Saizi dzeSMD LED Package: 2835 vs 5050 vs 3528 uye PCB Sarudzo

Saizi dzeSMD LED package dzakadai se2835, 5050, uye 3528 dzinokuudza zvinopfuura kungotevera tsoka chete: dzinoratidza kubuda kwelumen, nzira yekupisa, huwandu hweassembling, uye rudzi rwePCB runodiwa pasi payo. Kusarudza package yakakodzera zvinoreva kuyera mashandiro e optical, dhizaini yemutyairi, uye kubviswa kwekupisa pane kutsvaga saizi imwe chete. Gwaro iri rinoenzanisa saizi dzakajairika dzeSMD LED package, rinotsanangura COB vs SMD tradeoffs, uye rinoratidza kuti Highleap Electronics inovaka sei mabhodhi eLED anogara achitonhorera uye akavimbika.

1. Chii chinonzi chip yeSMD LED?

LED yeSMD idiode inoburitsa chiedza pamusoro pechinhu chinoiswa pamusoro pechinhu — LED yakavakwa mupakeji diki, yakati sandara inosungirirwa zvakananga pamusoro pePCB kwete kuburikidza nemaburi ane waya. Kurongedza uku kunoita kuti zvive zvidiki, zvakakodzera kuunganidza otomatiki, uye zviri nyore kurongedza zvakazara, ndosaka zvichinyanya kushandisa mwenje yemazuva ano, madhiraivha, uye zviratidzo.

LED yega yega yeSMD ine imwe kana kupfuura semiconductor dies inoburitsa chiedza, yakaiswa mupakeji ine materminals anosonererwa uye kazhinji kacho thermal pad diki pasi kuti inotakura kupisa mubhodhi. Iyo thermal pad ndiyo chinhu chakakosha: LED inoshandura chikamu chesimba rayo kuita chiedza uye zvimwe zvese kuita kupisa, uye kwainoenda kupisa ikoko kunosarudza kugadzikana kwechiedza che LED uye hupenyu hwese. Nekuti ma LED akaiswa nenzira dzakafanana nedzimwe nzvimbo dzinoiswa pamusoro, kuvaka chigadzirwa che LED ibasa rekubatanidza pamusoro - nekugadzirwa kwethermal sekutenderera kunochisiyanisa.

2. Tsananguro yehukuru hweSMD LED: 2835 vs 5050 vs 3528

Makodhi eSMD LED saizi ingori kureba nehupamhi hwepakeji mumamirimita: 2835 ine 2.8 × 3.5 mm, 5050 ine 5.0 × 5.0 mm, uye 3528 ine 3.5 × 2.8 mm. Nhamba yacho inokuudza tsoka, uye tsoka yacho inoenderana nekuti pakeji inogona kubata simba rakawanda sei uye kuti mangani madhiri ayo. Mhando dzakajairika:

A 5050 inowanzova nemadhiraivha matatu (achibvumira RGB kusanganisa mavara), nepo 2835 ne3528 zvichiwanzova nemadhiraivha rimwe chete, 2835 yakagadzirirwa kushanda zvakanaka mumuviri mudiki. Mapakeji makuru ane simba rakawanda anoderedza kupisa kwakawanda, izvo zvinowedzera kudiwa kwenzira yekupisa yebhodhi - zvichikurudzira zvakananga sarudzo ye substrate yakakurukurwa pazasi. Sarudza saizi yechiedza chako, ruvara, uye huremu, wobva wagadzira bhodhi kuti ibvise kupisa kwarinogadzira.

3. COB vs SMD LED: ndeipi iri nani?

Ma LED eSMD ma diode akasungirirwa akasiyana-siyana akaiswa pabhodhi, nepo COB (chip-on-board) inobatanidza ma LED akawanda asina chinhu pamwe chete pasi pe phosphor coating imwe chete kuti igadzire chiedza chakafanana — COB inokodzera chiedza chakasimba, chisina kupenya, SMD inokodzera marongero anochinjika, kusanganisa mavara, uye magadzirirwo anodhura. Hapana chimwe chazvo chiri nani pasi rose; chinogadzirisa matambudziko akasiyana:

• SMD Inoparadzira ma LED akasiyana-siyana, ayo anochinjika kune mitsetse, madhiraivha, ruvara rweRGB, uye zvigadzirwa zvakasiyana-siyana, uye kazhinji inodhura zvishoma.
• COB Mapoka akawanda anofa kuita emitter imwe chete, zvichipa chiedza chakawanda kubva munzvimbo diki ine kupenya kwakafanana -- yakakodzera magirazi echiedza, marambi ekudzivirira, uye magadzirirwo emagetsi anoburitsa simba rakawanda.

