I-GaN Power PCB Design and Fabrication Services

I-GaN Power PCB: Ichaza Kabusha Idizayini Yamandla Emvamisa Ephakeme

I-GaN power PCB (ephinde ibizwe nge-Gallium Nitride PCB noma ibhodi lamandla elisuselwa ku-GaN) yakhelwe ugesi wamandla wesizukulwane esilandelayo. Ngokufaka i-silicon ngamadivayisi e-GaN, lawa mabhodi afinyelela ekushintsheni kwe-nanosecond okushesha kakhulu, ukusebenza kahle okuphezulu, nokuminyana kwamandla okungenakuqhathaniswa—okulungele izinhlelo zokusebenza ezifana nokushaja kwe-EV, iziguquli zamandla avuselelekayo, izinhlelo ze-aerospace, namamojula wamandla ocingo.

Kungani i-GaN Power ihlukile

I-GaN (Gallium Nitride) iyi-semiconductor ene-wide-bandgap evumela ama-transistors ukuthi ashintshele ku-10x ngokushesha kunama-MOSFET endabuko. Isibonelo, i-GaN FET ingashintsha isuka ku-0V iye ku-600V ngaphansi kwama-5ns, yehlise ngokumangazayo ukulahleka kwamandla futhi inike amandla amadizayini ahlangene, amafrikhwensi aphezulu.

Dizayina Izinselelo kuma-GaN Power PCBs

Ijubane lokushintsha elinjalo elibi kakhulu lenza ukwakheka kwe-PCB kube yinto ebalulekile. Ngisho ne-1nH yokungena kwe-parasitic kungabangela ukushaqeka okukhulu kwe-voltage. Ukuqinisekisa ukuthembeka, i-Highleap Electronics isebenzisa amasu athuthukile afana nalawa:

• Izihibe zamandla ezincishisiwe zikalwe zaba amamilimitha
• Ngokusebenzisa amalungu afanayo okugeleza kwamanje okume mpo nge-inductance encishisiwe
• I-trace geometry ethuthukisiwe, ukubeka phansi, nokulawula izinambuzane

Izinzuzo Zokusebenza

Lapho eklanywe kahle futhi ekhiqizwa kahle, ama-PCB amandla e-GaN avula amazinga okusebenza angafinyeleleki ngamabhodi e-silicon:

• Ukusebenza kahle kusondela ku-99% ngokulahleka kwamandla okuncane
• Ukuminyana kwamandla okudlula u-100W/in³ kumasistimu ahlangene
• Ukushintsha amafrikhwensi kufikela ku-10MHz kunika amandla kazibuthe amancane

Kwa-Highleap Electronics, sihlanganisa ukwenziwa kwe-PCB ngokunemba nobuchwepheshe bethusi obunzima obuqinisekisiwe ukusekela imiklamo ye-GaN edinga amandla. Izinsizakalo zethu zokukhiqiza nokuhlanganisa kusukela ekuqaleni kuze kube sekupheleni ziqinisekisa ama-PCB kagesi e-GaN athembekile, anwebekayo, futhi asebenza kahle kakhulu ezimbonini ezibalulekile emhlabeni jikelele.

Ukunciphisa I-Loop Inductance kuma-GaN Power PCBs

Ekwakhiweni kwe-PCB yamandla e-GaN, ngisho nama-nanohenries ambalwa we-inductance angabangela ukudutshulwa kwamandla kagesi ayingozi kanye nokulahlekelwa ukusebenza kahle. Ngokungafani nezakhiwo ezivamile ze-silicon lapho zamanje zigeleza zivundlile ebhodini, i-GaN idinga izindlela zamanje ezimfushane kakhulu, eziqondile ukuze igcine ukushintsha kuzinzile ngesivinini se-nanosecond.

