The Modular Bench Power Supply ++, Putting it all together, the bare bones

RE: The Modular Bench Power Supply ++, Putting it all together, the bare bones

alex_bplan — Thu, 12 Oct 2023 19:44:44 GMT

Hello,

I followed closely all your video materials about the modular bench power system
(My question below might be of interest to your audience here)

Can you suggest a principal circuit diagram for tracking control of symmetrical slave negative channel, using the same n-channel MOSFET?
How would the negative part of the circuit would look like?
I guess -- using again a differential amplifier for voltage control and curent limiter?
Is it possible the negative part/channel to be controlled by the same potenciometers already present in the positive part/channel?

RE: The Modular Bench Power Supply ++, Putting it all together, the bare bones

hacklord — Thu, 27 Jul 2017 14:59:09 GMT

Hi i Built this up but it dose not seem toe work the only out put i get is 0.5 volts whet ever the pots are set to?

i used an IRFP064N (just to check is the pin out G D S)

also i used a FPR 4-T221 (it has 4 pins dose it matter which ones i used i connected first 2 to ground 3rd to op amp and 4 to output)

i followed the diagram correctly i think.

i would be very grate full for any help on this as its my first time building a bench power supply.

RE: The Modular Bench Power Supply ++, Putting it all together, the bare bones

Former Member — Sat, 05 Sep 2015 22:53:33 GMT

I built this on a bread board seems very good need to add a meter to it

what is the number of the Vishay four wire sense resistor that you used I cant find it I used a 1% .100ohm 5 watt sense resistor ,seems ok

Garry

RE: The Modular Bench Power Supply ++, Putting it all together, the bare bones

heffa — Tue, 09 Dec 2014 11:05:58 GMT

Peter, will you be publishing a BOM for the project for us that are lazy and don't feel like digging around in the store too much to find the correct part numbers to follow you on a breadboard? :-)

RE: The Modular Bench Power Supply ++, Putting it all together, the bare bones

jw0752 — Thu, 04 Dec 2014 06:32:43 GMT

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