Dhiraivha ye LED inogona kudzimwa inobatanidza danho rekubuda rakarongeka ne interface yekudzora. Dhiraivha ye LED inogara ichichengetedza kubuda kwakasimba ukuwo chiratidzo chekudzimwa chichiisa danho rakanangwa. Ruzhowa rwe regulation runoenzanisa magetsi anonzwa achipesana ne reference. Murairo wekudzimwa unochinja reference iyoyo, saka kugadzirisa kupenya kwe LED kunoitika panzvimbo yacho. Tambo ye LED inoona nhanho yedhiraivha yakachena, yakaenzana. Kubuda kwechiedza kunodonha kana kukwira zvakanaka, uye emission spectrum inoramba yakagadzikana. Kuchinja kwemavara uye kupenya kunooneka hazvionekwe. Iyi review ye dimmable led driver inotarisa mainjiniya ehardware nezvikwata zvezvigadzirwa zvemagetsi. Inosimbisa dhizaini yebhodhi, kuenzanisa nzira, uye kutengeserana kwekugadzira.
Zvitsva Zvitsva
Sarudza nzira yekudzima inoshanda nesystem yako yekudzora iripo. Izvi zvinokupa mashandiro akapfava, asingatsvedzeri.
Shandisa resistor chaiyo yemagetsi uye kuronga zvakanaka kuti magetsi e LED arambe akadzikama.
Chengetedza frequency yePWM iri pamusoro pe3 kHz. Izvi zvinobatsira kudzivirira kudzima kwaunogona kuona uye matambudziko ehutano.
Ronga dhizaini yekupisa uye marongerwo eEMI nekukurumidza kudzivirira kutadza uye kuve nechokwadi chekuti yakavimbika.
Shandisa runyoro rwekutarisa, mutoro, uye kutevedzera mitemo kuti udzivise matambudziko mumunda.
Kuti Mutyairi we LED Anogona Kudzikiswa Anoshanda Sei
Mutyairi we LED anogona kudzimwa anoita mabasa maviri panguva imwe chete. Anochengetedza magetsi e LED pamutengo wakatarwa, uye anochinja kukosha kwawo kana akaudzwa kuti aite izvozvo. Zvikamu zviri pazasi zvinofukidza danho rekubuda, network yekunzwa, uye nzira yekudzora.
Mutemo weNguva Dzose uye Kunzwa Kwemazuva Ano
Topology ndiyo inotanga. Linear driver inoshandisa chinhu chinopfuudza simba se variable resistor. Switching driver inocheka input uye inosefa mhedzisiro kuburikidza ne inductor ne capacitor. Tafura iri pazasi inoenzanisa zviviri zviri padanho rebhodhi.
Tengesa | Mutyairi wemutsetse | Kuchinja mutyairi |
|---|---|---|
Simba rakanaka | Zvakaipa; chinhu chinopfuudzwa chinotsva (Vin − Vout) × Iload | Yakakwira; kazhinji inenge 90% |
Simba dissipation | Chinhu chakakosha muchikamu chepasi | Yakaderera; sefa inochengetedza simba |
Mutengo uye kuverengwa kwezvikamu | Pasi | Yakakwirira |
Dhizaini yakaoma | Chinhu chiri nyore chekupasa | Chinja, sefa, uye sunga zvakanaka muzvinhu zvidiki |
Buck inoshanda patambo dziri pasi pesimbi inotengeswa, boost inoshanda patambo dzakareba, uye buck-boost inobata njanji dzinoyambuka voltage yetambo. Matanho emutsetse anokwana mabhodhi ane simba shoma, anonyanya kudhura ane nzvimbo yakawanda yemusoro.
Kururama kunoenderana ne sense resistor uye kuti yakagadzirwa sei. Chikamu chinotsungirira tension chakasimba chine temperature drift yakaderera chinochengetedza constant current yakagadzikana. Tungamira mitsara ye sense yakananga kuma resistor terminals kuti uwane Kelvin connection chaiyo. Usamhanyisa sense traces dzakafanana nenzira dze high-current. Isa sense amplifier pedyo ne resistor, chengeta traces mbiri dzakafanana, uye deredza nzvimbo ye loop. Zvichengetedze kure ne switching nodes, uye wedzera guard traces kana space yoga ikatadza. Kudzoka kweground kwakachena pasi pe resistor kunodzivisa load current kuti isakanganise kuyerwa. Iyi discipline inoparadzanisa constant current vs. constant voltage regulation mukuita, nekuti voltage loop inoshivirira layout sloppiness iyo current loop isingaite.
