Kafukufuku ndi chitukuko cha kusinthitsa magetsi, Kupanga kwa PCB ali ndi udindo wofunikira kwambiri. A PCB yoyipa imakhala ndi magwiridwe antchito a EMC, phokoso lalikulu, kuthekera kotsutsana ndi zosokoneza, ndipo ngakhale ntchito zoyambira ndizolakwika.

Osiyana pang’ono ndi ma PCBS ena, ma PCBS osintha mphamvu ali ndi mawonekedwe awo. Nkhaniyi ifotokoza mwachidule zina mwazinthu zofunikira kwambiri zamagetsi a PCB posinthira magetsi kutengera luso laukadaulo.

1, malo

Kutalikirana kwa mizere kuyenera kulingaliridwa pazogulitsa zamagetsi. Kusiyanitsa komwe kungakwaniritse zofunikira zalamulo lachitetezo ndichabwino kwambiri, koma nthawi zambiri pazinthu zomwe sizikufuna chiphaso, kapena zomwe sizingakwaniritse chizindikiritsocho, kutalikirana kumatsimikizika ndi chidziwitso. Ndikutalikirana kotani koyenera? Muyenera kuganizira zopanga ngati kutsimikizira bolodi loyera, chinyezi cha chilengedwe, kuipitsa kwina kudikirira momwe zingakhalire.

Pogwiritsa ntchito mains, ngakhale bolodi itha kutsimikizika kuti ndi yoyera komanso yosindikizidwa, MOS chubu yamagetsi yamagetsi pafupi ndi 600V, yochepera 1mm ndiyowopsa kwambiri!

2. Zigawo m’mphepete mwa bolodi

Patch capacitance kapena zida zina zosavuta kuwonongeka m’mphepete mwa PCB, malangizo a ziboda za PCB ayenera kukumbukiridwa poyika. Chithunzicho chikuwonetsa kuyerekezera kwa kupsinjika kwa zida pazinthu zosiyanasiyana.

CHITH. 1 Kuyerekeza kupsinjika pa chipangizocho mbaleyo ikagawanika

Titha kuwona kuti chipangizocho chiyenera kukhala kutali ndi kufanana ndi m’mphepete mwa ziboda, apo ayi chigawochi chitha kuwonongeka chifukwa cha ziboda za PCB.

3. Malo ozungulira

Kaya zolowetsa kapena zotulutsa, mphamvu yamagetsi kapena kuzungulira kwa chizindikiro, ziyenera kukhala zazing’ono momwe zingathere. Chingwe champhamvu chimatulutsa gawo lamagetsi lamagetsi, lomwe lingayambitse zovuta za EMI kapena phokoso lalikulu; Nthawi yomweyo, ngati ilandiridwa ndi mphete yolamulira, itha kuyambitsa zosiyana.

Kumbali inayi, ngati gawo lamphamvu yamagetsi ndilokulirapo, kulowerera kofanana kwa majeremusi kudzawonjezeka, komwe kumawonjezera kukokomeza kwa phokoso.

4. Chingwe cholumikizira

Chifukwa cha mphamvu ya DI / DT, kuchepa kwa njira yamphamvu kuyenera kuchepetsedwa, apo ayi gawo lamagetsi lamagetsi limapangidwa. Ngati mukufuna kuchepetsa kutaya mtima, makamaka ndikufuna kuchepetsa kutalika kwa zingwe, kuwonjezera zomwe zikuchitika m’lifupi ndizochepa.

5. Zingwe zazingwe

Pa gawo lonse lowongolera, kulingalira kuyenera kuperekedwa kulumikizana ndi gawo lamagetsi. Ngati awiriwa ali pafupi wina ndi mnzake chifukwa cha zoletsa zina, chingwe chowongolera ndi chingwe cha magetsi siziyenera kufanana, apo ayi zitha kuchititsa kuti magetsi azigwira ntchito modabwitsa.

