Takardar Bayanin LED Fari LT3004WH-A-GL - Girma 3.0x0.85x0.42mm - Wutar Lantarki 3.0V - Ƙarfi 60mW

1. Taƙaitaccen Bayani na Samfur

LT3004WH-A-GL wani LED fari ne na saman-mount wanda aka kera don haskakawa gabaɗaya da kuma aikin backlight. Yana amfani da chip InGaN shuɗi tare da phosphor rawaya don samar da haske fari. Kunshin shine nau'in PLCC (Plastic Leaded Chip Carrier) mai girman 3.0mm × 0.85mm × 0.42mm, wanda ya dace da ƙira masu karami. Wannan LED yana da kusurwar gani mai faɗi 120°, haske mai girma har zuwa 3250mcd, da aminci na musamman. Ya bi ka'idar RoHS kuma yana da matakin hankali ga danshi 3. Babban amfani sun hada da haskakawa na LCD da haskakawa na wayar hannu.

2. Nazarin Sigogin Fasaha

2.1 Halayen Lantarki

A yanayin gwaji na IF=20mA da Ts=25°C, wutar gaba (VF) yawanci 3.0V ne tare da kewayon 2.7V zuwa 3.3V dangane da bin. Ruwan juyawa (IR) a VR=5V yana kasa da 1µA. Matsayin iyakar wutar gaba shine 30mA, kuma wutar gaba ta kololuwa (1/10 duty, 0.1ms pulse) shine 100mA. Matsayin iyakar wutar juyawa shine 5V. Matsayin ƙarfin wutar lantarki (HBM) shine 2000V. Zazzabi na haɗin LED (Tj) bai kamata ya wuce 105°C ba.

2.2 Halayen Gani

Hasken haske (Iv) a IF=20mA yawanci 2650mcd ne, yana daga 2150mcd zuwa 3450mcd dangane da bin. Kusurwar gani (2θ1/2) ita ce 120 digiri. Matsayin launi an ayyana su a cikin zane mai launi na CIE 1931, tare da rukunoni da yawa (N0 zuwa N4, M0 zuwa M4, da rukunin MN) don sarrafa launi daidai. Rarraba bakan yana nuna tsawon igiyar ruwa ta kololuwa kusan 450nm daga chip shuɗi da kuma fitowar rawaya mai faɗi daga phosphor, wanda ke haifar da haske fari.

2.3 Halayen Zafi

Dole ne a kiyaye zazzabi na haɗin LED kasa da 105°C. Lankwasa rage wutar gaba (Fig. 1-9) yana nuna cewa yayin da zazzabin solder ya tashi, iyakar wutar gaba da aka yarda tana raguwa don tabbatar da Tj ≤ 105°C. Gudanar da zafi mai kyau, kamar isasshen yanki na copper na PCB da heat sinking, yana da mahimmanci don aiki mai aminci.

3. Tsarin Binning

3.1 Binning na Hasken Haske

A IF=20mA, hasken haske an raba shi zuwa bins daga 30 zuwa 42, kowanne yana rufe kewayon 100mcd. Misali, bin 30 ya rufe 2150-2250mcd, bin 36 ya rufe 2750-2850mcd, kuma bin 42 ya rufe 3350-3450mcd. An kuma bayar da daidaitaccen haske (a lumens) ga kowane bin.

3.2 Binning na Wutar Gaba

An bin wutar gaba daga V0 (2.7-2.8V) zuwa V5 (3.2-3.3V) a matakan 0.1V. Duk ma'auni suna a IF=20mA, Ta=25°C, tare da haƙuri ±0.03V.

3.3 Binning na Launi

An raba ma'aunin launi na CIE 1931 zuwa rukunoni da yawa (N0 zuwa N4, M0 zuwa M4, da rukunin MN) don daidaiton launi. Kowanne rukuni yana ayyana ƙaramin yanki mai rectangular a cikin zanen launi, yana tabbatar da tsananin sarrafa launi don aikace-aikacen backlight da nuni.

4. Lankwasa Aiki

4.1 Wutar Gaba da Wutar Gaba (Fig. 1-7)

Lankwasa VF-IF tana nuna halayen diode na exponential. A 20mA, VF kusan 3.0V ne. Lankwasa tana taimaka wa masu zane tsinkayar faduwar wutar a yanayin wutar daban-daban.

4.2 Wutar Gaba da Hasken Dangi (Fig. 1-8)

Hasken haske na dangi yana ƙaruwa kusan mizani tare da wutar gaba har zuwa 50mA. Wannan mizani yana da amfani ga aikace-aikacen dimming.

