[time-nuts] Low noise power supplies?

[M. Simon]

Rick,

I'm just finishing up some low noise supplies that use the TPSA49xx regulator. The AC input is a 12 AC wall wart and it uses zener/darlington pre-regulators. +5 and +3.3 V @ 150 ma each. I have the boards in hand and am ordering parts. The voltages are tweakable. i.e. 5.1V and 3.4V for instance. 


If this is of some interest I will be making the boards available once the design is tested. That will allow you to customize the voltages if you need something different. 


I also have a board on the way that includes the above two voltages and +/- 12V @ 150 ma.  The voltages are tweakable so you can get +5.1 V and 3.4V and +/-12.3 - for instance. 


If this is of some interest let me know and I'll push them along.  If you have questions - ask. 


I also have a LM1117 board that is good for 800 ma each @ +5 and +3.3. Not so quiet but more current. That one requires a 12.6V AC CT transformer. Of course you can use a higher input voltage but it will reduce the maximum current. That is tested and for sale now. You can also get different voltages by adjusting components. 


Schematics, parts lists, and ordering instructions: 


http://spacetimepro.blogspot.com/2012/10/power-up.html


Simon 

 



Engineering is the art of making what you want from what you can get at a profit.