Calculateur de Largeur de Piste PCB — Formule
## PCB Trace Width (IPC-2221)
### Formula
**Area = (I / (k x dT^0.44))^(1/0.725)**
**Width = Area / Thickness**
For external layers k = 0.048. Copper thickness at 1 oz = 1.378 mils. This is for external (outer) layers; internal layers need wider traces due to less cooling.
### Formula
**Area = (I / (k x dT^0.44))^(1/0.725)**
**Width = Area / Thickness**
For external layers k = 0.048. Copper thickness at 1 oz = 1.378 mils. This is for external (outer) layers; internal layers need wider traces due to less cooling.
Exemple Résolu
3 A current, 10C rise, 1 oz copper.
- Thickness = 1 x 1.378 = 1.378 mils
- Area = (3 / (0.048 x 10^0.44))^(1/0.725) = ~79.6 mils^2
- Width = 79.6 / 1.378 = ~57.8 mils = ~1.47 mm