Nzira yekuziva sei SMT chikamu che polarity

Nzira yekuziva sei SMT chikamu che polarity

Kunyanya kutarisisa kunofanirwa kubhadharwa kune zvikamu zve polarity mune yese PCBA yekugadzirisa maitiro, nekuti zvisizvo zvinongedzo zvikamu zvinotungamira kune batch tsaona uye kutadza kwese.PCBA board.Naizvozvo, zvakakosha kuti mainjiniya kana vashandi vekugadzira vanzwisise SMT polarity zvikamu.

1. Tsanangudzo ye polarity

Polarity inoreva kuti yakanaka neipini kana yekutanga pini yechikamu, uye yakanaka uye yakaipa kana pini yekutanga yePCB iri munzira imwe chete.Kana iyo nzira yechikamu uye PCB board isingaenderane, inonzi reverse yakaipa.

2. Polarity identification nzira

a.Chip resistor ine nonpolarity

b.Nzira yekuziva sei Capacitor polarity

• Nonpolarity yeceramic capacitor

• Tantalum capacitors ane polarity.Positive marking yePCB uye zvikamu: 1) ruvara rwebhendi rekumaka;2) “+” kumaka;3) diagonal marking

• Iyo electrolysis uye capacitance yealuminium ine polarity.Mucherechedzo wechikamu: bhandi remavara rinomiririra zvakaipa;Mucherechedzo wePCB: bhendi reruvara kana kuti “+” rinomiririra zvakanaka.

3. Nzira yekuziva sei inductor polarity

Ÿ Hapana chinodiwa chepolar pasuru ye chip coil nemimwe magumo maviri ewelding.

Ÿ Multi pin inductors ane polarity zvinodiwa.Mucherechedzo wechikamu: dot / “1″ inomirira polarity point;PCB chiratidzo: dot / denderedzwa / "*" inomiririra polarity point.

4. Nzira yekuziva sei chiedza emitting diode polarity

Ÿ SMT pamusoro yakakwira LED ine polarity.Negative chiratidzo chechikamu: green is negative;mucherechedzo usina kunaka wePCB: 1) bhawa yakatwasuka, 2) bhendi reruvara, 3) kona yakapinza yesirikirini yesiririka, 4) “匚” yesiriki sikirini.

5. Nzira yekuziva sei diode polarity

Ÿ SMT pamusoro pegomo diode ine polarity.Negative label of component: 1) color band, 2) groove, 3) ruvara rwekumaka (girazi);zvakaipa pakumaka kwePCB: 1) bhara rakamira kuenda kumaka, 2) ruvara kuenda kumaka, 3) sirika sikirini yakapinza kona, 4) "匚" kumaka

6. Nzira yekuziva sei IC (Integrated Circuit) polarity

Ÿ SOIC mhando yekurongedza ine polarity.Polarity indication: 1) color band, 2) chiratidzo, 3) concave point, groove, 4) bevel.

Ÿ SOP kana QFP mhando yekurongedza ine polarity.Polarity chiratidzo: 1) concave / groove kumaka, 2) imwe yemapoinzi yakasiyana kubva kune mamwe maviri kana matatu mapoinzi (saizi / chimiro).

Ÿ QFN mhando yekurongedza ine polarity.Polarity kumaka: 1) imwe poindi yakasiyana kubva kune mamwe maviri mapoinzi (saizi / chimiro), 2) beveled mupendero kumaka, 3) chiratidzo kumaka (yakatwasuka bar, "+", dot)

7. Nzira yekuziva sei (BGA)Bhora Grid Array polarity

chikamu polarity: concave point / groove mark / Dot / denderedzwa kumaka;PCB polarity: denderedzwa / Dot / 1 kana A / diagonal kumaka.Iyo polarity point yechikamu inoenderana neiyo polarity point paPCB.

(Mashoko emufananidzo kubva kuruboshwe kuenda kurudyi, uye kubva kumusoro kusvika pasi: doti rezvikamu rinoenderana nePCB screen printing “1″, doti rezvikamu rinoenderana nePCB screen printing “1 naA”, denderedzwa. poindi yezvikamu inoenderana neiyo polarity point yePCB, iyo bevel mupendero wezvikamu unoenderana nePCB polarity point, denderedzwa poindi yezvikamu inoenderana neiyo polarity point yePCB, iyo polarity point inoenderana nemazvo, polarity point inoenderana. kukanganisa, uye nzira yakadzoserwa shure)

PCBFuture inogona kupa yakakwira mhando isina akadhindwa edunhu mabhodhi uyemagungano ebhodhi redunhu akadhindwapamutengo wakaderera zvikuru, sevhisi yakatanhamara uye kuendesa panguva.Chikwata chine makore anopfuura maviri echiitiko chakagadzira mukurumbira wekugara kuendesa zvigadzirwa zvemhando yepamusoro uye masevhisi nenguva.Kana uine chero mibvunzo, tapota taurasales@pcbfuture.compachena.