I-Highleap Electronics Yehlisa Kanjani I-Inductance

Sisebenzisa amasu e-stackup athuthukisiwe nesakhiwo ukuze sifinyelele ukusebenza okuthembekile kumasistimu e-GaN:

• Isitaki se-PCB esilungiselelwe - Izindiza eziseduze nezindiza eziphansi ezihlukaniswe yi-dielectric encane yendawo ye-loop encishisiwe
• Ukuminyana okuphezulu ngama-array - 20+ nge-vias ebekwe ngqo ezindaweni zokuxhuma ukuze uthole ukugeleza kwamanje okuqondile
• Umzila osuselwe endizeni - Ukusebenzisa izindiza zethusi esikhundleni sokulandelela ukunciphisa ama-parasitic
• Ukubekwa kwengxenye okunembile - Abashayeli bamasango ngaphakathi kuka-5mm we-GaN FET nama-capacitor axhunywe ngokuqondile nama-vias

Kungani Kubalulekile

Lawa masu anciphisa i-loop inductance ibe ngaphansi kuka-2nH—kufika ku-10× ngaphansi kunemiklamo ye-PCB evamile.
Umphumela uwukusebenza okuzinzile kwe-high-frequency, ukunciphisa ukudubuleka, kanye nokusebenza kahle okuphelele okuphelele.
Eyethu efakazelwe amandla aphezulu okuminyana PCB ubuchwepheshe buqinisekisa ukuthi amasistimu asekelwe ku-GaN afinyelela ukusebenza okuphezulu ngaphandle kokubeka engcupheni ukwethembeka.

Izidingo Zokunemba KweDrayivu

Amasango e-GaN antekenteke—adlula i-7V futhi izisetshenziswa zihluleka unaphakade. Ngokungafani nama-silicon MOSFET abekezelela i-±20V, i-GaN idinga ukunemba okuphelele. Kodwa ukuletha i-voltage yesango enembile ngenkathi ushintsha amakhulu ama-volts kuma-nanosecond kunenselelo ngisho nabaklami abanolwazi.

Isixazululo: Ukuxhumana komthombo kaKelvin. Amandla wamanje ageleza endleleni eyodwa kuyilapho idrayivu yesango ibhekisela ekuxhumekeni okuhlukile okungaphethe wamanje. Lokhu kuqeda amaphutha we-voltage kusuka ku-inductance yendlela yamandla.

Ukumelana nesango kunquma ukuziphatha kokushintsha:

• Phansi kakhulu (<1Ω): I-oscillation elimazayo
• Iphezulu kakhulu (>10Ω): Ukulahlekelwa kokushintsha okudlulele
• Okufanelekile (2-5Ω): Ukusebenza okulinganiselwe

Sibeka izinqamuleli zesango ngqo kumadivayisi we-GaN, hhayi kubashayeli. Amaphakheji e-Surface-mount 0402 anciphisa i-parasitic inductance. Ilandelela umzila njengemigqa yokudlulisa ye-impedance elawulwayo. Le mininingwane inquma ukuthi i-GaN iyasifeza isithembiso sayo noma yehluleka ngendlela emangalisayo.

Ukuphathwa Okushisayo Kwamandla Agxilile

Ukusebenza kahle kwe-GaN kuyamangalisa—u-98% awujwayelekile. Kepha leyo 2% esele igxile ezindaweni ezincane zokufa. Isiguquli esingu-100W sihlakaza u-2W nje, kodwa i-thermal flux idlula u-100W/cm²—iphezulu kune-rocket nozzle.

Ama-traditional ashisayo awakwazi ukumelana nalokhu kuminyana. Sisebenzisa izixazululo eziphelele:

• Nge-in-pad arrays ngqo ngaphansi kwamadivayisi
• 0.2mm vias on 0.4mm honeycomb pitch
• Ukugcwaliswa kwe-Copper ukuze kube ne-conductivity ephezulu
• Ukuhlangana okuqondile kuma-heatsink noma amapuleti abandayo

Ngezinhlelo zokusebenza ezidlulele, izinhlamvu zemali zethusi ezishunyekiwe zinikeza izindlela zokumelana nokushisa ezishisayo. Lawa mabhuloki ethusi aqinile, ahlanganiswe ngesikhathi sokulanyiswa, ehlisa izinga lokushisa lenhlanganiso engu-20-30°C uma kuqhathaniswa nezinhlaka.

Ukuze uthole ibhodi lamandla le-GaN, qhathanisa amashidi edatha e-laminate kanye ne-dielectric, okuhlanganisa nokuqhuba ukushisa, ukujiya kwe-dielectric kanye nezidingo zokufaka ugesi. Ukuqhuba ukushisa kwe-substrate yensimbi akufanele kuphathwe njengokuqhuba ukushisa kwebhodi eligcwele ukufudumala. Buyekeza imikhuba ye-PCB yokuphathwa kokushisa ukuze uthole indlela ephelele yokushisa bese uqinisekisa amazinga okushisa ezingxenyeni ngaphansi kwezimo zomthwalo ohlosiwe kanye nokupholisa.

