Bayanin Fasaha na LED LTST-C950KSKT SMD - LED Mai Launin Rawaya AlInGaP - 25mA - 62.5mW - Takardun Fasaha na Hausa

1. Bayanin Samfur

LTST-C950KSKT wani LED ne mai hawa saman, mai ƙarfin haske wanda aka tsara don aikace-aikacen lantarki na zamani waɗanda ke buƙatar amintaccen tushen haske, ƙanƙanta, da inganci. Ta amfani da ci-gaban fasahar AlInGaP (Aluminum Indium Gallium Phosphide), wannan LED yana ba da ƙarfin haske mai girma a cikin ƙaramin fakitin. Babban manufar ƙirarsa ita ce sauƙaƙe hanyoyin haɗawa ta atomatik yayin samar da aiki mai daidaito a cikin mahalli masu ƙunci.

1.1 Fa'idodi na Asali

Babban fa'idodin wannan ɓangaren ya samo asali ne daga kayan sa da ginin sa. Kayan semiconductor na AlInGaP an san shi da inganci mai girma da ingantaccen launi a cikin bakan launin rawaya-lemu-ja. Ƙirar ruwan tabarau na dome tana haɓaka fitar da haske da kusurwar kallo. Bugu da ƙari, na'urar ta dace da umarnin RoHS (Ƙuntata Abubuwa Masu Hatsari), wanda ya sa ta dace da kasuwannin duniya masu ƙaƙƙarfan ƙa'idodin muhalli. Dacewarsa da hanyoyin gyarar IR reflow ya yi daidai da layukan haɗa PCB na zamani, marasa gubar (Pb-free), yana tabbatar da yawan ƙirƙira.

1.2 Kasuwa da Aikace-aikace

An ƙera wannan LED don ɗimbin na'urorin lantarki na masu amfani da masana'antu. Babban kasuwannin da aka yi niyya sun haɗa da sadarwa (misali, wayoyin salula da maras igiya), kwamfuta (kwamfutocin tebur, madannai), tsarin hanyar sadarwa, na'urorin gida, da alamun cikin gida. Takamaiman aikace-aikace suna amfani da haskensa da ƙirar ƙirar sa don hasken madannai/madannai, nuna matsayi, ƙananan nuni, da nau'ikan fitilun sigina ko alamomi daban-daban.

2. Ma'auni na Fasaha: Cikakken Fassarar Manufa

Fahimtar halayen lantarki da na gani yana da mahimmanci don ingantaccen ƙirar da'ira da hasashen aiki.

2.1 Matsakaicin Matsakaicin Matsakaici

Waɗannan ƙididdiga suna ayyana iyakokin damuwa waɗanda sama da su lalacewa na dindindin na iya faruwa. Na'urar na iya watsar da matsakaicin wutar lantarki na 62.5mW. Ci gaba da igiyar gaba ta DC an ƙididdige shi a 25mA, yayin da mafi girman ƙarfin igiyar gaba na 60mA ya halatta a ƙarƙashin yanayin bugun jini (1/10 aikin aiki, faɗin bugun 0.1ms). Matsakaicin ƙarfin lantarki na baya shine 5V. Yankunan zafin aiki da ajiya sune -30°C zuwa +85°C da -40°C zuwa +85°C, bi da bi. Wuce waɗannan iyakoki, musamman na yanzu da zafin jiki, na iya rage rayuwar LED da fitar da haske.

2.2 Halayen Lantarki da Na Gani

An auna a daidaitaccen zafin haɗin gwiwa na 25°C da igiyar gaba (IF) na 20mA, an ayyana ma'auni na aiki na yau da kullun. Ƙarfin haske (Iv) yana da faɗi daga mafi ƙanƙanta na 1120 millicandelas (mcd) zuwa matsakaicin 4500 mcd, tare da ƙimar yau da kullun da ake tsammani a cikin wannan kewayon kwandon shara. Kusurwar kallo (2θ1/2), inda ƙarfin ya rabi ƙimar kan-axis, shine digiri 25, yana nuna ƙaramin haske mai mai da hankali. Tsawon tsayin fitarwa (λP) shine 588 nm, yana sanya shi cikin bakan rawaya. Tsawon tsayin rinjaye (λd) ya bambanta daga 584.5 nm zuwa 597.0 nm dangane da kwandon shara. Ƙarfin lantarki na gaba (VF) yakan faɗo tsakanin 1.8V da 2.4V a 20mA, wanda yake da mahimmanci don ƙirar direba. An ƙayyade ƙarfin lantarki na baya (IR) a matsakaicin 10 μA lokacin da aka yi amfani da ƙarancin lantarki na baya na 5V.

