SMD LED LTST-N683GBEW Datasheet - Tricolor (Red/Green/Blue) - 20mA/30mA Forward Current - 80mW Power Dissipation - Technical Documentation

1. Muhtasari wa Bidhaa

This document provides the complete technical specifications for the LTST-N683GBEW. This device is a surface-mount device (SMD) LED, designed for automated printed circuit board (PCB) assembly and suitable for space-constrained applications. It is a multi-color LED package that integrates independent red, green, and blue LED chips within a single housing, enabling flexible color indication or potential color-mixing applications.

1.1 Features

• Compliant with the RoHS (Restriction of Hazardous Substances) Directive.
• Packaged in 8mm carrier tape, with a reel diameter of 7 inches, suitable for automated pick-and-place machines.
• Standard EIA (Electronic Industries Alliance) package dimensions.
• Compatible with IC (Integrated Circuit) logic levels.
• Fully compatible with standard automated placement equipment used in high-volume manufacturing.
• Designed to withstand the infrared (IR) reflow soldering process common in SMT (Surface Mount Technology) assembly lines.
• Preconditioned to accelerate attainment of JEDEC (Joint Electron Device Engineering Council) Moisture Sensitivity Level 3, which means a floor life of 168 hours at ≤30°C/60% RH after the dry pack is opened.

1.2 Applications

The LTST-N683GBEW is designed for a wide range of electronic equipment requiring reliable multi-color status indication in a compact form factor. Typical application areas include:

• Telecommunications equipment:Viashiria vya hali katika simu zisizo na waya, simu za mkononi, vichocheo na swichi za mtandao.
• Vifaa vya Automatiki ya Ofisi:Taa za nyuma au taa za hali kwenye vitufe vya printa, vichanganuzi na vifaa vya kazi nyingi.
• Vifaa vya Matumizi ya Kaya na Vifaa vya Umeme:Viashiria vya umeme, hali au utendaji katika vifaa vya sauti na video, vifaa vya jikoni na vifaa vya nyumba zenye akili.
• Vifaa vya Viwanda:Viashiria vya jopo kwenye mashine, mifumo ya udhibiti na vifaa vya majaribio.
• Ishara na Maonyesho ya Ndani:Low-resolution information displays, decorative lighting, and signage backlighting.

2. Technical Parameters: In-depth and Objective Interpretation

This section provides a detailed and objective analysis of the LED's key performance parameters based on the datasheet.

2.1 Absolute Maximum Ratings

These ratings define the limits that may cause permanent damage to the device. Operation under these conditions is not guaranteed and should be avoided in circuit design.

• Power Dissipation (Pd):Chip ya bluu na kijani ina nguvu ya 80 mW; chip ya nyekundu ina nguvu ya 72 mW. Kigezo hiki ni muhimu sana katika usimamizi wa joto, na huathiri moja kwa moja mkondo wa juu unaoruhusiwa wa mbele chini ya hali ya DC.
• Mkondo wa kilele wa mbele (I_F(PEAK)):Bluu/kijani ni 100 mA, nyekundu ni 80 mA, uwiano wa wakati wa kazi 1/10, upana wa msukumo 0.1ms. Kadirio hii inatumika tu kwa hali ya kazi ya msukumo, na ni kubwa zaidi kuliko kadirio la DC.
• Mkondo wa mbele wa DC (I_F):Mkondo unaopendekezwa wa kazi endelevu kwa LED ya bluu na kijani ni 20 mA, na kwa LED ya nyekundu ni 30 mA. Kuzidi thamani hii kutaongeza joto la kiungo na kuharakisha kupungua kwa mwangaza.
• Joto la kufanya kazi na la uhifadhi:Anuwai ya joto la mazingira lililokadiriwa kwa kifaa (T_a) ni kutoka -40°C hadi +85°C. Anuwai ya joto la uhifadhi ni pana zaidi, kutoka -40°C hadi +100°C.

2.2 Electrical and Optical Characteristics

These are typical performance parameters measured at an ambient temperature of 25°C and a forward current of 20mA, unless otherwise specified.

