PCB线宽与电流（PCB line width and current）

ddddaaaaa

PCB 线宽与电流(PCB line width and current)
! o7 ?0 S+ e! [7 aThe withstand current of 1 square copper wire is 5 -- 8A, 380V can
4 y9 K; e3 ~% c- h% jbe brought with maximum 4KW, 220V can be maximum 2KW.
- e3 z, k; r" p/ l' N- e% Y2 square? Three square meters can be pushed like that
PCB line width and current relationship
I. calculation method is as follows:
First, the section area of Track is calculated. The copper foil
" [& ^! m# `, E- J! ~: d8 Pthickness of most PCB is 35um (the PCB manufacturer can be asked if it
is not certain). The width of the PCB is the
cross-sectional area. There is an experience value of current
density for 15 ~ 25 amperes per square millimeter. We can just call it
the area where we get the volume.
I = KT0.44 A0.75 (K is the correction factor, which is 0.024 in the
inner layer of the copper line, and 0.048 in the outer layer)
T to the maximum temperature rise, the unit for degrees Celsius
4 _( K3 O5 O) g, Y2 L* @(copper melting point is 1060 ?)
0 ]0 Z, Y2 @) a9 q( _8 KA to cover the area of copper, the unit is square MIL (not mm mm,
" |/ I  o9 X! d# Vthe attention is square MIL.)
I is the maximum allowable current, the unit is ampere (amp).
. H, M! o& H. i: f% DThe average 10mil = 0.010 inch = 0.254 May be 1A, 250MIL = 6.35mm,
which is 8.3 A  

游客，如果您要查看本帖隐藏内容请回复

* j0 b7 X3 a# b

ExxNEN

PCB线宽与电流

lqf

学习一下，谢谢。
, }; `: D) e. F+ B