Mokhoa oa ho Rala PCB ea Matla a Phahameng a Matla U Sebelisa Metal Core Board

Selelekela: Hobaneng ha Lebone la LED le Batla li-PCB tsa Metal Core

Li-LED tse nang le matla a phahameng li tobane le liphephetso tse matla tsa taolo ea mocheso tse amang khanya le nako ea bophelo ea tsona ka kotloloho. Ha mocheso oa mateano o feta 150 ° C, katleho ea LED e ka theoha ka ho feta 70%, e leng ho etsang hore ho be le mocheso o sebetsang hantle oa bohlokoa bakeng sa ts'ebetso e tsitsitseng ea optical.

Metal Core PCBs bakeng sa mabone a LED a fana ka tharollo e netefalitsoeng ka ho tsamaisa mocheso hantle hole le mateano a LED. Ho fapana le mapolanka a tloaelehileng a FR4 a nang le 0.3 W / mK feela ea mocheso oa mocheso, aluminium kapa li-MCPCB tsa koporo li fana ka litekanyetso pakeng tsa 1.0 le 8.0 W / mK, ho netefatsa ho fetisoa ha mocheso ka potlako le ho tšepahala ho ntlafetseng.

Ts'ebetso ena e phahameng ea mocheso e lumella lisebelisoa tsa LED ho boloka khanya e tsitsitseng le botsitso ba mebala tlas'a ts'ebetso ea matla a phahameng. Kajeno, li-MCPCB li sebelisoa haholo ho mabone a likoloi, kotopo le mabone a indasteri, le libakeng tse ling tse boima moo ts'epo ea nako e telele e leng bohlokoa.

Ha bongata ba matla a LED bo ntse bo eketseha—haholo-holo meralong ya COB (Chip-on-Board) e hlahisang phallo ya mocheso e fetang 50 W/cm²—ho sebedisa di-PCB tsa Metal Core ho fetohile ntho ya bohlokwa bakeng sa ho fihlella dithempereichara tse bolokehileng tsa tshebetso le ho atolosa nako ya tshebetso ya sistimi.

Metheo ea Mocheso le Motlakase oa Metal Core PCBs bakeng sa Leseli la LED

Ho utloisisa Tsela ea Thermal

1. Sebopeho sa Phallo ea Mocheso

Ho Metal Core PCBs bakeng sa mabone a LED, mocheso o tsamaea ho tloha mateanong a LED ho pholletsa le likarolo tse 'maloa ho ea tebang ea mocheso. Tsela e kenyelletsa lenonyeletso la solder, lera la potoloho ea koporo, insulation ea dielectric, 'me qetellong karolo ea motheo ea tšepe. Lera le leng le le leng le fana ka karolo ea kakaretso ea ho hanyetsa mocheso (Rth), e hlalosang katleho ea ho pholisa ka kakaretso.

2. Karolo ea Lera la Dielectric

Lera la dielectric ke karolo ea bohlokoa ka ho fetisisa ea moralo oa tšepe oa LED oa PCB hobane e tlameha ho koala motlakase ha e ntse e lumella mocheso ho phalla hantle. Lisebelisoa tse tsoetseng pele joalo ka li-polymers tse tlatsitsoeng ka ceramic-kapa aluminium oxide li fana ka conductivity ea mocheso ho tloha ho 1.5 ho isa ho 4.0 W/mK. Botenya ba eona bo ama ka kotloloho phetisetso ea mocheso le motlakase oa ho senyeha, ho etsa hore ntlafatso e nepahetseng e be ea bohlokoa bakeng sa lits'ebetso tse fapaneng tsa LED.

Ho leka-lekanya Ts'ebetso ea Thermal le Motlakase

1. Ts'ebeliso ea Botenya ba Dielectric

Likarolo tse tšesaane tsa dielectric li matlafatsa conductivity ea mocheso empa li fokotsa ho itšehla thajana ha motlakase, ha likarolo tse teteaneng li eketsa matla a ho kenya letsoho ka theko ea phallo ea mocheso. Bakeng sa likopano tsa PCB tsa matla a tlase a matla a tlase a 60 V, 50–75 µm dielectric layers hangata li fana ka tekanyo e ntle ka ho fetisisa. Meralo ea matla a phahameng hangata e hloka 100–150 µm bakeng sa likarolo tse lekaneng tsa polokeho.

