1. Isikhala phakathi kwamapheshana
Isikhala phakathi kwezingxenye ze-SMD yinkinga okufanele onjiniyela bayinake ngesikhathi sokuhlela.Uma isikhala sincane kakhulu, kunzima kakhulu ukuphrinta unamathisele we-solder futhi ugweme ukuhlanganisa nokunamathisela.
Izincomo zebanga zimi kanje
Izidingo zebanga ledivayisi phakathi kwamapeshi:
Uhlobo olufanayo lwamadivayisi: ≥0.3mm
Amadivayisi angafani: ≥0.13*h+0.3mm (h umehluko omkhulu wokuphakama wezingxenye ezingomakhelwane)
Ibanga phakathi kwezingxenye ezingapeshekwa mathupha kuphela: ≥1.5mm.
Iziphakamiso ezingenhla ezereferensi kuphela, futhi zingahambisana nenqubo ye-PCB yokucaciswa kwedizayini yezinkampani ezifanele.
2. Ibanga phakathi kwedivayisi yomugqa kanye nesichibi
Kufanele kube nebanga elanele phakathi kwedivayisi yokumelana nomugqa kanye nesichibi, futhi kunconywa ukuthi kube phakathi kuka-1-3mm.Ngenxa yokucubungula okunzima, ukusetshenziswa kwama-plug-in aqondile akuvamile manje.
3. Ukubekwa kwama-IC decoupling capacitor
I-decoupling capacitor kufanele ibekwe eduze kwembobo yamandla ye-IC ngayinye, futhi indawo kufanele ibe seduze ngangokunokwenzeka nembobo yamandla ye-IC.Uma i-chip inezimbobo zamandla amaningi, i-decoupling capacitor kufanele ibekwe embobeni ngayinye.
4. Naka isiqondiso sokubekwa kanye nebanga lezingxenye emaphethelweni ebhodi le-PCB.
Njengoba i-PCB ngokuvamile yenziwe ngejikhshi, amadivayisi aseduze konqenqema adinga ukuhlangabezana nemibandela emibili.
Eyokuqala iwukuba ihambisane nendlela yokusika (ukwenza ukucindezeleka komshini komfaniswano wedivayisi. Isibonelo, uma idivayisi ibekwe ngendlela ohlangothini lwesobunxele lwesithombe esingenhla, izikhombisi-ndlela zamandla ezihlukene zamaphedi amabili we i-patch ingase ibangele ukuba ingxenye kanye ne-welding ihlukaniswe.
Okwesibili ukuthi izingxenye azikwazi ukuhlelwa ngaphakathi kwebanga elithile (ukuvimbela ukulimala ezingxenyeni lapho ibhodi lisikwa)
5. Naka izimo lapho amaphedi aseduze adinga ukuxhunywa khona
Uma amaphedi aseduze edinga ukuxhunywa, qala ngokuqinisekisa ukuthi uxhumano lwenziwa ngaphandle ukuze kuvinjelwe ibhuloho elibangelwa uxhumano, futhi unake ububanzi bocingo lwethusi ngalesi sikhathi.
6. Uma iphedi iwela endaweni evamile, ukuchithwa kokushisa kudinga ukucatshangelwa
Uma i-pad iwela endaweni egandayiwe, kufanele kusetshenziswe indlela efanele ukuxhuma i-pad ne-pavement.Futhi, nquma ukuthi uxhume umugqa ongu-1 noma imigqa emi-4 ngokuya ngokwamanje.
Uma indlela ngakwesobunxele yamukelwa, kunzima kakhulu ukushisela noma ukulungisa nokuhlukanisa izingxenye, ngoba izinga lokushisa lihlakazwa ngokugcwele ngethusi elibekwe, okwenza ukushisela kungenzeki.
7. Uma umthofu umncane kunephedi ye-plug-in, kudingeka i-teardrop
Uma ucingo luncane kunephedi yedivayisi esemgqeni, udinga ukungeza ama-teardrop njengoba kuboniswe ngakwesokudla kwesithombe.
Ukwengeza ama-teardrops kunezinzuzo ezilandelayo:
(1) Gwema ukwehla okungazelelwe kobubanzi bomugqa wesignali futhi ubangele ukuboniswa, okungenza ukuxhumana phakathi kwe-trace kanye nengxenye yephedi kuvame ukushelela futhi kuguquke.
(2) Inkinga yokuthi ukuxhumana phakathi kwephedi kanye ne-trace kuphuka kalula ngenxa yomthelela kuyaxazululwa.
(3) Ukuhlelwa kwezinyembezi kungenza futhi ibhodi lesifunda le-PCB libukeke lilihle kakhulu.