Liphoso Tse Bohlokoa ka Moralo oa Thermal oa LED le Mokhoa oa ho li Qoba

Hobaneng ha Moralo oa Thermal oa LED o Hlalosa Katleho kapa Ho hloleha

Theknoloji ea LED e fana ka bokhoni bo tsotehang, leha ho le joalo kutlo ea mocheso e ntse e le bofokoli ba eona bo boholo. Li-LED tsa sejoale-joale li hlahisa mocheso o moholo o bokellaneng libakeng tse nyane haholo, e leng se bakang phephetso ea mantlha bakeng sa moralo oa PCB oa taolo ea mocheso. Ha taolo ea mocheso e hloleha, liphello li hlaha ka potlako: ho senyeha ha leseli ka potlako, nako e khutsufalitsoeng ea ts'ebetso, le ho hloleha ho sa lebelloang ho tšepahala.

Lithempereichara tsa mateano tse fetang meeli ea moralo li baka ho senyeha ho hoholo ha phosphor. Ho fetoha ha mebala ho bonahala ka mor'a likhoeli, 'me palo ea ho hlōleha e eketseha haholo. Ho utloisisa liphoso tse tloaelehileng tsa moralo oa mocheso oa LED ho arola lihlahisoa tsa maemo a holimo ho tsoa ho ho hloleha pele ho nako.

Liphoso tse Tloaelehileng tsa Moqapi oa Mocheso oa LED

1. Ho nyenyefatsa bohlokoa ba litsela tsa mocheso

Baqapi ba bangata ba shebana feela le khetho ea sinki ea mocheso ha ba ntse ba shebile tsela e felletseng ea mocheso ho tloha mateanong a LED ho ea moeeng o teng. Tlhokomelo ena ea mantlha ea ho senya mocheso oa LED e baka mathata ao ho seng pholiso ea kantle e ka e hlolang. Khokahano e 'ngoe le e' ngoe ka har'a ketane ea ho hanyetsa mocheso e eketsa khanyetso e bokellanang ho tloha ho chip ho ea ho teba ea mocheso.

Tsela ea mocheso e kenyelletsa LED chip, die attach material, PCB layers copper, dielectric substrate, thermal interface material, le kopano ya sink ya mocheso. Ho ntlafatsa moralo oa tsela ea mocheso ho hloka tlhokomelo e hlophisitsoeng sebakeng se seng le se seng sa phetoho, haholo-holo PCB stack-up moo ho theoha ha mocheso oa bohlokoa ka ho fetisisa.

2. Tšebeliso ea lisebelisoa tse sa lokelang tsa substrate

Li-substrates tse tloaelehileng tsa FR-4 li theha mekoallo ea mocheso ka har'a meralo e matla ea LED. Ka conductivity ea mocheso e ka bang 0.3 W/mK, FR-4 e tšoasa mocheso haufi le mateano a LED. Ha matla a matla a feta 1W ka LED, mocheso oa mateano o feta ka potlako meeli e sireletsehileng, e leng se bakang ho fokotseha ho potlakileng.Metal-core PCB tharollo e fana ka ntlafatso e hlokahalang ea mocheso:

• Li-PCB tsa mantlha tsa aluminium - Fana ka 1-2 W/mK conductivity ea mocheso ka mekhahlelo e tloaelehileng ea dielectric, e loketseng lisebelisoa tse ngata tsa matla a bohareng.
• Litlhophiso tse tsoetseng pele tsa IMS - Fihla 3-5 W/mK ka lisebelisoa tse khethehileng tsa dielectric bakeng sa lihlopha tse phahameng tsa LED.
• Litharollo tsa koporo-konokono - Fana ka conductivity ea mocheso e fetang 200 W/mK ho lisebelisoa tsa motheo bakeng sa matla a matla a feteletseng.

Qeto ea thepa e tlameha ho leka-lekanya litlhoko tsa mocheso khahlanong le mathata a moruo le ho rarahana ha tlhahiso.

