Mo le suʻesuʻega ma le atinaʻeina o le fesuiaʻi o paoa sapalai, PCB tisaini nofo i se tulaga taua tele. A bad PCB has poor EMC performance, high output noise, weak anti-interference ability, and even basic functions are defective.

E fai si eseʻese mai isi PCBS mea faigaluega, e fesuiaʻi le mana PCBS o loʻo iai latou lava uiga. Lenei tusitusiga o le a talanoa puʻupuʻu e uiga i nisi o sili ona taua mataupu faʻavae o PCB faʻapipiʻi mo fesuiaʻi le paoa sapalai faʻavae i le inisinia poto masani.

1, avanoa

E tatau ona iloiloina le va o laina mo oloa maualuga volitiga. O le vavalalata e mafai ona faʻamalieina ai manaʻoga o tulafono faʻatatau mo le saogalemu o le mea moni e sili ona lelei, ae o le tele o taimi mo oloa e le manaʻomia tusipasi, pe le mafai ona faʻamalieina le tusi pasi, o le vavalalata e fuafuaina e le poto masani. O le a le lautele o le avanoa e talafeagai? E tatau ona mafaufauina gaosiga pe e mautinoa le laupapa luga mama, siʻosiʻomaga sūsū, isi faʻatagaina faatali mo se tulaga faʻapefea.

Mo le sao autu, e tusa lava pe o le laupapa luga mafai ona mautinoa mama ma faʻamau, MOS faagaau faʻamamaina eletise puna latalata i le 600V, itiiti ifo i le 1mm e sili atu le mataʻutia!

2. Vaega i le pito o le laupapa

Mo le patch capacitance poʻo ni isi mea faigofie ona faʻaleagaina i le pito o PCB, e tatau ona amanaʻia le faʻasologa o le PCB i le taimi e tuʻu ai. O le ata faʻaalia le faʻatusatusaga o le faʻamamafa i luga o masini i lalo o le tele o metotia faʻatulagaina.

ATA 1 Faʻatusatusaga o faʻafitauli i luga o le masini pe a vaelua le ipu

E mafai ona vaʻaia o le masini e tatau ona o ese mai ma tutusa i le pito o le splitter, a faʻapea e mafai ona faʻaleagaina le vaega ona o le PCB splitter.

3. Vaega o le Loop

Whether input or output, power loop or signal loop, should be as small as possible. O le matasele matasele emitt electromagnetic fanua, lea o le a taitai atu ai i le leaga EMI uiga poʻo tele gaosiga leo; At the same time, if received by the control ring, it is likely to cause an exception.

I leisi itu, afai o le paoa matasele eria e tele atu, o le tutusa faʻapipiʻi parasite o le a faʻateleina foi, lea e ono faʻatuputeleina ai le maualuga o le leo paʻu.

4. Key faʻamau

Ona o le aafiaga o DI / DT, le inductance i le node malosi e tatau ona faʻaititia, a leai o le a faʻatupuina malosiaga electromagnetic fanua. Afai e te manaʻo e faʻaititia inductance, manaʻo tele e faʻaititia le umi o uaea, faʻateleina lautele lautele gaioiga.

5. Uaea faailo

Mo le vaega atoa e faʻatonutonu ai, mafaufau e tatau ona tuʻuina atu i le faʻamamaina o laina mai le vaega o le paoa. Afai o le lua e latalata i le tasi ona o isi tapulaʻa, o le laina faʻatonutonu ma le laina eletise e le tatau ona tutusa, a leai e ono aʻafia ai i le le masani ai faʻagaioiga o le paoa sapalai, teʻi.

In addition, if the control line is very long, a pair of back and forth lines should be close to each other, or the two lines should be placed on the two sides of the PCB facing each other, so as to reduce the loop area and avoid interference by the electromagnetic field of the power part. ATA Faʻailoa mai e le saʻo ma le le saʻo laina faʻasologa auala i le va o le A ma le B.

Ata 2 Faʻasaʻo ma sesē faʻailo uaea auala faʻasolosolo auala.

