Uchongwa njani umahluko phakathi kwecandelo le-SMT

Uchongwa njani umahluko phakathi kwecandelo le-SMT

Ingqwalasela ekhethekileyo kufuneka ihlawulwe kumacandelo e-polarity kuyo yonke inkqubo yokucubungula i-PCBA, kuba amacandelo e-orientation engalunganga aya kukhokelela kwiingozi zebhetshi kunye nokungaphumeleli kwayo yonke into.ibhodi PCBA.Ke ngoko, kubaluleke kakhulu ukuba ubunjineli okanye abasebenzi bemveliso baqonde amacandelo e-SMT polarity.

1. Inkcazo yepolarity

I-Polarity ibhekisa kwinto elungileyo nengalunganga okanye iphini lokuqala lecandelo, kunye ne-positive kunye ne-negative okanye i-pin yokuqala ye-PCB ikwicala elinye.Ukuba ulwalathiso lwecandelo kunye nebhodi yePCB ayihambelani, ibizwa ngokuba yi-reverse embi.

2. Indlela yokuchonga i-polarity

a.I-Chip resistor ine-nonpolarity

b.Indlela yokuchonga iCapacitor polarity

• I-nonpolarity ye-ceramic capacitor

• I-Tantalum capacitors ine-polarity.Ukumakishwa okulungileyo kwe-PCB kunye namacandelo: 1) ukumakishwa kwebhanti yombala;2) “+” ukumakisha;3) ukumakisha kwediagonal

• I-electrolysis kunye ne-capacitance ye-aluminium ine-polarity.Uphawu lwecandelo: ibhendi yombala imele embi;PCB uphawu: umbala band okanye "+" imele positive.

3. Indlela yokuchonga i-inductor polarity

Ÿ Akukho mfuneko yokuba kubekho ipolarity kwipakethe yekhoyili yetshiphu nezinye iziphelo ezimbini zokuwelda.

Ÿ Ii-inductors ezininzi zeephini zineemfuno zepolarity.Inqaku lecandelo: ichaphaza / “1″ imele indawo ebanzi;PCB uphawu: ichaphaza / isangqa / “*” imele polarity point.

4. Indlela yokuchonga i-polarity ye-diode ekhupha ukukhanya

Ÿ Umphezulu we-SMT ofakwe kwi-LED unobumbano.Uphawu olubi lwecandelo: uhlaza lubi;uphawu olubi lwe-PCB: 1) ibha ethe nkqo, 2) ibhanti yombala, 3) ikona ebukhali yesikrini sesilika, 4) “匚” yesikrini sesilika.

5. Indlela yokuchonga i-diode polarity

Ÿ I-SMT yendawo yokubeka imowudi ine-polarity.Ilebula engalunganga yecandelo: 1) ibhendi yombala, 2) i-groove, 3) umbala wokumakisha (iglasi);ingalunganga ekuphawulweni kwePCB: 1) ibha ethe nkqo ukuphawula, 2) umbala ukuphawula, 3) ikona yesilika ebukhali, 4) “匚” ukuphawula

6. Indlela yokuchonga i-IC (Integrated Circuit) polarity

Ÿ Iipakethe zodidi lwe-SOIC zine-polarity.Isalathiso se-Polarity: 1) ibhendi yombala, 2) isimboli, 3) indawo ye-concave, i-groove, 4) i-bevel.

Ÿ I-SOP okanye uhlobo lwe-QFP ukupakishwa kunobumbano.Isalathiso se-polarity: 1) i-concave / groove ukuya kumakisha, i-2) enye yamanqaku ahluke kwamanye amanqaku amabini okanye amathathu (ubungakanani / imilo).

Ÿ Iipakethe zodidi lwe-QFN zine-polarity.I-Polarity yokumakisha: 1) inqaku elinye lahlukile kwamanye amanqaku amabini (ubukhulu / imilo), 2) i-beveled edge ukuya kumakisha, 3) isimboli sokumakisha (ibha ethe tye, “+” , ichaphaza)

7. Uchongwa njani (i-BGA) i-Ball Grid Array polarity

icandelo polarity: indawo concave / uphawu groove / Dot / isangqa ukuphawula;PCB polarity: isangqa / Dot / 1 okanye A / diagonal ukuphawula.Inqaku le-polarity yecandelo lihambelana nendawo ye-polarity kwi-PCB.

(Umbhalo womfanekiso usuka ekhohlo ukuya ekunene, kwaye ukusuka phezulu ukuya ezantsi: ichaphaza lamacandelo lihambelana noshicilelo lwesikrini sePCB “1″, ichaphaza lamacandelo lihambelana noshicilelo lwesikrini sePCB “1 no-A”, isangqa. inqaku lamacandelo lihambelana nendawo ye-polarity ye-PCB, i-bevel edge yamacandelo ihambelana ne-PCB polarity point, inqaku lesangqa samacandelo lihambelana nendawo ye-polarity ye-PCB, amanqaku e-polarity ahambelana ngokuchanekileyo, i-polarity point ehambelanayo. impazamo, kwaye isalathiso sibuyisiwe)

I-PCBFuture inokubonelela ngeebhodi zesekethe ezikumgangatho ophezulu eziprintiweyo kunyeiindibano zebhodi yesiphaluka eprintiweyongexabiso eliphantsi kakhulu, inkonzo ebalaseleyo kunye nokuhanjiswa ngexesha.Iqela elineminyaka engaphezu kwe-2 yamava liye laphuhlisa igama ngokuhlala lihambisa iimveliso ezisemgangathweni kunye neenkonzo ngexesha.Ukuba unayo nayiphi na imibuzo, nceda uqhagamshelanesales@pcbfuture.comngokukhululekileyo.