• Luminous Intensity (I_V):Measured in millicandelas (mcd). The green LED is the brightest (710-1400 mcd, min-max), followed by red (355-710 mcd), then blue (180-355 mcd). Intensity measurement uses a filter approximating the CIE photopic response curve.
• Viewing Angle (2θ_1/2):The typical full viewing angle is 120 degrees. This is the angle at which the luminous intensity drops to half of its axial (on-axis) value. A 120-degree angle indicates a broad, diffuse emission pattern, suitable for status indication.
• Wavelength Parameters:
  • Peak wavelength (λ_P):The wavelength at which the spectral power distribution reaches its maximum. Typical values are 468 nm (blue), 518 nm (green), and 632 nm (red).
  • Dominant wavelength (λ_d):The single wavelength perceived by the human eye that defines the color. Typical ranges are 465-475 nm (blue), 520-530 nm (green), and 617-630 nm (red).
  • Spectral line half-width (Δλ):The bandwidth where the emitted light intensity drops to half of its peak value. Typical values are 25 nm (blue), 35 nm (green), and 20 nm (red), indicating a relatively narrow emission bandwidth for each color.
• Forward voltage (V_F):The voltage drop across the LED at a specified current. The range is 2.8-3.8V for blue/green and 1.8-2.6V for red. The V_Fis lower for red, which is a characteristic of the AlInGaP material compared to the InGaN material used for blue/green.
• Reverse current (I_R):when a 5V reverse voltage (V_RWakati, mkondo wa kuvuja mkubwa ni 10 μA.Maelezo Muhimu:Uainishaji unabainisha wazi kifaa hiki hakikusudiwa kufanya kazi kinyume; jaribio hili linatumika tu kwa uthibitishaji wa infrared (IR).

3. Binning System Description

Ili kuhakikisha uthabiti wa rangi na mwangaza katika uzalishaji, LED hupangwa katika "vipimo" tofauti kulingana na vigezo vilivyopimwa. LTST-N683GBEW hutumia mfumo wa kugawanya wa pande mbili kwa nguvu ya mwanga na urefu wa wimbi kuu.

3.1 Kugawanya Nguvu ya Mwanga (I_V)

Kila rangi ina kiwango maalum cha nguvu, na kila kiwango kina uvumilivu wa 11%.

• Blå ljus:Ställningar S1 (180-224 mcd), S2 (224-280 mcd), T1 (280-355 mcd).
• Grönt ljus:Ställningar V1 (710-900 mcd), V2 (900-1120 mcd), W1 (1120-1400 mcd).
• Rött ljus:Ställningar T2 (355-450 mcd), U1 (450-560 mcd), U2 (560-710 mcd).

3.2 Dominant våglängd (λ_d)

Varje färg har specifika våglängdsställningar med en tolerans på +/- 1nm.

• Blå ljus:Bins AC1 (465.0-467.5 nm), AC2 (467.5-470.0 nm), AD1 (470.0-472.5 nm), AD2 (472.5-475.0 nm).
• Grönt ljus:Bins AP1 (520.0-522.5 nm), AP2 (522.5-525.0 nm), AQ1 (525.0-527.5 nm), AQ2 (527.5-530.0 nm).
• Rött ljus:The dominant wavelength of the red LED is specified as a single range (617-630 nm) in the wavelength table, with no sub-bins.

3.3 Combined Bin Code on Label

The datasheet provides a cross-reference table that combines the intensity bin and (for blue/green) the wavelength bin into a single alphanumeric "Label Bin Code". This code is printed on the product reel or packaging, allowing manufacturers to select LEDs with closely matched performance characteristics for their application. For example, code "C4" corresponds to a blue LED with intensity bin T1, a green LED with intensity bin V2, and a red LED with intensity bin T2.

4. Performance Curve Analysis

Although the datasheet references specific graphical data (e.g., Figure 1, Figure 6), typical curves for such LEDs include:

• I-V (Current-Voltage) curve:It shows the nonlinear relationship between forward current and forward voltage. The curve will have a distinct "knee" voltage (approximately the minimum V_F), below which almost no current flows. It is recommended to drive the LED with a constant current source to ensure stable light output regardless of V_F variations.
• How it changes, the light output remains stable._VLuminous Intensity vs. Forward Current (I_Fvs. I):
• Within the normal operating range, light output typically increases linearly with current, but saturates at very high currents due to thermal effects and efficiency droop._VLuminous Intensity vs. Ambient Temperature (I_avs. T):
• Light output typically decreases as the junction temperature increases. The rate of decrease varies with semiconductor material (AlInGaP used for red light is generally more temperature-sensitive than InGaN used for blue/green light).Usambazaji wa wigo:

Graph of relative radiant power versus wavelength, showing the characteristic peak and FWHM for each color chip.

5. Mechanical and Packaging Information

5.1 Vipimo vya Ufungaji na Usambazaji wa Pini

• LED hutumia ufungaji wa kawaida wa SMD. Vipimo muhimu vya uvumilivu ni ±0.2 mm, isipokuwa ikitajwa vinginevyo. Usambazaji wa pini kwa ufungaji wa rangi nyingi umefafanuliwa wazi:
• Pini 1: Haijabainishwa katika dondoo iliyotolewa (kwa kawaida ni kathodi ya pamoja au haijaunganishwa).
• Pini 2: Anodi ya chip ya LED ya mwanga nyekundu (AlInGaP).
• Pini 3: Anodi ya chip ya LED ya mwanga wa bluu (InGaN).

Pini 4: Anodi ya chip ya LED ya mwanga wa kijani (InGaN).Maelezo Muhimu ya Ubunifu:

This type of package typically uses a common-cathode configuration, but the exact schematic must be obtained by consulting the datasheet. Each anode must be driven independently through its own current-limiting resistor or constant-current driver.

5.2 Usanidi Unaopendekezwa wa Padi ya PCB

A land pattern (package dimension) diagram is provided to ensure proper solder joint formation and mechanical stability during and after reflow soldering. Following this recommended pattern is critical for reliable assembly.

6. Soldering and Assembly Guidelines

6.1 Mkunjo wa Joto wa Reflow ya Infrared

• Mwongozo una mkunjo wa joto wa reflow ya infrared unaopendekezwa unaolingana na kiwango cha J-STD-020B, unaofaa kwa mchakato wa ushonaji usio na risasi (Pb-free). Mkunjo huu kwa kawaida hufafanua vigezo muhimu:Kiwango cha joto cha kujipasha/joto la kupanda:
• Pasha joto polepole bodi ya mzunguko na vipengee, ili kupunguza mshtuko wa joto.Eneo la kudumisha joto:
• Uwanja wa joto, unaotumika kuamsha flux na kuhakikisha PCB inapashwa joto sawasawa.Reflow zone:
• Peak temperature must be high enough to melt the solder paste, but must not exceed the LED's maximum temperature tolerance (implied by its JEDEC Level 3 rating and storage temperature).Cooling rate:

Controlled cooling to form reliable solder joints.

6.2 Cleaning

Ikiwa usafishaji baada ya kuuzima unahitajika, safishaji pekee yenyewe inayopendekezwa ni ethanol au isopropanol. LED inapaswa kuzamishwa kwa chini ya dakika moja kwenye joto la kawaida. Kemikali zisizobainishwa za kusafisha zinaweza kuharibu lenzi ya plastiki au kifurushi cha LED.

6.3 Storage Conditions

Ili kudumisha uwezo wa kuuzima na uadilifu wa kifaa, LED zinapaswa kuhifadhiwa kwenye mfuko wao uliofungwa wa kuzuia unyevu, chini ya hali ya 30°C au chini, na unyevunyevu wa jamaa wa 70% au chini. Mara tu mfuko unapofunguliwa, "maisha ya kiwandani" kulingana na kiwango cha JEDEC MSL 3 yanatumika.

7. Ufungaji na Taarifa za Kuagiza

7.1 Vipimo vya Ukanda wa Kubeba na Reel

• Bidhaa hufungwa kwenye ukanda wa kubeba wa kiwango cha tasnia uliochapishwa kwa mfumo wa mabomba, kwa urahisi wa usindikaji wa otomatiki.Upana wa Ukanda wa Kubeba:
• 8 mm.Reel Diameter:
• 7 inches.Quantity per Reel:
• 2000 pieces.Minimum Order Quantity (MOQ):
• Remaining quantity is 500 pieces.

Ufungaji unalingana na vipimo vya ANSI/EIA-481. Mkanda wa kubeba una mkanda wa kufunika ili kufunga mifuko ya vipengele.

8. Mapendekezo ya Utumiaji na Mazingatio ya Ubunifu

8.1 Saketi ya Kawaida ya Utumizi_{Kila chipi ya LED (nyekundu, kijani, bluu) inahitaji saketi tofauti ya kudhibiti mkondo. Njia rahisi zaidi ni kuunganisha kipingamizi kwa mfululizo kwa kila anodi, na fomula ya kuhesabu ni R = (V}Chanzo cha Nguvu_F- V_F) / I_F. Ili kupata uthabiti bora chini ya mabadiliko ya joto na V

Ili kupata uthabiti bora chini ya mabadiliko, inashauriwa kutumia kiendeshi cha mkondo wa mara kwa mara (k.m., LED drive IC maalum au saketi inayotegemea transistor), hasa kwa LED nyekundu zenye mkondo mkubwa au hali ambazo mechi sahihi ya mwangaza ni muhimu.

8.2 Usimamizi wa Joto

Licha ya matumizi ya nguvu ya chini, muundo sahihi wa joto unaweza kuongeza maisha ya LED na kudumisha pato la mwanga thabiti. Hakikisha muundo wa pedi ya PCB unatoa utoaji wa joto wa kutosha kulingana na mapendekezo ya spec. Epuka kuendesha LED kwa muda mrefu chini ya viwango vya juu kabisa.

