A simple but low noise LT1761/LT1964 PSU design

[gootee]

Attached is a zip file with two LT-Spice circuits and the necessary files for them. One uses LT1964 and LT1962. The other uses LT1964 and LT1761.

 

[maxw]

Thanks for your input Gootee!

I'm now going to build this PSU. I'll order parts and PCBs in the next day or so. Will post results when complete

 

[maxw]

Got the PCBs back from OSHPark

Attached is a couple pics and Eagle files.

 

[maxw]

And built! Works perfectly.

I used R1 of 240R and R2 of 2400R to give +/- 13.4V. It's about 35mm tall with standoffs so will fit in a 1U enclosure nicely.

I have 2 spare PCBs if anyone is interested.

 

[Mark Johnson]

Excellent photos! And a very lovely build, with SMD resistors aligned much better than I usually achieve! Protip: calipers with electronic digital readouts are now very inexpensive

example #1

example #2

example #3

 

[Karsten Sømand]

Very nice job, maxw. A pleasure to see the build quality in the very nice pictures. I have dropped you a PM about the extra PCB´s.

Kind regards

Karsten

 

[maxw]

Excellent photos! And a very lovely build, with SMD resistors aligned much better than I usually achieve! Protip: calipers with electronic digital readouts are now very inexpensive

example #1

example #2

example #3

Thanks Mark! I actually prefer the non-digital calipers, is that strange??

Very nice job, maxw. A pleasure to see the build quality in the very nice pictures.

Thanks Karsten.

 

[mrsavage]

Please look over my Eagle Conversion to 120Volts

Attached is my first trail to convert of your 240-Volt Dual Power Supply Eagle files to 120-Volt Dual Power Supply Eagle files. I know NOTHING about Eagle. This is the first time I have try using Eagle, so please forgive me for ant mistakes. Let me know what you think of my attempt to make the necessary changes.

 

[maxw]

Hi mrsavage,
Yeah it looks OK, it will work. Note that N$2 trace doesn't fully connect to the top middle/bottom pad of the transformer.

But if I was you, I would modify my TPS7A3301 PSU instead of the one in this thread.