Oniru ti PCB ọkọ nigbagbogbo ni iru ati iru awọn iṣoro bi? Today I love the program network xiaobian recommended this article is engaged in PCB board design for many years of engineers, printed circuit board design experience to share with you. Welcome to collect!

Fun awọn ọja itanna, apẹrẹ igbimọ PCB jẹ ilana apẹrẹ ti o jẹ dandan lati aworan apẹrẹ itanna si ọja kan pato, ati ọgbọn ti apẹrẹ rẹ ni ibatan pẹkipẹki si iṣelọpọ ọja ati didara ọja. Bibẹẹkọ, fun ọpọlọpọ awọn eniyan ti o kan ṣiṣẹ ni apẹrẹ itanna, wọn ko ni iriri diẹ ni abala yii. Botilẹjẹpe wọn ti kọ sọfitiwia apẹrẹ igbimọ PCB, Ṣugbọn awọn apẹrẹ PCB nigbagbogbo ni diẹ ninu awọn iṣoro. Injinia ti a ṣeduro nipasẹ Xiaobian ti n ṣiṣẹ ni apẹrẹ igbimọ PCB fun ọpọlọpọ ọdun. Oun/yoo pin iriri rẹ ni apẹrẹ igbimọ igbimọ Circuit pẹlu rẹ, nireti lati ṣe ipa ti sisọ biriki lati fa jade. Sọfitiwia apẹrẹ PCB ti a ṣe iṣeduro nipasẹ ẹlẹrọ jẹ TANGO ni ọdun diẹ sẹhin, ati ni bayi nlo PROTEL2.7 FUN WINDOWS.

PCB akọkọ

Ibere ​​deede ti gbigbe awọn paati lori PCB:

1, gbe awọn paati pẹlu ipo ti o wa titi ni pẹkipẹki pẹlu eto naa, gẹgẹ bi iho agbara, ina atọka, yipada, asopọ, ati bẹbẹ lọ, awọn paati wọnyi ni a gbe lẹhin iṣẹ LOCK ti sọfitiwia naa lati LOCK, ki o ma baa gbe nipasẹ aṣiṣe;

2, awọn paati pataki ati awọn paati nla ti a gbe sori laini, gẹgẹbi awọn eroja alapapo, awọn oluyipada, IC, ati bẹbẹ lọ;

3. Place small devices.

Ijinna laarin paati ati eti PCB

If possible, all components should be placed within 3mm from the edge of the PCB board or at least greater than the thickness of the PCB board. This is because in mass production of assembly line plug-ins and wave soldering, it should be provided to the guide groove for use. At the same time, in order to prevent edge defects caused by shape processing, if there are too many components on the PCB board, If you have to go beyond the 3mm range, you can add a 3mm auxiliary edge to the edge of the PCB board, and open a V-shaped slot on the auxiliary edge, which can be broken by hand during production.

Isolation between high and low pressure

There are high voltage circuit and low voltage circuit at the same time on many PCB boards, the components of the high voltage circuit and the low voltage part should be separated and open, and the isolation distance is related to the withstand voltage. Normally, the PCB board should be 2mm away from the withstand voltage at 2000kV, and the proportion above this should be increased, for example, if the withstand voltage test is 3000V, Aaye laarin awọn laini giga ati kekere yẹ ki o jẹ diẹ sii ju 3.5mm, ni ọpọlọpọ awọn ọran lati yago fun isokuso, ṣugbọn tun ninu igbimọ PCB laarin iho giga ati kekere foliteji.

PCB board cabling

The layout of printed conductors should be as short as possible, especially in high frequency circuits; Titan okun waya ti a tẹjade yẹ ki o wa ni yika, ati Igun ọtun tabi Igun didasilẹ yoo ni ipa lori iṣẹ itanna ni ọran ti Circuit igbohunsafẹfẹ giga ati iwuwo okun; When wiring two panels, the wires on both sides should be perpendicular, oblique, or bent to avoid parallel to each other to reduce parasitic coupling. Printed wires used as input and output of the circuit should be avoided parallel to each other as far as possible to avoid feedback. It is best to add grounding wires between these wires.

