SMD LED LTST-008UWQEET Datasheet - White and Red Light - 30mA Forward Current - 102mW Power Dissipation - Simplified Chinese Technical Document

1. Product Overview

Waraka huu unaelezea kwa kina vipimo vya kipengele cha LED cha Surface-Mount Device (SMD). LED hii imebuniwa kwa ajili ya usanikishaji wa kiotomatiki wa bodi za mzunguko wa kuchapishwa (PCB) na inafaa kwa matumizi muhimu yanayopungukiwa na nafasi. Kipengele hiki kinaunganisha vyanzo viwili vya mwanga vilivyojitegemea ndani ya kifurushi kimoja.

1.1 Product Features

• Compliant with the RoHS environmental standard.
• Imejengwa kwenye mkanda wa 12mm, umewindwa kwenye reel ya kipenyo cha inchi 7, inarahisisha usindikaji wa otomatiki.
• Ukubwa wa kifurushi cha kawaida cha EIA, inahakikisha utangamano.
• Kiwango cha ingizo kinaendana na viwango vya mantiki ya mnyororo wa umeme (IC).
• The design is compatible with automated surface-mount assembly equipment.
• It can withstand standard infrared (IR) reflow soldering processes.
• Imepakiwa kwa awali kulingana na JEDEC Moisture Sensitivity Level 3.

1.2 Maeneo ya Utumizi

LED hii inafaa kwa vifaa na mifumo mbalimbali ya elektroniki, ikiwa ni pamoja na lakini sio tu:

• Vifaa vya mawasiliano (kwa mfano, simu zisizo na waya na simu za mkononi).
• Vifaa vya otomatiki ya ofisi na kompyuta za mkononi.
• Vifaa vya nyumbani na bidhaa za umeme za watumiaji.
• Mifumo ya mtandao na vifaa vya udhibiti wa viwanda.
• Matumizi ya alama za ndani na maonyesho.

2. Vigezo vya Kiufundi: Ufafanuzi wa Kina na Usio na Upendeleo

2.1 Absolute Maximum Ratings

Hizi viwango vya kawaida vinafafanua hali ya mipaka ambayo inaweza kusababisha uharibifu wa kudumu wa kifaa. Uendeshaji chini ya hali hizi hauhakikishi utendakazi.

• Matumizi ya nguvu (Pd):102 mW (mwanga mweupe), 72 mW (mwanga mwekundu). Hii ndiyo nguvu ya juu ya joto ambayo LED inaweza kutawanya wakati joto la mazingira (Ta) ni 25°C.
• Peak Forward Current (I_F(PEAK)):100 mA (white light), 80 mA (red light). This is the maximum instantaneous current allowed under pulse conditions (1/10 duty cycle, 0.1ms pulse width).
• Direct forward current (I_FF):
• Both colors are 30 mA. This is the maximum continuous forward current recommended for reliable operation.Operating temperature range:
• -40°C hadi +85°C. Kifaa kimeundwa kufanya kazi katika anuwai hii ya joto ya mazingira.Anuwai ya joto la uhifadhi:

-40°C hadi +100°C. Kifaa kinaweza kuhifadhiwa katika anuwai hii bila kuwa na umeme.

