Teburin Abubuwan Ciki
- 1. Bayyani Game da Samfur
- 1.1 Siffofi
- 1.2 Aikace-aikace
- 2. Girman Fakitin da Bayanan Injiniya
- 3. Ƙima da Halaye
- 3.1 Matsakaicin Ƙimar Ƙarfafawa
- 3.2 Shawarar Bayanin Yanayin Reflow na IR
- 3.3 Halayen Lantarki da Na Gani
- . Binning System
- .1 Forward Voltage (VF) Binning
- .2 Luminous Intensity (Iv) Binning
- .3 Hue (Dominant Wavelength, λd) Binning
- . Typical Performance Curves
- . User Guide and Assembly Information
- .1 Cleaning
- .2 Recommended PCB Pad Layout
- .3 Tape and Reel Packaging Specifications
- .4 Storage and Handling
- . Application Notes and Design Considerations
- .1 Current Limiting
- .2 Thermal Management
- .3 Optical Design
- .4 Soldering Process Control
- . Technical Comparison and Advantages
- . Frequently Asked Questions (FAQ)
- . Operational Principle
1. Bayyani Game da Samfur
Wannan takarda ta yi cikakken bayani game da ƙayyadaddun bayanai na ƙaramin fitilar LED mai hawa a saman, wanda aka ƙera don haɗa allon da'ira (PCB) ta atomatik. Ana siffanta na'urar da ƙaramin girman ta sosai, wanda ya sa ta dace da aikace-aikacen da ke da ƙarancin sarari. Tana amfani da kayan semiconductor na AlInGaP (Aluminum Indium Gallium Phosphide) don samar da hasken kore, yana ba da haske mai ƙarfi a cikin ƙaramin siffa.
1.1 Siffofi
- Yarjejeniya da umarnin RoHS (Ƙuntata Abubuwa Masu Hatsari).
- Fakitin siriri sosai na milimita 0.35.
- Fitowar haske mai ƙarfi ta amfani da fasahar guntu AlInGaP.
- An yi fakitin a kan tef na milimita 8 wanda aka nannade a kan reels masu diamita inci 7 don ɗauka da sanyawa ta atomatik.
- Tsarin fakitin EIA (Ƙungiyar Masana'antar Lantarki) na yau da kullun.
- Daidaitacce tare da matakan tuƙi na da'ira haɗaɗɗiya (IC) na yau da kullun.
- An ƙera shi don dacewa da kayan aikin sanyawa ta atomatik.
- Ya dace da hanyoyin gyaɗa na infrared (IR) reflow.
1.2 Aikace-aikace
An yi wannan LED ne don ɗimbin kayan aikin lantarki inda ake buƙatar ƙaramin girma da nuni mai dogaro. Yankunan aikace-aikacen yau da kullun sun haɗa da:
- Na'urorin sadarwa, kayan aikin sarrafa ofis, kayan amfanin gida, da tsarin sarrafa masana'antu.
- Hasken baya na maɓallan maɓalli da madannai.
- Alamun yanayi da wutar lantarki.
- Ƙananan nuni da alamun panel.
- Hasken sigina da alama.
2. Girman Fakitin da Bayanan Injiniya
An saka LED a cikin fakitin hawa-saman na yau da kullun. Launin ruwan tabarau ya bayyana a sarari, yayin da tushen haske ke fitar da launin kore. Muhimman girma sun haɗa da tsawon jiki na 1.6mm, faɗin 0.8mm, da tsayin 0.35mm. Duk ƙimar girman yawanci ±0.1mm ne sai dai idan an faɗi akasin haka. Ya kamata a koma ga cikakkun zane-zanen injiniya don ainihin tsarin pad da wurin sanyawa.
3. Ƙima da Halaye
3.1 Matsakaicin Ƙimar Ƙarfafawa
Matsalolin da suka wuce waɗannan iyakoki na iya haifar da lalacewa ta dindindin ga na'urar. Duk ƙimar an ƙayyade su a yanayin zafin muhalli (Ta) na 25°C.