Awọn iwọn ti tejede waya

The width of the wire should meet the requirements of electrical performance and be convenient for production. Its minimum value depends on the size of the current, but the minimum should not be less than 0.2mm. In high density, high precision printed lines, wire width and spacing is generally desirable 0.3mm; Igbesoke iwọn otutu ti iwọn okun yẹ ki o gbero ninu ọran ti isiyi giga. Idanwo ẹgbẹ kan fihan pe nigbati sisanra ti bankanje Ejò jẹ 50μm, iwọn ti okun waya jẹ 1 ~ 1.5mm ati lọwọlọwọ jẹ 2A, ilosoke iwọn otutu jẹ kere pupọ. Nitorinaa, okun waya pẹlu iwọn ti 1 ~ 1.5mm le pade awọn ibeere apẹrẹ laisi nfa ilosoke iwọn otutu.

Awọn okun ilẹ ti o wọpọ fun awọn oludari atẹjade yẹ ki o nipọn bi o ti ṣee ṣe, ni lilo awọn laini ti o tobi ju 2 si 3mm ti o ba ṣeeṣe, ni pataki ni awọn iyika pẹlu microprocessors. Nitori laini agbegbe jẹ itanran pupọ, nitori iyipada ti ṣiṣan lọwọlọwọ, awọn iyipada agbara ilẹ, ailagbara ipele ifihan akoko microprocessor, yoo jẹ ki ifarada ariwo bajẹ; Awọn ipilẹ 10-10 ati 12-12 le ṣee lo nigbati wiwakọ laarin awọn pinni IC IC DIP, iyẹn ni, nigbati awọn okun meji ba kọja laarin awọn pinni, iwọn ila paadi le ṣee ṣeto si 50mil, iwọn laini ati aye laini jẹ 10mil, nigbati okun waya kan ṣoṣo ti kọja laarin awọn pinni, iwọn paadi le ṣee ṣeto si 64mil, iwọn laini ati aye laini jẹ 12mil.

Alafo ti tejede onirin

The spacing between adjacent wires must meet the requirements of electrical safety, and for the convenience of operation and production, the spacing should be as wide as possible. Ijinna to kere julọ gbọdọ jẹ o kere o dara fun foliteji lati ṣetọju. This voltage generally includes the operating voltage, the additional fluctuation voltage and the peak voltage caused by other reasons.

Ti awọn ipo imọ -ẹrọ ba gba iwọn diẹ ninu iyoku irin laarin awọn okun waya, aye naa yoo dinku. Nitorina onise yẹ ki o ṣe akiyesi ifosiwewe yii nigbati o ba gbero foliteji. Nigbati iwuwo wiwọn jẹ ẹni -kekere, aye ti laini ifihan le pọ si ni deede, laini ifihan pẹlu iyatọ nla ti giga, ipele kekere yẹ ki o kuru bi o ti ṣee ṣe ki o pọ si aye.

Idabobo ati ilẹ ti awọn okun onirin

Waya ilẹ ti gbogbo eniyan ti okun waya ti a tẹjade yoo jẹ idayatọ lori eti igbimọ Circuit ti a tẹjade bi o ti ṣee ṣe. Bi bankanje Ejò bi o ti ṣee ṣe yẹ ki o wa ni ipamọ bi okun ilẹ lori ọkọ PCB, ki ipa aabo jẹ dara ju okun ilẹ gigun, awọn abuda laini gbigbe ati ipa aabo yoo ni ilọsiwaju, ati tun ṣe ipa kan ni idinku kaakiri ti o pin. Waya ilẹ ti gbogbo eniyan ti okun waya ti a tẹjade dara julọ lati ṣe lupu kan tabi nẹtiwọọki, nitori nigbati ọpọlọpọ awọn iyika iṣọpọ wa lori igbimọ kanna, ni pataki nigbati awọn paati wa ti o jẹ agbara diẹ sii, aropin lori iwọn naa ṣe agbejade iyatọ ti o pọju ilẹ, eyiti fa idinku ti ifarada ariwo, nigbati o di lupu, iyatọ ti o pọju ilẹ ti dinku.

Ni afikun, ilẹ ati aworan agbara yẹ ki o jẹ afiwe si itọsọna ṣiṣan ti data bi o ti ṣee ṣe, eyiti o jẹ aṣiri ti agbara imudara ariwo ariwo; Igbimọ PCB pupọ le gba awọn fẹlẹfẹlẹ pupọ bi fẹlẹfẹlẹ aabo, fẹlẹfẹlẹ ipese agbara, fẹlẹfẹlẹ ilẹ ni a le gba bi fẹlẹfẹlẹ aabo, fẹlẹfẹlẹ gbogbogbo ati fẹlẹfẹlẹ ti a ṣe apẹrẹ ni inu inu ti igbimọ PCB pupọ, ila laini ifihan apẹrẹ inu inu ati fẹlẹfẹlẹ ita.