2.2 Electrical and Optical Characteristics_FVigezo hivi vinapimwa chini ya hali ya kawaida ya Ta=25°C na I

• F_v=20mA.Mwanga unaotolewa (Φ
• v_v):Mwanga Mweupe: 4.15-11.4 lm (kiwango cha chini-hadi-kiwango cha juu). Mwanga Mwekundu: 1.07-2.71 lm (kiwango cha chini-hadi-kiwango cha juu). Hii ndiyo pato la jumla la mwanga unaoonekana unaotolewa na LED.
• Mwangaza wa mwanga (I_v):Mwanga mweupe: 1500-4100 mcd (kiwango cha chini-kiwango cha juu). Mwanga mwekundu: 355-900 mcd (kiwango cha chini-kiwango cha juu). Hii ni pato la mwanga katika mwelekeo maalum, iliyopimwa kwa milicandela.
• Pembe ya mtazamo (2θ_d1/2):
• Thamani ya kawaida ni digrii 120. Hii ndiyo pembe kamili wakati mwangaza wa mwanga unapungua hadi nusu ya thamani yake ya kilele kwenye mhimili.Wavelength kuu (λ
• D_F):Kwa LED nyekundu: 617-630 nm (masafa ya kawaida). Kwa LED nyeupe, viwianishi vya rangi vinatolewa.
• Viwianishi vya rangi (x, y):_RKwa LED nyeupe: x=0.31, y=0.31 (thamani ya kawaida). Hii huweka nukta nyeupe karibu na wimbo wa Planck.Forward Voltage (V_RF

):

White: 2.8-3.4V (Min-Max). Red: 1.8-2.4V (Min-Max). Tolerance is +/- 0.1V. This is the voltage drop across the LED when operating at the specified current.

Reverse current (I_vR

):

At V

• R=5V, the maximum value for both colors is 10 μA. This device is not designed for reverse bias operation; this parameter is for test purposes only.
• 3. Binning System DescriptionLED zinagawanywa katika vikundi tofauti vya daraja kulingana na utendaji, ili kuhakikisha uthabiti. Nambari ya kugawa daraja imewekwa alama kwenye mfuko wa bidhaa.
• 3.1 Nguvu ya Mwanga (Iv

) Kugawa Daraja

• LEDs are grouped based on their light output measured at 20mA.White LED Binning:
• W1:Luminous flux: 4.15-5.80 lm, Intensity: 1500-2100 mcd.

W2:

Luminous flux: 5.80-8.10 lm, Intensity: 2100-2900 mcd.

W3:

• Fluxu ya mwanga: 8.10-11.40 lm, nguvu: 2900-4100 mcd.
• Red LED Binning:
• R1:

Luminous Flux: 1.07-1.68 lm, Intensity: 355-600 mcd.

R2:

Flux ya mwanga: 1.68-2.71 lm, nguvu: 600-900 mcd.

Toleransi ya kila kiwango cha mtiririko wa mwanga ni +/- 11%.

• 3.2 White LED Color (Chromaticity) Binning_FLED nyeupe hufafanuliwa zaidi kulingana na viwianishi vya chromaticity (x, y) kwenye chati ya chromaticity ya CIE 1931 ili kudhibiti tofauti za rangi._FMisimbo ya uainishaji inajumuisha Z1, Y1, Y2, X1, W1, W2.Kila kiwango kinafafanuliwa na eneo la pembe nne kwenye chati ya rangi, lenye alama nne maalum za (x,y).
• Kila kiwango cha rangi kina uvumilivu wa +/- 0.01 kwenye viwianishi x na y._v3.3 Combined Binning Code on Label_FMsimbo mmoja wa herufi na nambari (A1 hadi A6) kwenye lebo ya ufungasho unachanganya viwango vya kiwango cha mwanga wa LED nyeupe na nyekundu ndani ya ufungasho sawa, kama inavyoonyeshwa kwenye jedwali la rejeleo mchanganyiko.4. Uchambuzi wa Curve ya Utendaji
• Mwongozo una mstari wa sifa za kawaida zilizopimwa kwa joto la mazingira la 25°C (isipokuwa ikitajwa vingine). Mistari hii ni muhimu kwa uchambuzi wa muundo.Forward Current vs. Forward Voltage (I
• F-V_PF
• curve):Inaonyesha uhusiano wa kielelezo kati ya mkondo na voltage kwa LED nyeupe na nyekundu. Hii ni muhimu sana katika kubuni saketi ya kuendesha yenye kikomo cha mkondo.

Ukali wa mwanga dhidi ya mkondo wa mwelekeo mzuri (I

v

-I

F

curve):

• It illustrates how the light output increases with the driving current, typically growing in a sublinear manner at higher currents due to efficiency droop and heating.
• Relative Luminous Intensity vs. Ambient Temperature:
• Inaonyesha utegemezi wa joto wa pato la mwanga. Ukubwa wa mwangaza kwa kawaida hupungua kadiri halijoto ya kiungo inavyoongezeka.

