Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

1KW or 5KW smps using flyback topology

Status
Not open for further replies.

emiljose88

Junior Member level 3
Joined
Feb 14, 2012
Messages
29
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,281
Location
kerala,india
Activity points
1,444
I wish to design 1KW or 5KW smps Using Flyback topology. Can You suggest the IC and the circuit.
 

In theory you can design a flyback with any output power capability, but in practice , cost and efficiency are some of the constrains to limit the implementation of high power flybacks .
There is not a well defined barrier that marks when to use a fyback or a forward or any other topology, but if your design is more than 250 watts, you may consider use other topology instead of a flyback.


http://www.enotes.com/topic/Switched-mode_power_supply
http://www.smps.us/topologies.html
**broken link removed**
http://www.st.com/internet/com/TECH...AL_LITERATURE/APPLICATION_NOTE/CD00003910.pdf
 

Before you consider any implementation, in design life, you must state your requirements in a spec. Otherwise it is academic.

One of the best SMPS designers whom I have had the pleasure to work with is Keith Billings when he was at Hammond , I was qualifying his custom designs for Burroughs/Unisys.

Here is one of his lectures. https://docs.google.com/viewer?a=v&...T6-dSi&sig=AHIEtbRIPiQFJL2rvw_8snWpInKSNYRN-g which I found for you on flyback design.
But if you want to make a Tesla generator or a 1kW CPU PSU, you still need specs.
 
Last edited:
  • Like
Reactions: mtwieg

    mtwieg

    Points: 2
    Helpful Answer Positive Rating
Forward topology at 1KW? (Not to mention the 5KW... :roll: ) At this level of power I consider it’s better using half-bridge / full-bridge instead.
 
Last edited:

If you are serious about building a 1KW SMPS maybe need to start with a smaller one. The SMPS are hard to design and build, read as much as you can (many of the application notes by the component suppliers are more useful than stuff on the general web). At the >1Kw level you start getting into expensive semiconductors and one blow up is enough to ruin such a project.
 

Attachments

  • SMPS_SH.pdf
    206.4 KB · Views: 197

thanks
Is it possible for 250W (UC3842) 12V 10A or 15A? In forward topology?
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top