Kukanganisa Kwakakura mu LED Thermal Dhizaini uye Maitiro eKuzvidzivirira

Nei LED Thermal Dhizaini Inotaridza Kubudirira kana Kukundikana

Tekinoroji ye LED inoita kuti ishande zvakanaka zvinoshamisa, asi kunzwa kwekupisa kunoramba kuri dambudziko guru. Ma LED emazuva ano anogadzira kupisa kwakanyanya munzvimbo diki, zvichikonzera dambudziko guru pakugadzirwa kwePCB yekutarisira kupisa. Kana kudzora kupisa kukakundikana, mhedzisiro yacho inokurumidza kukurumidza: kuora kwechiedza, hupenyu hupfupi hwekushanda, uye kutadza kuvimbika kusingatarisirwi.

Junction tembiricha inodarika dhizaini inotemesa inokonzeresa exponential phosphor kudzikira. Kuchinja kwemavara kunova kuoneka mukati memwedzi, uye kukundikana kunowedzera zvakanyanya. Kunzwisisa zvakajairika LED thermal dhizaini zvikanganiso zvinopatsanura zvigadzirwa zvehunyanzvi-giredhi kubva mukutadza nguva isati yakwana.

Yakajairika LED Thermal Dhizaini Zvikanganiso

1. Kuderedza kukosha kwenzira dzinopisa

Vazhinji vagadziri vanotarisa zvakanyanya pakusarudza singi yekupisa uku vachitarisa iyo yakazara nzira yekupisa kubva pajunction ye LED kuenda kumhepo yakadzika. Ichi chakakosha che LED kupisa dissipation tarisiro inogadzira mabhodhoro ayo pasina kutonhora kwekunze kunogona kukunda. Yese interface mu thermal resistance chain inowedzera kuramba kunoungana kubva chip kusvika pakupisa kunyura.

Iyo nzira yekupisa inosanganisira LED chip, die attach material, PCB copper layers, dielectric substrate, thermal interface material, uye heat sink assembly. Kugadzirisa dhizaini yekupisa kunoda kutarisisa kune yega shanduko nzvimbo, kunyanya iyo PCB stack-up uko kunonyanya kukosha kudonha kunoitika.

2. Kushandiswa kwezvinhu zvisina kufanira substrate

Yakajairika FR-4 substrates inogadzira zvipingamupinyi zvinopisa mune yakakwirira-simba LED madhizaini. Iine thermal conductivity yakatenderedza 0.3 W/mK, FR-4 inoteya kupisa pedyo ne LED junctions. Kana simba remagetsi richipfuura 1W pa LED, tembiricha yekusangana inokurumidza kudarika miganho yakachengeteka, zvichikonzera kukurumidza kudzikisira.Metal-core PCB mhinduro dzinopa inodiwa yekuvandudza kwemafuta:

• Aluminium musimboti PCBs -Nyoresa 1-2 W/mK yekupisa yekupisa kuburikidza neakajairwa dielectric layer, akakodzera mazhinji epakati-simba maapplication.
• Advanced IMS zvigadziriso - Svika 3-5 W/mK ine nyanzvi dielectric zvinhu zveakakwira-simba LED arrays.
• Copper-core mhinduro -Ipa thermal conductivity inopfuura 200 W/mK mune base zvinhu zvekunyanyisa simba densities.

Sarudzo yezvinhu inofanirwa kuenzanisa zvinodikanwa zvekupisa zvichipesana nezvinonetsa zvehupfumi uye kuoma kwekugadzira.

3. Magadzirirwo asina kunaka emhangura ukobvu uye thermal conductive layer

Yakajairwa 1 oz mhangura inopa kushoma lateral kupisa kupararira, kuisa pfungwa yekupisa kushushikana pa LED inokwira mapoinzi. Izvi zvinokonzera solder joint kuneta uye tembiricha gradients kuti mhanyisa zvinhu kuparara.

Kuwedzera huremu hwemhangura kusvika 2-3 oz inovandudza zvakanyanya lateral thermal kupararira, kugovera kupisa munzvimbo dzakakura dzePCB. Strategic copper patterning inoenderera mberi kweiyo LED tsoka, ichigadzira nzvimbo dzekuyamura dzinoderedza tembiricha yepamusoro uchienzanisa mutengo wekugadzira.

4. Kupisa kusina kukwana kuburikidza nekugadzira kana kuiswa kusina kunaka

Mazhinji madhizaini anosanganisira mashoma ekudziya vias akananga pasi pemapakeji eLED, achifungidzira kuti izvi zvinogadzirisa zvinodikanwa zvekupisa kupisa. Iyi nzira inokundikana nekuti kuburikidza nekubudirira kunoenderana nekuwanda, dhayamita, kunaka kweplating, uye kugovera kwenzvimbo. Kusakwana thermal vias dhizaini inogadzira yakakosha kupisa kwekudzivirira pakati pemhangura akaturikidzana.

Inoshanda thermal vias dhizaini inoda hurongwa hwekuronga:

• Via dhayamita - Range kubva 0.3mm kusvika 0.5mm, ane madhayamita madiki anogonesa kuiswa kwepamusoro density.
• Optimal spacing -Isai vias pa 1.0-1.5mm nzvimbo mukati meiyo inopisa pad nzvimbo, ichiwedzera zvishoma kupfuura iyo LED tsoka.
• Kuburikidza nekuzadza - Thermally conductive epoxy filling inoderedza kupisa kwemafuta ne30-50% kana ichienzaniswa neazadzwa nemhepo.
• Via density - Target 15-25 vias per square centimita munzvimbo dzakakosha dzekupisa dzekushandisa-simba repamusoro.