Kuphatikiza apo, ngati chingwe chowongolera ndichachitali kwambiri, mizere iwiri yakutsogolo ndi yoyandikira iyenera kukhala yoyandikana wina ndi mnzake, kapena mizere iwiri iyikidwe mbali ziwiri za PCB zomwe zikuyang’anizana, kuti muchepetse malo ozungulira ndi kupewa kusokonezedwa ndi gawo lamagetsi lamagawo amagetsi. CHITH. 2 ikuwonetsa njira zolondola komanso zolakwika za mayendedwe pakati pa A ndi B.

Chithunzi 2 Njira zolondola ndi zolakwika za chingwe.

Zachidziwikire, mzere wazizindikiro uyenera kuchepetsa kulumikizana kudzera m’mabowo!

6, mkuwa

Nthawi zina kuyika mkuwa sikofunikira kwenikweni ndipo kuyenera kupewedwanso. Ngati mkuwawo unali waukulu mokwanira komanso mphamvu zake zimasiyanasiyana, imatha kukhala ngati tinyanga, ikumayatsa mafunde amagetsi pozungulira. Kumbali ina, ndikosavuta kutenga phokoso.

Nthawi zambiri, kuyika mkuwa kumangololedwa pamalumikizidwe, monga “nthaka” yomwe imatha kumapeto, yomwe imatha kukulitsa kutulutsa mphamvu ndikuwononga phokoso.

7, kupanga mapu,

Pazizunguliro, mkuwa ukhoza kuyikidwa mbali imodzi ya PCB, yomwe imadzipangira mapangidwe ake kulumikizana ndi mbali inayo ya PCB kuti ichepetse kuyika kwa dera. Zili ngati zovuta zingapo zamitundumitundu zimalumikizidwa chimodzimodzi, ndipo pakadali pano zisankha njirayo mosavomerezeka kwambiri.

Mutha kusanja gawo lolamulira la mbali imodzi, ndikuyika mkuwa pa “nthaka” mbali inayo, ndikulumikiza mbali ziwirizo kudzera pa bowo.

8. Chotsitsa chotsatsira chotulutsa

Ngati chiwonetsero chazakonzedweratu chikuyandikira kutulutsa, sikuyenera kuikidwa mofanana ndi zomwe zatulutsidwa. Kupanda kutero, gawo lamagetsi lamagetsi lomwe limapangidwa pa diode lidzalowerera kuzungulira komwe kumapangidwa ndimphamvu zamagetsi ndi katundu wakunja, kuti phokoso lowerengeka likweze.

CHITH. 3 Kuyika ma diode molondola komanso molakwika

9, waya wapansi,

Kulumikizana kwa zingwe zapansi kuyenera kusamala kwambiri. Kupanda kutero, EMS, EMI ndi magwiridwe ena atha kuwonongeka. Pogwiritsa ntchito magetsi “nthaka” ya PCB, osachepera mfundo ziwiri izi: (1) mphamvu yamagetsi ndi nthaka yolowera, iyenera kukhala yolumikizira imodzi; (2) Pasapezeke malo ozungulira.

10. Y capacitance

Kulowetsa ndi kutulutsa nthawi zambiri kumalumikizidwa ndi Y capacitor, nthawi zina pazifukwa zina, mwina sizingathe kupachikidwa pamalo olowera, kukumbukira, panthawiyi, ziyenera kulumikizidwa ndi malo amodzi, monga ma voliyumu akulu.

11, zina

Mukamapanga PCB yamagetsi enieni, pakhoza kukhala zovuta zina zofunika kuziganizira, monga “varistor iyenera kukhala pafupi ndi dera lotetezedwa”, “njira yodziwika yodziwitsira kukweza mano”, “chip VCC magetsi iyenera kuonjezera capacitor ”ndi zina zotero. Kuphatikiza apo, kufunikira kwa chithandizo chapadera, monga zojambulazo zamkuwa, kutetezedwa, ndi zina zambiri, ziyenera kuganiziridwanso pagawo la kapangidwe ka PCB.

Nthawi zina nthawi zambiri amakumana ndi mfundo zingapo zomwe zimasemphana, kuti akwaniritse chimodzi mwazomwe sizingakwaniritse zinazo, uku ndikofunikira kwa mainjiniya kuti agwiritse ntchito zomwe akudziwa, malinga ndi zosowa zenizeni za projekiti, kuti adziwe zingwe zoyenera kwambiri!