Maitiro Ekudzora Kudzima Kwemvura
Magadzirirwo ebhodhi ane nzira ina dzekudzora kudzima kwechiedza . Kudzima kwechiedza kweanalog kunochinja reference yemagetsi, saka LED inomhanya pamagetsi akaderera. Kudzima kwechiedza kwePWM kunocheka magetsi emagetsi eLED pafrequency yakatarwa uye kunochinja duty cycle. Shunt transistor inodarika chikamu chemagetsi asingachinji. Zviratidzo zvekunze zvekudzima kwechiedza, zvakaita se 0-10V level kana digital bus command, zvinopa chero yenzira idzi kuburikidza nechikamu che interface.
Analog nePWM zvinosiyana kana chiedza chabuda. Kudzima kweanalog hakuiti kuti ruvara ruve rwakadzika, asi kunodziisa ruvara padanho rakaderera nekuti ruvara rwe LED runotevedzera simba remagetsi. PWM inochengetedza ruvara rwakasimba padhiraivha yakazara, asi inomhanya pa100% modulation depth. Chengetedza frequency yePWM iri pamusoro pe3 kHz kwenguva refu kuitira kuti kuratidzwa kwenguva refu kusakonzerese zviratidzo zvehutano. Pasi paizvozvo, maziso anoneta uye zvinhu zvakagadzirwa nekamera zvinoonekwa.
Kuchinja-chinja kwe zero zvinoreva kuti hapana kupenya, nepo PWM driving ichipa kudzika kwekuchinja kwe 100%; nekuchinja kwe 100%, frequency ye flicker inofanira kudarika 3 kHz kuitira kuti pasave nezviratidzo zvehutano zvinoitika panguva yekuratidzwa kwenguva isingaperi.
Kugadziriswa kwetambo uye Kudzungudza Kudzungudza
Dhizaini yetambo inoumba nzira inoshanda. Tambo yakatevedzana ine simba rimwe chete risingachinji, saka LED yega yega inodzima pamwe chete uye mutyairi anofanira kupa simba rakazara retambo. Matavi akafanana anopatsanura simba, uye kusawirirana pakati pematavi kunokonzera kupenya kusina kuenzana panguva yekudzikiswa kwesimba risingachinji. Batanidza matavi ne ballast resistors kana kushandisa nzira dzakasiyana. Kucheka kwePWM kunosimbisa simba reparasitic mutambo refu, uye kudzima kweanalog kunodzivirira kurasikirwa kwekuchinja. Shunt transistor inotambisa simba rakapfuudzwa sekupisa, saka chengetedzai tambo pfupi dzine thermal margin.
Nzira dze LED Constant Current Driver Dimming
Nzira imwe neimwe ine mutengo wakasiyana padanho rebhodhi. Huwandu hwezvikamu, zvinodiwa pakupatsanura, maitiro ekudzima, uye kuenderana kwemadziro zvinosiyanisa sarudzo idzi. Kuenzanisa kuri pazasi kunotsanangura kutengeserana.
nzira | Mutengo webhodhi | Isolation | Maitiro eFlicker | Kukwana kwemadziro ekudzora madziro |
|---|---|---|---|---|
TRIAC | Kumberi kwakachekwa-chikamu, chinoburitsa ropa, network inonyorovesa | Kazhinji hazvigari zvega | Njodzi kana mutyairi asina kupihwa gwaro reTRIAC | Inoshanda neTRIAC wall dimmers dziripo |
ELV | Dunhu rekuona magumo ekutevera | Kazhinji hazvigari zvega | Njodzi inobva pakusawirirana kwemutyairi ne dimmer | Inoda dimmer ine giredhi reELV |
0-10V | Waya mbiri dzekudzora, RC filter, danho rekutarisa | Kazhinji yakaparadzaniswa nedivi rekudzora | Haina musono uye haina kudzima-dzima zvachose | Inoda 0-10V control, kwete ELV dimmer |
PWM | Pini yekuisa yedhijitari, hapana firita | Zvinoenderana nechikamu che interface | Chenesai pahuwandu hwakawanda | Inoda PWM source |
DALI | Transceiver yebhazi uye protocol stack | Kuzviparadzanisa kweGalvanic kwakajairika | Nzvimbo yakapfava, yedhijitari | Inoda DALI controller |
Triac, ELV, uye 0-10V Dimming
TRIAC neELV zvese zvinoshandisa kudzima kwechikamu chimwe chete. TRIAC inocheka mupendero wepamberi, uye ELV inocheka mupendero wekutevera. Madhiramu eEV anotanga agadzira low-voltage halogen loads pama electronic transformers. Kupenya uye ruzha pama setup aripo zvinobva pakusawirirana kwe dimmer-driver, kwete kubva ku LED pachayo. Chikwata che hardware chinofanira kusarudza madhiraivha e triac dimmable LED akaongororwa kuti aonekwe se control yakaiswa. Usasanganise TRIAC ne ELV fixtures pane imwe dimmer. Haazodzimi zvakafanana pane imwe zone, uye pane mukana mudiki wekuti LED, driver, kana dimmer ikundikane. Chengeta mhando yega yega iri panzvimbo yayo.
ELV haisi dimming ye 0–10v. ELV inocheka voltage yemutsara panzvimbo yayo. Driver ye 0-10V inosiya simba rega uye inoverenga level kubva kune waya dzakasiyana dze control. Kupatsanurwa ikoko kunoita kuti pave ne output isina musono, isina kudzima-dzima mu range yese. Driver ye 0-10V inoda control ye 0-10V, kwete ELV dimmer. Zviratidzo zve dimming patambo refu dze control zvinodzikira voltage, uye driver yega yega inogona kudhonza 100–500 µA kubva ku master, izvo zvinovhara huwandu hwe device.
Kudzikisa PWM, Analog, uye DALI
Kudzima kwePWM dzimwe nguva kunonzi hakuenderane nemadhiraivha emagetsi asingachinji. Mutyairi wemagetsi asingachinji haana chinhu chinopindira chinobvuma murairo wakachekwa. Madhiraivha emagetsi anochinjika epwm anowedzera chinhu ichocho, saka mutyairi anoverenga duty cycle uye anotonga magetsi zvinoenderana. PWM chaiyo ine internal MCU inogamuchira chero peak voltage uye wide frequency range. PWM yenhema yakavakwa kubva kuRC filter inoda 10V peak, kana kuti accuracy inodonha zvakanyanya.
Kudzora analog ndiyo nzira inonyanya kushandiswa, inotsanangurwa neIEC60929 Annex E. DALI inzira yedhijitari ine nzira mbiri pasi peIEC62386. DALI-1 inobata madhiraivha anosvika makumi matanhatu nemana, uye DALI-2 inotsigira michina inosvika zana nemakumi maviri nemasere ine nzira yakakura yekubatanidza protocol ye dimming cross-brand. D4i inowedzera kuongororwa uye mishumo yesimba. Chishandiso chega chega cheDALI chinoda kuongororwa nenyanzvi yeDALI tester uye kunyorwa pawebhusaiti yeDiiA.
Dhizaini yetambo inoenderana nenzira yega yega. Tambo yakatevedzana ine simba rimwe chete, saka ma LED ese anodzima pamwe chete. Matavi akafanana anoda ma ballast resistors kana nzira dzakasiyana kudzivirira kubuda kusina kuenzana. Kucheka kwePWM kunosimbisa simba reparasitic mutambo refu, uye kudzima kweanalog kunodzivirira kurasikirwa ikoko. Shunt transistor inorasa simba rakapfuura sekupisa, saka chengetedzai tambo pfupi dzine thermal margin. Mapoka anosarudza pakati pemhando dzema dimmable led drivers anofanira kufananidza nzira netambo kutanga, vozosimbisa dimmer compatibility uye dimming range vachipesana nedatasheet.
Magadzirirwo eDhivhari ye LED Inokwanisa Kudzikiswa
Kushanda Kwemagetsi uye Kudzikira Kwechiedza
Tanga nematanho ekubuda kwemagetsi nemagetsi. Voltage yekubuda kwemagetsi yemutyairi inofanira kufukidza voltage yekumberi yetambo ye LED. Voltage yemutyairi inofanira kunge iri pamusoro pe2V pamusoro pevoltage yekumberi ye LED, izvo zvinomira kudzima. Tarisa kururama kwemagetsi panguva yese yekudzima magetsi, kwete chete kana magetsi apera. Mutyairi anoramba akabatirira pa100% anogona kudonha zvakanyanya pamazinga akaderera.
Kudzikisa mwenje uye resolution zvinoisa kuti mudziyo unogona kudzikira zvakadii. PWM inochengetedza instantaneous current uye color point dzakagadzikana, ne dimming ratios inosvika 300:1 kusvika 5000:1. Analog dimming iri nyore, asi inochinja forward voltage uye color temperature pakupenya kwakaderera, uye inosvika pa10:1 kusvika 20:1 chete. Kushandisa nzira dzese dziri mbiri pamwe chete kunowedzera mutsetse. Simbisa mutoro mudiki uye kushanda zvakanaka panzvimbo chaiyo yekushanda, nekuti switching stage inorasikirwa nekushanda zvakanaka.
Kupisa, EMI, uye Dziviriro
Kupisa kunosarudza kuvimbika kwenguva refu. Paradzira maMOSFET, ma rectifier diodes , ma transformer, uye ma inductors kuitira kuti hotspots dzisaungane, wozviisa pedyo nemhepo inoyerera kana kuti ma heat sinks. Kudururwa kwemhangura hombe pamusoro nepakati pezvikamu kunoparadzira kupisa, uye kupisa kuburikidza ne arrays pasi pe hot pads kunoiendesa ku copper yepasi kana external heat sink. Kune simba rakawanda, aruminiyamu Metal Core PCBs kana ma heavy copper boards anokunda FR-4, asi anodhura zvakanyanya.
EMI kubva pamatanho ekuchinja inoda kurongeka kwakanyatsonaka. Chengetedza nzvimbo yekuchinjana kwemagetsi iri diki kubva kuinductor kuenda kuFET kusvika pasi, nekuti nzvimbo ye loop inoisa zvakananga EMI ine radiation. Wedzera OVP, OCP, OTP, uye short-circuit dziviriro, uye sarudza driver IC chete kana topology yaenderana nehukama hwe input-to-string voltage.
Kutevedzera Mutemo uye Kuenderana
Isa chitupa pane checklist nekukurumidza. Tarisa kuti une UL, CE, kana RoHS marking, uye simbisa kuti PFC inoshanda here pakuisa zvinhu zvemabhizinesi. Enzanisa nzira yekudzima ne control yakaiswa, uye edza sampuro pasi pemamiriro ekupisa chaiwo uye ekudzima usati waburitsa.
Cherechedza: torai simba rekudzivirira simba remagetsi serinokosha pakushanda. Kurongeka kwekugadzira kwakachinjana Kelvin 4-pad shunt ne simba remagetsi maviri kwakakonzera musiyano wehuwandu hwemagetsi kusvika padanho remagetsi ragadziriswazve.
Spec
Zvekusimbisa
Kurongeka kwezvinobuda
Kushivirira kwese kwese kudzima kwechiedza
Kuramba kusvika
Chiyero chePWM vs analog, chiyero chidiki
Thermal dhizaini
Nzvimbo yemhangura, nzvimbo dzinopisa, sarudzo ye substrate
Protection
OVP, OCP, OTP, dunhu pfupi
kutevedzera
UL, CE, RoHS, PFC
Maitiro Ekusarudza Mutyairi we LED Anogona Kudzikiswa
Mainjiniya vanobvunza kuti vangasarudza sei dhiraivha ye LED inodzimwa yakakodzera vanowanzosangana nematambudziko akafanana. Mazano ari pazasi anotanga nezviratidzo, obva aratidza zvinodiwa neapplication kuti iite specs.
Kugadzirisa Matambudziko Anowanzo Kudzikira Kwemvura
Kudzima magetsi pamagetsi mashoma kunowanzobva kumutyairi ane voltage shoma inobuda iri pedyo zvakanyanya nevoltage ye string forward. Buzz inowanzobva ku dimmer ye phase-cut ichirwisa danho rekupinda kwemutyairi. Kufamba kusina simba pasi pe dimming range kunoratidza kusawirirana pakati pe low end ye control ne minimum rated yemutyairi. Matambudziko ekupisa anotanga kana mudziyo ukashandisa mutyairi pedyo nemuganhu wawo mukati meimba yakavharwa.
Tanga kugadzirisa matambudziko emadhiraivha e LED anogona kuderedzwa uchishandisa tafura yezviratidzo. Tarisa kuti mudhiraivha ne dimmer zvinoenderana here usati wachinja hardware.
