Umhlahlandlela Wokuklama we-PCB Yokunikezwa Kwamandla e-AC-DC

Umklamo we-PCB wokunikezwa kwamandla we-AC-DC uwumsebenzi wokuhlela izigaba zokuguqulwa ukuze ibhodi liphephe, lisebenze kahle, linomsindo ophansi futhi likhiqizwe ngesikhathi esisodwa - futhi izinkinga eziningi zokunikezwa kwamandla yizinkinga zokuhlelwa, hhayi izinkinga ze-schematic. I-schematic efanele isengakhiqiza ibhodi elihlulekayo yi-Hipot ngoba igebe lokuhlukaniswa lifushane, lishisa ngoba ithusi lincane, noma lihluleka yi-EMC ngoba i-switching loop inkulu. Umklamo omuhle wangaphambili ulayisha lezo zithiyo: ubeka ama-magnetics kanye ne-bulk capacitor kuqala, ulungisa i-creepage kanye ne-clearance kusenesikhathi, uhlela indlela yokushisa ngaphambi kokuhambisa, futhi ugcina ama-high-di/dt loops eqinile. I-Highleap ibuyekeza lezi zici zokuklama njengengxenye ye-DFM kuwo wonke amabhodi amakhulu futhi inika okutholakele emuva ngaphambi kokukhiqiza.

Ufuna isibuyekezo se-DFM sesakhiwo sakho sokunikezwa kwamandla? Thumela umklamo wakho futhi sizohlola isikhala, ithusi kanye nengozi yokushisa ngaphambi kokuthi wakhe. Cela isilinganiso sokuklama nokwakha.

Izinqumo Zokuhlelwa Ezenza Noma Eziphula Ibhodi Lamandla

Indlela obeka ngayo izingxenye ebhodini le-AC-DC inquma kakhulu ikusasa lalo. Ukuhlelwa kwamandla kuqala ezingxenyeni ezinamandla aphezulu - i-transformer, i-primary switch, i-bulk electrolytic capacitor, i-output rectifier - ngoba indawo yazo ilungisa ama-switching loops, izindawo ezishisayo ezishisayo kanye nesithiyo sokuzihlukanisa. Uma lawo ma-anchor esebekwe kahle, lonke ibhodi liwela emgqeni; liwabeke kabi futhi akukho nqwaba yokuqondisa isignali ehlakaniphile ebuyisa umklamo. Lokhu kuphambene nokuhlelwa kwedijithali, lapho uvame ukuqondisa khona indlela yakho yokuphuma endaweni ephakathi nendawo.

Umgomo oqondisayo ukulandela ukugeleza kwamandla ngokomzimba: ukufaka i-AC kanye nesihlungi kolunye uhlangothi, ukulungisa kanye nokugcina inqwaba ngokulandelayo, isigaba sokushintsha kanye ne-transformer phakathi njengesivimbelo, kanye nomphumela olawulwayo kolunye uhlangothi. Ukugcina lokho kugeleza kuqondile kufinyeza izindlela zamandla aphezulu, kuhlukanisa ngokwemvelo okuyinhloko nokwesibili, futhi kunikeza ukushisa endaweni ethile okufanele kuyiwe kuyo. Ibhodi elibekwe ngokumelene nokugeleza kwamandla liphoqa amandla ukuthi abuyele emuva kabili, lelula izihibe futhi lixube izindawo ezinomsindo nezithule - imbangela eyinhloko yesabelo esimangalisayo sokwehluleka kokunikezwa "okuyimfihlakalo".

Izinto Eziza Kuqala Zokubekwa Ngokulandelana

Uma kukhona umkhuba owodwa ohlukanisa ukwakheka kwamandla okuqinile, ukubeka ukugeleza kwamandla kanye nesithiyo kuqala bese kubhekwa njengomphumela. Abaklami abaguqula lokho kuhleleka bavame ukuthola inkinga yesikhala noma yokushisa kuphela lapho isihloko sokuqala sibuya - okuyisikhathi esibiza kakhulu ukuyithola.

