Otu esi amata polarity akụrụngwa SMT

Otu esi amata polarity akụrụngwa SMT

Ekwesịrị itinye nlebara anya pụrụ iche na akụrụngwa polarity na usoro nhazi PCBA dum, n'ihi na akụrụngwa nghazi na-ezighi ezi ga-eduga n'ihe ọghọm ogbe na ọdịda nke dum.PCBA osisi.Yabụ, ọ dị ezigbo mkpa na ndị injinia ma ọ bụ ndị nrụpụta ka ha ghọta ihe mejupụtara polarity SMT.

1. Nkọwa nke polarity

Polarity na-ezo aka na ihe dị mma na nke na-adịghị mma ma ọ bụ ntụtụ mbụ nke akụrụngwa, na nke ọma na nke ọjọọ ma ọ bụ pin mbụ nke PCB nọ n'otu ụzọ ahụ.Ọ bụrụ na ntụzịaka nke akụrụngwa na bọọdụ PCB adabaghị, a na-akpọ ya reverse bad.

2. Usoro njirimara polarity

a.Chip resistor nwere nonpolarity

b.Otu esi amata polarity Capacitor

• Adịghị polarity nke seramiiki capacitor

• Tantalum capacitors nwere polarity.Akara ziri ezi nke PCB na akụrụngwa: 1) akara agba agba;2) akara "+";3) akara diagonal

• The electrolysis na capacitance nke aluminum nwere polarity.Ihe mejupụtara akara: agba agba na-anọchi anya adịghị mma;PCB akara: agba agba ma ọ bụ “+” na-anọchi anya ihe dị mma.

3. Otu esi amata polarity inductor

Ÿ Enweghị polarity chọrọ maka ngwugwu mgbawa mgbawa na njedebe abụọ ndị ọzọ.

Ÿ Multi pin inductors nwere ihe chọrọ polarity.Akara akụkụ: ntụpọ / “1″ na-anọchi anya ebe polarity;PCB akara: ntụpọ / okirikiri / "*" na-anọchi anya polarity point.

4. Olee otú ịmata ìhè emitting diode polarity

Ÿ SMT elu mounted LED nwere polarity.Akara ọjọọ nke akụrụngwa: akwụkwọ ndụ akwụkwọ ndụ adịghị mma;akara ọjọọ nke PCB: 1) mmanya kwụ ọtọ, 2) agba agba, 3) akụkụ dị nkọ nke ihuenyo silk, 4) “匚” nke ihuenyo silk.

5. Otu esi amata polarity diode

Ÿ SMT elu ugwu diode nwere polarity.Ihe odide na-adịghị mma nke akụrụngwa: 1) agba agba, 2) uzo, 3) agba iji akara (glass);adịghị mma maka akara PCB: 1) mmanya kwụ ọtọ ka akara, 2) agba ka akara, 3) nkuku silk dị nkọ, 4) “匚” ka itinye akara.

6. Otu esi amata IC (Integrated Circuit) polarity

Ÿ Ụdị nkwakọ ngwaahịa SOIC nwere polarity.Ngosipụta polarity: 1) agba agba, 2) akara, 3) ebe concave, groove, 4) bevel.

Ÿ SOP ma ọ bụ ụdị nkwakọ ngwaahịa QFP nwere polarity.Ihe ngosi polarity: 1) concave / groove to marking, 2) otu n'ime isi ihe dị iche na isi abụọ ma ọ bụ atọ ndị ọzọ (nha / ọdịdị).

Ÿ QFN ụdị nkwakọ ngwaahịa nwere polarity.Polarity to marking: 1) otu isi ihe dị iche na isi ihe abụọ ndị ọzọ (nha / ọdịdị), 2) ọnụ ọnụ ka akara akara, 3) akara maka akara (ogwe kwụ ọtọ, “+” , ntụpọ)

7. Otu esi amata (BGA)Ball Grid Array polarity

akụrụngwa polarity: concave point / groove mark / Dot / Circle to mark;PCB polarity: okirikiri / ntụpọ /1 ma ọ bụ A / diagonal ka akara.Ebe polarity nke akụrụngwa dabara na ebe polarity na PCB.

(Ihe odide nke foto a sitere n'aka ekpe gaa n'aka nri, sitekwa n'elu ruo na ala: ntụpọ nke ihe ndị ahụ kwekọrọ na PCB ihuenyo ebipụta "1", ntụpọ nke ihe ndị ahụ kwekọrọ na PCB ihuenyo obibi "1 na A", gburugburu. Isi ihe mejupụtara ya kwekọrọ na isi ihe PCB, ọnụ ọnụ nke ihe ndị ahụ kwekọrọ na PCB polarity point, ebe okirikiri nke ihe ndị ahụ kwekọrọ na isi ihe PCB, isi ihe na-adabara n'ụzọ ziri ezi, isi ihe dabara adaba. njehie, na ntụziaka na-atụgharị)

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