2. Khetho ea Koporo le Metal Base

Lera la potoloho ea koporo le boetse le ama bokhoni ba hona joale le ho ata ha mocheso. Koporo e tloaelehileng ea 1-2 oz e lekane bakeng sa meralo e mengata ea mabone a LED, e netefatsang ts'ebetso e tsitsitseng ea motlakase le kabo ea mocheso oa lateral. Setsi sa tšepe-ka tloaelo 1.0-2.0 mm aluminium-e sebetsa e le mochine o ka sehloohong oa mocheso, o aba mocheso oa sebaka sebakeng se seholo pele o o fetisetsa meahong e pholileng e ka ntle.

Khetho ea Boitsebiso bakeng sa Li-PCB tsa Metal Core tsa Matla a Phahameng bakeng sa Leseli la LED

Metal Base Substrate Options

1. Aluminium e le Khetho e Tloaelehileng

Aluminium e ntse e le karolo e ka sehloohong ea li-PCB tsa Metal Core bakeng sa mabone a LED ka lebaka la ho leka-lekana ha eona hantle ha mocheso oa motlakase (120-200 W / mK), boima bo tlaase, le ho khoneha. AL5052 alloy e sebelisoa hangata lits'ebetsong tsa LED bakeng sa botsitso ba eona ba mochini le ho hanyetsa kutu, ho etsa hore e tšoanelehe bakeng sa libaka tse ngata tsa mabone.

2. Koporo bakeng sa Ts'ebetso e Feteletseng ea Thermal

Ha mocheso o phahameng oa mocheso o hlokahala, metheo ea koporo e fana ka conductivity e phahameng ea mocheso oa 380-400 W / mK. Leha ho le joalo, litšenyehelo tsa bona tse phahameng le boima ba 'mele li li etsa hore li tšoanelehe haholo bakeng sa lisebelisoa tse phahameng tsa LED PCB tse kang mabone a likoloi le lisebelisoa tsa indasteri tse nang le mocheso o ka holimo ho 40 W/cm². Lisebelisoa tse akaretsang tsa mabone hangata li fihlella ts'ebetso e lekaneng ka li-substrates tsa aluminium.

Dielectric Layer Engineering

1. Karolo ea Mocheso le Motlakase

Lera la dielectric le bopa molala wa bohlokwa wa mocheso moralong wa PCB ya tshepe ya LED, kaha le tlameha ho fana ka ho thibela motlakase le ho tsamaisa mocheso ka katleho. Disebediswa tse tswetseng pele tse nang le aluminium oxide kapa boron nitride fillers di fihla ho 3.0–4.0 W/mK ha di ntse di boloka matla a dielectric ho feta 3000 V. Dielectric tse tlwaelehileng tse thehilweng ho epoxy tse nang le 1.5–2.0 W/mK di fihlela ditlhoko tsa ditsamaiso tse ngata tsa mabone a kgwebo.

2. Tšepahala le Ntlafatso

Lisebelisoa tsa dielectric li lokela ho mamella libaesekele tse futhumatsang le ho bapisa CTE ea likarolo tse haufi. Mocheso oa phetoho ea khalase o ka holimo ho 150 ° C o khothaletsoa bakeng sa ts'ebetso ea LED ea matla a phahameng. Ntlafatso ea botenya e lula e le bohlokoa - likarolo tse tšesaane li theola khanyetso ea mocheso, ha tse teteaneng li ntlafatsa ho itšehla thajana. Tekanyo e nepahetseng e itšetlehile ka boemo ba matla a LED le tikoloho ea ts'ebetso.

