Mhangura ndiyo yakajairika conductive simbi layer pamusoro pedunhu redunhu (PCB).Usati wafungidzira kuramba kwemhangura paPCB, ndapota cherechedza kuti kuramba kwemhangura kunosiyana nekupisa.Kufungidzira kupokana kwemhangura paPCB, inotevera fomula inogona kushandiswa.
Paunenge uchiverenga iyo general conductor kuramba kukosha R, inotevera fomula inogona kushandiswa.
ʅ : kondakita kureba [mm]
W: kondakita hupamhi [mm]
t: mukobvu kondakita [μm]
ρ : conductivity ye conductor [μ ω cm]
The resistivity of copper iri pa25°C, ρ (@25°C) = ~1.72μ ω cm
Mukuwedzera, kana iwe uchiziva kushorwa kwemhangura pane imwe nzvimbo, Rp, pakupisa kwakasiyana (sezvinoratidzwa mumufananidzo uri pasi apa), unogona kushandisa chirevo chinotevera kuti ufungidzire kupikisa kwemhangura yose, R. Cherechedza kuti zviyero zvemhangura yose. mhangura inoratidzwa pazasi ndiwo ukobvu (t) 35μm, hupamhi (w) 1mm, kureba (ʅ) 1mm.
Rp: kupikisa pane imwe nzvimbo yeyuniti
ʅ : kureba kwemhangura [mm]
W: kufara kwemhangura [mm]
t: ukobvu hwemhangura [μm]
Kana zviyero zvemhangura zviri 3mm muhupamhi, 35μm muukobvu uye 50mm pakureba, kukosha kwekupikisa R kwemhangura pa25 ° C ndiko.
Saka, kana 3A ikozvino inoyerera mhangura paPCB pamusoro pa25 ° C, iyo voltage inodonha inenge 24.5mV.Nekudaro, kana tembiricha yakwira kusvika ku100 ℃, kukosha kwekupikisa kunowedzera ne29% uye kudonha kwevoltage kunova 31.6mV.
Nguva yekutumira: Nov-12-2021