3. Bayanin Tsarin Kwandon Shara

Don tabbatar da daidaiton launi da haske a cikin samarwa, ana rarraba LED zuwa kwandon shara bisa mahimman ma'auni.

3.1 Kwandon Shara na Ƙarfin Lantarki na Gaba (VF)

Ana rarraba LED zuwa kwandon shara na ƙarfin lantarki guda uku (D2, D3, D4) tare da kewayon 1.8-2.0V, 2.0-2.2V, da 2.2-2.4V bi da bi, an auna su a 20mA. Ana amfani da jurewar ±0.1V ga kowane kwandon shara. Wannan yana ba masu ƙira damar zaɓar LED tare da daidaitaccen daidaitawar ƙarfin lantarki don aikace-aikacen da ƙa'idodin yanzu yake da mahimmanci.

3.2 Kwandon Shara na Ƙarfin Hasken (IV)

An rarraba haske zuwa kwandon shara guda uku: W (1120-1800 mcd), X (1800-2800 mcd), da Y (2800-4500 mcd), duk a 20mA. Ana amfani da jurewar ±15% a kowane kwandon shara. Wannan kwandon shara yana da mahimmanci ga aikace-aikacen da ke buƙatar daidaiton haske a cikin alamomi da yawa.

3.3 Kwandon Shara na Launi (Tsawon Tsayin Rinjaye)

An sarrafa launin launi daidai ta hanyar kwandon shara na tsayin tsayi guda biyar: H (584.5-587.0 nm), J (587.0-589.5 nm), K (589.5-592.0 nm), L (592.0-594.5 nm), da M (594.5-597.0 nm), tare da jurewar ±1 nm. Wannan yana tabbatar da ƙarancin bambancin launi tsakanin raka'a daban-daban a cikin guda ɗaya na samarwa ko aikace-aikace.

4. Bincike na Lankwasa Aiki

Duk da yake an yi nuni da takamaiman jadawali a cikin takardun bayanan, abubuwan da suke nufi suna daidai. Lankwasa na igiyar gaba da ƙarfin lantarki na gaba (I-V) yana nuna alaƙar ƙima na yau da kullun na diodes. Lankwasa na ƙarfin haske da igiyar gaba yana nuna yadda fitarwa ke ƙaruwa tare da igiyar ruwa, amma dole ne masu ƙira su tsaya a cikin matsakaicin matsakaicin ƙididdiga. Lankwasa na rarraba bakan yana tsakiya a kusa da 588 nm tare da matsakaicin rabin faɗin (Δλ) na 15 nm, yana tabbatar da launin rawaya mai tsabta. Aiki zai bambanta da zafin yanayi; ƙarfin haske gabaɗaya yana raguwa yayin da zafin jiki ya ƙaru.

5. Bayanin Injiniya da Fakitin

5.1 Girman Fakitin

LED ya yi daidai da daidaitaccen fakitin SMD. Mahimman girma sun haɗa da girman jiki, tazarar jagora, da tsayin gabaɗaya. Duk girma ana bayar da su a cikin milimita tare da daidaitaccen jurewar ±0.1mm sai dai idan an lura da haka. Ruwan tabarau yana da tsabta, kuma launin tushen shine rawaya daga guntu na AlInGaP.

5.2 Gano Polarity da Ƙirar Pad

Bangaren yana da alamun anode da cathode. An ba da shirin ƙirar ƙasa na PCB (sawun ƙafa) don tabbatar da ingantaccen samuwar haɗin gwal, kwanciyar hankali na injiniya, da sarrafa zafin jiki yayin da kuma bayan aikin gyarar. Yin bin wannan ƙirar yana da mahimmanci don ingantaccen haɗawa.

6. Jagororin Gyarawa da Haɗawa

6.1 Yanayin Gyarar IR Reflow

Don hanyoyin marasa gubar (Pb-free), an ƙayyade matsakaicin zafin reflow na 260°C, tare da jikin ɓangaren a wannan zafin jiki na matsakaicin dakika 10. Ana ba da shawarar matakin pre-heat. Bayanin martaba ya kamata ya bi ƙa'idodin JEDEC don hana girgizar zafi da tabbatar da amintattun haɗin gwal ba tare da lalata tsarin ciki na LED ko ruwan tabarau na epoxy ba.

6.2 Gyarar Hannu

Idan gyarar hannu tare da ƙarfe ya zama dole, zafin ƙarshen bai kamata ya wuce 300°C ba, kuma lokacin tuntuɓar ya kamata a iyakance ga matsakaicin dakika 3 a kowane pad. Wannan ya kamata a yi sau ɗaya kawai don guje wa lalacewar zafi.

