Takardun Bayani na Fasaha na LTW-270TLA SMD LED - Duba daga gefe - Haske Fari - 10mA - 3.4V Matsakaici - Takardun Fasaha na Turanci

1. Bayyani Game da Samfur

LTW-270TLA na'urar haɗawa ta saman (SMD) ce ta fitar da haske (LED) wacce aka ƙera ta musamman don aikace-aikacen hasken fitarwa daga gefe. Manufarta ta farko ita ce ta zama tushen hasken baya don allunan nuni na ruwa mai ruwa (LCD), inda ake buƙatar shigar da haske a gefen farantin jagorar haske. Na'urar tana amfani da kayan semiconductor na InGaN (Indium Gallium Nitride) don samar da haske fari. An tattara shi a cikin daidaitaccen tsarin EIA, ana ba da shi akan tef na 8mm da aka ɗora akan reels masu diamita 7-inch, yana sa ya dace da kayan aikin haɗawa ta atomatik mai sauri da daidaitattun hanyoyin gudanar da solder infrared (IR). Samfurin ya bi ka'idojin RoHS (Ƙuntata Abubuwa masu haɗari), yana rarraba shi azaman samfurin kore.

2. Zurfin Bincike na Ma'auni na Fasaha

2.1 Matsakaicin Matsakaicin Matsayi

Waɗannan ƙididdiga suna bayyana iyakokin damuwa waɗanda za su iya haifar da lalacewa na dindindin ga na'urar. Ba a ba da garantin aiki a ƙarƙashin ko a waɗannan iyakokin ba. Ma'auni masu mahimmanci sun haɗa da matsakaicin ɓarnawar wutar lantarki na 70 mW a yanayin zafin yanayi (Ta) na 25°C. Matsakaicin halin yanzu na gaba na DC shine 20 mA. Don aikin bugun jini, matsakaicin halin yanzu na gaba na 100 mA yana yiwuwa a ƙarƙashin takamaiman yanayi: zagayowar aiki na 1/10 da faɗin bugun jini na 0.1 ms. Na'urar na iya jure matsakaicin ƙarfin lantarki na baya na 5V, amma an haramta ci gaba da aiki a ƙarƙashin karkatar da baya. Matsakaicin zafin aiki daga -20°C zuwa +80°C, yayin da kewayon zafin ajiya ya fi girma, daga -55°C zuwa +105°C. Ma'auni mai mahimmanci don haɗawa shine yanayin solder na infrared, wanda bai kamata ya wuce 260°C na dakika 10 ba.

2.2 Halayen Lantarki & Na Gani

Waɗannan su ne ma'auni na ayyuka na yau da kullun da aka auna a Ta=25°C da halin yanzu na gaba (IF) na 10 mA, wanda shine daidaitaccen yanayin gwaji. Ƙarfin haske (Iv) yana da mafi ƙarancin 45 mcd kuma matsakaicin matsakaici na 180 mcd. Kusurwar kallo (2θ1/2) tana da faɗi sosai, yawanci digiri 130, wanda yake da amfani don samun daidaitaccen hasken baya. Ƙarfin lantarki na gaba (VF) ya bambanta daga mafi ƙarancin 2.8V zuwa matsakaicin 3.4V a halin yanzu na gwaji. Halin yanzu na baya (IR) yana da ƙasa sosai, tare da matsakaicin 10 μA lokacin da aka yi amfani da ƙarfin lantarki na baya (VR) na 5V. Ma'auni masu launi, waɗanda ke bayyana launin farin farin akan zane na CIE 1931, yawanci x=0.31 da y=0.32. Yana da mahimmanci a lura cewa ya kamata a yi amfani da jurewar ±0.01 ga waɗannan ma'auni masu launi. Ya zama dole a kiyaye matakan kariya na fitar da lantarki mai tsauri (ESD), kamar amfani da bel ɗin wuyan da aka kafa, yayin sarrafawa don hana lalacewa.

3. Bayanin Tsarin Binning

Don tabbatar da daidaito a cikin samar da yawa, ana rarraba LEDs zuwa kwandon aiki. LTW-270TLA yana amfani da tsarin binning mai girma uku wanda ya ƙunshi Ƙarfin Lantarki na Gaba (VF), Ƙarfin Hasken Hasken (IV), da Hue (ma'auni masu launi).

