Conduction loss

First-pass estimator using extracted Rds(on)(Tj) curve.

Inputs

Editable; assumptions called out below

PartRMS drain current Id_rms (A)Junction temperature Tj (°C)Used to scale Rds(on) via the extracted curveDuty cycle D (0..1)

Result

P_cond = D · I_rms² · Rds(on, Tj)

Rds(on)(25 °C)25 mΩ

Rds(on)(100 °C) scale factor× 1.334

Rds(on)(100 °C)33.3 mΩ

Conduction loss6.67 W

Assumes a sinusoidal/RMS approximation and ignores body-diode conduction. The Rds(on)(Tj) factor is interpolated from the extracted normalized curve on the source datasheet.