Ukuklama Ukwakhiwa Kwezinto Ezintsha Nokucacisa Ibhodi

Isikhala sokuphepha yisithiyo esingenakuthethelelwa kakhulu uma sibhekwa njengento ecatshangwa kamuva. Ukuqhekeka (ibanga elisebusweni) kanye nokuvuleka (ibanga emoyeni) phakathi kwethusi eliyinhloko nelesibili kusethwa yi-voltage yokusebenza, isigaba sokushisa kanye nendawo ezungezile, futhi kumele kwakhiwe kusukela ekubekweni kokuqala - hhayi ukucindezelwa kamuva. Kwibhodi elikhulu le-230VAC, ukuhlukaniswa okuyisisekelo kuvame ukudinga isikhala esilingana namamilimitha ambalwa, kanti ukuhlukaniswa okuqinisiwe kokusetshenziswa kwezokwelapha noma kwangaphandle kungacishe kuphindwe kabili lokho. I-transformer, i-optocoupler kanye ne-Y-capacitor yizingxenye eziwela phezu kwesithiyo, ngakho-ke zinquma ukuthi umugqa uwela kuphi.

Ithuluzi lokuklama elinamandla kakhulu lesikhala yisikhala sokuhlukanisa esiqondiswe ngendlela ethile — isikhala esigayiwe ku-laminate ngaphansi kwezingxenye zomgoqo esikhuphula indlela yokucwila ebusweni ngaphandle kokukhulisa ibhodi. Abaklami bahlanganisa isikhala nendawo yokugcina ehlanzekile lapho kungekho khona ithusi eliyinhloko, i-via, indawo yokuhlola noma ngisho nesikrini se-silk esiwela ohlangothini lwesibili. Uma kwenziwa kusenesikhathi, lokhu kubiza lutho ngaphandle kokuzithiba; uma kwenziwa sekwephuzile, kungaphoqa ukuhlelwa kabusha okugcwele. Lolu uhlobo lwento ngqo umklami oqaphela amandla ayiveza ku-DFM uma umklamo ushiye ungacacile.

Okokufaka Komklamo Wesikhala

Ngenxa yokuthi izibalo eziqondile zincike esimisweni sokuphepha umkhiqizo wakho oqinisekiswe kuso, umthetho wokuklama uwukukhiya izinga kanye neklasi kuqala bese uvumela yonke inombolo yesikhala ilandele kusukela kuyo. Sakha kunoma yikuphi ukuqhekeka kanye nokususwa okucacisiwe umklamo wakho futhi sikuqinisekise nge-Hipot, kodwa indawo eshibhile yokuthola isikhala esifanele ukudluliselwa kwesikimu kuya ekwakhiweni, hhayi ibhentshi lokuhlola.

Umklamo Wokushisa: Ithusi, Ama-Vias kanye Nokubekwa Kwezingxenye

Ugesi uguqula ingxenye enkulu yomthamo wawo ube ukushisa, futhi lapho lokho kushisa kuya khona kuyisinqumo sokwakheka. Ngisho nogesi ongu-100W osebenza kahle ongu-90% uhlakazeka cishe ngo-10W, ugxile ku-switch, kuma-rectifier kanye nama-magnetic. Umklamo wokushisa uwubuciko bokusabalalisa lokho kushisa kube yithusi futhi kuphume ebhodini ngaphambi kokuba kuphekwe ingxenye ezwela kakhulu ekushiseni - cishe njalo ama-capacitor e-electrolytic, ampilo yawo elinganisiwe cishe ibe yisigamu njalo ngo-10°C ekhuphuka ngaphezu kwesilinganiso sawo. Ukugcina ama-cap kude nekhoneni elishisayo ngokuvamile kuyindlela eyodwa yokushisa ephezulu ebhodini.

Ithuluzi liqinile: ithusi elisindayo ukuze linciphise ukumelana nokushisa futhi lisakaze ukushisa, ama-vias okushisa ukuze ahlanganise i-hot pad nethusi elingaphakathi noma elingemuva, ukuthululwa kwethusi okukhulu okusebenza njenge-heatsink, kanye nokuhlukaniswa ngokomzimba phakathi kwemithombo yokushisa nezingxenye ezizwela ukushisa. Ukuze kusabalale kakhulu, i-heatsink esebhodini noma i-laminate yensimbi eyinhloko ithwala ukushisa ithusi lodwa elingenakukuthwala. Umklamo kufanele ufane nohlelo lwethusi nokushisa nokusabalala kwangempela - ibhodi elibukeka kahle ebhentshini lingahluleka endaweni evalekile lapho kungekho ndawo yokushisa.

