LED Driver PCB Manufacturing for Commercial Lighting

Jwaloka k'hamphani e etsang tšebeletso e felletseng ea PCB, Highleap Electronics e fana ka tharollo ho liindasteri tse fapaneng tse kenyelletsang likoloi, likhokahano tsa mehala, lisebelisoa tsa matla, lisebelisoa tsa bongaka le lisebelisoa tsa elektroniki tsa bareki. Bokhoni ba rona bo akaretsa mefuta e mengata ea PCB-ho tloha ho liboto tse bonolo tsa lehlakore le le leng ho isa ho meralo e rarahaneng ea multilayer le HDI. Har'a tsena, li-PCB tsa mokhanni oa LED li emela e 'ngoe ea matla a rona a ikhethileng, moo melaoana e nepahetseng ea hajoale, taolo e tsoetseng pele ea mocheso, le ho latela ts'ireletso ka tieo ho leng bohlokoa. Ebang ke bakeng sa mabone a seterateng, mabone a likoloi, kapa lisebelisoa tsa temo, re fana ka li-PCB tsa bakhanni ba LED tse etselitsoeng ho tšepahala, ho sebetsa hantle le ts'ebetso ea nako e telele.

Hobaneng ha li-PCB tsa Mokhanni oa LED li hloleha le mokhoa oa ho li thibela

Sesosa se atileng haholo sa ho hloleha ha mokhanni oa LED PCB ha se feela ho phahama ha motlakase — ke ho bokella mocheso. Ka mohlala, mokhanni ea sebetsang sebakeng sa 85 ° C o lahleheloa ke halofo ea li-electrolytic capacitor nakong ea lilemo tse 2, athe yuniti e tšoanang ho 65 ° C e nka lilemo tse fetang 10. Phapang eo ea 20°C e hlalosa hore na sehlahiswa sa hao se tiile kapa se sekametse ditsekong tsa tiisetso.

Mocheso o tsepamisitse maikutlo libakeng tse ka lebelloang: Li-MOSFET li hlahisa 2-3W ka hare ho 1cm², li-transformer li eketsa 2W e 'ngoe ho pholletsa le 4cm², 'me li-rectifier li kenya letsoho ho fihla ho 2W. Ntle le moralo o nepahetseng oa mocheso oa PCB, li-hotspots tsena li theha likhahla tse fetang 50 ° C, li potlakisa ho roala ha likaroloana.

Maano a bohlokoa a ho ts'epahala ha mocheso:

• Ntlafatso ea likarolo: Ho arola mehloli ea mocheso ho tsoa likarolong tse bobebe ho sebelisoa litšitiso tsa mocheso
• Lintlafatso tsa lintho tse bonahalang: Lifofane tse boima tsa koporo (2-4oz) li hasa mocheso hantle ha tsela ea mocheso e fetisa mocheso ho ea holimo.
• Likarolo tsa boemo bo phahameng: Li-capacitor tsa polymer li eketsa bophelo ho fihlela ho 4x ha li bapisoa le li-electrolytics tsa aluminium

Bakeng sa maemo a matla a fetang 150W, li-PCB tsa aluminium-core li fana ka conductivity e ntle ea mocheso ka makhetlo a 10 ho feta FR-4. Ka mekhoa ena e kopantsoeng le boiphihlelo ba rona ba PCB bo nang le matla a mangata , re fihlella sekhahla sa ho hloleha ka tlase ho 0.5% ts'ebetsong ea tšimo ea lilemo tse 5.

Ho tseba EMI ho Bakhanni ba LED ba Maqhubu a Phahameng

Bakhanni ba kajeno ba LED ba fetoha ho tloha ho 65kHz ho ea ho 1MHz, ho hlahisa tšitiso e matla ea motlakase. Litlhophiso tse entsoeng hampe hangata li hloleha ho latela melao ka 20dB, e leng se lebisang ho ntlafatseng ho bitsa chelete e ngata.

