Those in the link look good, with defined geometry. In the uH range an air coil would not have as many spirals so to develop much parasitic capacitance though. Will be like the Zobel ones in amps outputs.
...It is consisted from DC voltage and AC ripple voltage. Unless there is no CCS like when feeding a reg like those we make here, there should be only the load's bias currents sum flow replenish impact. Put a DVM in DC current mode in there and see what it shows for your particular amp. Play it a bit loud.
...It is consisted from DC voltage and AC ripple voltage. Unless there is no CCS like when feeding a reg like those we make here, there should be only the load's bias currents sum flow replenish impact. Put a DVM in DC current mode in there and see what it shows for your particular amp. Play it a bit loud.
What you want it for, ezDac? There are choices to suit best if you let me know the application.
Actually it is a study I am going to do between various regulators, so I am picking up some different topologies to compare with each other.
They are going to power pre-amplifiers.
So far I decided to go with:
1)Jung-Didden SR, ALWSR version PCB
2) Salas Shunt
3) Sulzer-Borbely regulator
4) Series regulator with RC prefilteing (AM Audio alike)
Claudio,
Ikoflexer is the man who has analysed all of those (and a lot more) the modelled them with LTSpice. If you read through the Salas low voltage shunt thread and Ikoflexer's "my take" thread, especially the former one, you can dig out some information useful to you.
Regards,
Bill
Ikoflexer is the man who has analysed all of those (and a lot more) the modelled them with LTSpice. If you read through the Salas low voltage shunt thread and Ikoflexer's "my take" thread, especially the former one, you can dig out some information useful to you.
Regards,
Bill
You should at least include remote sensing and avoid a Zener Vref. Are those pre amplifiers good with PSRR?
Stealth diodes
Hi Salas and Bill,
about your testing with Fairchild Stealth kind, I would like to ask you if you compared the first (ISL9R460) and II (FFP04S60S) series. I use the older one, and comparing it with the II I found a better S value but higher Cj at lower Vr and higher Qrr.
Hi Salas and Bill,
about your testing with Fairchild Stealth kind, I would like to ask you if you compared the first (ISL9R460) and II (FFP04S60S) series. I use the older one, and comparing it with the II I found a better S value but higher Cj at lower Vr and higher Qrr.
Yes, I will include remote sensing.
About the zener Vref, I intend to use the original schematics.
Regarding preamplifier PSRR, my intention is to use both world.....
I have not compared them. I am using the older ones. They cost less than $3 from Farnell Australia. I first bought 12 to try, liked them and bought another 24. Thanks for your information. I would not think they have huge differences.
Thanks.. Like these:
Digi-Key - 160-1130-ND (Manufacturer - LTL-4233) ?
I think MUR120 will be easier fit to the board. Is there any other difference between MUR105/110/115/120 than the voltage rating? There are mainly ON Semiconductors in the Digikey, and the price seems to be about the same.
The LEDS look OK. The MURs are different for reverse voltage by model yes. Use at least 4 times your rectified DC value for that rating in a full bridge per diode.
the RC time constant is R*C
=10*10^-6 * 100 = 0.001s = 1millisecond.
As a rough estimate, the charge remaining in the capacitor ~1% after 5 RC periods.
I would guess that in 10ms after pulling the plug, the charge in the capacitor is virtually unmeasurable by any of your instruments.
I took the time to read both datasheets a minute ago. You are right.
So the older Steath ISL9R3062 (this is what I have got) has better soft reverse recovery characteristic, while the newer Steath II has faster recovery.
Since we are not using them in switch mode supplies, better soft recovery is preferrable to fast recovery. I am happy that I have got the Steath, not the Steath II.
I believe this to be a good reading when we feel the need to use big caps across mains.... acoustica.org.uk: shocking!
Ricardo
Thanks. So for 12VAC 70V at least, so MUR105 (50V) isn't enough. Would it be better to use PCB transformers or toroid?
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