Scott, I have designed a few off-line flybacks and one low voltage flyback converter. They are typically not used above 100 watts output. They are especially good for multiple outputs as the outputs tend to have tight inter-regulation. A common output inductor is not needed. They can be built to run from low Japanese AC line to high Australian without any switching. The drawbacks, compared to a balanced forward converter topology include a larger transformer, larger electrolytic caps, higher voltage transistor (but only one is needed), higher voltage rectifiers, and higher conducted noise that must be filtered, to name a few. Like any switcher there is a learning curve to the design knowledge. I tended towards current-mode, discontinuous flyback topology.
Dave Cuthbert Micron Technology From: [email protected] [mailto:[email protected]] Sent: Tuesday, May 06, 2003 1:01 PM To: [email protected] Subject: Fly-back Switched-Mode Power Supplies All, I wanted to try and get a feel for how many Fly-back SMPS are being designed these days. Are they used frequently in today's designs? 1. Are they typically used for multiple voltage rail output? 2. Typically higher, or lower current applications? 3. Do people have the RF Emissions figured out on them? or are people struggling? Any information, personal experiences, etc. would be greatly appreciated. Thank you. Best Regards, Scott Mee Johnson Controls Inc. Automotive Systems Group EMC Product Compliance 616.394.2565 [email protected] This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
