In all MPS DS the Continuous power dissipation @ 25deg C is mentioned in ABSOLUTE MAXIMUM RATINGS (1) column. So what is the mentioned power dissipation? is it only IC’s or IC with all components like Inductor, Capacitor, Resistors etc…? I have tried to calculate IC & all losses i.e Psw, Pcond, Pic, PL and total loss around 40% of mentioned in DS. Kindly guide correctly if I am doing wrong calculations.
Exp: MP1476, Continuous power dissipation (TA = +25°C) is 2.2W
PFET 309.9319167 mW (PQ1=(Vo/Vin)(Io^2 + ∆I^2/12)(RDSON1) + PQ2=(1-Vo/Vin)(Io^2 + ∆I^2/12)(RDSON2)
PL 72 mW (PL=Io^2 x RDCR)
PIQ 2.28 mW (PIQ=VinxIq)
Psw 30 mW (Psw=VinxIoxFsw(Qgs2+Qgd)/Ig)
Ptotal = 0.411W only.