5. Kuregeredza kusarudzwa uye kuiswa kweiyo thermal interface zvinhu (TIM)

Kusarudzika kwemafuta ekupisa kusarudzwa kwezvinhu kunogadzira zvipingamupinyi zvisingakundiki pakati pePCB uye singi yekupisa. Yakaderera-inodhura thermal pads ine conductivity iri pazasi 2 W/mK yakasanganiswa nekusakwana kukwira kumanikidza kusiya mapeji emhepo anowedzera zvakanyanya kupikisa kupisa.Kusarudzwa kwepamusoro-kwekuita chimwe nechimwe chinopa zvakanakira zvakasiyana:

• Mafuta anopisa -Ipa 3-5 W/mK conductivity ine kushoma bond-line ukobvu kana yashandiswa nemazvo.
• Phase-kuchinja zvinhu -Ipa kuita kunoenderana kutenderera kwetembiricha pasina kupomba-kunze kunetseka.
• Graphite-based pads - Batanidza yakakwira conductivity nekureruka kwekusangana, kunyangwe pamutengo weprimiyamu.

Sarudzo inofanirwa kufunga nezvekupisa kwekushisa, kugadzikana kwenguva refu, kuenderana kwegungano, uye rework zvinodiwa.

6. Kushaikwa kwekufananidza kwekupisa uye kuongororwa kwebvunzo

Kuvimba chete neruzivo rwekare pasina kupisa modhi inofumura dhizaini kune njodzi huru. Chizvarwa chega chega che LED chinopa yakakwira lumen density ine yakachinjika yekupisa maitiro. Mhinduro dzakapfuura dzinogona kukundikana zvakaipisisa nema LED matsva anoisa simba rakawanda munzvimbo diki.

Thermal simulation inotaridza zvingangoitika PCB kupisa nyaya usati wazvipira kune inodhura turusi. Kunyangwe ekutanga magumo ekuongorora anoratidza nzvimbo dzinopisa, inosimbisa nzira dzekutonhora, uye inoverengera muganho uchipokana neanopisa. Post-prototype kusimbiswa uchishandisa infrared thermal imaging inosimbisa simulation iko uye inofumura misiyano yekugadzira.

Maitiro Akanyanya Kuvandudza LED Thermal Dhizaini

Professional thermal dhizaini inotanga panguva yekuvandudza pfungwa kwete panguva yeprototype yekugadzirisa. Kusarudzwa kwezvinhu kunogadza hwaro hwekudziya, nesarudzo yesubstrate inotungamirwa nemagetsi density kuverenga uye tembiricha yekusangana yakanangana.

Yakakosha dhizaini paramita inopa mapoinzi ekutanga:

• Huremu hwemhangura -Yakaderera 2 oz yeakakwira-simba maapplication ane zvinopisa zvekuparadzira zvinodiwa.
• Thermal kuburikidza ne density - 15-25 vias per square centimita munzvimbo dzakakosha pasi pe LED thermal pads.
• Interface zvinhu - Conductivity inodarika 3 W/mK yekubatanidza kupisa sink.
• Kusimbiswa kwekutanga -Kuongorora kwekupisa kusati kwaita dhizaini, inoteverwa neiyo prototype yekuyedza simbiso.

Kushandisa aya nhungamiro nekukurumidza kunoderedza kudzoreredza kutenderera, kunove yakagadzikana tembiricha yekusangana, uye kuwedzera LED hupenyu. Kune mapurojekiti anoda kudzika kwemafuta simulation, dhizaini yedhizaini, kana rutsigiro rwekusarudza zvinhu, timu yedu yeinjiniya inopa yakagadziridzwa LED PCB yekudziya manejimendi kubvunza kuti ikurumidze kubudirira kwechigadzirwa chako.

Kudyidzana neHighleap: Kudzivirira Yakajairwa LED Thermal Dhizaini Mistake

Kushanda kwe LED kupisa dissipation kunoda kunzwisisa kuti kudziya kwekutonga kunowedzera kupfuura kusarudzwa kwechikamu kune system-level engineering. Zvakajairwa LED yekupisa dhizaini zvikanganiso zvinowanzoitika kubva mukurerutsa uku kuoma kuburikidza nekusarudzika kwezvinhu kusarudzwa, kusakwana kwekupisa kwekupisa, kusakwana kuburikidza nekuita, kana kusarongeka kwekutarisa.

Kubudirira kunoda kubatanidza zvinhu zvakakodzera neyakagadziridzwa geometry, yakasimbiswa kuburikidza nekuenzanisa uye yakasimbiswa kuburikidza nekuyedzwa. Iyi yakarongeka nzira inoshandura kupisa manejimendi PCB dhizaini kubva kumatambudziko anodzokororwa kuita inodzorwa einjiniya maitiro anounza kuita kwakavimbika.

KuHighleap Electronics, timu yedu yeinjiniya inonyanya kugadzirisa magadzirirwo ekupisa kwe LED kuti ishandise ma LED akawanda. Tinopa ongororo yakazara yekupisa, nhungamiro yekusarudza zvinhu, uye masevhisi ekuongorora magadzirirwo kuti tive nechokwadi chekuti magadzirirwo e LED PCB ako anosangana nezvinangwa zvekushanda uye kuvimbika. Taura nesu kuti tikurukure kuti hunyanzvi hwedu hunogona sei kuvandudza mashandiro e LED PCB muchirongwa chako chinotevera.