Power-Density Goals Can be Helped by Soft-Switching Options (Download)
Soft switching (also known as resonant switching) is a technique used in power electronics to reduce switching losses and electromagnetic stress on components — and it plays a major role in enabling higher circuit density.
In conventional hard switching, power devices like MOSFETs or IGBTs turn on or off while both voltage and current are present across them. This creates high switching losses (since power = voltage × current during transition) and strong electromagnetic interference (EMI).