On Tue, Dec 16, 2008 at 6:17 PM, Harold Hallikainen wrote: > I'm using an LT3461A in a small flyback converter running at 3MHz. The > high frequency was chosen to stay away from an RF receiver frequency > (lower frequency switchers have harmonics that land on or close to the > frequency I'm trying to receive). Does anyone know of a transformer > similar to the Coiltronics VP2-0216R that operates well at 3MHz? This part > is rated as "above 1MHz," but I don't think they had 3 in mind. It has 6 > windings, each around 10uH. > > Thanks! > > Harold 3MHz is very high. If I were in your position I would ask an apps. engineer at Coilcraft, Arnold Magnetics, and Magnetics Inc. What's the RF frequency you are trying to avoid, and why does a higher frequency help avoid interference? Do you need a flyback because of multiple output voltages? If you can't make this run at 3MHz perhaps you can use a soft switching ZVS or ZCS supply which would produce less RFI. - ML -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist