Ukushintsha i-Power PCB Design kanye Nokukhiqiza

 I-Highleap Electronics ingumhlinzeki ophelele we-PCB wokukhiqiza kanye nomhlangano osebenzela imikhakha yezokwelapha, yezimboni, yezimoto, neyomthengi kagesi. Ukushintsha ama-PCB kagesi abonisa ubuchwepheshe bethu ekwakhiweni kwefrikhwensi ephezulu lapho ukubekwa kwengxenye kunquma impumelelo noma ukwehluleka. Kusukela kumashaja e-USB angu-5W kuya ku-3kW amandla wezimboni, siletha amabhodi adlula ukusebenza kahle nokuthembeka okulindelekile. I-Highleap Electronics iletha ukukhiqiza amandla we-PCB okushintshayo ngobuchwepheshe bokulawula i-EMI, ukuphatha okushisayo, kanye nokwenza kahle kwe-high-frequency.

Ukuthuthukisa I-Loop Yamandla: Indlela Ebalulekile

Iluphu yokushintsha eyinhloko—kusuka ku-capacitor yokufaka ngokushintsha okuseceleni okuphezulu, ukushintshwa kohlangothi oluphansi, nokubuyela phansi—inquma yonke into ekusebenzeni kwe-SMPS. Le loop ikhipha amandla kazibuthe kagesi ngokulingana nendawo yawo. Iluphu engu-400mm² ingase yehluleke ku-EMI ngo-20dB, kuyilapho ilungiselela ukudlula okungu-200mm² ngemajini.

Kodwa ukunciphisa indawo ye-loop kudinga ukuqonda ukugeleza kwamanje. Amagagasi amaza aphezulu alandela indlela ye-inductance encane, hhayi ukumelana. Ku-500kHz, i-return current igeleza ngokuqondile ngaphansi komkhondo wayo oya phambili endizeni yaphansi. Noma yikuphi ukuphazamiseka—i-slot, via, noma ukuhlukana kwendiza—kuphoqa ukuba kuphambuke, kwakheka uthi.

Isibonelo sangempela: I-adaptha engu-100W yehlulekile i-EMI ngo-15dB. Uphenyo lwembule ukuthi izikhala zendiza yasemhlabeni ziphoqa amaza okubuyela emuva, ziphinde ziphindwe kathathu indawo yeluphu esebenzayo. Ukugcwalisa lezi zikhala ngomzila oqondile kwenye ungqimba kuxazulule inkinga ngokuphelele.

Ukumelana kwe-MOSFET kanye nokulahlekelwa kokuqhuba kuyahlukahluka ngokushisa kwe-junction. Sebenzisa ama-curve eshidi ledatha ledivayisi ekhethiwe kanye nogesi osebenzayo ukuze ulinganisele ukulahlekelwa kunokusebenzisa ukwanda kwephesenti elilodwa kuwo wonke amadivayisi. Hlola ukusabalala kokushisa kwethusi, ukwabelana ngogesi lapho kusetshenziswa khona amadivayisi afanayo, kanye nemikhuba ye-PCB yokuphathwa kokushisa , bese uqinisekisa amazinga okushisa ukuze uthole umthwalo onzima kakhulu kanye nezimo zokupholisa.

Izendlalelo Ezine vs Okubili: Ukwenza Ukukhetha Okulungile

Ingcindezi yezindleko iphushela kumabhodi anezendlalelo ezimbili, kodwa izendlalelo ezine zivame ukufakazela ukonga kakhulu kukonke. Izindleko ezingeziwe ze-PCB (ezijwayelekile ezingama-40-60%) ziqeda izihlungi ezibizayo nokuvikela kuyilapho kuthuthukisa ukusebenza ngendlela emangalisayo.

Imikhawulo yezendlalelo ezimbili:

• I-Ground ibuyisela i-mender, ikhulisa i-inductance
• Akukho ukuvikela phakathi kokulandela okunomsindo nokuzwelayo
• Ukusabalalisa okushisayo okungalungile ngaphandle kwethusi langaphakathi
• Izixazululo ze-EMI zidinga izihlungi zangaphandle

Izinzuzo zezendlalelo ezine:

• Indiza yaphansi eqinile inciphisa ukukhishwa kwe-10-15dB
• I-impedance elawulwayo yamasignali anesivinini esikhulu
• Izindiza zamandla zangaphakathi zinciphisa ukwehla kwamandla kagesi
• Ukuphatha okushisayo okuphezulu

Iphoyinti loshintsho liyahlukahluka, kodwa cabangela izendlalelo ezine lapho amandla edlula u-25W, imvamisa idlula u-200kHz, noma izimfuneko ze-EMI ziqinile. Izindleko ezikhulayo zivame ukuqeda izingxenye eziningi zokuhlunga, empeleni zehlise izindleko zesistimu.