Nekuti COB inounganidza ma dies akawanda munzvimbo diki, huwandu hwayo hwekupisa hwakanyanya, zvichiita kuti substrate yekupisa ive yakakosha kupfuura yeSMD. Kuchinjana pakati pezviviri izvi kunoratidzwa mukuenzaniswa uku kwemabhodhi eCOB LED neSMD LED , uye ese ari maviri anoenderana nebhodhi rinogona kutakura kupisa kwawo.

4. Nei maPCB e LED achishandisa aruminiyamu (kutarisira kupisa)

Ma LED PCB anowanzo shandisa substrate yesimbi-yakasimba yealuminium nekuti aruminiyamu inofambisa kupisa zviri nani kupfuura FR-4 yakajairwa, ichibvisa kupisa kubva kuma LED kuti agare achitonhorera, achipenya, uye achigara kwenguva refu. Ma LED anoderedza uye anochinja ruvara paanopisa, saka kubvisa kupisa kubva mupakeji ndicho chinhu chinonyanya kukosha pakuvimbika kwechigadzirwa che LED - uye FR-4 imhepo isina simba yekupisa.

Bhodhi resimbi rinoisa dielectric yakatetepa pamusoro pechigadziko chearuminiyamu, saka kupisa kubva pajira rekupisa re LED rega rega kunopfuura nekukurumidza kupinda musimbi uye kubuda kuenda kuheatsink kana enclosure. Ndokusaka aruminiyamu LED PCB iriyo yekutanga yemwenje, uye nei mwenje wekunze nemotokari uchinyanya kuivimba nayo - zvishandiso zvinofanirwa kurarama kupisa nemamiriro ekunze zvinoshandisa mabhodhi akaita se LED PCB yemotokari . Kana ma LED achipisa uye achiwedzera kukora, substrate inonyanya kusarudza hupenyu hwechigadzirwa, izvo zvinoita kuti kugadzirwa kwearuminiyamu PCB inoziva kupisa kuve pakati pekushanda kwe LED.

5. Maitiro ekusonesa ma LED eSMD pasina kuakuvadza

Ma LED eSMD anosolder ane chimiro che "reflow" chakadzorwa uye huwandu hwakakodzera hwe "paste", nekuti ma LED anonzwa kupisa nehunyoro uye anogona kukuvara nyore nyore nekupisa kwakanyanya kana thermal-pad joint isina kunaka. Kupisa zvakanyanya panguva yekusolder kunokanganisa LED isati yatanga kupenya, uye thermal pad isina kunaka inokanganisa kubviswa kwekupisa pabasa. Zvinhu zvakakosha:

• Shandisa purogiramu yakakodzera yekudzokororazve. Ma LED ane tembiricha yepamusoro uye muganho wekuratidzwa; kugara mukati meprofile kunodzivirira die nephosphor.
• Sunga zvakanaka thermal pad. Joinhi yepad ndiyo nzira yekubuda nayo pakupisa ye LED, saka inoda kunyoroveswa zvakanaka uye vhoriyamu yakakodzera yekunamira, kazhinji ine ma thermal vias pasi payo.
• Kunzwa kwehunyoro hwepfungwa. Ma LED mazhinji anonzwa hunyoro uye anoda kubikwa zvakanaka uye kubatwa zvakanaka asati adzoserwa mvura kuti asakuvara.
• Chengetedza namatidza pamapakeji madiki. Matombo madiki e LED anogona kuvharwa nematombo kana vhoriyamu ye paste ne pad pad zvisina kuenzana.

