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Salas low shunt Group-design by Salas

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#403
Not sure these values are best...

merlin el mago said:
B.O.M.

+1.5V to +5V (If need +5V better 5-35V with 2 mosfets)

Diodes
D1-D4 MUR140 or 1N5822 for 1A out x 4

Resitors & trimmers
R1 current adjust.
R2-R3 220R
R4-R5 2K2
R6 27R
R7 10R
VR1 500R

Caps
C1-C4 0.1Uf/63V or not needed
C5 2200-4700uF/16V
C6 47uF/16V
C7 1000uF/12V
C8 47uF/6.3V Pana FC 0.3-0.35 Ohm 100Khz impedance for 130deg loop stability margin

Mosfet, transistor & JFets
Q1 IRF9520 or IRF9540
Q2 BC560
Q3, Q5 2SK170
Q4 BC550
Q6 D45H8

Heatsinks
Q1 & Q6

======================

+5 to +35V

Diodes
D1-D4 MUR140 or 1N5822 for 1A out x 4

Resitors & trimmers
R1 current adjust.
R2, R5 220R
R3 100R
R4 47R
VR1 500R

Caps
C1-C4 0.1Uf/63V or not needed
C5 2200-4700uF/16V-63V
C6 220u/16-63V
C7 47uF/63V Pana FC 0.3-0.35 Ohm 100Khz impedance for 130deg loop stability margin

Mosfet, transistor & JFets
Q1 IRF9520 or IRF9540
Q2, Q3 & Q5 2SK170
Q4 BC550
Q6 IRF9540

Heatsinks
Q1 & Q6

Leds
L1-L4 green generic

====================

-5V to -35V

Diodes
D1-D4 MUR140 or 1N5822 for 1A out x 4

Resitors & trimmers
R1 current adjust.
R2, R5 220R
R3 100R
R4 47R
VR1 500R

Caps
C1-C4 0.1Uf/63V or not needed
C5 2200-4700uF/16V-63V
C6 220u/16-63V
C7 47uF/63V Pana FC 0.3-0.35 Ohm 100Khz impedance for 130deg loop stability margin

Mosfet, transistor & JFets
Q1 IRF520 or IRF540
Q2, Q3 & Q5 2SK170
Q4 BC560
Q6 IRF540

Heatsinks
Q1 & Q6

Leds
L1-L4 green generic


==========

I'm waiting will be usefull

Enjoy

Felipe
Click to expand...

For VR1? Salas recommended I go with 500R for 5 volts out, but 5K for 15 volts out for VR1.
 
#404
Trimmer values

merlin el mago said:
B.O.M.

+1.5V to +5V (If need +5V better 5-35V with 2 mosfets)

Diodes
D1-D4 MUR140 or 1N5822 for 1A out x 4

Resitors & trimmers
R1 current adjust.
R2-R3 220R
R4-R5 2K2
R6 27R
R7 10R
VR1 500R

Caps
C1-C4 0.1Uf/63V or not needed
C5 2200-4700uF/16V
C6 47uF/16V
C7 1000uF/12V
C8 47uF/6.3V Pana FC 0.3-0.35 Ohm 100Khz impedance for 130deg loop stability margin

Mosfet, transistor & JFets
Q1 IRF9520 or IRF9540
Q2 BC560
Q3, Q5 2SK170
Q4 BC550
Q6 D45H8

Heatsinks
Q1 & Q6

======================

+5 to +35V

Diodes
D1-D4 MUR140 or 1N5822 for 1A out x 4

Resitors & trimmers
R1 current adjust.
R2, R5 220R
R3 100R
R4 47R
VR1 500R

Caps
C1-C4 0.1Uf/63V or not needed
C5 2200-4700uF/16V-63V
C6 220u/16-63V
C7 47uF/63V Pana FC 0.3-0.35 Ohm 100Khz impedance for 130deg loop stability margin

Mosfet, transistor & JFets
Q1 IRF9520 or IRF9540
Q2, Q3 & Q5 2SK170
Q4 BC550
Q6 IRF9540

Heatsinks
Q1 & Q6

Leds
L1-L4 green generic

====================

-5V to -35V

Diodes
D1-D4 MUR140 or 1N5822 for 1A out x 4

Resitors & trimmers
R1 current adjust.
R2, R5 220R
R3 100R
R4 47R
VR1 500R

Caps
C1-C4 0.1Uf/63V or not needed
C5 2200-4700uF/16V-63V
C6 220u/16-63V
C7 47uF/63V Pana FC 0.3-0.35 Ohm 100Khz impedance for 130deg loop stability margin

Mosfet, transistor & JFets
Q1 IRF520 or IRF540
Q2, Q3 & Q5 2SK170
Q4 BC560
Q6 IRF540

Heatsinks
Q1 & Q6

Leds
L1-L4 green generic


==========

I'm waiting will be usefull

Enjoy

Felipe
Click to expand...

N.B. +1.5 to +5Vout VR trimmer 500R, +-5 to +-35Vout trimmer 5K
 
#406
Ryssen said:
I got my boards today!!
But I think you should claim you money at paypal.

List of who have gotten there boards.
1.sureshm
2. wendell c
3. barrows
4.Ryssen
5. qusp
Click to expand...

thought I made it pretty clear I had received mine too. I do not think paypal needs to come into it, and I think you will find that they will say that since they were shipped that you should contact your postal service

or are you talking about the apparent incorrect parts?
 
Last edited:
#409
Ryssen said:
I got my boards today!!
But I think you should claim you money at paypal.

Sorry my friend has sent you this is the 3rd time, and only the 3rd one you get the PCB, I do not know why? I just received the money from one account, there may be errors from paypal. Thank you very much!

I want you to get the PCB, it is important to me!

Thanks all friend!

Quanghao
Click to expand...
 
#414
luvdunhill said:
received. not the prettiest board I've ever seen, but it should work.

If anyone wants to get rid of a <5V section, I'd take it off your hands!
Click to expand...

hehehe, I had the same thoughts down to the letter including the want for another <5v reg. (would like another neg reg too).

waiting for someone to do a really nice 2oz print of the Salas 1.2R reg, nothing against quanghao at all, but the fab house used sure do take the term 'budget' board seriously. I appreciate the effort and am sure it'll work well, but I guess the boards i'm used to of late have spoiled me.

once stuffed with nice parts and full of glowy things its gonna still look good.
 
Last edited:
#418
qusp said:
hehehe, I had the same thoughts down to the letter including the want for another <5v reg. (would like another neg reg too).

waiting for someone to do a really nice 2oz print of the Salas 1.2R reg, nothing against quanghao at all, but the fab house used sure do take the term 'budget' board seriously. I appreciate the effort and am sure it'll work well, but I guess the boards i'm used to of late have spoiled me.

once stuffed with nice parts and full of glowy things its gonna still look good.
Click to expand...
Well, fab house treated QH like gold trader in the sense that they pushed up the gold-plated board pricing while the world gold price dancing. QH was lucky enough not punching his pocket in this order. Thanks QH for your serious negociation.
 
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