Isakhiwo sedivayisi ye-PCB akuyona into engafanele, sinemithetho ethile edinga ukulandelwa yiwo wonke umuntu.Ngaphezu kwezidingo ezijwayelekile, ezinye izisetshenziswa ezikhethekile nazo zinezidingo ezihlukile zesakhiwo.
Izidingo zesakhiwo zamadivayisi okukhwabanisa
1) Akufanele kube khona izingxenye ezingaphezulu kuka-3mm 3mm endaweni egobile/yesilisa, egobile/esifazane, futhi akumele kube nezinto zokushisela ezingaba ngu-1.5mm;Ibanga ukusuka kolunye uhlangothi lwedivayisi yokucwilisa ukuya endaweni yembobo yephinikhodi yedivayisi yokucwilisa ngu-2.5 Akumele kube nezingxenye ngaphakathi kobubanzi buka-mm.
2) Akumele kube khona izingxenye ezingaphakathi kwe-1mm ezizungeze idivayisi eqondile/yesilisa, eqondile/yesifazane;lapho ingemuva lensimbi eqondile/yesilisa, eqondile/yesifazane idinga ukufakwa nomgodla, azikho izingxenye okufanele zibekwe ngaphakathi kwe-1mm ukusuka onqenqemeni lomgodla Lapho umgodla ungafakiwe, azikho izingxenye okufanele zibekwe ngaphakathi kwe-2.5mm. kusuka emgodini wokugoba.
3) Isokhethi yepulaki ephilayo yesixhumi esiphansi esisetshenziswa nesixhumi sesitayela saseYurophu, indawo engaphambili yenaliti ende iyindwangu enqatshelwe engu-6.5mm, kanti inaliti emfushane iyindwangu engavunyelwe engu-2.0mm.
4) Iphinikhodi ende yephinikhodi eyodwa kagesi engu-2mmFB ihambisana nendwangu enqatshelwe engu-8mm ngaphambili kwesokhethi yebhodi elilodwa.
Izidingo zesakhiwo zamadivayisi ashisayo
1) Phakathi nesakhiwo sedivayisi, gcina izisetshenziswa ezizwelayo ezishisayo (njengama-electrolytic capacitor, crystal oscillator, njll.) ziqhelelene namadivayisi okushisa okuphezulu ngangokunokwenzeka.
2) Idivayisi eshisayo kufanele ibe seduze nengxenye ngaphansi kokuhlolwa futhi ibe kude nendawo yokushisa ephezulu, ukuze ingathinteki ezinye izingxenye zamandla okushisa alinganayo futhi ibangele ukungasebenzi.
3) Beka izingxenye eziphehla ukushisa nezimelana nokushisa eduze nendawo yokukhipha umoya noma ngaphezulu, kodwa uma zingakwazi ukumelana namazinga okushisa aphakeme, kufanele futhi zibekwe eduze nendawo yokungena komoya, futhi unake ukukhuphuka emoyeni nokunye ukufudumeza. amadivaysi namadivayisi azwela ukushisa ngangokunokwenzeka Gxilisa indawo lapho uya ngakhona.
Izidingo zesakhiwo esinamadivayisi we-polar
I-1) Amadivayisi e-THD ane-polarity noma isiqondiso anesiqondiso esifanayo esakhiweni futhi ahlelwe ngobunono.
2) Isiqondiso se-SMC ehlukanisiwe ebhodini kufanele sihambisane ngangokunokwenzeka;imishini yohlobo olufanayo ihlelwe kahle futhi kahle.
(Izingxenye ezine-polarity zifaka: ama-electrolytic capacitor, tantalum capacitor, diode, njll.)
Izidingo zesakhiwo zamadivayisi wokusoda we- through-hole reflow
I-1) Kuma-PCB anezinhlangothi ezingadluliseli ezinobukhulu obukhulu kuno-300mm, izingxenye ezisindayo akufanele zibekwe phakathi kwe-PCB ngangokunokwenzeka ukuze kuncishiswe ithonya lesisindo sedivayisi ye-plug-in ekuguqulweni kwe-PCB ngesikhathi. inqubo ye-soldering, kanye nomthelela wenqubo ye-plug-in ebhodini.Umthelela wedivayisi ebekiwe.
I-2) Ukuze kube lula ukufakwa, idivayisi inconywa ukuthi ihlelwe eduze nohlangothi lokusebenza lokufaka.
3) Isiqondiso sobude samadivayisi amade (njengamasokhethi enkumbulo, njll.) siyanconywa ukuthi sihambisane nesiqondiso sokudlulisela.
4) Ibanga eliphakathi konqenqema lwephedi yedivayisi yokugeleza egeleza ngembobo kanye ne-QFP, SOP, isixhumi nawo wonke ama-BGA anephimbo ≤ 0.65mm likhulu kuno-20mm.Ibanga elisuka kwamanye amadivaysi e-SMT ngu> 2mm.
5) Ibanga eliphakathi komzimba wensiza yokudambisa yokugeleza kabusha kwe- through-hole ingaphezu kuka-10mm.
6) Ibanga eliphakathi konqenqema lwephedi yedivayisi yokunamathisela ye- through-hole reflow kanye nohlangothi lokudlulisela ngu-≥10mm;ibanga ukusuka ohlangothini olungathumeli ngu-≥5mm.