Khetho ea Qetello ea Bokaholimo bakeng sa Lisebelisoa tsa LED

1. ENIG bakeng sa Kopano ea Precision

ENIG (Electroless Nickel Immersion Gold) e fana ka thekiso e ntle haholo le khanyetso ea oxidation, e e etsa hore e be e loketseng bakeng sa aluminium PCB bakeng sa li-module tsa LED tse hlokang kopano e hlakileng kapa ea mehato e mengata.

2. Mekhoa e meng ea OSP le HASL

OSP (Organic Solderability Preservative) e fana ka qetello e theko e tlaase bakeng sa tlhahiso ea boleng bo phahameng e nang le bophelo bo khuts'oane ba ho boloka, ha HASL (Hot Air Solder Leveling) e tiisa manonyeletso a matla a solder tlas'a maemo a pheta-phetoang a libaesekele tsa mocheso.

Mehopolo ea Moralo bakeng sa Metal Core PCBs bakeng sa Lebone la LED

Ho ntlafatsa ho beoa ha LED le Kabo ea Mocheso

Leano la ho beha LED le ama ka matla ho felloa ke mocheso le ho ts'epahala ho Metal Core PCBs bakeng sa mabone a LED. Esita le sebaka sa sebaka se thibelang libaka tsa mocheso le ho netefatsa tlhahiso e tsitsitseng ea khanya.

• Sekhahla sa LED se tšoanang - Boloka limilimithara tse 8-10 lipakeng tsa lihlopha tsa LED ho qoba ho kopana ha libaka tsa mocheso.
• Sebopeho se tsitsitseng bakeng sa lihlopha - Maemo a mang a LED hammoho le li-module tsa mela bakeng sa kabo ea mocheso.
• Ketsiso ya mocheso - Sebelisa tlhahlobo e felletseng ea lintlha ho bolela esale pele libaka tse chesang le ho ntlafatsa sebaka kapa lipaterone tsa koporo pele u etsa prototyping.
• Sepheo sa mocheso - Boloka li-junctions tsa LED ka tlase ho 120 ° C bakeng sa ts'ebetso e ntle e khanyang le nako ea bophelo ka meralo e matla ea LED PCB.

Moqapi oa Copper Trace le Thermal Pad

Ka moralo oa PCB oa tšepe oa LED, lipaterone tsa koporo li laola phallo ea hajoale le ho ata ha mocheso oa morao-rao. Khetho e nepahetseng ea geometry le boima ba koporo e ama ts'ebetso haholo.

• Mesaletsa e pharaletseng ea koporo - Atolosa mesaletsa e haufi le liphaephe tsa LED ho ntlafatsa ho hasana ha mocheso oa lehae.
• Lihlekehleke tsa koporo tse tiileng - Sebelisa lipampitšana tsa ho ikopanya ka kotloloho bakeng sa liphutheloana tsa COB ho holisa tsamaiso ea mocheso.
• Boima ba koporo bo ntlafalitsoeng - 2 oz koporo e ntlafatsa bokhoni ba hona joale le ho hasana ha mocheso, le hoja ka litšenyehelo tse phahameng.
• Moralo oa bophara ba ho latela - Bakeng sa litsela tsa motlakase, boloka bonyane bophara ba 0.4-0.6 mm ho sebetsana ka mokhoa o sireletsehileng meroalo ea hona joale.

Thermal Via Integration

Leha boholo ba li-PCB tsa Metal Core bakeng sa mabone a LED li sebelisa kaho ea lera le le leng, ho kopanya li-vias tsa mocheso ho ka ntlafatsa ho qhalana ha mocheso sebakeng seo.

• Mocheso o otlolohileng - Thermal vias tlatsitsoe ka conductive epoxy kapa koporo plating sebetsa e le likanale mocheso ka lera dielectric.
• Pholiso e lebisitsoeng - Sebelisa ka tlas'a li-LED tsa li-chip tse ngata kapa likarolo tsa motlakase moo mocheso o fetang matla a ho qhalana.

