Wanted CC CV Regulated POwer Supply Circuit For construction - Page 1
Forum section: electronics / projects

author: Gurumurthy
author_rank: Regular Contributor
timestamp: June 15, 2017, 06:26:01 pm
content: Hi to all!!!!I want to construct CC CV Regulated POwer Supply Circuit For Laboratory Bench use. I am Totally Confused of Circuits available in Google. Every time i construct and Obtain Magic smoke out of it..Please Give Circits with CC CV Regulated POwer Supply Circuit for specification ofinput voltage 34voutput voltage 0-30V @ 5 Ampere.It should work in constant Current mode and constant voltage made.Help me in this regard....

author: MosherIV
author_rank: Super Contributor
timestamp: June 15, 2017, 06:50:57 pm
content: QuoteIf you are planning a linear PSU, you must plan to be able to dissipate 150Watts.That is not easy for a home project.

author: Kleinstein
author_rank: Super Contributor
timestamp: June 15, 2017, 07:22:09 pm
content: At this power level one should seriously think about using at least 2, maybe more taps from the transformer. Otherwise there is a lot of waste heat to get rid of.I would take a look at a few commercial power supplies. This can be the older HP ones, but also the newer cheap Chinese ones (e.g. KA3005). The usually use the same principle with a floating regulator powered from a small extra transformer winding (or an extra transformer if you don't get a special one). In principle the circuit in the cheap ones is usually OK, they just usually specify too much current for the given circuit.I would prefer a design with BJT power transistors - using MOSFETs in parallel is more difficult and at this power level one will need a few in parallel.

author: debininja
author_rank: Contributor
timestamp: June 15, 2017, 10:34:46 pm
content: Here you go. Some components in there have become obsolete or really hard to find, so replace the reference voltage zeners and op-amps with more modern variants, and replace the BJTs with some TIP120s. Might have to put a voltage follower to get enough current output to drive non-high-gain BJTs, though.http://www.ti.com/lit/an/snoa857/snoa857.pdf

author: wasyoungonce
author_rank: Frequent Contributor
timestamp: June 16, 2017, 12:27:11 am
content: Not again....Quote from: BravoV on May 19, 2017, 06:23:29 am

author: Gurumurthy
author_rank: Regular Contributor
timestamp: June 16, 2017, 02:52:15 am
content: HI wasyoungonce,Most of the components are counterfeits, But LM317 or LM723 cost around Rs10 or 15. So there will be no counterfeits for these IC because they cost less. That is the reason to cling on these.My aim is not constructing a cheap Lab power supply but a power supply which could get the command and operate and more over I am Student for electronics. So this is constraint which limits my ability to spend on the project. I accept that this is not Simple Circuit to build.

author: endevor100
author_rank: Contributor
timestamp: June 16, 2017, 04:22:55 am
content: Peter Oakes has a long series on youtube about the design of a 30V 5A power supply. He links to his final schematics on the element14 forum.https://www.youtube.com/playlist?list=PL_atu5RtEPi4aNzoMtZ5_S6ruhFR98T_p

author: Kleinstein
author_rank: Super Contributor
timestamp: June 16, 2017, 07:11:04 am
content: The circuit developed shown by Peter Oakes is not a good example. That circuit has issues, so I would not recommend it.