Indlela yokukhetha amacandelo ahambelanayo anenzuzo kuyilo lwebhodi yesiphaluka?

Indlela yokukhetha amacandelo ahambelanayo anenzuzo kuyilo lwebhodi yesiphaluka?

1. Khetha amacandelo aluncedo ekupakisheni


Kwinqanaba elipheleleyo lomzobo weskimu, kufuneka sithathele ingqalelo izigqibo zecandelo lokupakishwa kunye nephethini yephedi ekufuneka yenziwe kwinqanaba loyilo. Nanga amanye amacebiso okuqwalasela xa ukhetha amacandelo asekelwe kwipakethe yecandelo.
Khumbula, iphakheji ibandakanya uqhagamshelo lwephedi yombane kunye nemilinganiselo yomatshini (x, y kunye no-z) yecandelo, oko kukuthi, imilo yecandelo kunye nezikhonkwane ezidibanisa PCB. Xa ukhetha amacandelo, kufuneka uqwalasele naluphi na ufakelo olunokwenzeka okanye izithintelo zokupakisha kumaleko aphezulu nasezantsi ePCB yokugqibela. Amanye amacandelo (afana ne-polar capacitance) anokuba nezithintelo zokukhutshwa kobude, ekufuneka ziqwalaselwe kwinkqubo yokukhetha icandelo. Ekuqaleni koyilo, unokuzoba imilo esisiseko yebhodi yesekethe, kwaye emva koko ubeke izinto ezinkulu okanye indawo ebalulekileyo (ezifana nezihlanganisi) oceba ukuzisebenzisa. Ngale ndlela, unokujonga kwaye ukhawuleze ubone iMbono yeSekethe yebhodi yesekethe (ngaphandle kweengcingo), kwaye unike ngokuchaneka kokuma kwesalamane kunye nokuphakama kwecandelo lebhodi yesekethe kunye namacandelo. Oku kuya kunceda ukuqinisekisa ukuba amacandelo anokubekwa ngokufanelekileyo kwipakethe yangaphandle (imveliso yeplastiki, i-chassis, isakhelo, njl.) Emva kwendibano yePCB. Fowunela imowudi ye-3D yokujonga kwangaphambili kwimenyu yesixhobo ukukhangela yonke ibhodi yesekethe.
Ipateni yephedi ibonisa eyona pad okanye ngokumila kwesixhobo esithengiswayo kwiPCB. Ezi patheni zobhedu kwi-PCB nazo ziqulethe ulwazi oluthile olusisiseko. Ubungakanani bepatheni yepatheni kufuneka buchaneke ukuze kuqinisekiswe i-welding echanekileyo kunye nokunyaniseka komatshini kunye ne-thermal yamacandelo adibeneyo. Xa uyila ubeko PCB, kufuneka sithathele ingqalelo indlela ibhodi yesekethe iya kwenziwa, okanye indlela iphedi iya kuphothelwa ukuba welded ngesandla. I-Reflow soldering (i-flux melting kwisithando somlilo esilawulwayo esiphezulu) inokusingatha uluhlu olubanzi lwezixhobo zokunyuka kwendawo (SMD). I-Wave soldering idla ngokusetyenziselwa ukuthengisa ngasemva kwebhodi yesekethe ukulungisa izixhobo zokungena kumngxuma, kodwa inokuphatha amanye amacandelo axhonywe phezulu abekwe ngasemva kwePCB. Ngokuqhelekileyo, xa usebenzisa le teknoloji, izixhobo ezisezantsi zokunyuka kwendawo kufuneka zilungiswe ngendlela ethile, kwaye ukwenzela ukuba ulungelelanise le ndlela ye-welding, i-pad ingadinga ukuguqulwa.
Ukukhethwa kwamacandelo kunokutshintshwa kuyo yonke inkqubo yoyilo. Ekuqaleni kwenkqubo yoyilo, ukugqiba ukuba zeziphi izixhobo kufuneka zisebenzise i-electroplated ngokusebenzisa imingxuma (PTH) kwaye kufuneka isebenzise iteknoloji yokunyuka kwendawo (SMT) iya kunceda ukucwangciswa kwe-PCB. Izinto ekufuneka ziqwalaselwe ziquka iindleko zesixhobo, ubukho, ukuxinana kwendawo yesixhobo kunye nokusetyenziswa kombane, njl.njl. Ngokwembono yokwenziwa, izixhobo zokuxhoma umphezulu zikholisa ukuba nexabiso eliphantsi kunezixhobo zokuphuma emngxunyeni, kwaye ngokubanzi zinokusebenziseka okuphezulu. Kwiiprojekthi zeprototype ezincinci naphakathi, kungcono ukhethe izixhobo ezinkulu zokukhwela umphezulu okanye izixhobo zomngxunya, ezingalungele kuphela ukuwelda ngesandla, kodwa zikwanceda ekunxibelelaneni okungcono kwepads kunye nemiqondiso kwinkqubo yokufunyanwa kwempazamo kunye nokulungiswa kwempazamo. .
Ukuba akukho phakheji esele yenziwe kwi-database, ngokuqhelekileyo kukwenza ipakethe eyenziwe ngokwezifiso kwisixhobo.