3. Moralo o sa nepahalang oa botenya ba koporo le lera la conductive la mocheso

Koporo e tloaelehileng ea 1 oz e fana ka mocheso o fokolang oa mocheso oa morao-rao, o lebisang khatello ea mocheso libakeng tse holimo tsa LED. Sena se baka mokhathala o kopaneng oa solder le li-gradients tsa mocheso tse potlakisang ho senyeha ha thepa.

Ho eketsa boima ba koporo ho 2-3 oz ho ntlafatsa haholo ho ata ha mocheso oa morao-rao, ho aba mocheso libakeng tse kholo tsa PCB. Mokhoa oa mahlale oa koporo o fetela ka nģ'ane ho sebaka sa LED, 'me o theha libaka tsa liphallelo tse fokotsang mocheso o phahameng ha o ntse o leka-lekanya litšenyehelo tsa tlhahiso.

4. Mocheso o sa lekaneng ka ho qaptjoa kapa ho beha sebaka se fosahetseng

Meralo e mengata e kenyelletsa li-vias tse fokolang tsa mocheso ka tlas'a liphutheloana tsa LED, ho nka hore sena se sebetsana le litlhoko tsa ho fetisa mocheso. Mokhoa ona o hloleha hobane ka katleho e itšetlehile ka bongata, bophara, boleng ba plating, le kabo ea sebaka. E sa lekaneng mogote vias moralo bopa bohlokoa mogote ho hanyetsa pakeng tsa le dikarolo koporo.

Moralo o sebetsang oa thermal vias o hloka moralo oa leano:

• Ka bophara Ho tloha ho 0.3mm ho isa ho 0.5mm, ho na le li-diameter tse nyane tse nolofalletsang ho beoa ha sekhahla se phahameng.
• Sebaka se loketseng - Beha litsi tsa 1.0-1.5mm ka har'a sebaka sa mocheso oa mocheso, o fetela hanyane ho feta sebaka sa maoto sa LED.
• Ka ho tlatsa - Ho tlatsa epoxy ka mocheso ho fokotsa ho hanyetsa mocheso ka 30-50% ha ho bapisoa le li-vias tse tletseng moea.
• Ka density - Cheka 15-25 vias per square centimeter libakeng tse bohlokoa tsa mocheso bakeng sa lisebelisoa tse matla a phahameng.

5. Ho hlokomoloha khetho le ho kenya lisebelisoa tsa mocheso oa mocheso (TIM)

Khetho e fosahetseng ea lisebelisoa tsa mocheso oa mocheso e baka mekoallo e ke keng ea hlōloa pakeng tsa PCB le siling ea mocheso. Li-pads tse theko e tlaase tsa mocheso tse nang le conductivity ka tlase ho 2 W / mK hammoho le khatello e sa lekaneng e ntseng e phahama li siea likheo tsa moea tse eketsang ka mokhoa o tsotehang ho hanyetsa mocheso.Likhetho tse phahameng tsa ts'ebetso e 'ngoe le e' ngoe e fana ka melemo e fapaneng:

• Mafura a futhumetseng - Fana ka 3-5 W/mK conductivity e nang le botenya bo fokolang ba bond-line ha e sebelisoa hantle.
• Lisebelisoa tsa phetoho ea mohato - Fana ka ts'ebetso e tsitsitseng ho potoloha mocheso ntle le mathata a ho ntša metsi.
• Lisebelisoa tse thehiloeng ho graphite - Kopanya conductivity e phahameng ka boiketlo ba ho kopanya, leha e le ka litšenyehelo tsa pele.

Khetho e tlameha ho nahana ka conductivity ea mocheso, botsitso ba nako e telele, ho lumellana ha kopano, le litlhoko tsa ho sebetsa hape.

6. Ho hloka ketsiso ea mocheso le netefatso ea liteko

Ho itšetleha feela ka boiphihlelo ba nako e fetileng ntle le ho etsa mohlala oa mocheso ho pepesa meralo kotsing e kholo. Moloko o mong le o mong oa LED o fana ka khanya e phahameng ea lumen e nang le litšobotsi tse fetotsoeng tsa mocheso. Litharollo tsa nakong e fetileng li ka hloleha ka mokhoa o makatsang ka li-LED tse ncha tse lebisang matla a mangata libakeng tse nyane.

