SLYY193C january 2023 – april 2023 LMQ61460-Q1 , TPS54319 , TPS62088 , TPS82671 , UCC12040 , UCC12050
In any hard-switched DC/DC converter, charging and discharging parasitic capacitances in the system requires some amount of energy. For a given switch technology and voltage rating, Equation 2 and Equation 3 estimate these losses as:
where
As you can see from Equation 2 and Equation 3, you can reduce these losses primarily by reducing the switching frequency (not desirable), improving the MOSFET charge-related FoMs (QG and CDS) or trading off conduction losses with switching losses.