2.Minimize the effects of the reverse recovery of any P-N rectifiers.
3.Remove any spikes created by the parasitic elements.
4.Recover as much of this “loss” energy as possible and return it to the
power flow of the power supply.
The designer cannot accomplish all of the goals completely, but improving
the conditions can add another +3 to +9 percent in overall power supply
efficiency.
One additional consideration when working on these circuits is to make all
efforts to band-limit the waveforms in order to reduce any radiated EMI. The
transitions of a switching power supply create the majority of the EMI energy
radiated into the surrounding environment. ...
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