Imiklamo yethu ye-PCB enamandla amakhulu isebenzisa ukwakhiwa kwezingqimba eziningi ukuze isebenze kahle kakhulu endaweni encane.

Ukuhlanganiswa kwe-Transformer Noise Management

I-transformer ibusa usayizi we-SMPS, izindleko, nesiginesha ye-EMI. Ukuhlanganiswa kwe-PCB okungalungile kumosha imizamo yomklami we-transformer futhi kwehlisa izinga lokusebenza.

Qala ngomkhondo. Ama-transformer akhiqiza ukushisa okudinga ukukhululeka kokushisa ukuze kufakwe isandla ngesikhathi sokwenza i-prototyping. Kodwa lezi zokuphumula zandisa ukumelana nokukhiqiza. Isixazululo: imilobo yezinyawo ezimbili—eyodwa enokukhululeka okushisayo kwama-prototypes, enye enokuxhumana okuqinile kokukhiqizwa.

Ukuvuza kwe-inductance kubangela ama-voltage spikes agcizelela ukushintshwa nokukhiqiza i-EMI. Ngenkathi ukwakhiwa kwe-transformer ngokuyinhloko kunquma ukuvuza, ukwakheka kwe-PCB kuthinta kakhulu imiphumela yako. Beka izingxenye ze-snubber ngokushesha eduze nezikhonkwane ze-transformer-imilimitha ngayinye yengeza i-inductance evimbela ukumuncwa kwe-spike okufanele.

Ama-shield windings adinga ukunakwa okukhethekile. Xhuma izihlangu emhlabathini othule, hhayi ukushintsha umhlaba. Ukuxhumanisa izihlangu zendlela kude nezimpawu ezibucayi. Eminye imiklamo izuza ezivikelweni ezimbili—eziyinhloko kuya emhlabathini oyinhloko, ezingezansi kuya emhlabathini wesibili—ezinikeza ukwenqatshwa kwemodi evamile okuphezulu okuthuthukisiwe ngobuchwepheshe bethu be- PCB yamandla okushintsha.

Ngemuva kokuhlanganiswa, ikhwalithi yokudayiswa ekushintsheni kukagesi we-PCB iba bucayi. Izikhonkwane ze-Transformer, i-high-current traces, kanye nezingxenye zokukhipha ukushisa zidinga amajoyini e-solder afanayo ngokumanzisa okuphelele ukuze kuqinisekiswe kokubili ukwethembeka kukagesi kanye nokuhamba kokushisa. Kufanele kuqashelwe ukuze kugwenywe ama-solder amaningi, amajoyinti abandayo, noma amabhuloho angase abeke engcupheni amabanga okushisa noma akhe izindawo ezishisayo. Izibopho ze-solder ezingaguquki aziqinisekisi nje kuphela ukwethembeka kwesikhathi eside kodwa futhi zinciphisa imiphumela ye-parasitic engase ibe nomthelela ekusebenzeni kwe-EMI.

Inzwa Yamanje Yokuvikela Nokulawula

Inzwa yamanje enembile inika amandla ukuvikela okudlulele, ivimbele ukugcwala kwesikhala, futhi ithuthukise ukusebenza kahle. Kodwa izimuncagazi ze-PCB zonakalisa izilinganiso, zibangele ukungazinzi noma ukuvikeleka okwanele.