Usambazaji wa wigo:

Kwa LED nyekundu, mkunjo huu unaonyesha mabadiliko ya nguvu ya mionzi ya jamaa kuhusiana na urefu wa wimbi, ikionyesha urefu wa wimbi wa kilele cha utoaji (λ

D

) and spectral half-width (Δλ).

Viewing angle distribution diagram:

A polar plot showing the angular distribution of luminous intensity, confirming a viewing angle of 120 degrees.

• 5. Taarifa za Mitambo na Ufungashaji5.1 Package Dimensions
• This LED uses a standard surface-mount package. All dimensions are in millimeters, with a general tolerance of ±0.2 mm unless otherwise specified. The drawing shows the top view, side view, and pad layout.5.2 Pin Assignment and Polarity Identification
• This component has multiple pins. The assignment is as follows:Pini (0,1) na 2: Zimeunganishwa kwenye chipi ya LED ya mwanga wa bluu/nyeupe (InGaN).
• Pini 3 na 4: Zimeunganishwa kwenye chipi ya LED ya mwanga mwekundu (AlInGaP).Pini 5 na (6,7): Hazijaunganishwa (tupu).

Rangi ya lenzi ni njano. Ni lazima kuzingatia polariti sahihi wakati wa kuunganisha mzunguko wa kuendesha; kutumia voltage ya kinyume kunaweza kuharibu kifaa.

5.3 Recommended PCB Pad Layout

It provides the recommended land pattern (copper land layout) to ensure reliable soldering, proper thermal management, and mechanical stability. Following this recommendation helps prevent tombstoning and ensures good solder joint formation.

• 6. Mwongozo wa Uchimbaji na Usanikishaji
• 6.1 Mkunjo wa Joto wa Uchimbaji wa Infrared Reflow
• A detailed lead-free reflow soldering temperature profile is specified for lead-free (Pb-free) soldering processes, complying with the J-STD-020B standard. The graph shows:
• Preheating/Warming-up Zone:

Control the temperature rise to activate the flux.

• Soaking Zone:Kipindi cha kiwango cha juu, ambacho huwasha kwa usawa bodi ya mzunguko na vipengele.
• Eneo la kurejesha:Kiwango cha juu cha joto hakipaswi kuzidi kiwango cha juu kinachoruhusiwa kwa kipengele (kinachohusiana na joto la uhifadhi).
• Kasi ya kupoza:Kudhibiti kupoa, ili sehemu ya mshumaa igande kwa usahihi.

Kufuata mkunjo huu wa joto ni muhimu ili kuzuia mshtuko wa joto, kuhakikisha muunganisho wa kuaminika wa mshumaa bila kuharibu kifurushi cha LED au chipu ya ndani.

6.2 Cleaning

Ikiwa unahitaji kusafisha baada ya kulehemu:

• Tumia ethanol au isopropanol pekee.Soak the LED at room temperature.
• Limit the soaking time to less than one minute.Avoid using unspecified chemical cleaners as they may damage the packaging material (e.g., causing discoloration or cracking).
• 6.3 Storage and Handling ConditionsUfungaji uliofungwa:
• Hifadhi kwa ≤30°C na ≤70% unyevunyevu jamaa (RH). Maisha ya rafiki ni mwaka mmoja wakati inahifadhiwa kwenye mfuko wa asili wa kuzuia unyevu na kikaushi.Ufungaji uliofunguliwa:
• Mazingira ya uhifadhi hayapaswi kuzidi 30°C na 60% RH. Vipengee vilivyotolewa kwenye ufungaji wa asili vinapaswa kutiwa mshono wa kujirudia infrared ndani ya saa 168 (siku 7).
• Long-term storage (out of bag):
• For storage exceeding 168 hours, LEDs should be stored in a sealed container with desiccant or in a nitrogen-purged dry box to prevent moisture absorption, which can lead to the "popcorn" effect during reflow soldering.