Ioe, o le laina faʻailo e tatau ona faʻaititia ai le fesoʻotaʻiga i pu!

6, apamemea

O isi taimi o le tuʻuina o le ‘apamemea e matua le manaʻomia lava ma e tatau foʻi ona alofia. Afai e lapoʻa le ‘apamemea ma e fesuisuiaʻi lona malosiʻaga, e mafai ona avea o se antenna, o loʻo faʻataʻamilomiloina galu eletise o loʻo siʻomia ai. I leisi itu, e faigofie ona piki ni leo.

O le mea e masani ai, o le tuʻuina o le apamemea e faʻatagaina i luga o faʻamau faʻamau, e pei o le “eleele” faʻamau i le iuga o galuega, lea e mafai ona faʻateleina ai le malosiʻaga o le gaosiga ma faʻamama nisi o faʻailo leo.

7, faʻafanua,

Mo se taamilosaga, apamemea mafai ona tuʻu i le tasi itu o le PCB, lea otometi faʻafanua i uaea i le isi itu o le PCB e faʻaitiitia ai le impedance o le matagaluega. E pei lava o se seti o faʻafitauli ma eseʻese faʻafitauli taua e fesoʻotaʻi tutusa, ma o le taimi nei o le a otometi lava filifilia le ala ma le maualalo faʻafitauli e tafe i totonu.

E mafai ona e faʻaaogaina le uaea vaega o le taʻamilosaga i le tasi itu, ma faʻataʻoto le ‘apamemea i luga o le “eleele” faʻamau i leisi itu, ma faʻafesoʻotaʻi ia itu e lua i se pu.

8. Faʻamau diode rectifier

Afai o le galuega faatino rectifier diode e latalata i le galuega faatino, e le tatau ona tuu tutusa i le gaioiga. A le o lea, o le eletise eletise faia i le diode o le a ulu i totonu o le matasele na faia e le malosiaga faʻatinoina ma le avega i fafo, ina ia faʻatuputeleina leo faʻatuputeleina leo.

ATA 3 Saʻo ma le saʻo le faʻatulagaina o diodes

9, uaea palapala,

O le uaea o uaea uaea e tatau ona matua faʻaeteete. A leai, EMS, EMI ma isi faʻatinoga ono leaga. Mo le fesuiaʻi o le eletise sapalai PCB “eleele”, a itiiti mai o mea ia e lua: (1) eletise eleele ma faʻailoga eleele, e tatau ona tasi fesoʻotaʻiga manatu; (2) E le tatau ona i ai se faʻasologa o le eleele.

10. I capacitance

Faʻaulufaleina ma galuega faatino e masani ona fesoʻotaʻi i le Y capacitor, o nisi taimi mo ni mafuaʻaga, atonu e le mafai ona tautau i luga o le input capacitor ground, manatua i lenei taimi, tatau ona faʻafesoʻotaʻi i se static node, pei o le maualuga voltage terminal.

11, isi

Pe a fuafuaina le PCB o le moni sapalai o le paoa, atonu e i ai ni isi mataupu e mafaufau i ai, e pei o le “e tatau ona latalata le varistor i le matagaluega puipuia”, “masani auala induction e faʻatele ai le lafoa o nifo”, “malamala VCC mana sapalai tatau faateleina le capacitor ”ma isi. I se faʻaopopoga, o le manaʻoga mo faʻapitoa togafitiga, pei o apamemea foil, talita, ma isi, tatau foi ona mafaufauina i le PCB ata faʻavae.

O nisi taimi e masani ona fetaiaʻi ma le tele o mataupu faʻavae feteʻenaʻi ma le tasi ma le isi, e feiloaʻi ai i se tasi o latou e le mafai ona faʻafetaui le isi, o le manaʻoga lea mo inisinia e faʻaogaina poto masani o loʻo i ai, e tusa ai ma mea moni e manaʻomia e le poloketi, fuafua le sili ona talafeagai uaea!