6.3 Ajiya da Sarrafawa

LED suna da damuwa da danshi (MSL 3). Lokacin da aka adana su a cikin ainihin jakar su mai rufaffiyar danshi tare da desiccant, suna da tsawon rayuwa na shekara guda a ƙarƙashin yanayin ≤30°C da ≤90% RH. Da zarar an buɗe jakar, ya kamata a yi amfani da su cikin mako guda. Don dogon ajiya bayan buɗewa, dole ne a adana su a cikin yanayi mai bushewa (≤30°C, ≤60% RH, zai fi dacewa a cikin akwati mai rufi tare da desiccant). Idan an fallasa sama da mako guda, ana buƙatar gasa a kusan 60°C na aƙalla sa'o'i 20 kafin gyarawa don hana \"popcorning\" yayin reflow.

6.4 Tsaftacewa

Idan ana buƙatar tsaftacewa bayan gyarawa, kawai takamaiman kaushi na barasa kamar isopropyl alcohol (IPA) ko ethyl alcohol ya kamata a yi amfani da su. Sinadarai da ba a ƙayyade ba na iya lalata fakitin LED ko ruwan tabarau.

7. Bayanin Fakitin da Oda

Ana ba da LED akan kaset ɗin mai ɗaukar kaya mai faɗin 8mm, wanda aka nannade akan reels mai diamita 7-inch (178mm). Kowane reel yana ƙunshe da guda 2000. Don ƙididdiga ƙasa da cikakken reel, mafi ƙarancin adadin fakitin guda 500 yana samuwa. Fakitin yana bin ƙa'idodin ANSI/EIA-481. Lambar ɓangaren LTST-C950KSKT ta keɓance wannan takamaiman bambancin LED na AlInGaP SMD rawaya.

8. Shawarwarin Aikace-aikace

8.1 Da'irori na Aikace-aikace na Yau da Kullun

Dole ne a tuka LED tare da tsarin iyakance yanzu. Mai juriya na jere mai sauƙi ya isa ga aikace-aikace da yawa, wanda aka ƙididdige shi azaman R = (Vsupply - VF) / IF, inda VF shine ƙarfin lantarki na gaba daga takardun bayanan (yi amfani da ƙimar matsakaici don ƙididdigar wutar juriya mafi muni). Don daidaitaccen haske a cikin bambancin zafin jiki ko watsawar wutar lantarki, ana ba da shawarar direba mai dindindin. Ƙimar ƙarfin lantarki na baya na 5V yana da ƙasa, don haka dole ne a kula da ƙirar da'ira don guje wa ƙarancin lantarki na baya.

8.2 Abubuwan Ƙira

Gudanar da Thermal:Ko da yake watsawar wutar lantarki yana da ƙasa, kiyaye ƙaramin zafin haɗin gwiwa shine mabuɗin dogon lokacin aminci da kwanciyar hankali na fitar da haske. Tabbatar da isasshen yankin tagulla na PCB ko ramukan zafi don zafin zafi idan ana aiki a manyan yanayin zafi ko kusa da matsakaicin igiyar ruwa.
Kariya ta ESD:Na'urar tana da hankali ga fitar da tashin hankali (ESD). Dole ne a yi amfani da ingantattun sarrafawa na ESD (bel ɗin wuyan hannu, tashoshi na aiki) yayin sarrafawa. Haɗa diodes na kariya na ESD akan PCB na iya zama dole a cikin yanayi masu hankali.
Ƙirar Gani:Kusurwar kallo na digiri 25 tana ba da haske mai mai da hankali. Don haske mai faɗi, ƙila ana buƙatar na'urori na gani na biyu kamar jagororin haske ko masu watsawa.

9. Kwatancen Fasaha da Bambance-bambance

Idan aka kwatanta da tsoffin LED na rawaya na GaP (Gallium Phosphide), fasahar AlInGaP tana ba da inganci mai girma sosai, wanda ke haifar da fitarwa mai haske sosai don irin wannan igiyar direba. Fakitin ruwan tabarau na dome yana ba da mafi kyawun fitar da haske da mafi daidaitaccen kusurwar kallo fiye da ƙira mai lebur ko yankakke. Dacewarsa da babban zafin jiki na IR reflow soldering ya bambanta shi da tsofaffin fakitin LED waɗanda kawai za su iya jure gyarar igiyar ruwa ko hanyoyin hannu, yana mai da shi cikakke ga layukan haɗa SMT na zamani.

