Montagens Electrónicas em PCB

Cálculo da largura de pistas

Total conductor thickness (including plated copper) and widths for various temperature rises above amb

915 g / m2 ⇒ 105 µm 610 g / m2 ⇒ 70 µm 305 g / m2 ⇒ 35 µm 150 g / m2 ⇒ 18 µm

ient.

- Na web podem encontrar-se programas que nos facilitam este trabalho em: http://www.desmith.net/NMdS/Electronics/TraceWidth.html You need JavaScript enabled to run this calculator

PCB Trace Width Calculator

This page calculates approximations to the ANSI/IPC-D-275 design standards for PCB trace width.

The approximations and rationale are described in Temperature Rise in PCB Traces, equations 13 & 15. by Douglas Brooks, UltraCAD Design, Inc. The original JavaScript implementation of this algorithm was by Brad Suppanz.

The trace width formulas are: I = 0.0150 x dT 0.5453 x A0.7349 for internal traces I = 0.0647 x dT0.4281 x A0.6732 for external traces where: I = maximum current in Amps dT = temperature rise above ambient in °C A = cross-sectional area in mils²

The values calculated here compare very closely with those derived by the UltraCAD PCBTEMP utility.

Change a value in an input field, then press TAB to move to the next field. The results tables will be updated automatically.

Input Data

Field Value Units

Current Amps

Temperature Rise 10 °C

Cu thickness 2 oz/ft² Mils:

Ambient Temperature 25 °C

Conductor Length 1 Inches

Results Data

Internal Traces Value UnitsRequired Trace Width Mils

Cross-section Area Mils²

Resistance Ohms

Voltage Drop Volts

Loss Watts

External Traces Value Units Required Trace Width Mils

Cross-section Area Mils²

Resistance Ohms

Voltage Drop Volts

Loss Watts

ou em: http://www.ultracad.com/calc.html

→ PCBTemp.exe

(*) Sec.

Afastamento entre pistas (*)

7 -133 - Fink, Donald G. , Electronics Engineers’ Handbook - 1st edition

07Jan2004 António M. J. Batista