Mohloli o ka sehloohong oa EMI ke node ea ho fetola, moo liphetoho tse potlakileng tsa dv/dt (hangata> 1000V/μs) li fetolelang mesaletsa ea koporo hore e be li-antenna. Millimeter e 'ngoe le e' ngoe e bohlokoa-ho atolosa mokhoa oa ho fetola node ho tloha ho 5mm ho ea ho 15mm ho ka eketsa mesi ka 10dB.

Mekhoa e metle ea ho laola EMI:

• Tsoela pele ho fetola li-node tse ka tlase ho bolelele ba 10mm kaofela
• Sebelisa litsela tse sephara, tse khutšoane ho e-na le litsela tse telele, tse tšesaane
• Beha li-snubber capacitor ka kotloloho sebakeng sa switching
• Lokisetsa litsela tse khutlang tsa maqhubu a phahameng ka kotloloho tlasa mats'oao a pele

Lisefe tsa EMI li hloka ho beoa hole le lipotoloho tse lerata. Karohano ea 'mele e netefatsa phallo e nepahetseng ea hona joale ka sefeneng ho fapana le ho e feta. Bakeng sa khatello ea mekhoa e tloaelehileng, Y-capacitors (2.2-4.7nF) e fana ka tekanyo ha e ntse e kopana le meeli ea ts'ireletso ea hona joale ea ho lutla.

Ka mekhoa ena e ntlafalitsoeng ka phihlelo ea rona ea PCB ea matla a ho fetola , Highleap e fana ka li-PCB tsa mokhanni oa LED tse lumellanang le EMI tse fetang liteko tsa pele ho latela melao kamehla.

Dimming Technologies le Control Integration

Lisebelisoa tsa morao-rao tsa LED li hloka mekhoa e fapaneng ea ho fifala. Taolo e bonolo ea ho tima ha e sa lekana - bakhanni ba tlameha ho ts'ehetsa li-interface tsa analog, digital, le waelese.

Ho Finyella ha Analoge ea 0-10V : Ho hloka ho itšehla thajana ka li-optocouplers tse lekantsoeng bakeng sa 3kV. Bothata: li-optocouplers lia thella ka mocheso. Tharollo: litšupiso tse nepahetseng le sebaka se arohaneng ka mocheso li boloka ho nepahala ha nako e ntse e ea.

Protokhole ea DALI : Taolo ea dijithale e hlokang 250Ω ± 10% ea impedance ea bese le tšireletso ea ho phahama ha motlakase. Re eketsa li-diode tsa TVS, li-resistor tse fokotsang motlakase, le karohano ea 277VAC bakeng sa polokeho. Ba kenyang hangata ba hokela mains ho li-terminal tsa DALI—lipotoloho tsa rona li pholoha tlhekefetso ena.

Ho Finyella ha PWM : E sebetsa ho tloha ho 100Hz-25kHz. Re ntlafatsa 500Hz-1kHz ho thibela ho fifala ha re ntse re laola EMI. Mahlakore a bohale a hloka mesaletsa e laoloang ea impedance e thibelang ho senyeha ha lets'oao.

Taolo e se nang mohala : Ho kopanngoa ha Bluetooth le Zigbee ho hloka moralo o hlokolosi oa RF. Re arola libaka tsa antenna 'me re sebelisa moralo oa maqhubu. Bokhoni ba rona ba PCB ba ho tjhaja ntle le mohala bo netefatsa puisano e tšepahalang ea waelese hammoho le lisebelisoa tsa motlakase.

Bokhoni bona ba ho kopanya bo etsa hore li-PCB tsa rona tse bohlale tsa LED li loketse lits'ebetso tsa mabone tsa khoebo, tsa indasteri le tsa IoT.

Phethahatso ea Tokiso ea Matla

Bakhanni ba LED ba khoebo ba tlameha ho boloka matla a matla ≥0.95 le THD <10%, a hlokang lipotoloho tse sebetsang tsa PFC. Sena ha se taba ea ho latela melao feela - matla a fokolang a eketsa litšenyehelo tsa ts'ebetso mme a hatella lisebelisoa tsa motlakase.