10. Tambayoyin da ake yawan yi (Dangane da Ma'auni na Fasaha)

Q: Menene bambanci tsakanin tsayin tsayi da tsayin tsayin rinjaye?
A: Tsawon tsayi (λP) shine tsayin tsayi guda ɗaya wanda bakan fitarwa yake da matsakaicin ƙarfinsa. Tsawon tsayin rinjaye (λd) shine tsayin tsayi guda ɗaya wanda idon ɗan adam ya gane wanda ya dace da launin LED, wanda aka ƙididdige shi daga zanen launi na CIE. λP sau da yawa yana da mahimmanci don ƙayyadaddun launi.

Q: Zan iya tuka wannan LED a 30mA don ƙarin haske?
A: A'a. Matsakaicin matsakaicin igiyar gaba ta ci gaba ita ce 25mA. Wuce wannan ƙimar zai rage tsawon rayuwar LED kuma yana iya haifar da gazawa mai ban tsoro. Don mafi girman haske, zaɓi LED daga kwandon shara mafi girma na ƙarfin haske (kwandon Y) ko samfurin da aka ƙididdige shi don mafi girman igiyar ruwa.

Q: Me yasa yanayin ajiya bayan buɗewa yake da tsauri haka?
A> Kayan fakitin epoxy na iya ɗaukar danshi daga iska. A lokacin babban zafin jiki na aikin gyarar reflow, wannan danshin da aka kama zai iya yin tururi da sauri, yana haifar da matsa lamba na ciki wanda zai iya fashe fakitin (\"popcorning\"). Takamaiman yanayin ajiya da hanyoyin gasa suna hana wannan yanayin gazawa.

11: Nazarin Lamarin Aikace-aikace na Aiki

Yanayi: Hasken Baya don Membrane Keypad.Mai ƙira yana buƙatar haskaka maɓallai 12 daidai gwargwado akan na'urar likita ta hannu. Sun zaɓi LTST-C950KSKT a cikin kwandon shara na Y da kwandon shara na J don daidaitaccen launi. An sanya LED ɗaya a ƙarƙashin kowane maɓalli. An ƙera da'irar direba mai dindindin don ba da 20mA ga kowane LED, an tsara su a layi daya tare da masu saitin yanzu na mutum don lissafin ƙananan bambance-bambancen VF. Kusurwar kallo na digiri 25 ya isa haskaka kowane maɓalli ba tare da zubar da ruwa mai yawa ba. Ƙirar ta yi la'akari da ƙimar MSL 3 ta hanyar tsara haɗa allon nan da nan bayan an buɗe reel kuma ta ƙayyade gasa idan an yi jinkiri.

12. Gabatarwar Ka'idar Aiki

Fitar da haske a cikin wannan LED yana dogara ne akan electroluminescence a cikin haɗin gwiwar p-n semiconductor da aka yi da kayan AlInGaP. Lokacin da aka yi amfani da ƙarfin lantarki na gaba, electrons daga yankin n-type da ramuka daga yankin p-type ana shigar da su cikin yankin aiki. Lokacin da waɗannan masu ɗaukar caji suka sake haɗuwa, suna sakin makamashi a cikin nau'in photons (haske). Takamaiman abun da ke cikin gami na AlInGaP yana ƙayyade ƙarfin bandgap, wanda kai tsaye yayi daidai da tsayin tsayi (launi) na hasken da aka fitar—a wannan yanayin, rawaya (~588 nm). Ruwan tabarau na epoxy mai siffar dome yana aiki don kare guntu na semiconductor da ingantaccen fitar da hasken da aka samar daga babban abun ciki na semiconductor mai nuna haske zuwa iska.

13. Trends na Fasaha

Gabaɗayan yanayin a cikin LED na SMD yana zuwa ga inganci mafi girma (lumens mafi yawa a kowace watt), ingantaccen nuna launi, da ƙarfin ƙarfin wutar lantarki a cikin ƙananan fakitoci. Fasahar AlInGaP tana wakiltar cikakkiyar mafita mai inganci don bakan ja-lemu-rawaya-kore. Bincike mai gudana yana mai da hankali kan ƙarin riba ta hanyar ingantattun dabarun girma na epitaxial da ci-gaban ƙirar fakitin don mafi kyawun sarrafa zafi da fitar da haske. Haɗa LED tare da direbobi akan allon ko da'irar sarrafawa (\"smart LEDs\") kuma yana da girma, ko da yake wannan takamaiman ɓangaren ya kasance na'urar gani mai hankali, daidaitaccen haske.