This is my old program that can help calculate many voltage and current regulators.
Allows to calculate:
* LM317 (LM150 , LM350) voltage regulator
* LM317 (LM150 , LM350) current regulator
* L200 voltage and/or current regulator
* TL431 precision shunt regulator
* TL431 precision shunt regulator (with LM317)
* M5237 3-terminal adjustable regulator
* 78xx series voltage regulator
* 78xx series current regulator
* uA723 precision voltage and/or current regulator
Download (109Kb)
Allows to calculate:
* LM317 (LM150 , LM350) voltage regulator
* LM317 (LM150 , LM350) current regulator
* L200 voltage and/or current regulator
* TL431 precision shunt regulator
* TL431 precision shunt regulator (with LM317)
* M5237 3-terminal adjustable regulator
* 78xx series voltage regulator
* 78xx series current regulator
* uA723 precision voltage and/or current regulator
Download (109Kb)
That is an interesting site Nazar_lv.
(However for some reason I can not open the pictures, such as the regulator on page ??????? High-end ????????? ??? ?????????? ????????????. Maybe it is a problem with my computer).
(However for some reason I can not open the pictures, such as the regulator on page ??????? High-end ????????? ??? ?????????? ????????????. Maybe it is a problem with my computer).
It is my blog
or with you browser, this is page about "electronic capacitor", it is global negative feedback free electronic substitutes, that has a stable impedance 0,1...0,2Ohm (equivalent capacity 40000u) in the band to megahertz shunting NP0 0,1 microfarads Murata GRM31 in close to chips. This structure provides in a comparison with the best series audio electrolytic capacitors (Nichicon KZ, FG, Black Gate FK,NX, Elna Cerafine, Silmic II, Silmic) significantly better results. I use it in my DACs Picardian chord v1.0, Picardian chord v1.2 and Overture v3.0
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It is not a regulator (right side of the circuit), it is a follower, for low and stable(it is important) output resistance. it completely detach regulator (317\337) from load, therefore we have the ideal transient response when load "changes", and dont have noise and output resistance modulation.
Yes, it is ideal for max 0.2...0.3A (DACs, phono preams etc)
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I meant whole circuit as regulator (LM317 is regulating).
Right side from LM317 is VT1 acting as follower and VT2 as shunt element.
I fail to see how is LM317 completely detached from load? By R2 resistor?
200, 300 mA....at 5V, without load...only with heatsinks 🙂
Negative circuit and output capacitors deleted for better understanding
Right side from LM317 is VT1 acting as follower and VT2 as shunt element.
I fail to see how is LM317 completely detached from load? By R2 resistor?
200, 300 mA....at 5V, without load...only with heatsinks 🙂
Negative circuit and output capacitors deleted for better understanding
Attachments
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VT1+VT2+R5 forms superbeta transistor (Shiklai)
R2+VT1+VT2
if no load there is no reason to supply this load 😉
output capacitors 0.1-10u SMD NP0/X7R is needed for HF bypass (>1Mhz), caps on 317/337 out (not less than 1u) is needed for 317/337 stability
right word should be impedance
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I like this circuit. Maybe it would be intersting to try it with R2 replaced with constant current diode?
Try it and you forget all audiophiles electrolytic capacitors 😉
No
This formulas helps you calculate this design
R4=240*(Uout-Ueb) / 1.25
R2=(1,25-Ueb) / (0.3/Uout)+Iload
where Uout-output voltage V, Ueb-emitter-base voltage VT1, VT4 V, Iload- load current А.
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Stab Design Program
Thanks for sharing this small handy program, i like it !
Any technical information on lm317 shuntregulator regarding: PSSR, regulation, output resistance versus frequency?
Thanks for sharing this small handy program, i like it !
Any technical information on lm317 shuntregulator regarding: PSSR, regulation, output resistance versus frequency?
Nazar
thx for program and el cap schematic
have you measured or simulated noise and pssr of your LM317 based regulator
can we use higher values for caps at adj and output of LM317 - say 100 - 220 uF
thx for program and el cap schematic
have you measured or simulated noise and pssr of your LM317 based regulator
can we use higher values for caps at adj and output of LM317 - say 100 - 220 uF
Sounds good but transistors are hot
Hi Nazar,
i've built the regulator presented by you used in your DAC-s and it sounds really good but my transistors (especially last one) are running very hot.
I'm using it to power only one opamp wich is a LPF for a DAC.
What should error should i check ?
Thanks a lot,
Adrian
Hi Nazar,
i've built the regulator presented by you used in your DAC-s and it sounds really good but my transistors (especially last one) are running very hot.
I'm using it to power only one opamp wich is a LPF for a DAC.
What should error should i check ?
Thanks a lot,
Adrian
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