Izinto Ezisetshenziswa Kakhulu kanye Nokulawula kwe-EMI

Ekushintsheni kwama-megahertz amaningi, izinto ze-PCB zithinta ukusebenza kwesekethe. I-Fr-4's loss tangent (0.02) idala ukushisa okungaphezu kuka-1MHz. Izinto ezisezingeni eliphezulu zibaluleka.

Sisebenza njalo:

• i-laminate ekhethekile ephansi yokulahlekelwa (i-tangent yokulahlekelwa 0.0037)
• I-Isola I-Speed ​​(izindleko ezilinganiselwe/ukusebenza)
• Izinhlanganisela ze-PTFE (ukusebenza okuphezulu)

Kodwa izinto ezingavamile zokwandisa izindleko 3-5x. Izitaki ezihlanganisiwe zilungiselela ukusebenza kanye nezindleko—izinto ezisetshenziswayo ezinemvamisa ephezulu kuphela lapho kudingeka khona, i-FR-4 evamile kwenye indawo.

I-EMI iletha izinselelo eziyingqayizivele. Imiphetho esheshayo ye-GaN ikhiqiza amandla kusuka ku-DC kuya ku-1GHz. Ngaphandle komklamo ofanele, ukukhishwa kwegesi kudlula imikhawulo ngo-30dB. Sisebenzisa ukugcinwa kwemingcele eduze kwensimu ngokusebenzisa ama-node okushintsha ancishisiwe, ukuvikela indiza yomhlaba, kanye nokulawula izinga lomphetho lapho kwamukeleka khona. Lawa masu avela kokuhlangenwe nakho kwethu kwe-PCB yamandla okushintsha aqinisekisa ukuhambisana.

imibuzo ejwayelekile ukubuzwa

Q: Yini eyenza i-GaN ibe ngcono kune-silicon MOSFETs?
A: I-GaN ishintsha u-10x ngokushesha ngokulahleka okuphansi kakhulu, ivumela u-99%+ ukusebenza kahle kanye nokuminyana kwamandla okungu-3-5x. I-Highleap Electronics ithuthukisa izakhiwo ze-PCB ngamalophu wamandla angaphansi kwe-2nH, umzila olawulayo wokuvimba, nokuphathwa kokushisa okuthuthukisiwe ukuze kufezeke lezi zinzuzo.

Q: Yiziphi izinselelo ezinkulu ngomklamo we-GaN?
A: Izinselele eziyinhloko zifaka ukuncishiswa kwe-parasitic inductance, izidingo ezinembile zokushayela isango, ukugxilwa kwe-thermal, nokulawula kwe-EMI. I-Highleap Electronics ibhekana nalokhu ngokusebenzisa izitaki ezikhethekile, ngokusebenzisa ukulungiselelwa, umzila olawulwayo wokuvinjelwa, nokuhlola okuphelele.

Q: Ingabe imiklamo ekhona ye-silicon ingasebenzisa i-GaN ngokuqondile?
A: Akuvamile—I-GaN idinga ukuklanywa kabusha kwesakhiwo okuphelele. I-Highleap Electronics isiza ukuhlola imiklamo ekhona futhi ithuthukise izixazululo ze-GaN ezithuthukisiwe, ngokuvamile ezithola ukuncishiswa kosayizi ngo-50% kanye nokwenza ngcono ukusebenza kahle okungu-3-5% ngokusebenzisa kwethu. I-PCB yomshayeli we-LED isipiliyoni sokuthuthukisa.

Q: Yimaphi ama-switch frequencies angafinyelelwa yi-GaN?
A: I-GaN inika amandla ukusebenza okungu-100kHz kuya ku-10MHz+. I-Highleap Electronics ikhiqiza ama-PCB alungiselelwe lawa maza kusetshenziswa izinto ezilahleka kancane, i-impedance elawulwayo, kanye nama-parasitic amancane afakazelwe Ukushaja okungenantambo PCB izicelo.