Ketsiso ea mocheso e supa mathata a ka bang teng a mocheso oa PCB pele o sebelisa lisebelisoa tse turang. Le tlhahlobo ea mantlha e lekanyelitsoeng e senola libaka tse chesang, e tiisa mekhoa ea ho pholisa, le ho lekanya moeli khahlano le meeli ea mocheso. Netefatso ea post-prototype e sebelisang infrared thermal imaging e netefatsa ho nepahala ha papiso le ho pepesa mefuta e fapaneng ea tlhahiso.

Mekhoa e Molemohali ea ho Ntlafatsa Moralo oa Thermal oa LED

Moralo oa profeshenale oa mocheso o qala nakong ea nts'etsopele ea mohopolo ho fapana le nakong ea ho rarolla mathata. Khetho ea thepa e theha motheo oa mocheso, o nang le khetho ea substrate e tsamaisoang ke lipalo tsa matla a matla le lithempereichara tsa matekoane.

Likarolo tsa bohlokoa tsa moralo li fana ka lintlha tsa ho qala:

• Boima ba koporo - Bonyane 2 oz bakeng sa lits'ebetso tsa matla a holimo tse nang le litlhoko tsa ho hasana ka mocheso.
• Thermal ka density - 15-25 vias per square centimeter libakeng tse mahlonoko ka tlas'a liphahlo tse futhumatsang tsa LED.
• Lisebelisoa tsa sefahleho - Conductivity e fetang 3 W/mK bakeng sa khokahanyo e sebetsang ea sink ea mocheso.
• Netefatso ya pele - Tlhahlobo ea mocheso pele ho boitlamo ba moralo, e lateloa ke netefatso ea tlhahlobo ea mohlala.

Ho kenya ts'ebetsong litataiso tsena esale pele ho fokotsa lipotoloho tsa ntlafatso, ho netefatsa mocheso o tsitsitseng oa mateano, le ho lelefatsa bophelo ba LED. Bakeng sa merero e hlokang papiso e tebileng ea mocheso, tlhahlobo ea moralo, kapa tšehetso ea khetho ea thepa, sehlopha sa rona sa boenjiniere se fana ka boeletsi ba taolo ea mocheso oa LED PCB ho potlakisa katleho ea sehlahisoa sa hau.

Ho sebelisana le Highleap: Ho Qoba Liphoso tse Tloaelehileng tsa Moralo oa Thermal LED

Phallo e sebetsang ea mocheso oa LED e hloka kutloisiso ea hore taolo ea mocheso e fetela ka nģ'ane ho khetho ea likarolo ho boenjiniere ba boemo ba tsamaiso. Liphoso tse tloaelehileng tsa moralo oa mocheso oa LED hangata li hlaha ka lebaka la ho nolofatsa ho rarahana hona ka khetho e sa nepahalang ea thepa, ho se hasane hoa mocheso, ho se lekane ka ts'ebetsong, kapa taolo e mpe ea sebopeho.

Katleho e hloka ho kopanya lisebelisoa tse nepahetseng le geometry e ntlafalitsoeng, e netefalitsoeng ka papiso le ho netefatsoa ka liteko. Mokhoa ona o hlophisitsoeng o fetola moralo oa PCB oa taolo ea mocheso ho tloha mathateng a iphetang ho ba lits'ebetso tse laoloang tsa boenjiniere tse fanang ka ts'ebetso e tšepahalang.

Ho Highleap Electronics, sehlopha sa rona sa boenjiniere se ikhethile ka ho ntlafatsa moralo oa mocheso bakeng sa lits'ebetso tse hlokang tlhokomelo ea LED. Re fana ka tlhahlobo e felletseng ea mocheso, tataiso ea khetho ea thepa, le lits'ebeletso tsa tlhahlobo ea moralo ho netefatsa hore meralo ea hau ea LED PCB e fihlela lipheo tsa ts'ebetso le ts'epo. Ikopanye le rona ho buisana ka hore na boiphihlelo ba rona bo ka ntlafatsa ts'ebetso ea mocheso oa LED PCB joang morerong oa hau o latelang.