PFC ea mohato o le mong e fana ka litšenyehelo tse tlase le katleho ea 85-90%, e molemohali bakeng sa bakhanni ba bareki ba kopaneng. PFC ea mekhahlelo e 'meli e fihlela katleho ea 93-95%, e loketseng mabone a indasteri le a seterateng moo litšenyehelo tsa ts'ebetso li leng bohlokoa ho feta theko ea pele.

Melao ea bohlokoa ea sebopeho sa PFC:

• Kelvin o utloa bakeng sa tekanyo e nepahetseng ea hajoale
• Tsela e fapaneng ea mela ea kutlo hole le lerata
• Likarolo tse tsitsitseng mocheso (C0G capacitors, low-tempco resistors)
• Matšeliso a balaoli a ne a lula a le haufi ebile a se na lerata

Inductor ea boost e hlahisa masimo a bohlokoa a makenete. E behe hole le lipotoloho tse bonolo empa e le haufi le ho fetola li-FET ho fokotsa sebaka sa loop. Meralo ea rona ea PCB ea mojule oa motlakase e ntlafatsa litlhoko tsena tse qothisanang lehlokoa bakeng sa katleho e phahameng le ts'epo.

Lipotso Asked hangata

P: Ke eng e bakang mathata a ho thekesela ha mokhanni oa LED?
A: Lisosa tse tloaelehileng li kenyelletsa bokhoni bo sa lekaneng ba tlhahiso, ho se tsitse ha loop, kapa ho se lumellane ha dimmer. Highleap Electronics e rarolla sena ka meralo e ntlafalitsoeng ea PCB, marang-rang a mats'eliso a lokiselitsoeng hantle, le tlhahlobo e pharalletseng ea ho lumellana, e netefatsa ts'ebetso e sa thekeseleng libakeng tsohle tse fifalang.

Q: Ke nako efe e tloaelehileng ea bophelo ba li-PCB tsa mokhanni oa LED?
A: Bakhanni ba LED ba entsoeng hantle ba finyella lihora tse 50,000+ (lilemo tse 5-7 tse tsoelang pele). Highleap Electronics e netefatsa sena ka khetho ea likarolo tsa premium, moralo o matla oa mocheso o sebelisang koporo e boima le li-vias tsa mocheso, le tlhahlobo e felletseng ea ho chesoa e netefatsang ho ts'epahala ha nako e telele.

Q: Ke litifikeiti life tse hlokahalang bakeng sa bakhanni ba LED?
A: Litlhoko li fapana ho ea ka sebaka: UL 8750 (Amerika Leboea), ho tšoaea CE (Europe), CCC (Chaena). Liboto tsa meralo ea Highleap Electronics tse kopanang le litekanyetso tsohle tse nang le creepage/cleacle e nepahetseng, khetho ea likarolo tsa polokeho, le ho latela EMI. Re fana ka liteko tsa pele ho setifikeiti le tšehetso ea litokomane.

P: Mokhoa oa ho fokotsa boholo ba mokhanni oa LED ntle le tahlehelo ea ts'ebetso?
A: Phokotso ea boholo e hloka maqhubu a phahameng a ho fetoha, matla a khoheli a kopaneng, le ho beoa ha likarolo ka nepo. Highleap Electronics e sebelisa theknoloji ea HDI, likarolo tse kenyellelitsoeng, le mohlala oa mocheso o fihlelang ho fokotsa boholo ba 40% ha o ntse o boloka ts'epo ka rona. PCB ea ho tjhaja ka potlako haholo mekhoa ea miniaturization.

P: Na li-PCB tsa mokhanni oa LED li ka sebetsa maemong a feteletseng?
A: E, ka moralo o nepahetseng. Highleap Electronics e haha ​​​​bakhanni ba litekanyetso tsa -40 ° C ho ea ho +85 ° C ba sebelisa li-laminate tse phahameng tsa Tg, likarolo tsa mocheso o pharaletseng, le ho roala ka mokhoa o lumellanang. Ea rona EV e tjhaja PCB boiphihlelo bo netefatsa ts'ebetso e tšepahalang maemong a thata a kantle.