Amathuluzi Okushisa Nalokho Akuthengela Kona

I-headroom yokushisa akuyona indawo yamabhodi yamahhala echithwayo — iwukuthembeka okuthengwayo. Imiklamo ehluleka ekuqaleni kwensimu ivame ukuba yileyo lapho i-thermal yayiphathwa njengento yokuqinisekisa ngemva kokuhlelwa kunokuba ihlelwe ngesikhathi sayo. Ukufanisa ithusi, ama-via kanye nokubekwa nama-watts angempela yikho okugcina ukunikezwa kuphila empilweni yako ekalwe.

I-EMI ngokuhlelwa: Ukulawula i-Switching Node

Yonke imishini yokushintsha imodi iwumshini wokukhiqiza umsindo ngamabomu — isebenza ngokushintsha ugesi ngokuvula nangokuvala amandla kagesi izikhathi eziyizinkulungwane ngomzuzwana — nokuthi lowo msindo uhlala ngaphakathi ebhodini noma uphuma ukuze wehluleke yini i-EMC umbuzo omkhulu wokuhlelwa. Inkinga yiluphu yokushintsha ye-high-di/dt: indlela ugesi ohamba ngayo njengoba iswishi ivula futhi ivala. Iluphu enkulu iyi-antenna esebenza kahle; iluphu encane, eqinile ayisebenzi. Ukunciphisa leyo ndawo yeluphu kuyindlela yokunyakaza ye-EMI enesisindo esiphezulu etholakalayo, futhi akubizi lutho ngaphandle kokubekwa ngokucophelela.

Kulowo mqondo oyinhloko kulele amasu okusekela: indiza eqinile yomhlabathi ukuze kunikezwe imisinga yokubuya indlela emfushane, kugcinwe ithusi elinomsindo endaweni, kuqondiswe i-gate drive ngokuqinile, futhi kubekwe isihlungi se-X/Y lapho singenza khona umsebenzi waso. Ama-snubbers kanye nama-common-mode chokes ayasiza, kodwa kuyindlela yokwelapha umsindo obekungavinjelwa ukuhlelwa okuhle. Ukuklama i-EMI ngaphandle kushibhile kakhulu kunokuyihlunga, futhi umehluko phakathi kokudlula i-EMC chamber ekuhambeleni kokuqala kanye nomjikelezo obizayo wamabhodi okujikeleza.

• Nciphisa iluphu yokushintsha: gcina iswishi, i-transformer kanye nesivalo esikhulu siqinile ukuze indlela ye-high-di/dt ivale indawo encane.
• Indiza yokubuya eqinile: nika ama-current return currents indlela emfushane, ephansi yokuvimba ukubuyela emthonjeni.
• Ithusi elincane elinomumo oshisayo: i-node yokushintsha i-high-dv/dt kufanele ibe nkulu ngokwanele ukuthwala ugesi, ingasasebenzi.
• Umzila wesango oqinile: imikhondo emifushane yokushayela isango inciphisa ukukhala nomsindo ophumayo.
• Ukubekwa kwesihlungi sokufaka okusebenzayo: Izivalo ze-X/Y kanye ne-common-mode choke zibekwe ukuze zibambe ukukhishwa okuqhutshwayo emthonjeni.
• Indlela ye-Y-cap elawulwayo: i-capacitor yokuphepha enqamula isithiyo esiqondiswe kokubili ukuhambisana ne-EMI kanye nokuthobela ukuhlukaniswa.

Umsebenzi we-EMI uvuza ukuvimbela kunokwelapha njalo. Ibhodi elinciphisa izihibe zalo futhi lihloniphe izindlela zalo zokubuya livame ukudlula i-EMC ngokuhlunga okulula, kuyilapho ibhodi elizishaya indiva ngokuvamile lingenakuhlungwa ukuze lihambisane nanoma yiziphi izindleko ezinengqondo - yingakho sibheka ukwakheka kwe-switching-loop lapho sibuyekeza umklamo wamandla.