8.3 Muundo wa Optics

Pembe ya maono ya digrii 120 hutoa uwazi mpana. Kwa matumizi yanayohitaji boriti iliyolengwa zaidi, vifaa vya pili vya macho vya nje (lensi) vinaweza kutumika. Lensi za kutawanyisha husaidia kufikia muonekano sawa wakati wa kutazama mbali na mhimili.

9. Ulinganisho wa Kiufundi na Tofauti

• Sababu kuu ya kutofautisha kwa LTST-N683GBEW ni kuwa inaunganisha chips tatu tofauti za LED (nyekundu, kijani, bluu) ndani ya kifurushi kimoja cha SMD cha kompakt. Ikilinganishwa na kutumia LED tatu za rangi moja tofauti, hii inatoa faida kubwa:Kuokoa Nafasi:
• Kupunguza eneo linalochukuliwa na PCB na idadi ya vipengele.Rahisisha usanikishaji:
• Weka kipengele kimoja tu badala ya vitatu, ikiboresha ufanisi na uaminifu wa utengenezaji.Kielektroniki cha mwanga kilichopangwa mapema:
• Chipi ziko katika nafasi zisizobadilika kuhusiana na kila mmoja, jambo muhimu kwa matumizi yanayohitaji mchanganyiko wa rangi au mpangilio wa karibu wa taa za rangi nyingi.Ufungashaji thabiti:

Rangi zote tatu zina sifa za macho zilizounganishwa (upeo wa kuona, muonekano wa lenzi).

10. Maswali Yanayoulizwa Mara kwa Mara (kulingana na Vigezo vya Kiufundi)
Swali: Je, naweza kuendesha LED zote tatu kwa wakati mmoja kwa mkondo wa juu wa moja kwa moja?

Jibu: Hapana. Lazima uzingatie viwango vya matumizi ya nguvu (80/72 mW) na muundo wa joto wa kifurushi. Ikiwa voltage ya mbele iko kwenye mwisho wa juu wa anuwai yake, kuendesha LED zote tatu kwa wakati mmoja kwa mkondo wa juu (bluu/kijani 20mA + nyekundu 30mA) kunaweza kuzidi uwezo wa jumla wa joto wa kifurushi. Kwa matumizi ya rangi kamili na mwangaza kamili, kupunguza viwango au kutumia uendeshaji wa msukumo unapendekezwa.
Swali: Msimbo wa kiwango kwenye lebo unamaanisha nini kwa muundo wangu?

Jibu: Kwa matumizi ambayo thabiti ya rangi au mwangaza ni muhimu (kwa mfano, jopo la vifaa vingi, onyesho), unapaswa kubainisha na kutumia LED zenye msimbo wa kiwango sawa. Hii inahakikisha tofauti ndogo kati ya vifaa tofauti. Kwa viashiria vya hali visivyo na mahitaji makali, kiwango chochote cha kawaida kinaweza kukubalika.
Swali: Je, naweza kutumia LED hii kwa ulinzi wa voltage ya nyuma au kama rekta?

Jibu: Hapana kabisa. Specsheet inasema wazi kifaa hiki hakikusudiwa kufanya kazi kwa nyuma. Kutumia bias ya nyuma inayozidi 5V kunaweza kusababisha kushindwa mara moja.
Swali: Je, ninawezaje kutekeleza mwanga mweupe au rangi nyingine kwa LED hii?

Jibu: Hii ni LED ya RGB. Kwa kutumia udhibiti wa kujitegemea wa ukubwa wa chipi nyekundu, kijani kibichi na bluu kupitia PWM (udhibiti wa upana wa msukumo) au kudimisha analogi, anuwai ya rangi inaweza kuzalishwa kwa kuchanganya rangi kwa kuongeza. Kwa mfano, kuamilisha mwanga nyekundu na kijani kibichi kwa ukubwa sawa hutoa rangi ya manjano, na kuamilisha rangi zote tatu kwa ukubwa kamili hutoa aina ya mwanga mweupe (ubora wa mwanga mweupe unategemea pato maalum la wigo la kila chipi).