4.3 Rarraba Bakan (Fig. 1-10)

Rarraba ƙarfin bakan yana nuna kololuwar shuɗi a kusan 450nm da kuma fitowar rawaya mai faɗi daga 500nm zuwa 700nm. Hasken fari yana da babban ma'aunin launi wanda ya dace da haskakawa gabaɗaya.

5. Bayanin Injiniya da Marufi

5.1 Girman Kunshin

LED yana da kunshin PLCC mai girman 3.0mm × 0.85mm × 0.42mm. Haƙuri shine ±0.1mm sai dai in an faɗi akasin haka. Kunshin yana da ruwan tabarau na silicone a sama, wanda yake taushi kuma yana buƙatar kulawa.

5.2 Girman Teip na Daukar

Ana ba da LEDs akan teip mai faɗi 12mm tare da aljihu A0=0.95mm, B0=3.15mm, K0=0.55mm. Fili P1=4.00mm, P2=2.00mm, P0=4.00mm. Diamita na reel shine 178mm tare da 5000pcs kowane reel.

5.3 Polarity da Alamar

LED yana da alamar cathode (yawanci tsintsiya ko digo) a gefe ɗaya. Kalli zane na kunshin don fahimtar polarity.

6. Jagorar Soldering da Hade

6.1 Bayanin Soldering Reflow

Tsarin soldering reflow da ake ba da shawara yana bin ka'idojin JEDEC: preheat daga 160°C zuwa 260°C a cikin 60-120 seconds; lokaci sama da 217°C (TL) yakamata ya kasance 60-120 seconds; kololuwar zazzabi 260°C na awanni 10 mafi girma (a cikin 5°C na kololuwa). Saurin sanyaya bai kamata ya wuce 6°C/s ba. Jimlar lokaci daga 25°C zuwa kololuwa yakamata ya zama kasa da mintuna 8. Kada a yi fiye da wucewa biyu na reflow, kuma idan tazara tsakanin wucewa ta wuce sa'o'i 24, ana iya lalata LEDs saboda shan danshi.

6.2 Soldering da Hannu

Don soldering da hannu, zazzabin ƙarfe dole ne ya zama kasa da 300°C, kuma lokacin tuntuɓar yakamata ya zama kasa da sakan 3. An yarda da aikin soldering da hannu guda ɗaya kawai.

6.3 Kulawa da Adanawa

Matsayin hankali ga danshi shine 3. Kafin bude jakar da aka rufe, yanayin adanawa: ≤30°C, ≤75% RH, rayuwar shiryayye shekara 1 daga ranar rufewa. Bayan bude, dole ne a yi amfani da LEDs a cikin sa'o'i 24 (≤30°C, ≤60% RH). Idan yanayin adanawa ya wuce ko kuma desiccant ya ɓace, ana buƙatar toya a 60±5°C na ≥24 hours.

6.4 Tsare-tsare na Kulawa

Ka guji yin matsin lamba na injiniya a kan ruwan tabarau na silicone yayin pick-and-place. Yi amfani da nozzles vacuum tare da ƙarfin da ya dace. Kada ka karkatar da PCB bayan soldering. Ka guji tsaftacewa da ultrasonic wanda zai iya lalata LED. Yi amfani da isopropyl alcohol don tsaftacewa idan an buƙata.

7. Marufi da Oda

7.1 Cikakkun Bayanai na Marufi

Kowane reel yana ƙunshe da guda 5000. Diamita na reel shine 178mm, faɗi 12.8mm. Teip na daukar an rufe shi da teip na rufe. Bayanin da aka lakanta ya haɗa da lambar sashi, lambar bin, hasken haske (Iv), wutar gaba (VF), lambar tsawon igiyar ruwa (WL), yawa, lambar kwanan wata, da lambar lot.

7.2 Marufi Mai Kariya daga Danshi

Ana rufe reels a cikin jakar da ke hana danshi tare da desiccant da katin nuna zafi. Sannan ana sanya jakar a cikin akwati na kwali.

7.3 Bayanin Oda

Abokan ciniki yakamata su ayyana lambobin bin da suke so don hasken haske, wutar gaba, da launi lokacin yin oda. Samfurin daidaitacce shine LT3004WH-A-GL.

8. Shawarwarin Aikace-aikace

LT3004WH-A-GL ya dace da haskakawa na LCD (musamman ƙarami zuwa matsakaici), haskakawa na maɓallin waya da nuni, fitilun alama, da haskakawa na ado. Girman sa mai ƙarami yana ba da damar hawa mai yawa. Don haskakawa daidai, ana iya amfani da LEDs da yawa a cikin layi tare da masu watsawa masu dacewa. Faɗin kusurwar gani 120° yana ba da haske mai kyau daga gefe. A cikin zane na kewayawa, resistor mai iyakance wutar yana da mahimmanci don hana wutar da yawa. Don dimming, ana ba da shawara ta PWM (pulse width modulation) a mitar sama da 1kHz don guje wa kyalkyali. Lokacin amfani da LED a cikin layuka/parallel, tabbatar da daidaitaccen rarraba wutar ta amfani da resistors na ballast ko direbobin wutar na yau da kullun.