7. Ufungaji na Taarifa za Kuagiza

7.1 Tape and Reel Specifications

LEDs are supplied in embossed carrier tape for automated assembly.

Tape width:_s12 mm._sReel diameter:_{7 inches.}Quantity per reel:_F4000 pieces._FMinimum packaging quantity:_FRemaining quantity starts from 500 pieces.

Empty positions in the carrier tape are sealed with cover tape.

Inaruhusiwa kukosekana kwa vipengele viwili mfululizo kwa kiwango cha juu.

• Ufungaji unalingana na kiwango cha ANSI/EIA-481.
• Ukubwa wa kina wa mfereji wa mkanda na reel hutolewa kwenye hati ya maelezo.
• 8. Application Suggestions and Design Considerations_JA8.1 Saketi ya Kawaida ya Utumizi

LED is a current-driven device. The simplest driving method is to connect a current-limiting resistor in series. The resistor value (R

• S
• ) Inaweza kuhesabiwa kwa kutumia Kanuni ya Ohm: R
• S

= (V

Chanzo cha umeme

• - VF
• ) / IF
• . Use the maximum V from the datasheet.F
• ili kuhakikisha ya kwamba hata kama vipengele vina tofauti, mkondo hauzidi kikomo. Ili kupata utendaji thabiti zaidi, hasa wakati voltage ya umeme au hali ya joto inabadilika, inashauriwa kutumia kiendeshi cha mkondo wa kudumu (linear au switched-mode).8.2 Usimamizi wa Joto

Ingawa matumizi ya nguvu ni ya chini kiasi, muundo unaofaa wa joto unaweza kuongeza maisha ya LED na kudumisha pato la mwanga thabiti.

Tumia mpangilio ulipendekezwa wa PCB pad ili kusaidia upitishaji joto.

Katika matumizi ya sasa ya juu au hali ya joto ya juu ya mazingira, fikiria kutumia via za upitishaji joto chini ya pad ili kuhamisha joto kwa safu za shaba za ndani au chini.

Kwa kuzingatia upinzani wa joto kutoka kwa junction hadi mazingira (θ

JA

), ensure that the maximum junction temperature is not exceeded.

8.3 Mazingatio ya Ubunifu wa Optics

A 120-degree viewing angle provides a wide, diffuse light pattern, suitable for backlighting and status indicators.

For a more focused beam, secondary optics (lenses) can be placed above the LED.

Lensi ya manjano hutumika kama kichungi cha rangi/kidiffusaji kwa mwanga mweupe, na inaweza kuathiri halijoto halisi ya rangi (CCT).

9. Ulinganisho wa Teknolojia na Tofauti

Tofauti kuu ya kipengele hiki ni kuwa kinajumuisha usanidi wa rangi mbili (nyeupe na nyekundu) ndani ya kifuniko kimoja cha SMD. Ikilinganishwa na kutumia LED mbili tofauti, hii inaokoa nafasi kwenye PCB na kurahisisha usanikishaji. Mambo muhimu ni pamoja na:

Ufanisi wa nafasi:

1. Kuunganisha kazi mbili ndani ya ukubwa mmoja wa kifuniko.Urahisi wa Usanikishaji:
2. Mzunguko mmoja wa Usakinishaji badala ya miwili.Utendaji:
   • Inatoa vyanzo vya mwanga vya nyeupe na nyekundu vilivyojitegemea na vinavyoweza kutambuliwa kipekee, kila kimoja kina kiwango maalum cha utendaji.
   • Uwezo wa kufanana:
3. Vipimo vya kawaida vya kufunga vya EIA na uwezo wa kufanana na upakiaji wa joto wa infrared, hufanya iwe suluhisho la kuziba-na-kutumia kwa mstari wa kisasa wa uzalishaji wa SMT.10. Maswali Yanayoulizwa Mara kwa Mara (Kulingana na Vigezo vya Kiufundi)
4. 10.1 Can I drive this LED directly with a 5V power supply?No. Connecting a 5V power supply directly across the LED will cause excessive current and likely damage it. You must use a current-limiting mechanism, such as a series resistor or constant current driver, set to a maximum of 30mA DC.
5. 10.2 What is the difference between Luminous Flux (lm) and Luminous Intensity (mcd)?Luminous flux (lumens) measures the total amount of visible light emitted by the LED in all directions. Luminous intensity (candelas) measures the brightness of the LED as seen from a specific viewing direction. The mcd value in the datasheet is typically the axial (on-axis) intensity. A wide-viewing-angle LED may have a higher lumen number but a lower mcd value compared to a narrow-beam LED with the same lumen output.