11. Mifano Halisi ya Ubunifu na Matumizi
Mfano: Kubuni Kiashiria cha Taa cha Hali Nyingi kwa Swichi ya Mtandao

1. Mbunifu alihitaji hali tatu: Nguvu (mwanga wa kijani), Shughuli (mwanga wa kijani unayowaka na kuzima) na Hitilafu (mwanga nyekundu). Pia alitaka hali ya nne ya "Kusubiri" (mwanga wa bluu). Kubuni kulirahisishwa kwa kutumia LTST-N683GBEW moja:Mpangilio wa PCB:
2. Inahitaji kifurushi kimoja cha kipengee tu, kuokoa nafasi.Kiolesura cha Kidhibiti Ndogo:
3. Pini tatu za GPIO za kidhibiti ndogo ya mfumo zimeunganishwa kwa anodi nyekundu, kijani na bluu (kila moja kupitia kipingamizi kinachofaa cha kudhibiti mkondo, kwa mfano, kwa usambazaji wa 3.3V, tumia 150Ω kwa kijani/bluu, 75Ω kwa nyekundu). Kathodi ya pamoja imeunganishwa kwa ardhi.Udhibiti wa Firmware:
   • MCU firmware can easily set the status:
   • Power On: Green LED pin = High.
   • Active: Toggle the green LED pin using a timer.
   • Fault: Red LED pin = High.
   • Standby: Blue LED pin = High.
4. Combined states (e.g., fault during activity) can also be achieved by driving multiple pins.Uzalish:

Mashine ya kujisukuma ya kukandamiza sehemu hushughulikia sehemu moja badala ya tatu, na hivyo kuongeza kasi ya usanikishaji na kupunguza makosa yanayoweza kutokea katika uwekaji.

12. Prinsipni tushuntirish

• Yarimo'tkazgichli nur chiqaruvchi diod (LED) - bu orqali oqim o'tganda yorug'lik chiqaradigan yarimo'tkazgichli qurilma. Bu hodisa elektrolüminesans deb ataladi va qurilma ichida elektronlar va teshiklar qayta birlashganda, energiya fotonlar shaklida chiqarilganda sodir bo'ladi. Chiqarilgan yorug'likning rangi ishlatilgan yarimo'tkazgich materialining energiya tarmoqli oralig'i bilan belgilanadi:Qizil LED (pin 2):
• Qizil/to'q sariq rangga mos keladigan energiya tarmoqli oralig'iga ega bo'lgan alyuminiy-indiy-galliy fosfid (AlInGaP) materialidan foydalanadi.Ko'k va yashil LEDlar (pin 3 va 4):

Indiy-galliy nitrid (InGaN) materialidan foydalanadi. Indiy/galliy nisbatini o'zgartirish orqali energiya tarmoqli oralig'ini ultrabinafsha rangdan ko'k rangga va keyin yashil to'lqin uzunliklarigacha chiqarish uchun sozlash mumkin.

LTST-N683GBEW inaunganisha makutano matatu kama haya ya semiconductor ndani ya ufungashaji mmoja, ikiwa na muunganisho wa cathode ya pamoja na lenzi ya plastiki inayotawanyisha ambayo huunda pato la mwanga na kutoa ulinzi wa kiufundi na mazingira.

13. Mwelekeo wa Maendeleo

• Mabadiliko ya SMD LED yenye chip nyingi kama LTST-N683GBEW yanafuata mwelekeo mpana wa optoelectronics:Uboreshaji wa Ushirikiano:
• Kuzidi RGB rahisi, kujumuisha chip ya mwanga mweupe au rangi ya ziada (k.m., RGBW - nyekundu, kijani, bluu, nyeupe) ndani ya kifurushi kimoja, kwa ajili ya ubora bora wa kuonyesha rangi na ufanisi.Ufanisi Zaidi:
• Uboreshaji endelevu wa ufanisi wa quantum wa ndani (IQE) na teknolojia za uchimbaji wa mwanga, hufanya uwezekano wa kupata nguvu ya mwanga (mcd) kubwa zaidi chini ya mkondo sawa wa pembejeo, na hivyo kupunguza matumizi ya nguvu.Kupunguzwa kwa ukubwa:
• Kupunguzwa kwa ukubwa wa ufungaji kwa kuendelea huku ukidumisha au kuboresha utendaji wa macho, kuruhusu LED kutumika katika vifaa vidogo vya watumiaji.Uboreshaji wa Kugawanya na Uthabiti:
• Maendeleo katika udhibiti wa mchakato wa utengenezaji yanaleta usambazaji mwembamba wa vigezo, kupunguza hitaji la kugawanya kwa upana, na kutoa utendaji thabiti zaidi moja kwa moja kutoka kwa uzalishaji.Uboreshaji wa Utendaji wa Joto:

Maendeleo ya nyenzo za ufungaji na miundo yenye upinzani mdogo wa joto, kuruhusu mkondo wa kuendesha wa juu zaidi na pato kubwa la mwanga, bila kuathiri uthabiti.