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PCB dera bolodi nawonso kutentha, bwerani kuphunzira!

Kutentha kwapang'onopang'ono kwa bolodi la dera la PCB ndilofunika kwambiri, kotero ndi luso lotani la kutentha kwa bolodi la dera la PCB, tiyeni tikambirane pamodzi.

Bolodi ya PCB yomwe imagwiritsidwa ntchito kwambiri pochotsa kutentha kudzera pa bolodi la PCB palokha ndi nsalu yotchinga yamkuwa / epoxy galasi kapena gawo lapansi la nsalu yagalasi ya phenolic resin, ndipo pali pepala lokhala ndi pepala lokhala ndi mkuwa lomwe limagwiritsidwa ntchito. Ngakhale magawowa ali ndi mphamvu zabwino kwambiri zamagetsi ndi zinthu zogwirira ntchito, amakhala ndi kutentha koyipa, ndipo ngati njira yowotcha kutentha kwa zigawo zotentha kwambiri, sangayembekezere kuchititsa kutentha ndi PCB yokha, koma kutulutsa kutentha kuchokera pamwamba. chigawo cha mpweya wozungulira. Komabe, monga zipangizo zamagetsi zalowa mu nthawi ya chigawo cha miniaturization, kuyika kwapamwamba kwambiri, ndi msonkhano wotentha kwambiri, sikokwanira kudalira kokha pamwamba pa malo ochepa kwambiri kuti athetse kutentha. Panthawi imodzimodziyo, chifukwa cha kugwiritsidwa ntchito kwakukulu kwa zigawo zokwera pamwamba monga QFP ndi BGA, kutentha komwe kumapangidwa ndi zigawozo kumaperekedwa ku bolodi la PCB mochuluka, choncho, njira yabwino yothetsera kutentha kwa kutentha ndikuwongolera kutentha kutentha mphamvu ya PCB palokha kukhudzana mwachindunji ndi Kutentha chinthu, amene imafalitsidwa kapena kufalitsidwa kudzera bolodi PCB.

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Dongosolo lowongolera zida

Chithunzi cha PCB

a, chipangizo tcheru kutentha amaikidwa m'dera ozizira mpweya.

 

b, chipangizo chowunikira kutentha chimayikidwa pamalo otentha kwambiri.

 

c, zipangizo zomwe zili pa bolodi lomwelo losindikizidwa ziyenera kukonzedwa momwe zingathere malinga ndi kukula kwake kwa kutentha ndi kutentha kwa kutentha, kutentha pang'ono kapena zipangizo zosakanizika kutentha (monga ma transistors ang'onoang'ono, mabwalo ang'onoang'ono ophatikizidwa, electrolytic capacitors). , etc.) anaika kwambiri kumtunda kwa kuzizira mpweya otaya (polowera), Zipangizo ndi lalikulu kutentha m'badwo kapena zabwino kutentha kukana (monga transistors mphamvu, lalikulu Integrated mabwalo, etc.) amaikidwa pa kutsika kwa kuzirala mtsinje.

 

d, kumbali yopingasa, zida zamphamvu kwambiri zimakonzedwa pafupi ndi m'mphepete mwa bolodi losindikizidwa kuti zifupikitse njira yotumizira kutentha; Panjira yowongoka, zida zamphamvu kwambiri zimakonzedwa moyandikana kwambiri ndi bolodi losindikizidwa, kuti athe kuchepetsa kukhudzidwa kwa zidazi pakutentha kwa zida zina zikamagwira ntchito.

 

e, kutentha kwa kutentha kwa bolodi losindikizidwa mu zipangizo makamaka kumadalira kayendedwe ka mpweya, kotero njira yoyendetsera mpweya iyenera kuphunziridwa mu kapangidwe kake, ndipo chipangizo kapena bolodi losindikizidwa liyenera kukonzedwa moyenera. Pamene mpweya ukuyenda, nthawi zonse umakonda kuyenda komwe kukana kuli kochepa, kotero pokonzekera chipangizo pa bolodi losindikizidwa, m'pofunika kupewa kusiya malo akuluakulu a ndege m'dera linalake. Kukonzekera kwa matabwa angapo osindikizidwa pamakina onse ayeneranso kulabadira vuto lomwelo.

 

f, zipangizo zambiri kutentha-tcheru bwino anaika m'dera otsika kutentha (monga pansi pa chipangizo), musachiike pamwamba chipangizo Kutenthetsa, zipangizo angapo bwino staggered masanjidwe pa ndege yopingasa.

 

g, konzani chipangizocho chogwiritsa ntchito mphamvu kwambiri komanso chotenthetsera chachikulu kwambiri pafupi ndi malo abwino kwambiri ochotsera kutentha. Osayika zida zotentha kwambiri m'makona ndi m'mphepete mwa bolodi losindikizidwa, pokhapokha ngati chipangizo chozizirira chili pafupi nacho. Popanga kukana mphamvu, sankhani chipangizo chokulirapo momwe mungathere, ndipo sinthani mawonekedwe a bolodi losindikizidwa kuti likhale ndi malo okwanira kutentha kutentha.


Nthawi yotumiza: Mar-22-2024