Mehopolo ea Tšireletso ea Motlakase

Tlhokomelo e nepahetseng ea motlakase e netefatsa polokeho le ts'epahalo likopanong tse matla tsa LED PCB, haholo tse sebetsang ka matla a phahameng.

• E lekane ho phatloha le ho hlaka - Boloka limilimithara tse 3-4 pakeng tsa li-circuits tse phahameng le tsa LED bakeng sa lisebelisoa tsa 220 V AC.
• Solder mask insulation - Sebelisa maske a solder holim'a koporo e pepesitsoeng ho thibela borokho le ho ntlafatsa ho itšehla thajana ha motlakase.
• Ho lumellana le litekanyetso tsa polokeho - Netefatsa melao ea sebaka ho latela sehlopha sa motlakase le maemo a tikoloho.

Prototyping le Testing Metal Core PCBs bakeng sa Ts'ebetso ea Lebone la LED

Tlhahlobo ea Mocheso le Mekhoa ea ho Tiisa

1. Infrared Thermography le Hot Spot Detection

Netefatso ea mocheso e bohlokoa ho netefatsa katleho ea Metal Core PCBs bakeng sa mabone a LED pele ho tlhahiso ea bongata. Infrared thermography e bonts'a kabo ea mocheso ho pholletsa le boto, e supa libaka tse chesang, likhahla tsa mocheso, le katleho e akaretsang ea ho hasa mocheso.

2. Operating Condition Simulation

Teko e lokela ho ikamahanya le maemo a 'nete-ho khanna hona joale, mocheso oa tikoloho, le tlhophiso e ntseng e eketseha - ho netefatsa bonnete. Likh'amera tsa boemo bo holimo (0.1°C) li thusa ho hlokomela mocheso oa mateano a LED ka nepo.

3. Thermal Resistance Measurement

The junction-to-board thermal resistance (Rjb) e lekanya ts'ebetso ea ho fetisa mocheso 'me hangata e lekanyetsoa ka ho hokahanya ha mocheso le mocheso oa pele. Bakeng sa meralo ea PCB ea matla a phahameng, boleng ba Rjb bo ka tlase ho 5 ° C/W bo nepahetse, leha meeli e ikhethileng e fapana ka matla a LED le merero ea moralo oa mocheso.

Tšepahala Testing Protocols

1. Thermal Cycling le Mechanical Mokhathala

Lithuto tsa tlhahlobo ea ts'epo ea tšepe ea LED ea PCB ea libaesekele tse futhumetseng lipakeng tsa -40 ° C le 125 ° C bakeng sa lipotoloho tse 500-1000, tse etsisang lilemo tsa ts'ebeletso. Botšepehi bo kopanetsoeng ba solder ke ntho e ka sehloohong e amehang ka lebaka la katoloso e sa lumellaneng ea mocheso har'a liphutheloana tsa LED, koporo le likaroloana tsa aluminium.

2. Ho hloleha Mokhoa Analysis

Karohano ka mor'a ho palama baesekele e futhumatsang e senola mefokolo e ka bang teng joalo ka:

• Dielectric delamination - karohano pakeng tsa ho kenya letsoho le likarolo tsa tšepe e fokotsa mocheso oa mocheso.
• Ho petsoha ha lenonyeletso - khatello ea maikutlo ea ho atolosa khafetsa e lebisa mokhathala oa mechine.
• Ho phahamisa trace ea koporo - ho khomarela ho fokolang ho sitisa litsela tsa motlakase le tsa mocheso.

Liteko tsa libaesekele tsa matla, ho bulela le ho tima li-LED khafetsa, ho tiisa matla a mocheso.

Benchmarking ea Ts'ebetso

1. Tekolo ea Mocheso le Sephetho

Teko ea ho qetela e tiisa hore mocheso oa khokahanyo ea LED o lula o le ka tlase ho 120°C tlas'a matla a lekantsoeng. Lintlha tse tsitsitseng tsa ho phahama ha mocheso li tiisa hore moralo oa Metal Core PCB o fihlela lipheo tsa taolo ea mocheso.