Ukuqaliswa kwe-Shunt resistor: I-voltage kuyo yonke i-shunt engu-10mΩ ku-10A ingu-100mV kuphela—ingonakaliswa kalula ngumsindo. Impumelelo idinga:

• Uxhumano lwe-Kelvin lwe-Four-terminal luyisibopho
• Ukubhanqa okuhlukile komzila wemigqa yenzwa
• Isikhulisi sezinzwa samanje esiseduze ne-shunt
• Izindandatho zokuvikela ezivimbela umjovo womsindo

Ukuzwa kwe-transformer kwamanje: Ama-CT ahlinzeka ngokuhlukaniswa kodwa adinga ukusetshenziswa ngokucophelela:

• Ukumelana nomthwalo ngqo kumatheminali e-CT
• I-clamping diode yokuvikela isiyingi esivulekile
• Ukuzulazula kude nezinkundla kazibuthe
• Isakhiwo se-Symmetric sebhalansi

Lezi zindlela ziqinisekisa ukulinganisa kwamanje okunembile okubalulekile ekusebenzeni okuthembekile kwe-SMPS, kungakhathaliseki ukuthi kuma -PCB omshayeli we-LED noma kuzinhlelo zokusebenza ze-PCB zokulawula ukushaja okusheshayo.

Ukuhlunga kwe-EMI kanye Nokuhambisana

Ukuthobela i-EMI akuyona inketho—kudingeka ngokomthetho. Idizayini efanele ye-PCB yehlisa izimfuneko zokuhlunga futhi iqinisekisa isitifiketi sokudlula kuqala.

Ukuklinywa kwemodi evamile kudinga isakhiwo esinokulinganisela ukugcina ukusebenza kahle. Ukulandelela umzila ngokulinganayo ukuya nokusuka ku-CMC. Noma yikuphi ukungalingani kuguqula imodi evamile ibe umsindo ohlukile. Misa ama-bypass capacitor aphezulu anobude obuncane bokulandelela.

Ukubekwa kwesihlungi okokufaka kuthinta kakhulu ukusebenza. Thola izihlungi ekungeneni kwamandla, ngaphambi kokukhiqiza umsindo. Dala ukuhlukana ngokomzimba phakathi kwezigaba ezihlungiwe nezingahlungiwe. Sebenzisa ukusikeka kwendiza yaphansi uphoqa imisinga ngesihlungi, hhayi eduze kwaso.

Lezi zindlela zokulawula i-EMI, ezibalulekile ekwakhiweni kwethu kwe-GaN power PCB , ziqinisekisa ukuhambisana ngaphandle kokuphindaphinda okubizayo.

imibuzo ejwayelekile ukubuzwa

Umbuzo: Kungani ukushintsha kwami ​​ugesi kwehluleka ukuhlolwa kwe-EMI?
IMP: Izimbangela ezivamile zihlanganisa indawo eyiluphu eyeqile, ukungaqini kahle komhlaba, kanye nokuhlunga okunganele. I-Highleap Electronics ivimbela ukwehluleka kwe-EMI ngezakhiwo ezithuthukisiwe ze-loop, izitaki ezifanelekile zezendlalelo ezi-4 ezinezindiza eziqinile zaphansi, kanye nokubekwa kwesihlungi samasu okuzuza >90% izinga lokuthola isitifiketi sokuqala.

Q: Ungathuthukisa kanjani ukushintshwa kwamandla okusebenza kahle?
A: Ukuthuthukiswa kokusebenza kahle kuvela ekunciphiseni ukulahlekelwa kokushintsha, ukwenza kahle kazibuthe, nokusebenzisa ukulungiswa okuvumelanayo. I-Highleap Electronics ifinyelela ukusebenza kahle okungu-95%+ ngezakhiwo ezinembayo, ukuphathwa okushisayo, nokukhethwa kwengxenye ngokucophelela.

Q: Which safety standards apply to ukushintsha izinsiza zamandla?
A: Amazinga ayahluka ngokusebenza: I-IEC 62368-1 yemishini ye-IT, IEC 60601-1 yemishini yezokwelapha. I-Highleap Electronics iqinisekisa ukuthobelana ngesikhala esifanele, izithiyo zokuzihlukanisa, nokukhetha ingxenye yokuphepha. Sihlinzeka ngesitifiketi esisekela amadokhumenti.

Q: Ingabe imiklamo ekhona ye-SMPS ingalungiselelwa usayizi/izindleko?
IMP: Yebo, ngokusebenzisa ukulungiselelwa kwesakhiwo, ukuhlanganisa ingxenye, nokusebenza kahle kokukhiqiza. Ukubuyekezwa kwe-DFM ye-Highleap Electronics ngokuvamile kukhomba amathuba okunciphisa izindleko ngo-20-30% kuyilapho kuthuthukisa ukusebenza kwethu. I-PCB yokushaja eshesha kakhulu ubuchwepheshe be-miniaturization.