From what I have seen, flybacks are used for step down applications, are step-up applications possible? More specifically, is converting from 4VDC to 48VDC possible using a 1:8 transformer?
I'm designing a converter from scratch (no COTS controllers); and I need to step-up from 4V to 48V. I am trying to leverage the turns ratio of the transformer (currently a 1:8).
In a typical boost converter configuration, current is continually drawn from the input; but that is not the case of flybacks. Flybacks push packets of energy kind of like buck converters; they store the energy in the magnetizing inductance during the switch ON; and push out during the off cycle. The input current is discontinuous.
This discontinuity has me thinking there are limitations of the flyback topology that I am not thinking of.
I am confident in solving the controls compensation, EMI/voltage-spikes, and magnetic challenges.
power would be <10W