2. Sebenzisa iindlela ezifanelekileyo zokumisa


Qinisekisa ukuba uyilo lunamandla okwaneleyo odlulayo kunye nomgangatho womhlaba. Xa usebenzisa iisekethe ezidibeneyo, qiniseka ukusebenzisa i-decoupling capacitor efanelekileyo kufuphi nokuphela kwamandla emhlabeni (ngokukhethekileyo indiza ephantsi). Umthamo ofanelekileyo we-capacitor uxhomekeke kwisicelo esithile, iteknoloji ye-capacitor kunye nokusebenza rhoqo. Xa i-bypass capacitor ibekwe phakathi kokunikezelwa kwamandla kunye nezikhonkwane zomhlaba kwaye isondele kwi-IC pin echanekileyo, ukuhambelana kwe-electromagnetic kunye nokuchaphazeleka kwesekethe kunokulungiswa.

3. Yabela ukupakishwa kwecandelo lenyani
Shicilela i-bill of materials (BOM) yokujonga amacandelo enyani. Amalungu e-Virtual awanakho ukupakishwa okuhambelanayo kwaye awayi kudluliselwa kwinqanaba loyilo. Yenza ibhili yezixhobo kwaye ujonge onke amacandelo kuyilo. Izinto kuphela kufuneka zibe namandla kunye neempawu zomhlaba, kuba zibhekwa njengezinto ezibonakalayo, ezicutshungulwa ngokukodwa kwindawo yeskimu kwaye aziyi kudluliselwa kwisakhiwo soyilo. Ngaphandle kokuba isetyenziselwa iinjongo zokulinganisa, iikhomponenti eziboniswe kwindawo yenyani kufuneka zitshintshwe ngamacandelo ngokupakisha.

4. Qinisekisa ukuba unebhili epheleleyo yedatha yemathiriyeli
Khangela ukuba ngaba kukho idatha eyaneleyo kunye nepheleleyo kwingxelo yempahla. Emva kokudala i-bill yezinto eziphathekayo, kuyimfuneko ukujonga ngokucophelela kunye nokuncedisa ulwazi olungaphelelanga lwezixhobo, ababoneleli okanye abavelisi kuwo onke amangeniso amacandelo.

5. Hlela ngokweleyibhile yecandelo


Ukuze kube lula ukuhlenga-hlengiswa nokujongwa kwebhili yezixhobo, qinisekisa ukuba iilebhile zecandelo zinenombolo ngokulandelelanayo.

6. Qwalasela isekethe yesango engafunekiyo
Ngokuqhelekileyo, igalelo lawo onke amasango angafunekiyo kufuneka abe noqhagamshelo lomqondiso ukuphepha ukuxhoma ekupheleni kwegalelo. Qinisekisa ukuba ujonga onke amasango angafunekiyo okanye angekhoyo kwaye onke amagalelo angenacingo aqhagamshelwe ngokupheleleyo. Kwezinye iimeko, ukuba igalelo limisiwe, inkqubo yonke ayiyi kusebenza ngokuchanekileyo. Thatha ii-amplifiers ezisebenza kabini, ezihlala zisetyenziselwa ukuyila. Ukuba enye kuphela indlela ezimbini-amacandelo op amp IC isetyenziswa, kucetyiswa ukuba mhlawumbi usebenzise enye op amp, okanye umhlaba igalelo op amp engasetyenziswanga, kwaye ulungiselele iyunithi efanelekileyo inzuzo (okanye enye inzuzo) womnatha wengxelo, ukuze kuqinisekiswe ukusebenza okuqhelekileyo kwecandelo lonke.
Kwezinye iimeko, ii-ICs ezinezikhonkwane ezidadayo zinokungasebenzi kakuhle kuluhlu lwesalathisi. Ngokuqhelekileyo, kuphela xa isixhobo se-IC okanye amanye amasango kwisixhobo esifanayo engasebenzi kwindawo egcweleyo, igalelo okanye imveliso isondele okanye ikwicandelo likaloliwe wamandla, le IC inokuhlangabezana neemfuno zesalathisi xa isebenza. Ukulinganisa ngokuqhelekileyo akunakukwazi ukuyibamba le meko, kuba imifuziselo yokulinganisa ngokubanzi ayidibanisi iindawo ezininzi ze-IC kunye ukwenza imodeli yesiphumo sokunqunyanyiswa koqhagamshelo.

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