An Efficiency Primer for Switch-Mode, DC-DC Converter Power
Where I P and I V are the peak and valley points on the current waveform, as shown in Figure 3. MOSFET current ramps from I V to I P.For example, if I V is 0.25A, I P is 1.75A, R DS(ON) is 0.1Ω, and V OUT is V IN /2 (for D = 0.5), a calculation that considers only average current (1A) would be:. P COND(MOSFET) (using average current) = 1 2 × 0.1 …