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Minimizing AC/DC flyback transformer size

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tinska.h

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Hey everyone,

Is it possible to reduce transformer size while retaining output current capability (voltage is locked)?

If heat dissipation is not a problem, would decreasing primary inductance and increasing switching frequency (e.g. current controlled or voltage controlled) increase the current output capability? I guess the saturation current is the main problem, or is it not?


Btw. I'm operating in QR-mode and in 50-100W range, without PFC (Can't use PFC).

Thank you in advance!
 

Yes, increasing switching frequency is the primary method, though it has limitations due to switching losses in the semiconductors and ferrite. Operating in transition/boundary mode will allow you to get more power through as well.
 

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