9. Gwajin Aminci da Ma'aunin Rashin Aiki

LED ya ci gwaje-gwajen aminci ciki har da soldering reflow (260°C max, 10s), girgizar zafi (-40°C zuwa 100°C, 100 cycles), adanawa a babban zazzabi (100°C, 1000h), adanawa a ƙananan zazzabi (-40°C, 1000h), gwajin rayuwa (Ta=25°C, IF=20mA, 1000h), adanawa a babban zazzabi/danshi (60°C/90%RH, 1000h), da aiki a babban zazzabi/danshi (60°C/90%RH, IF=15mA, 500h). Matsayin karbuwa shine 0 gazawa cikin 20 samfurori ga kowane gwaji. An ayyana gazawa a matsayin VF > USL×1.1, IR > USL×2.0, ko haske<< LSL×0.7.

10. Tambayoyin da ake yawan yi

Tambaya1: Menene wutar gaba na yau da kullun a 20mA?Amsa: Yawanci 3.0V, tare da kewayon bin 2.7V-3.3V.

Tambaya2: Zan iya tuka LED a 30mA akai?Amsa: Ee, 30mA shine iyakar wutar gaba, amma ana buƙatar kulawar zafi sosai don kiyaye zazzabin haɗi kasa da 105°C. Don tsawon rayuwa, yi la'akari da rage zuwa 20mA.

Tambaya3: Yaya zan zaɓi bin da ya dace don aikace-aikace na?Amsa: Zaɓi bin na hasken haske gwargwadon hasken da ake buƙata, bin na wutar gwargwadon wutar direba, da bin na launi don daidaiton launi. Aikace-aikacen backlight na yau da kullun suna amfani da bins a cikin rukunin N ko M.

Tambaya4: Za a iya amfani da LED a waje?Amsa: Kewayon zazzabin aiki shine -30°C zuwa +85°C, amma rufin silicone na iya lalacewa idan an fallasa shi da hasken UV na dogon lokaci. Don amfani a waje, tabbatar da kariya daga hasken rana kai tsaye da danshi.

11. Nazarin Shaida na Zane

Shaida: Haskakawa LCD don Nuni 7-inchNuni 7-inch yana buƙatar haskakawa daidai da haske na 300cd/m². Yin amfani da guda 30 na LT3004WH-A-GL da aka shirya a layuka 5 × ginshiƙai 6, kowanne ana tukawa a 20mA, jimlar wutar shine 600mA. Tare da farantin haske da diffuser, tsarin zai iya cimma hasken da ake buƙata. Wutar gaba kowane LED kusan 3.0V ne, don haka wutar lantarki 12V tare da resistors a jere (misali, 330Ω kowane layi na LEDs 6) zai yi aiki. Layout na PCB yakamata ya haɗa da thermal vias don watsar da zafi. Gwajin aminci ya tabbatar da cewa LEDs suna kiyaye >90% na haske bayan awanni 10,000 a yanayin zafi 25°C.

12. Ka'idar Aiki

LED fari yana amfani da semiconductor chip InGaN (indium gallium nitride) mai fitar da shuɗi. Lokacin da wutar gaba ta wuce ta chip, electrons da holes suna haɗuwa radiatively, suna fitar da haske shuɗi (kololuwa ~450nm). Wannan haske shuɗi wani ɓangare yana motsa phosphor rawaya (yawanci YAG:Ce) da aka shafa akan chip. Haɗin haske shuɗi da fitowar phosphor rawaya yana haifar da haske fari. Daidaitaccen zazzabin launi da ma'aunin launi sun dogara da abun da ke ciki na phosphor da kauri. Kunshin PLCC yana ba da kariya ta injiniya da rami mai haske don cire haske mai inganci.

13. Hanyoyin Fasaha

Masana'antar LED tana motsawa zuwa mafi inganci (lumens per watt), ƙananan kunshin (misali, 1.6x0.8mm chip-scale packages), da mafi kyawun daidaiton launi (binning mai kunkuntar). LT3004WH-A-GL yana wakiltar mafita na PLCC mai ƙarami mai kyau aiki don aikace-aikacen yanzu. Hanyoyin gaba sun haɗa da haɗa LEDs da yawa a cikin kunshin guda ɗaya (misali, RGB fari), ingantaccen sarrafa zafi, da amfani da quantum dots don inganta gamut na launi. Don haskakawa, fasahar mini-LED da micro-LED suna fitowa, amma LEDs na PLCC suna da tsada mai inganci don samfuran matsakaicin yawa.