Output voltage regulation help me

[Aplicant]

Hi to all
If smps power supply output voltage is 50v, shall we decrease any voltage (for instance 25 or 15v) with feedback control.
If So , what happens in circuit
Will power supply work fine or not ?
Thanks in advance

 

[Harald Kapp]

What exactly do you want to achieve?
Set up the 50 V power supply for a lower output voltage? Or add a second regulator after the 50 V output to get a second, lower output voltage?

If So , what happens in circuit?
Will power supply work fine or not ?

Depends very much on the circuit. There are many different power supply designs, not just one.

 

[Aplicant]

Thanks . But I say :
Only one output 50v 3a
Input voltage 140-150v
Efficiency 80%
Transformer wingding
Np:40t
Ns:19t
No auxiliary windings
Pwm:tl494
Operation half bridge
If output is 50v,can i make adjustable voltage from 3v from 50v with FEEDBACK control

Work I made
I put potentiometer to pin 1 of tl494 for adjustable output from 4v till 50v
But this feedback is right way or not?
Transformer Ns is for 50 v
But decreasing duty cycle via feedback control, regulating output voltage is right way?
From 19 turns of sencondary to lower voltage is right way decreasing duty cycle via feedback control?
I don't need other circuits
Thansk in advance

 

[Harald Kapp]

We will neeed a complete schematic to help you. The information we have so far is insufficient, sorry.