0-50V 0-5A adjustable linear power supply

[fjpompeo]

0-50v

Hi all!

Need a 0-50V, 0-5A adjustable linear power supply. This PSU will be used to power an UPS to be fixed in place of the battery bank.

Regards,

Fernando

 

[jackrs]

mc1466

Hi fernando


Try this at h++p://www.a-and-t-labs.com/K2_Lab_Power_Supply/index.htm

All documentation is provided at left side menu in the page.

Pay attention: i think that exist a bug in electronics now article. See the schematic of power supply (hand draw schematic), its corrected version.

If a switched mode is ok : h++p://www.elecfree.com/electronic/circuit-power-supply-regulator-switching-0-50v-5a-by-tl494-mj15004/


Best Regards

Jackrs

 

[chemelec]

adjustable power supply circuit

Here is a Linear Power Supply that will do what you want.

**broken link removed**

From Gary at Chemelec

Hi all!

Need a 0-50V, 0-5A adjustable linear power supply. This PSU will be used to power an UPS to be fixed in place of the battery bank.

Regards,

Fernando

 

[momename]

regulator 0-50v

circuit power supply regulator switching 0-50V 5A by TL494 , MJ15004

**broken link removed**

**broken link removed**

Added after 6 minutes:

Regulator 0-50V 2A by IC LM723 + Transistor 2N3055 & BD140 & A671

**broken link removed**

Q- 2N3055 x 2 for 5A current

 

[fjpompeo]

adjustable power supply schematic

Thanks to all of you.

I have ellected the one with TL494 but momename how do I adjust current limiting? Read the article but there wasn't nothing about it!

Fernando

 

[neazoi]

hello,
I also need a 50V PSU to drive a class-A linear amplifier (1-2A fine)

Why this circuit **broken link removed**
is so complex related to this https://www.electronics-lab.com/projects/power/029/
or even this https://1stproject-circuit.blogspot.com/2009/11/50v-3a-stabilized-power-supply.html

I mean what does it offer more to worth spending so much?

Thank you

 

[karesz]

Hi,
For the better quality of regulations (stability) vs load & line (& Temperature) changes...
K.

 

[neazoi]

I find really easy to make this one
https://1stproject-circuit.blogspot.com/2009/11/50v-3a-stabilized-power-supply.html
would you think it will be fine for a class-A linear amplifier.

 

[karesz]

I think,
yes, but you see; its no more as a transistor & zener diode as hes Ie stabilizer...
K.

 

[neazoi]

Yes but for an rf power amplifier an output voltage change in the class of milivolts, even 0.5v may not be a trouble.

Leaving alone the small ripple depended on temperature or load changes (in class-A amplifiers load is constant), do you think the simple zener-transistor psu above is clean in terms of noise or not?

 

[karesz]

Dr Om,
I think: yes, as wrote too, but Nois clening?
Surely not better as your AC-input, also I would see over all for apply good bypassings_ Elkos + parallel Ceramics...
Maybe Zener voltage need a ceramics too?
Good luck!
73 de Karesz