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  • Author Author: Robert Peter Oakes
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The Modular Bench Power Supply ++, Putting it all together, the bare bones

Robert Peter Oakes

I will be putting together the video this week end to go with this schematic but I thought i would share this with you in the mean time

VCC can be as much as 40V (I was powering the test circuit on a breadboard with a bench PSU for now set to 30V, my psu max)

image

In the video I will be reviewing the behaviour of this circuit as well as Identifying a few pitfalls (Nothing serious and probably acceptable for a basic PSU but we do want to evaluate where we can improve on things

If you think you know the potential issues, please post and we will compare notes at the weekend image (There are two primary ones)

 

Here is the video that describes and goes through some basic tests of this circuit

Enjoy, again, a little detailed so its is about an hour long

 

I will be adding notes etc in the next few days

  • Hi Peter, I have studied your schematic. If I am interpreting it correctly you have a voltage regulated power supply with an adjustable max 10 A current limiter. I did not realize before that Op Amps could sink current as well as supply it but the orientation of the D1 leads me to believe that IC2B will limit the voltage of the HEX FET if the current climbs higher than your limit set by R2. The one short coming that I can see is that you have control rails tied to the power rails without regulation. You mentioned earlier that you might work the control power at a lower voltage. If there are other things I do not see them and will be anxious to learn.

    John