Salas SSLV1.3 UltraBiB shunt regulator

[manniraj]

That's good. Consistent is good there.

Thanks Salas, I have posted this feedback on the high drawing of the current by Soekris on the specific thread. Hope Soren replies back or someone else who is using the same also responds.

 

[Salas]

It's better you actually measure how much current it asks for. The DMM in series Ampere mode between PSU Out+ and Soekris In+ will tell. So to inform them correctly in that thread.

 

[manniraj]

Sure Salas, let me measure and post for better understanding for them.

thanks

 

[janho12345]

I am upgrading my hole system of power supply for the soekris dam1121.
I already have a UltraBiB for the analog path and just bought an reflector D that was meant for digital part, as these two are separated on the dam1121.
Now I’m interested, from the structional view, is this the right way to go, or should I use the UltraBiB for 5V/300mA digital, and the reflector D for 5V/30mA Analog Domain.
Is the UltraBiB well suited for such a low current draw or wouldn’t the reflector be the better choice.

 

[Salas]

I don't know, the one I listened to had both types (photo in post#14).

 

[Dimdim]

My Soekris that Salas is referring to (photo in post#14) is the dam1021 while janho12345 is talking about the dam1121. The difference is that the 1121 requires +5V for its digital section and another +/-5V for its "analog". So 3 power supplies in total.

 

[vgeorge]

I am upgrading my hole system of power supply for the soekris dam1121.
I already have a UltraBiB for the analog path and just bought an reflector D that was meant for digital part, as these two are separated on the dam1121.
Now I’m interested, from the structional view, is this the right way to go, or should I use the UltraBiB for 5V/300mA digital, and the reflector D for 5V/30mA Analog Domain.
Is the UltraBiB well suited for such a low current draw or wouldn’t the reflector be the better choice.

I think reflektor is better for digital.
At least that' s my plan for a DAM1941 I am currently assembling.

 

[dvb projekt]

Hi Salas,

i finished the build of the positiv reg. unfortunately with an orientation failure of J2, witch i realized after powering up.

Now after soldering a new PF5102 in the correct direction, i couldn´t adjust the output voltage.

Any ideas where i could search?

Best,
Oliver

 

[janho12345]

I don't know, the one I listened to had both types (photo in post#14).

Thanks Salas,
I do understand that you did not test this.
But from a theoretical point of view, what would you suggest, for the 250mA digital side and 30mA analog side of a DAC?
Is the reflector not better suited for low current ?

 

[Salas]

The Ref-D has extended flatness of output impedance up to 100kHz. With the JFET mod it also has very low Zo. I would use it.

 

[Salas]

Hi Salas,

i finished the build of the positiv reg. unfortunately with an orientation failure of J2, witch i realized after powering up.

Now after soldering a new PF5102 in the correct direction, i couldn´t adjust the output voltage.

Any ideas where i could search?

Best,
Oliver

Hi, check Q2, Q3 Vbe. If not about 0.6V replace.

 

[Salas]

Also see what mA the mV voltage drop across R7 indicates via Ohm's law. If not 1-3mA then J2 must be replaced.

 

[janho12345]

The Ref-D has extended flatness of output impedance up to 100kHz. With the JFET mod it also has very low Zo. I would use it.

That’s interesting!
It shouldn’t be an problem to use two reflector Ds and connect them as +/- 5V especially as the current draw will look symmetrically no?

 

[Salas]

They make a symmetric from two positives but it would work by showing a virtual ground midpoint. Don't know the compatibility of that in your application. UBiB has a true ground and a real negative section on the other hand that they can also serve down to +/-5V

 

[pistollero]

I have some work to do.... lol

 

[Salas]

Oops! Here comes the hot modder. Soon the BOM will have an exotic alternative

 

[pistollero]

Oops! Here comes the hot modder. Soon the BOM will have an exotic alternative

Two 5v done with stock BOM ! no mods for now lol.
I don't know what to do with the heatsinks..
I need something vertical.

 

[pistollero]

Filter caps are not from orginal BOM because the stock were not available.

 

[Salas]

Done two already. A pistolero is naturally fast of course

 

[dewdrop]

Finally I have gotten 3 UBiB setup at +/-5V rails for the Soekris DAM 1121. Took a while because I couldn't get the right 16-pin connectors for the 3 board headers.

Will enjoy this for a moment before modding it like TNT. :-D