Sida loo aqoonsado polarity qeeybta SMT

Sida loo aqoonsado polarity qeeybta SMT

Fiiro gaar ah waa in la siiyaa qaybaha polarity ee dhammaan geeddi-socodka PCBA-da, sababtoo ah qaybaha hanuuninta khaldan waxay u horseedi doontaa shilalka dufcadaha iyo fashilka oo dhanguddiga PCBA.Sidaa darteed, aad bay muhiim u tahay in injineernimada ama shaqaalaha wax soo saarku ay fahmaan qaybaha polarity SMT.

1. Qeexida polarity

Polarity waxa loola jeedaa in ta togan iyo taban ama biinanka ugu horreeya ee ka kooban yahay, iyo kan togan iyo taban ama biinka ugu horreeya ee PCB ay ku jiraan jihada isku mid ah.Haddii jihada qaybta iyo guddiga PCB-gu aanay is-waafaqin, waxa loo yaqaannaa bedesho xun.

2. Habka aqoonsiga polarity

a.Chip resistor waxa uu leeyahay nonpolarity

b.Sida loo aqoonsado polarity Capacitor

• Aan polarity ee capacitor dhoobada

• Tantalum capacitors waxay leeyihiin polarity.Calaamadaynta togan ee PCB iyo qaybaha: 1) calaamadaynta midabka midabka;2) calaamadaynta "+";3) calaamadaynta dhinaca

• Electrolysis iyo capacitance ee aluminium waxay leeyihiin polarity.Calaamadda qaybta: midabka midabka ayaa ka dhigan taban;PCB calamada: midabka midabka ama "+" waxay u taagan tahay togan.

3. Sida loo aqoonsado inductor polarity

Ÿ Ma jiraan wax shuruud ah oo loo baahan yahay xirmo gariiradda gariiradda ah iyo labada daraf ee kale ee alxanka.

Ÿ Inductors-ka faraha badan ayaa leh shuruudaha polarity.Calaamadda qaybta: dhibic / "1" waxay u taagan tahay barta polarity;PCB sumadda: dhibic/goobaab/"*" waxay u taagan tahay barta polarity.

4. Sida loo aqoonsado polarity diode iftiin bixisa

Ÿ SMT dusha sare ee dusha sare ee LED-ku wuxuu leeyahay polarity.Calaamadda taban ee qaybta: cagaarka waa taban;calaamad xun ee PCB: 1) bar toosan, 2) band midabka, 3) gees fiiqan oo shaashad xariir ah, 4) "匚" ee shaashadda xariirta.

5. Sida loo aqoonsado polarity diode

Ÿ SMT dusha sare ee diode wuxuu leeyahay polarity.Calaamadda taban ee ka kooban: 1) band midabka, 2) jeexdin, 3) midabka calaamadaynta (glaas);taban si loo calaamadiyo PCB: 1) bar toosan si loo calaamadiyo, 2) midab si loo calaamadiyo, 3) shaashadda xariirta oo gees fiiqan, 4) "匚" si loo calaamadiyo

6. Sida loo aqoonsado IC (Integrated Circuit) polarity

Ÿ Baakadaha nooca SOIC ayaa leh daahsoon.Tilmaanta cirifka: 1) band midab, 2) calaamad, 3) bar go'an, jeexdin, 4) gariir.

Ÿ SOP ama nooca QFP baakadda waxay leedahay daraf.Tilmaanta cirifka: 1) goyn/jeexdin si loo calaamadiyo, 2) mid ka mid ah dhibcaha ayaa ka duwan labada ama saddexda dhibcood ee kale (xajmiga / qaabka).

Ÿ Baakadaha nooca QFN waxay leeyihiin daraf.Polarity si loo calaamadiyo: 1) hal dhibic ayaa ka duwan labada dhibcood ee kale (xajmiga / qaabka), 2) gees go'an si loo calaamadiyo, 3) calaamad si loo calaamadiyo (bar horizontal, "+" , dhibic)

7. Sida loo aqoonsado (BGA) Ball Grid Array polarity

polarity qayb ka mid ah: barta koodhka ah / sumadda jeexdin / dhibic / goobada si loo calaamadiyo;PCB polarity: goobada / Dhibic /1 ama A / gees si loo calaamadiyo.Barta polarity ee qaybtu waxay u dhigantaa barta polarity ee PCB-ga.

(Qoraalka sawirku waa bidix ilaa midig, kor ilaa hoosna: dhibicda qaybaha waxay u dhigantaa daabacaadda shaashadda PCB "1", dhibicda qaybaha waxay u dhigantaa daabacaadda shaashadda PCB "1 iyo A", goobada Barta qaybaha waxay u dhigantaa barta polarity ee PCB-ga, cidhifyada qaybaha waxay u dhigantaa barta polarity PCB, barta goobada qaybaha waxay u dhigantaa barta polarity ee PCB, dhibcaha cirifka ayaa si sax ah u dhigma, dhibcaha dhibcaha qalad, jihadana waa loo rogaa)

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