Imibono yoyilo
Kwinkqubo yoyilo lwePCB, uqwalaselo lokuqala bubukhulu bePCB.Emva koko, kufuneka sicinge ngezixhobo kunye neendawo ezineemfuno zokubeka izakhiwo, njengokuba kukho umda wokuphakama, umda wobubanzi kunye nokubetha, iindawo ezifakwe.Emva koko ngokuhambelana nomqondiso wesiphaluka kunye nokuhamba kwamandla, ukucwangciswa kwangaphambili kwemodyuli yesiphaluka nganye, kwaye ekugqibeleni ngokwemigaqo yoyilo yemodyuli yesekethe nganye ukuphumeza ukucwangciswa kwawo onke amacandelo asebenzayo.
Imigaqo esisiseko yoyilo
1. Ukunxibelelana nabasebenzi abafanelekileyo ukuhlangabezana neemfuno ezizodwa kwisakhiwo, i-SI, i-DFM, i-DFT, i-EMC.
2. Ngokomzobo wesakhiwo, izihlanganisi zendawo, imingxuma yokukhwela, izikhombisi kunye nezinye izixhobo ezifuna ukubekwa, kwaye zinike ezi zixhobo iimpawu ezingenakushukunyiswa kunye nobukhulu.
3. Ngokomzobo wento yesakhiwo kunye neemfuno ezikhethekileyo zezixhobo ezithile, setha indawo yocingo engavumelekanga kunye nommandla onqatshelwe.
4. Ukuqwalaselwa ngokubanzi kwentsebenzo ye-PCB kunye nokusebenza kakuhle kokulungiswa kokukhetha ukuhamba kwenkqubo yokucubungula (iphambili kwi-SMT yecala elinye; i-SMT enecala elinye + iplagi-in.
I-SMT enamacala amabini;I-SMT enamacala amabini + iplagi-in), kwaye ngokutsho kobeko lweempawu zenkqubo yokucubungula ezahlukeneyo.
5. Uyilo ngokubhekisele kwiziphumo zoyilo lwangaphambili, ngokutsho "kokuqala okukhulu, emva koko kuncinci, okokuqala kunzima, kube lula" umgaqo woyilo.
6. i-layout kufuneka izame ukuhlangabezana nezi mfuno zilandelayo: umgca opheleleyo mfutshane kangangoko kunokwenzeka, imigca yesignali emfutshane engundoqo;amandla ombane aphezulu, imiqondiso yangoku ephezulu kunye nombane ophantsi, umqondiso omncinci wangoku obuthathaka uhluke ngokupheleleyo;umqondiso we-analog kunye nomqondiso wedijithali ngokwahlukileyo;isignali yefrikhwensi ephezulu kunye nomqondiso ophantsi ophantsi ngokwahlukileyo;Amacandelo aphezulu esithuba sokwanela.Kwisiseko sokuhlangabezana neemfuno zokulinganisa kunye nohlalutyo lwexesha, ukulungiswa kwendawo.
7. Amacandelo esekethe afanayo kangangoko kunokwenzeka usebenzisa i-symmetrical modular layout.
8. useto loyilo olucetyiswayo kwigridi ye-50 mil, uyilo lwesixhobo se-IC, igridi ecetyiswayo kwi-25 25 25 25 25 mil.Uxinaniso lobeko luphezulu, izixhobo ezincinci zokuxhoma umphezulu, iisetingi zegridi ezicetyiswayo zingabi ngaphantsi kwe-5 mil.
Umgaqo woyilo lwamacandelo akhethekileyo
1. kangangoko kunokwenzeka ukunciphisa ubude boqhagamshelwano phakathi kwamacandelo e-FM.Ukuchaphazeleka kwizinto zokuphazamiseka akunakusondela kakhulu omnye komnye, zama ukunciphisa iiparamitha zabo zokuhambisa kunye nokuphazamiseka kwe-electromagnetic.
2. ubukho obunokwenzeka umahluko omkhulu phakathi kwesixhobo kunye nocingo, kufuneka ukwandise umgama phakathi kwabo ukukhusela isiphaluka esifutshane ngengozi.Izixhobo ezinombane onamandla, zama ukulungisa kwiindawo ezingenakufikeleleka lula kubantu.
3. Ubunzima ngaphezu kwe-15g components, kufuneka zongezwe i-bracket fixed, kunye ne-welding.Kwizinto ezinkulu kunye ezinzima, ezivelisa ubushushu akufanele zifakwe kwi-PCB, ezifakwe kuyo yonke indlu kufuneka ziqwalasele umba wokutshatyalaliswa kobushushu, izixhobo ezinobushushu kufuneka zibe kude nezixhobo zokuvelisa ukushisa.
4. kwii-potentiometers, iikhoyili ze-inductor eziguquguqukayo, i-capacitors eguquguqukayo, i-micro switches kunye nezinye izinto ezilungelelanisiweyo zokucwangcisa kufuneka ziqwalasele iimfuno zesakhiwo somatshini, njengemida yokuphakama, ubungakanani bomngxuma, ukulungelelanisa iziko, njl.
5. Beka ngaphambili imingxuma yokubeka i-PCB kunye nesibiyeli esisisigxina esihlala kwindawo.
I-post-layout check
Kuyilo PCB, ubeko olufanelekileyo linyathelo lokuqala kwimpumelelo yoyilo PCB, iinjineli kufuneka ngqongqo khangela oku kulandelayo emva ubeko lugqityiwe.
1. Ubungakanani beempawu zePCB, uyilo lwesixhobo luyahambelana nemizobo yesakhiwo, nokuba iyahlangabezana neemfuno zenkqubo yokwenziwa kwePCB, ezinje ngedayamitha yomngxuma omncinane, ububanzi bomgca obuncinane.
2. ingaba iikhomponenti ziyaphazamisana kwindawo ene-dimensional-dimensional and three-dimensional space, kwaye ingaba ziya kuphazamisana kunye nesakhiwo sezindlu.
3. ingaba amacandelo abekwe onke.
4. isidingo sokuplaga rhoqo okanye ukutshintshwa kwamacandelo kulula ukuplaga kunye nokubuyisela.
5. Ngaba kukho umgama ofanelekileyo phakathi kwesixhobo se-thermal kunye nezixhobo ezivelisa ubushushu.
6. Ngaba kulungele ukulungisa isixhobo esilungelelanisiweyo kwaye ucinezele iqhosha.
7. Ingaba indawo yofakelo lwe-heat sink ngumoya opholileyo.
8. Ingaba ukuhamba kwesignali kuhamba kakuhle kunye noqhagamshelwano olufutshane.
9. Ingaba ingxaki yokuphazamiseka komgca ithathelwe ingqalelo.
10. Ngaba iplagi, i-socket iphikisana noyilo lomatshini.
Ixesha lokuposa: Dec-23-2022