3.1 Binning na Ƙarfin Lantarki na Gaba (VF)

Ana rarraba LEDs zuwa kwandon VF guda uku (2, 3, 4) dangane da raguwar ƙarfin lantarki a IF=10 mA. Kwandon 2 ya ƙunshi 2.80V zuwa 3.00V, Kwandon 3 ya ƙunshi 3.00V zuwa 3.20V, kuma Kwandon 4 ya ƙunshi 3.20V zuwa 3.40V. Ana amfani da jurewar ±0.1V ga kowane kwandon.

3.2 Binning na Ƙarfin Hasken Hasken (IV)

Ana rarraba fitar da haske zuwa rukuni uku: P (45.0-71.0 mcd), Q (71.0-112.0 mcd), da R (112.0-180.0 mcd). Jurewar ±15% ya shafi kowane kwandon ƙarfi.

3.3 Hue (Launi) Binning

Ana sarrafa ma'anar launin fari daidai ta hanyar kwandon hue da aka ayyana akan zane na launi na CIE 1931. Kwandon da aka ƙayyade sune A0, B3, B4, B5, B6, da C0, kowanne yana wakiltar takamaiman yanki mai siffa huɗu akan jirgin saman x,y. Jurewar ±0.01 ya shafi ma'auni a cikin kowane kwandon. Wannan tsarin yana ba masu zane damar zaɓar LEDs tare da halayen launi masu dacewa don aikace-aikacen da ke buƙatar kamannin farin farin.

4. Bayanin Injiniya & Marufi

4.1 Girman Kunshin

LED yana zuwa a cikin daidaitaccen kunshin SMD. Cikakken zanen injiniya yana nuna duk mahimman girma, gami da tsawon jiki, faɗi, tsayi, da sanya alamar cathode. Duk girma suna cikin milimita, tare da daidaitaccen jurewar ±0.10 mm sai dai idan an faɗi akasin haka. Geometry na ruwan tabarau mai duban gefe shine babban fasali wanda ke jagorantar fitar da haske daidai da jirgin saman ɗora.

4.2 Kunshin Tef da Reel

Ana ba da abubuwan da aka haɗa akan tef ɗin mai ɗaukar kaya mai faɗin 8mm. Ana jujjuya tef ɗin akan daidaitaccen reel mai diamita 7-inch (178mm). Kowane reel yana ƙunshe da guda 4000. Marufi yana bin ƙayyadaddun ANSI/EIA 481-1-A-1994. Muhimman bayanan sun haɗa da: ana rufe aljihun fanko da tef ɗin murfi, ana karɓar mafi ƙarancin adadin oda na guda 500 don ragowar, kuma ana ba da izinin mafi ƙarancin abubuwan da suka ɓace guda biyu a jere a kowane reel.

4.3 Shafin Ƙirar Ƙirar Solder & Polarity

An ba da shafin ƙasa da aka ba da shawarar (sawun gindin solder) don ƙirar PCB don tabbatar da ingantaccen solder da daidaitaccen daidaitawar injiniya. Takardar kuma tana nuna shugabanci na solder da aka ba da shawarar dangane da ciyarwar tef don inganta tsarin sanyawa. Bayyanannen alamar polarity (ganewar cathode) akan kayan dole ne a dace da madaidaicin gindin akan PCB.

5. Jagororin Solder & Haɗawa

5.1 Bayanin Siffar Solder Reflow

An ba da cikakken shawarar bayanin martabar reflow na infrared. Ma'auni masu mahimmanci sun haɗa da zafin jiki na farko tsakanin 150°C da 200°C, lokacin dumama na farko har zuwa dakika 120 matsakaici, matsakaicin zafin jiki bai wuce 260°C ba, da kuma lokacin a wannan matsakaicin zafin jiki an iyakance shi zuwa dakika 10 matsakaici. Kada a sanya LED sama da zagayowar reflow biyu a ƙarƙashin waɗannan yanayi. An jaddada cewa mafi kyawun bayanin martaba ya dogara da takamaiman ƙirar PCB, manna solder, da tanda, don haka ana ba da shawarar siffanta matakin allon.