10.3 How to interpret the binning code when ordering?

Tafadhali bainisha msimbo wa kikundi uliochanganywa (k.m. A3) kulingana na jedwali la kukagua mwingiliano, ili kuhakikisha kuwa vipengele vya mwanga mweupe (k.m. W2) na mwanga mwekundu (k.m. R1) vya LED unayopokea vinakidhi anuwai ya utendaji inayohitajika. Hii ni muhimu kwa matumizi ambayo yanahitaji kudumisha uthabiti wa mwangaza na rangi kati ya vitengo vingi.

10.4 Je, LED hii inafaa kwa mazingira ya nje?

• Anuwai yake ya joto la uendeshaji ni chini kama -40°C, lakini hadi +85°C. Ingawa inaweza kufanya kazi katika baadhi ya mazingira ya nje, maelezo makuu yanataja matumizi ya ndani (alama, maonyesho). Kwa matumizi ya nje, inahitajika kuzingatia mionzi inayowezekana ya ultraviolet, uvujaji wa unyevunyevu, na hali ya joto ya juu ya mazingira, ambayo inaweza kuhitaji hatua za ziada za ulinzi ambazo hazijafunikwa kwenye hati hii.11. Usanifu wa Kivitendo na Mifano ya Matumizi
• Scenario: Dual-state indicator lights for network routersDesigners need to set up power (steady white light) and network activity (blinking red light) indicator lights on a compact router PCB.

Implementation Plan:_FComponent Selection:_FLTST-008UWQEET imechaguliwa kwa sababu hutoa rangi mbili zinazohitajika ndani ya kifurushi cha 3.2mm x 2.8mm, na hivyo kuokoa nafasi.

Ubunifu wa Saketi:

Saketi mbili za kudhibiti zimeundwa kwa kujitegemea:

• Taa ya mwanga nyeupe ya LED inaendeshwa kutoka kwa mstari wa usambazaji wa 3.3V kupitia upinzani rahisi, na mkondo wa takriban 15mA, ikifanya kazi kama kiashiria cha "nguvu imewashwa" kilicho thabiti.Pini ya GPIO ya kichakataji kuu, pia iliyounganishwa mfululizo na resistor, inadhibiti LED nyekundu ya mwanga. Firmware inafanya pini hii kuwaka na kuzima kuashiria shughuli ya data.
• Muundo wa PCB:Tumia muundo wa pedi ulipendekezwa. Viunganisho vya kupoza joto vimeongezwa kwenye pedi ili kurahisisha ufungaji, huku kuhifadhi njia ya joto kwa ndege ya ardhi kwa ajili ya upozaaji joto mdogo.
• Grading:To ensure consistency among production units, the grading code A3 (White light: W2, Red light: R1) is specified in the Bill of Materials (BOM), ensuring all routers have indicator lights of similar brightness.
• Assembly:Components are supplied in 7-inch reels, compatible with the pick-and-place machines of the assembly line. The specified infrared reflow soldering temperature profile has been programmed into the reflow oven.
• This case highlights the practicality of the component in space-constrained, multi-functional indicator light applications commonly found in consumer electronics.12. Utangulizi wa Kanuni

A Light Emitting Diode (LED) is a semiconductor device that emits light when an electric current passes through it. This phenomenon is called electroluminescence.