GB Thread for Salas SSLV1.1 BiB shunt reg

[LucasAdamson]

What about these Nichicon FWs?

Digi-Key Part Search

 

[Salas]

Looking at parts for my (soon to come) BiB regs. Yum. I love shopping for components.

Has anybody used a 10,000uF cap they recommend in these regs before, that is a good option for 200mA current? (A la DCB1 - hotrod Dale 10R 5W resistor)

I need 9x so I need to keep the costs down, but I still want something good...

I had used 10mF BHC slit foil, that was a good one. But not a budget one. Nichicon and Panasonic are very good IMO.

 

[LucasAdamson]

The price difference between a cap like a cheap plain Panasonic that measures 0.055 Ohm ESR and a fancy 0.03 Ohm "Low ESR" or "Audio" cap that is the same rating and capacity is about 500% - 2000%. Does this cost difference reflect reality in any meaningful way?

I just don't get it. Ignorant I guess....we have resistance going on left right and centre in a circuit. Why such fuss over a fraction of an ohm?

 

[Salas]

No IMHO. Choose more working voltage on the cheaper one instead. Gives life and lower ESR.

 

[Tea-Bag]

I used
Digi-Key - P6939-ND (Manufacturer - ECO-S1HP103CA)
Also should fit

P6690-ND
30mm is max.

 

[LucasAdamson]

No IMHO. Choose more working voltage on the cheaper one instead. Gives life and lower ESR.

There seems to be an optimum for low ESR of around 63v. On many ranges this one is lower ESR than either 50v or 100v.

Anyway, many are under 0.1 of an Ohm ESR regardless of voltage rating, which is perhaps so low that finding the lowest is inconsequential.

 

[LucasAdamson]

Salas, is Hot-rod now defined as 500mA 3R3 or did I misunderstand? On the DCB1 Hot-rod was considered 10R 200mA, no?

I realise that both are possible, and the term is subjective, but just wanted to clarify what we are advised to consider for good performance without over-kill.

 

[Salas]

For DCB1 we had 200mA as first stage HR, then circa 500mA as 2nd stage, there were some builds like that indeed.

 

[LucasAdamson]

So if I go with MUR820/840/860, 10R 5W current (200mA), sinks on mosfets/bjts, 9,400uF cap (actually 2x 4700uF) I should be OK, right?

 

[Salas]

I can't say if you don't mention the load consumption. The CCS-Load creates the HR condition or not.

 

[LucasAdamson]

Of course. Sorry. 25-40mA load.

 

[Salas]

Then its alright.

 

[LucasAdamson]

I'm making a DAC PS, and there are many +5v requirements. I haven't quite figured out how many I will seperate out the supplies beyond a simple analogue 5v feed and a digital 5v feed, but if there were 3 loads from the same chip pulling on one 200mA reg, each pulling about 25mA nominal to 38mA max, how would that work? Is 75mA to max 114mA too much for a 200mA reg?

 

[Salas]

You could go 250mA CCS for the 114mA load for instance. When you will have boards and you will start applying there will already be a 1.1 building thread for such discussions most possibly.

 

[LucasAdamson]

Thanks boss. Have you really been fielding these kind of amateur questions since 2002 on here? I thank you for your patience.

 

[Salas]

Mainly in the later part of the decade. So much so my gaze went out of focus.

 

[Tea-Bag]

Is that you chief?

 

[Salas]

Surely.

 

[sonidos]

Spittin' image of the young Archimedes!

Can't wait to get the boards. I started building the early version with LM317/LM337 psu on a proto board. Never finished. Here's my chance!!

 

[Salas]

Nah, no resemblance, he had a beard and a large bathtub.