Chiratidzo | Zvichida chikonzero | Kuongorora kwekutanga |
|---|---|---|
Inopenya padanho rakaderera | Hapana magetsi akakwana | Voltage shoma inobuda vs voltage yetambo |
Ruzha runonzwika | Kudyidzana kwewaveform yechikamu chechikamu | Rudzi rweDimmer ruchienderana nechiyero chemutyairi |
Kufamba usina kufa | Kusawirirana kwenzvimbo yekudzora uye yemutyairi | Yakayerwa mwero wekudzima kwechiedza chepasi |
Kusiya basa kana kuchipisa | Kudzikiswa kwekupisa | Tembiricha yekesi painorema zvakakwana |
Kufananidza Madhiraivha nezvinodiwa zveApplication
Mepu yesystem yekudzora yatoiswa pakutanga. TRIAC wall dimmer inoda unit yakayerwa neTRIAC, uye bhazi rekuvaka rinoda dimming protocol compatibility nebhazi iroro. Simbisa compatibility ye dimming uchienzaniswa nerondedzero yemugadziri. Wobva waenzanisa led constant current driver output ne string voltage ne current, uye tarisa kuti dimming range inofukidza low level inodiwa nenzvimbo.
Rondedzero yeKusarudza uye Kuchinjana kweDFM
Gadzira cheki yekutarisa system yekudzora, mutoro, uye kutevedzera zvinodiwa. Tarisa kurongeka kwezvinobuda mumagetsi, maseketi ekudzivirira, uye mamaki echitupa. Wobva wayera zvirambidzo zveDFM. Kelvin anonzwa tsoka, kupisa kuburikidza ne arrays, uye nzvimbo yekuchekerera yemativi ekudzora akaparadzana zvese zvinokanganisa huwandu hwepaneru uye mutengo wekubatanidza. Zvinodzora zvinogadziriswa zve dimming zvinowedzera chinongedzo uye danho rekuyedza. Simbisa kuti mugadziri wechibvumirano anogona kuyedza dimming panzvimbo dzakasiyana siyana, kwete kungoita full output chete.
Zano: kiya nenzira yekuti resistor footprint uye dimming interface usati waburitsa layout. Shanduko dzinononoka dzinopinda mumastencil, matest fixtures, uye ma qualification samples.
Dhiraivha ye LED inodzimwa inoshanda zvakanaka padanho rebhodhi kana current loop uye control interface zvichiwirirana. Network ye sense inochengetedza current yakadzikama, uye dimming input inochinja reference. Enzanisa nzira ye dimming ne system yekudzora yakaiswa, tambo setup, thermal budget, uye compliance marks. Shandisa sarudzo checklist uye symptoms table panguva yekutsanangurwa. Ronga DFM miganhu pakutanga, kusanganisira sense resistor footprints uye test coverage panzvimbo dzakasiyana siyana dze dimming. Kufananidza zvakanaka padanho re schematic kunobhadhara pamutsetse wekugadzira. Mapoka anoronga dimming uye kuronga pamwe chete anovaka fixtures dzine output yakagadzikana uye field returns shoma.
FAQ
Kudzima kwe analog kunochinja ruvara rwechiedza here?
Ehe. Kudzora kweanalog kunoderedza magetsi akananga kuburikidza ne LED, uye chiedza chinoshanduka chichienda kumatoni anodziya pamazinga akaderera. Matimu anoda poindi yeruvara rwakasimba anofanira kusarudza PWM control panzvimbo pezvo. PWM inochengetedza magetsi anokurumidza kugadzikana uye inochengetedza ruvara rwakafanana mumhando dzakasiyana.
Sei chinhu chinobatidza pasi penzvimbo yacho?
Mutyairi anowanzo shaya headroom yemagetsi. Voltage shoma inobuda iri pedyo zvakanyanya nevoltage yetambo inoenda mberi. Mainjiniya vanofanira kuona kuti output yemutyairi inogara iri pamusoro pevoltage yetambo ye LED ne 2V. Kusawirirana pakati pe control ne driver range kunogonawo kukonzera kufamba kusina kunaka pa low end.
Mutyairi wemagetsi asingaperi anogona kugamuchira chiratidzo chePWM here?
Kwete. Mutyairi wemagetsi asingachinji haana chinhu chinoverenga murairo wakachekwa. Madhiraivha anodzimwa anowedzera chinhu ichocho uye anoisa simba kubva padanho rebasa. Vatengi vanofanira kutarisa kuti mutyairi anonyora PWM dimming padheti rake redata vasati vasarudza kuti riitwe papurojekiti.
Bhazi rimwe chete reDALI rinogona kunyorerwa nevatyairi vangani?
DALI-1 inogadzirisa vatyairi vanosvika makumi matanhatu nevana mubhazi rimwe chete. DALI-2 inowedzera muganho iwoyo kusvika kumidziyo zana nemakumi maviri nemasere uye inowedzera kushandira pamwe kwemhando dzakasiyana. Mudziyo wega wega uchiri kuda kuongororwa nenyanzvi yeDALI tester uye kunyorwa pawebhusaiti yeDiiA usati waburitswa.
