Why flyback topology
Posted by: powerfly
on
I am new to SMPS design.
Whenever I see a universal AC input power supply, it is flyback. Well, not all of them, but many.
Cell phone chargers for example. The input is 85-265VAC and output is 5V. you are stepping down the voltage. Shouldn't buck regulator be the obvious choice?
Comments
Any other advantage. I think transformer can also me used in Buck regulator.
Should the flyback transformer be custom designed or can any commercial transformer be used.
Should the transformer be custom designed for a flyback converter?
Flyback is one of the simplest and least costly of the various switching topologies available. Since isolation is required, a transformer instead of an inductor is normally used. A transformer can give the necessary step down in voltage by with the correct secondary to primary turns ratio.