2. Ho chesoa le Ketsiso Correlation

Teko e atolositsoeng ea ho chesoa e hlokomela ho senyeha ha leseli e le sesupo sa katleho ea taolo ea mocheso. Liphetho tsa ketsiso li lokela ho lumellana ka hare ho 10-15% ea litekanyetso tse lekantsoeng; liphapang tse kholo li fana ka maikutlo a ho etsa mohlala kapa ho se lumellane ha tlhahiso ho hlokang ho lokisoa pele ho tlhahiso ea tlhahiso.

Ho Fumana Ts'ebetso e Tšepahalang ea LED ka Optimized Metal Core PCBs

Mokhoa o Kopantsoeng oa Moqapi oa Thermal

Metal Core PCBs bakeng sa mabone a LED a bohlokoa bakeng sa ho sebetsana le litlhoko tsa mocheso oa lisebelisoa tsa mabone a matla a phahameng. Ho finyella ho tšepahala ho hloka mokhoa o akaretsang oa moralo o kopanyang ketsiso ea mocheso, khetho ea thepa, ts'ebetso ea motlakase, le ho etsa lintho. Ho sebetsa hantle ha tsela ea mocheso-ho tloha ka lehlakoreng la LED ho pholletsa le lera la dielectric ho ea motheong oa tšepe-ho lekanyetsa ka ho toba botsitso ba tsamaiso le nako ea bophelo.

Melao-motheo ea Moralo oa Motheo

Litsi tsa moralo tse sebetsang tsa LED MCPCB holim'a melao-motheo e mengata ea bohlokoa:

• Tsela e khuts'oane ea mocheso - Ho tsamaisa mocheso o tobileng ho tloha ho LED ho ea setsing sa tšepe ho fokotsa mocheso oa matekoane le ho ntlafatsa katleho e khanyang.
• Kabo e tšoanang ea mocheso - Ho beoa ha LED ho leka-lekaneng le geometry ea koporo e ntlafalitsoeng e thibela libaka tse chesang tsa lehae le ho lelefatsa bophelo ba ts'ebeletso.
• Ntlafatso ea lintho tse bonahalang - Dielectric e nepahetseng, setsi sa tšepe, le khetho ea ho qetela ea holim'a metsi e netefatsa ts'ebetso e tšepahalang ea mocheso le motlakase.

Li-substrates tsa aluminium tse nang le likarolo tsa dielectric tse sebetsang hantle ka mocheso li kopana le litlhoko tse ngata tsa LED, ha metheo ea koporo e ts'ehetsa lits'ebetso tsa matla a matla a feteletseng.

Ho netefatsa Boleng ba Tlhahiso le netefatso

Ho nepahala ha tlhahiso ho ama haholo ts'ebetso ea mocheso. Ho sebelisana 'moho le baetsi ba MCPCB ba nang le boiphihlelo ho netefatsa tlamahano e tsitsitseng ea lera, ho khomarela koporo, le boleng ba kalafo bo holimo. Netefatso ea prototype-ka tekanyo ea ho hanyetsa mocheso, liteko tsa ho palama libaesekele, le tlhahlobo ea matla-e netefatsa botšepehi ba moralo pele ho tlhahiso ea bongata, ho fokotsa likotsi tsa ho hlōleha.

Partnering for Thermal Excellence

Ho Highleap Electronics, re ikhethile ka ho hlahisa li-PCB tsa Metal Core tse sebetsang hantle bakeng sa lits'ebetso tsa mabone a LED. Sehlopha sa rona sa boenjiniere se fana ka lipuisano tsa moralo, ketsiso ea mocheso, le tlhahiso ea li-prototype ho thusa bareki ho fihlela taolo e phahameng ea mocheso le ts'epo ea LED ea nako e telele. Ikopanye le rona ho buisana ka litlhoko tsa hau tsa LED MCPCB le ho fihlella boiphihlelo ba rona bo tsoetseng pele ba taolo ea mocheso.