Idzi idzo nzira dzekugadzirisa zvinhu, ndosaka kunze kwezvikamu zvishoma zvakaiswa nemaoko, ma LED ari pamutsetse wekugadzirisa magetsi unodzorwa uko chimiro, paste, uye kubata zvinotarisirwa uye majoini anoongororwa.

6. Magadzirirwo anoitwa mabhodhi e LED akavimbika eHighleap

Highleap inovaka mabhodhi e LED panzvimbo yakakodzera yekupisa — simbi yealuminium-core yemwenje yakawanda, ine FR-4 kana zvimwe zvinhu pazvinokwana — uye inounganidza ma LED nemaitiro ekudzokorodza magetsi uye kuongorora. Substrate yacho inoenderana nehuwandu hwesimba re LED nenzvimbo yechigadzirwa, saka kupisa kune nzira chaiyo yekubuda uye ma LED anochengetedza kupenya kwawo neruvara nekufamba kwenguva.

Kudivi rekubatanidza, kuiswa kwe LED, chimiro chekuyerera kwemvura, kubata hunyoro, uye majoini e thermal-pad zvinodzorwa, neAOI ichisimbisa kuiswa uye mhando ye solder mubhodhi rese. Nekuti tsoka dze LED uye magadzirirwo e thermal-pad zvinokanganisa zvakanyanya goho, ongororo yekugadzira isati yagadzirwa inoongorora kutanga. Highleap inovhara magumo aya kusvika kumagumo kuburikidza ne turnkey assembly , kubva pa prototype run kusvika pahuwandu. Paunokumbira mutengo, govera rudzi rwe LED nehukuru, huwandu hwe LEDs nesimba rese, nzvimbo yekushanda, uye chero zvinodiwa zve thermal kana optical kuitira kuti bhodhi nemaitiro zvigadzirwe nemazvo.

7. Mibvunzo Inowanzo bvunzwa NezveSMD LED

Nhamba dziri mu2835 kana 5050 LED dzinorevei?

Ndiwo ma package saizi muma millimeter — 2835 ine 2.8 × 3.5 mm uye 5050 ine 5.0 × 5.0 mm. Kodhi iyi inokuudza saizi yetsoka, iyo inoenderana nekubata simba uye huwandu hwema dies ari mukati.

Mangani madhiri ari mu5050 LED?

A 5050 inowanzova nema LED die matatu, izvo zvinoita kuti RGB isanganiswe kana kuti pasuru imwe chete ibudiswe ne RGB. Mapakeji madiki akadai se 2835 ne 3528 anowanzova ne die rimwe chete.

Sei ma LED angu achichinja ruvara nekufamba kwenguva?

Kazhinji kupisa. Ma LED anowanzo shanduka uye anochinja ruvara kana achipisa, saka kubvisa kupisa zvakanaka - substrate isina kukwana kana thermal-pad joint yakaipa - kunopfupisa hupenyu hwawo uye kunoadzima. Nzira chaiyo yethermal board ndiyo nzira huru yekudzivirira.

Ma LED eSMD anogona kutengeswa nemaoko here?

Magaba mashoma nekungwarira, asi anodzivirira kupisa uye hunyoro uye ane tsoka diki dzinokasira kutemwa nematombo, uye thermal pad yakaoma kusanganisa zvakanaka nemaoko. Kana tichitarisa huwandu kana mhando, nzira yekudzoreredza mvura inodzorwa yakavimbika zvikuru.

Ndeupi musiyano uripo pakati pechip ye LED nepakeji ye LED?

Chip (die) isimbi isina chinhu inoburitsa chiedza; package yacho ndiyo imba — ine materminals, lens kana phosphor, uye kazhinji thermal pad — inodzivirira die uye inoita kuti igone kusanganiswa. SMD LED idie yakaputirwa.

Mabhodhi ese e LED anofanira kunge ari aruminiyamu here?

Kwete — zviratidzo zvesimba shoma zvinoshanda zvakanaka paFR-4. Mabhodhi esimbi ealuminium anoshandiswa kana kupisa kwe LED kwakakosha, senge mwenje, nekuti anotakura kupisa zviri nani uye anochengetedza ma LED achitonhorera, achipenya, uye achigara kwenguva refu.