44 Volt Power Supply

[Fablab]

Hello, someone has the schematic for a 44 Volt power supply?

 

[ruffrecords]

I am sure there is one somewhere but it may not meet your needs. How much current draw do you expect? Any load regulation or noise/ripple requirements? What is it to be used for?

Cheers

Ian

 

[Fablab]

Hello Ian, I need it for some Trident A Range preamplifier

 

[sahib]

http://www.silentarts.de/DIY/GDIY51X/GDIY51PSU_rev02-Schematic.pdf

Top/left circuit on the above link is for 48V. You can trim the output. It uses TL783 which gives you upto 750mA. If you need more current use LM317HV. Below is the data sheet.

http://www.ti.com/lit/ds/symlink/lm117hv.pdf

 

[Kingston]

Also replace the resistor + 1k trim with just 5k trim. One part less to worry about.

 

[Fablab]

Thank you!
Do you think I can double the mA putting two TL783 in parallel?

 

[Kingston]

Thank you!
Do you think I can double the mA putting two TL783 in parallel?

That's gambling. There's no way to know how the two will interact so it's not a good idea. How many Trident A Range preamplifiers will you be powering?

I doubt one channel eats even 100mA, but please verify this. You'll power many channels with a single TL783.

[edit]

Also easy to power channel groups with separate TL783 power supplies using just one transformer.

 

[Fablab]

I have to power 4 modules ... but the idea of powering the modules with separate TL783 is brilliant, thank you!

 

[sahib]

You can actually parallel them and there is an example in the LM317 data sheet.

However, at the end of the day if more regulators are going to be used Kingtson's recommendation is a much healthier option.

 

[Fablab]

Thank you Sahib!