5.2 Solder da Hannu

Idan solder da hannu ya zama dole, ya kamata a yi shi tare da zafin ƙarshen guntun solder bai wuce 300°C ba. Dole ne a iyakance lokacin tuntuɓar kowane jagora zuwa matsakaicin dakika 3, kuma wannan ya kamata a yi shi sau ɗaya kawai.

5.3 Tsaftacewa

Tsaftacewa bayan solder ya kamata a yi shi kawai idan ya cancanta. Kayan aikin da aka ƙayyade kawai za a yi amfani da su: ana ba da shawarar nutsar da cikin barasa na ethyl ko isopropyl a yanayin zafi na yau da kullun na ƙasa da minti ɗaya. Yin amfani da ruwayen sinadarai da ba a bayyana ba na iya lalata kunshin LED.

6. Ajiya & Sarrafawa

Marufi da ba a buɗe ba:LEDs a cikin jakar shinge na rigakafin danshi na asali (tare da desiccant) yakamata a adana su a 30°C ko ƙasa da kuma 90% danshi na dangi ko ƙasa da haka. Tsawon rayuwa a ƙarƙashin waɗannan yanayi shine shekara ɗaya.
Marufi da aka buɗe:Da zarar an buɗe jakar shinge na danshi, yanayin ajiya bai kamata ya wuce 30°C da 60% danshi na dangi ba. Ana ba da shawarar sosai don kammala tsarin reflow na IR cikin mako ɗaya na buɗewa. Don ajiya fiye da mako ɗaya, yakamata a sanya LEDs a cikin akwati mai rufi tare da desiccant ko a cikin desiccator na nitrogen. Idan an adana shi daga jakar asali fiye da mako guda, ana buƙatar gasa a kusan 60°C na aƙalla sa'o'i 20 kafin solder don cire danshin da aka sha da hana lalacewar \"popcorning\" yayin reflow.

7. Bayanan Aikace-aikace & Abubuwan Ƙira

7.1 Aikace-aikacen Manufa

Aikace-aikacen farko na LTW-270TLA shine azaman tushen haske mai harbin gefe a cikin raka'o'in hasken baya na LCD (BLUs). Faɗin kusurwar kallonsa yana taimakawa rarraba haske daidai zuwa gefen farantin jagorar haske. Ya dace da kayan aikin lantarki na yau da kullun ciki har da na'urori na sarrafa ofis, kayan aikin sadarwa, da kayan amfanin gida.

7.2 Ƙirar Kewayawa

Resistor mai iyakancewa yana da mahimmanci lokacin tuƙi LED daga tushen ƙarfin lantarki don saita halin yanzu na gaba da ake so (misali, 10 mA don gwaji, har zuwa 20 mA matsakaicin DC). Ana iya ƙididdige ƙimar resistor ta amfani da Dokar Ohm: R = (V_source - VF_LED) / I_LED. Ƙarfin lantarki na gaba (VF) da aka yi amfani da shi a cikin lissafin ya kamata ya zama matsakaicin ƙimar daga takardun bayani (3.4V) ko daidaitaccen ƙimar kwandon don tabbatar da cewa halin yanzu bai taɓa wuce matsakaicin matsakaicin matsakaicin ba a ƙarƙashin mafi munin yanayi.

7.3 Gudanar da Zafi

Duk da yake na'urar da kanta tana da ƙarancin amfani da wutar lantarki, ingantaccen ƙirar zafi akan PCB yana da mahimmanci har yanzu don dogon lokacin amincin, musamman lokacin aiki a yanayin zafi mai girma ko kusa da matsakaicin halin yanzu. Factor ɗin rage ƙimar halin yanzu na gaba na DC shine 0.25 mA/°C sama da 25°C. Wannan yana nufin halin yanzu na ci gaba da raguwa yana raguwa a layi daya yayin da yanayin yanayi ke ƙaruwa. Tabbatar da isasshen yankin tagulla a kusa da gindin solder na iya taimakawa wajen tarwatsa zafi.

