside and use 70% of their parts, its cheaper than making your own enclsure, torus transformer... etc. Some thinking of mine. : )
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An nice buck postfilter https://www.diyaudio.com/community/...all-warts-preamps-hpa-korg-nutube-etc.354213/ which I very like, I have simulated them and it work very nice and eficient in real circuit too, put it before postregulator...
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I have built 4 L-adapter.
Large one is for Nuc8i3 90w.
https://www.diyaudio.com/community/threads/l-adapter.336685/
Large one is for Nuc8i3 90w.
https://www.diyaudio.com/community/threads/l-adapter.336685/
The simplest one should be with LT3042 with an pass transistor
Edit: here you have all in one -> https://www.ebay.com/itm/274837874962 , it have LT1764 fast transient response LDO (low dropout) predregulator with 340mV Vdropout, and it have LT3042 with their NPN pass transistor as postregulator, its probably the best buy and for cheap, 2.5A capable, but it still reguire something to form an low dropout voltage for LT1764 , e.g. you can use XL4015 for that.
For example use somethig lie this one -> https://www.ebay.com/itm/353532995691 (enlosure and trafo only if you not like pcb)
than remove pcb and put this one into enclosure https://www.ebay.de/itm/272472609079 (item 3 or item 4)
than combine it with this one https://www.ebay.com/itm/274837874962
total < $100 and you have nice 12V around 50W power supply for your audio device : )
Edit: here you have all in one -> https://www.ebay.com/itm/274837874962 , it have LT1764 fast transient response LDO (low dropout) predregulator with 340mV Vdropout, and it have LT3042 with their NPN pass transistor as postregulator, its probably the best buy and for cheap, 2.5A capable, but it still reguire something to form an low dropout voltage for LT1764 , e.g. you can use XL4015 for that.
For example use somethig lie this one -> https://www.ebay.com/itm/353532995691 (enlosure and trafo only if you not like pcb)
than remove pcb and put this one into enclosure https://www.ebay.de/itm/272472609079 (item 3 or item 4)
than combine it with this one https://www.ebay.com/itm/274837874962
total < $100 and you have nice 12V around 50W power supply for your audio device : )
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guys - thank you so much for all the input.....
..
thing is - i don't care much about voltage dropout and everything (i am running class A amplifier back at home) - most important thing to me is how that will sound .... 😉🙂😀
.
everything else is only bonus here....
..
thing is - i don't care much about voltage dropout and everything (i am running class A amplifier back at home) - most important thing to me is how that will sound .... 😉🙂😀
.
everything else is only bonus here....