Dear jami
Hello
At first step , you can use another parts .
At second step , is it important to you , making your aim , with this circuit , or you can change it with better circuits ?
If you want design better type , i can help you .
Best Wishes
Goldsmith
Well , what do you want accurately ? Switching power supply or linear power supply ? and what current and voltage do you need at your out put and describe the specifications that you need on your power supply , thus i can post many power supply circuits that i have designed them , or i can tell you the way of their design .
Good luck
Goldsmith
Basically I need a variable power supply for experimental purposes, means I need it to feed circuits being examined or under development ,
my preferences are as following
1- minimum voltage as possible upto 30-50V
2- minimum current in mA upto 3-5A or more
3- economical and efficent/ ripple free
4- fault or high current protection/ all possible protections
In conclusion I need an efficient variable supply for home Lab/Professional purposes
Also if you can help me in providing with schematic of Solar Charge control, it will be greatfull
Best regars
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One more thing,Supply should have analogue ouput current and voltage meters/ simple digital meters
Hello jami
I have many many circuits about power supplies .( because i love them !!)
Try below circuit :
You can control the output voltage from 0 volt ( approx )( in fact from 20mv) up to 45 volt as well as . and the out put current is about 0 up to 4.99 amperes .
Good luck
Goldsmith
hello jami
I think your simulator has some problem , because i simulated it with PSpice before posting for you .
By the way . i think the problem is here : you forgot to add a 5 volt power supply to the input of op amp . you just used a potentiometer!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Good luck
Goldsmith
first i used supply on inputs of op-amps, but output remains same, and if we use a supply on their inputs then how can we vary the output voltage and current
Daer Jami
The out put voltage formula is : vref (1+R5/R6) . and if you try to change the vref or R5 , thus the out put voltage will change . sp it means that should change the vref (V2) . do you know how ?!
Ok , now see below figures , that i changed the out put voltage in them , please :
Good luck
Goldsmith
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---------- Post added at 22:37 ---------- Previous post was at 22:27 ----------
What are you doing ? I can't understand that why you can not earn success ? if you change the vref from zero up to six volt , you will have the out put voltage from zero up to 50 volt ! .How did you try to change the vref ?????!!!!!!!!!!!!!!!!!!!!!!!!!
Dear dselec
Hi
How are you ?
As you can see at the original question he want make a variable power supply for experiment the circuits . ( up to 50 volt and up to 5 amp ) but your attachments are constant voltage .
Respectfully
Goldsmith