8. Kwatancen Fasaha & Jagorar Zaɓi

Babban abin banbance na LTW-270TLA shine geometry na ruwan tabarau mai duban gefe, wanda ya bambanta da LEDs na sama. Lokacin zaɓar LED don hasken baya mai haske, nau'in duban gefe ya zama dole. Dole ne masu zane su kwatanta ma'auni kamar ƙarfin haske (don cimma haske da ake nema), kusurwar kallo (don daidaito), ƙarfin lantarki na gaba (don ƙirar direba da ingancin wutar lantarki), da kwandon launi (don daidaiton launi a cikin LEDs da yawa). Faɗin kusurwar kallo na digiri 130 babbar fa'ida ce don hasken baya. Cikakken tsarin binning yana ba da damar daidaitawa daidai na halayen lantarki da na gani a cikin jeri, wanda ke da mahimmanci don hana bayyanannun haske ko gradients na launi a cikin nuni na ƙarshe.

9. Tambayoyin da ake yawan yi (FAQ)

Q: Menene bambanci tsakanin ƙimar \"Typical\" da \"Max/Min\" a cikin teburin halaye?
A: \"Typical\" yana wakiltar matsakaicin ƙimar da ake tsammani a ƙarƙashin daidaitattun yanayin gwaji. \"Min\" da \"Max\" suna bayyana iyakokin ayyukan da aka garantar don duk na'urori; kowane naúrar za ta sami ƙimar ma'auni tsakanin ƙayyadaddun min da max.

Q: Zan iya tuƙi wannan LED tare da tushen ƙarfin lantarki na dindindin?
A: A'a. LEDs na'urori ne masu tuƙi na halin yanzu. Ƙarfin lantarki na gaba yana da jurewa kuma yana bambanta da zafin jiki. Tuki tare da ƙarfin lantarki na dindindin (ko da \"typical\" VF) na iya haifar da wuce gona da iri na halin yanzu da gazawar sauri. Koyaushe yi amfani da direba na halin yanzu na dindindin ko tushen ƙarfin lantarki tare da resistor mai iyakancewa na jerin.

Q: Me ya sa lambar kwandon ke da mahimmanci?
A: Lambar kwandon (misali, don VF, IV, Hue) tana gaya muku takamaiman rukunin ayyukan LED. Don samarwa, yin odar LEDs daga kwandon ɗaya yana tabbatar da daidaitaccen haske, launi, da amfani da wutar lantarki a cikin duk raka'o'in a cikin samfurin ku, wanda ke da mahimmanci don inganci.

Q: Ta yaya zan fassara zanen launi da kwandon?
A: Zanen CIE 1931 yana taswirar duk launuka masu iya fahimta. Ma'auni (x,y) suna nuna ma'anar farin LED. Kwandon (A0, B3, da sauransu) sune yankunan da aka riga aka ayyana akan wannan taswirar. LEDs daga kwandon ɗaya za su fitar da haske mai kama da farin launi (misali, farin sanyi, farin tsaka-tsaki).

10. Ka'idojin Aiki & Fasaha

LTW-270TLAN ya dogara ne akan fasahar semiconductor na InGaN. Lokacin da aka yi amfani da ƙarfin lantarki na gaba wanda ya wuce yuwuwar haɗin diode, electrons da ramuka suna sake haɗuwa a cikin yanki mai aiki na semiconductor, suna sakin makamashi a cikin nau'in photons (haske). Takamaiman abun da ke cikin yadudduka na InGaN yana ƙayyade tsawon zangon hasken da aka fitar. Don samar da haske fari daga semiconductor wanda ke fitar da haske shuɗi, yawanci ana shafa murfin phosphor akan guntuwar LED shuɗi. Wani ɓangare na hasken shuɗi yana canza shi ta hanyar phosphor zuwa tsayin zango (rawaya, ja), kuma cakuda shuɗi da hasken da aka canza idon ɗan adam yana ganinsa a matsayin fari. Kunshin duban gefe ya haɗa da ruwan tabarau da aka ƙera wanda ke siffata da jagorantar wannan hasken da aka fitar a gefe.