Ukuklama Ukwenziwa Nokuhlolwa

Umklamo ungaphelela ngogesi nangokokushisa futhi usabiza kakhulu kunalokho okufanele ngoba awukunaki ukuthi uzokwakhiwa futhi uhlolwe kanjani. Umklamo wokukhiqiza ebhodini lamandla usho ukuhlonipha umkhondo nendawo yangempela yomenzi ngesisindo sethusi osikhethile — ukugqokwa kwethusi elisindayo, ngakho-ke umklamo ongu-4oz udinga isikhala esibanzi kune-1oz — ohlinzeka ngokukhululeka okufanele kokushisa ezindizeni ukuze izingxenye zihlanganiswe, futhi ushiye isikhala sama-drill amakhulu adingwa yi-magnetics kanye nama-bulk capacitor. Lezi akuzona izithiyo ezibeka engcupheni umklamo; yizona ezivumela ukuthi wakhiwe ngokuphindaphindiwe ngevolumu.

Umklamo wokuhlola uwumkhakha ohambisanayo: ukushiya izindawo zokuhlola ezifinyeleleka kalula zama-rails nama-node okuphendula, ukuhlela ibhodi ukuze isithiyo sokuhlukaniswa singahlolwa yi-Hipot, kanye nokuhlela amaphaneli ngokuhlakanipha ukuze kuhlanganiswe. Ibhodi elaklanywe ngokuhlolwa libamba amaphutha emgqeni esikhundleni sensimu. Uma sibuyekeza ukwakheka, ukukhiqizwa kanye nokuhlolwa kuyingxenye yokudlula okufanayo nokwesikhala kanye nokushisa - ngoba ibhodi elingenakwakhiwa noma elihlolwe ngokwezomnotho akuyona ngempela idizayini eqediwe.

Indlela i-Highleap Esekela Ngayo Umklamo Wakho We-PCB Wamandla

I-Highleap Electronics iyingxenye yokwakhiwa komklamo, okusho ukuthi umnikelo wethu owusizo kakhulu ukuvala iluphu phakathi kwalokho okudwebile nalokho okungakhiwa ngokwethembeka. Uma uthumela ukwakheka kwamandla, siyakubukeza ukuze sibone izinto ezicwilisa amabhodi kagesi: ukucwila kanye nokususwa kwesikhala ngokumelene nesigaba sakho sokuphepha esishiwo, isisindo sethusi uma kuqhathaniswa nomthwalo wamanje kanye nowokushisa, indawo yokushintshashintsha, ukufaneleka kokushisa kanye nokuthulula, kanye nokukhiqizwa kwesisindo sethusi osikhethile. Sizondla lezo zithole ngaphambi kokukhiqiza, kuyilapho izinguquko zisashibhile.

Ukusuka lapho sakha futhi sihlanganise ibhodi olicwengisisile — elinohlangothi olulodwa ngokusebenzisa izingqimba eziningi, ithusi eliyi-1oz kuya kwele-6oz+ elisindayo, izinketho ze-high-Tg kanye ne-metal-core, izikhala zokuhlukanisa eziqondisiwe, i-mixed THT kanye ne-SMT assembly — kanye ne-Hipot- kanye nokusebenza-ukuhlola umphumela ukuze isithiyo kanye nokunikezwa kuqinisekiswe. Ugcina ubunikazi bomklamo; siyaqinisekisa ukuthi inguqulo eya ekukhiqizweni iyona ezodlula, isebenze futhi ihlale isikhathi eside. Lokho kubambisana yikho okuguqula uhlelo oluhle lube ugesi okhiqizwayo.

Ingabe unesakhiwo sokunikezwa kwamandla ofuna sihlolwe ingcindezi ngaphambi kokukhiqiza? Sithumelele impendulo ye-DFM kanye nesilinganiso sokwakha. Thola impendulo ye-DFM kanye nesilinganiso.

Ngesikhathi sokubuyekezwa kokwakheka, sebenzisa ukwesekwa komklamo we-PCB we-Highleap , amanothi e-PCB okulawula ukuvinjelwa , uhlu lokuhlola lwe-PCB DFM , isiqondiso sokuhlinzekwa kwamandla ethusi elisindayo , umhlahlandlela wokuhlola kagesi , kanye nereferensi yezinto ze-FR4 ukuze ubambe izingozi zokukhiqiza kusenesikhathi.