3V Vin-Vout is normally sufficient for this LM three pin fixed reg series. Since their datasheet states 2V minimum at 1A 25C. The reg chip's temperature is a factor. You will measure the whole rail system and make sure in practice anyway. When a reg drops out stops fixing Vout and just follows Vin dropping. You avoid that region. You will also see about max thermal drift of your own UBiB installation to factor in which depends on box ambient temp, the CCS setting, the sinking.
It is possible to use one Led or no Led and depend on the trimmer only. Not the same mixture of active and passive elements traits as in the standard but it should work.
Must bypass them with a wire link and it will be like they aren't there. Or link their pads if not there at all.
I mean, close/connect the LED contacts? Can you draw it on the diagram please?
I do not quite understand...
I do not quite understand...
I finished the UltraBIB for my streamer clocks,tweaked with a Flexy for Use a Mundorf 4 pole capacitor,This time I used a magnificent 100VA O Core transformer from James transformer.
The UltraBIB gives a completely different dimension to my clocks,thanks Salas.
wiring is not over
The first version for my dac clocks
The UltraBIB gives a completely different dimension to my clocks,thanks Salas.
wiring is not over
The first version for my dac clocks
Too bad I missed this one, keep getting back to it due to dimensions (height).
If you ever do another batch or 1.4 that would be welcome!
If you ever do another batch or 1.4 that would be welcome!
To find out R1’s value you need to take the maximum current that your load draws(150mA in your case) to which you need to sum the spare current of the regulator(100mA). The total here is 250mA
You will need to divide 630mV to 250ma which will give you the value of R1 in ohms. In this case it will be 2.52R
R1 = 630mV / ((shunt spare current mA) + (load maximum current mA))
You will need to divide 630mV to 250ma which will give you the value of R1 in ohms. In this case it will be 2.52R
R1 = 630mV / ((shunt spare current mA) + (load maximum current mA))
I have BlackGate capacitors 100uf25V, 47uf25v at 220uf16v
Can I put them instead of C2 in C3?
Which ones are better to put where?
Can I put them instead of C2 in C3?
Which ones are better to put where?
What is the output voltage are you aiming for? What is your application?
For c2 bigger capacitance gives lower output noise and longer startup times. If something digital on the rails maybe you don’t want long startup times..
For c3 you have to select your cap as suggested by Salas(it needs to be in a certain impedance range 0.12-0.22r @ 100khz).
You can play around with c2 but not with c3 unless you have an oscilloscope and know what you are doing.
Unfortunately using black gates doesn’t guarantee you a trouble free ending.
For c2 bigger capacitance gives lower output noise and longer startup times. If something digital on the rails maybe you don’t want long startup times..
For c3 you have to select your cap as suggested by Salas(it needs to be in a certain impedance range 0.12-0.22r @ 100khz).
You can play around with c2 but not with c3 unless you have an oscilloscope and know what you are doing.
Unfortunately using black gates doesn’t guarantee you a trouble free ending.
So for the analog side of your pcm or for its digital side?
I guess for analog. In this case you can use for c2 220uf16v.
Do you have a datasheet for the 47uf and 100uf caps? You can find there what is their actual impedance and would be easier to see which can be used for c3.
I guess for analog. In this case you can use for c2 220uf16v.
Do you have a datasheet for the 47uf and 100uf caps? You can find there what is their actual impedance and would be easier to see which can be used for c3.
You can try the same 220uf but 100uf will be preferred. With 100uf you are sure the reg for digital starts sooner than the one for analog.
Beside this the digital tolerates noise a bit more than the analog so lower capacitance for c2 shouldn’t be a problem.
Edit: if you want the lowest noise possible use 220uf for c2 on the digital reg and 220uf || 100uf(parallel them for 320uf) on the analog reg.
Beside this the digital tolerates noise a bit more than the analog so lower capacitance for c2 shouldn’t be a problem.
Edit: if you want the lowest noise possible use 220uf for c2 on the digital reg and 220uf || 100uf(parallel them for 320uf) on the analog reg.
Rather 0.58V +/- 3% (560mV-600mV) Vbe I have seen from my BC3XX Q1 transistor samples at the current bias level we use them in this circuit (1-2mA). Small practical division result difference when preferring a 580mV median or a max 600mV to pre-calculate R1. But if you do get 630mV from your samples its more precise to use that value of course.
Salas I want to thank you for sharing this great regulator with us.
I made a small smd regulator pcb for my diy dac. The sound is absolutely fantastic. Better in every aspect than my current super regulator (which i maybe didn't tune very well i guess).
For now i feed it with smps wallwart, but I will buy suitable transformer soon.
19VDC smps input (will change to toroidal transformer 12VAC soon)
10,5VDC output
CCS setting-700mA
M1-IRF9610
M2-IRF530
BC859C and BC807-40 transistors
SUSUMU RG 0603 resistors 10-25ppm
2SK209-GR jfet-s for CCS-s (135R degeneration resistors, 1.8mA current)
Lite-On RED leds - will change that to HLMP-6000
C1-2x Nichicon 4700uF, 35V
C2-Nichicon ES 470uF, 35V
C3-SMD PANASONIC FC 100uF, 35V (0.15ohm ESR)
PCB is 4 layer of which 3 layers are GND. I wanted to have top and bottom layer separated by just 0.2mm
Out of 700mA CCS setting i have 500mA constant load (4 mini local shunts) 100-120mA spare current and the rest is used by digital portion
Is the ccs jfet suitable for my build? Is it not degrading the regulator performance?
I made a small smd regulator pcb for my diy dac. The sound is absolutely fantastic. Better in every aspect than my current super regulator (which i maybe didn't tune very well i guess).
For now i feed it with smps wallwart, but I will buy suitable transformer soon.
19VDC smps input (will change to toroidal transformer 12VAC soon)
10,5VDC output
CCS setting-700mA
M1-IRF9610
M2-IRF530
BC859C and BC807-40 transistors
SUSUMU RG 0603 resistors 10-25ppm
2SK209-GR jfet-s for CCS-s (135R degeneration resistors, 1.8mA current)
Lite-On RED leds - will change that to HLMP-6000
C1-2x Nichicon 4700uF, 35V
C2-Nichicon ES 470uF, 35V
C3-SMD PANASONIC FC 100uF, 35V (0.15ohm ESR)
PCB is 4 layer of which 3 layers are GND. I wanted to have top and bottom layer separated by just 0.2mm
Out of 700mA CCS setting i have 500mA constant load (4 mini local shunts) 100-120mA spare current and the rest is used by digital portion
Is the ccs jfet suitable for my build? Is it not degrading the regulator performance?
@juliobozek
"2SK209-GR jfet-s for CCS-s (135R degeneration resistors, 1.8mA current)"
"Is the ccs jfet suitable for my build? Is it not degrading the regulator performance?"
-The 2SK209 is essentially a 2SK117 in SMD form. So its a good low noise Jfet suitable for the purpose.
"The sound is absolutely fantastic. Better in every aspect than my current super regulator"
- I am glad that you like it. Congratulations for your build and enjoy the music.
"2SK209-GR jfet-s for CCS-s (135R degeneration resistors, 1.8mA current)"
"Is the ccs jfet suitable for my build? Is it not degrading the regulator performance?"
-The 2SK209 is essentially a 2SK117 in SMD form. So its a good low noise Jfet suitable for the purpose.
"The sound is absolutely fantastic. Better in every aspect than my current super regulator"
- I am glad that you like it. Congratulations for your build and enjoy the music.