- Rushewar Wutar Lantarki (Pd): 50 mW
- Matsakaicin Halin Gaba (IFP): 40 mA (a cikin sake zagayowar aiki 1/10, faɗin bugun jini 0.1ms)
- Ci gaba da Halin Gaba (IF): 20 mA DC
- Ƙarfin Wuta na Baya (VR): 5 V
- Kewayon Zafin Aiki (Topr): -30°C zuwa +85°C
- Kewayon Zafin Ajiya (Tstg): -40°C zuwa +85°C
- Yanayin Gyaɗa na Infrared Reflow: Matsakaicin zafin jiki 260°C na iyakar daƙiƙa 10.
3.2 Shawarar Bayanin Yanayin Reflow na IR
Don hanyoyin gyaɗa marasa gubar (Pb-free), ana ba da shawarar takamaiman bayanin yanayin zafin jiki don tabbatar da haɗin gyaɗa mai dogaro ba tare da lalata fakitin LED ba. Bayanin yawanci ya haɗa da matakin riga-kafi, haɓakawa, yankin matsakaicin zafin jiki wanda bai wuce 260°C ba, da kuma matakin sanyaya mai sarrafawa. Ya kamata a sarrafa jimlar lokacin da ya wuce 217°C (zafin jiki na ruwa na gyaɗa mara gubar na yau da kullun) bisa ga ƙayyadaddun man gyaɗa.
3.3 Halayen Lantarki da Na Gani
Waɗannan ma'auni suna ayyana aikin yau da kullun na LED a ƙarƙashin yanayin aiki na al'ada a Ta=25°C.
- Ƙarfin Hasken (Iv): Ya bambanta daga 4.5 zuwa 28 millicandelas (mcd) a halin gaba (IF) na 5 mA. An auna shi tare da firikwensin da aka tace zuwa lanƙwasa amsa ido na CIE photopic.
- Kusurwar Dubawa (2θ½): Digiri 130. Wannan shine cikakken kusurwar da ƙarfin haske ya faɗi zuwa rabin ƙimar sa akan-axis.
- Matsakaicin Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon 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- Matsakaicin Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon Tsawon 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- Spectral Line Half-Width (Δλ): Approximately 15 nm, indicating the spectral purity of the green emission.
- Forward Voltage (VF): Ranges from 1.7V to 2.3V at IF=5mA.
- Reverse Current (IR): Maximum of 10 microamperes (µA) at a reverse voltage (VR) of 5V.
. Binning System
To ensure consistency in application, LEDs are sorted into bins based on key parameters. This allows designers to select parts that meet specific voltage, brightness, and color requirements.
.1 Forward Voltage (VF) Binning
Bins are defined by the forward voltage drop at 5mA.
E2: 1.7V - 1.9V
E3: 1.9V - 2.1V
E4: 2.1V - 2.3V
Tolerance per bin: ±0.1V
.2 Luminous Intensity (Iv) Binning
Bins are defined by the luminous intensity at 5mA.
J: 4.5 mcd - 7.1 mcd
K: 7.1 mcd - 11.2 mcd
L: 11.2 mcd - 18.0 mcd
M: 18.0 mcd - 28.0 mcd
Tolerance per bin: ±15%
.3 Hue (Dominant Wavelength, λd) Binning
Bins are defined by the dominant wavelength at 5mA, determining the precise shade of green.
C: 567.5 nm - 570.5 nm
D: 570.5 nm - 573.5 nm
E: 573.5 nm - 576.5 nm
Tolerance per bin: ±1 nm
. Typical Performance Curves
Graphical data provides deeper insight into device behavior under varying conditions. Typical curves include:
- Forward Current vs. Forward Voltage (I-V Curve): Shows the exponential relationship, critical for current-limiting resistor calculation.
- Luminous Intensity vs. Forward Current: Demonstrates how light output increases with current, up to the maximum rating.
- Luminous Intensity vs. Ambient Temperature: Shows the decrease in light output as junction temperature rises, important for thermal management.
- Spectral Distribution: A plot of relative intensity versus wavelength, centered around the peak wavelength of 574nm.
. User Guide and Assembly Information
.1 Cleaning
If cleaning after soldering is necessary, only use specified solvents. Immerse the LED in ethyl alcohol or isopropyl alcohol at room temperature for less than one minute. Avoid using aggressive or unspecified chemical cleaners which may damage the epoxy lens or package.
.2 Recommended PCB Pad Layout
A suggested land pattern (footprint) for the PCB is provided to ensure proper solder fillet formation and mechanical stability. This pattern accounts for the package dimensions and recommended solder mask clearance.
.3 Tape and Reel Packaging Specifications
The LEDs are supplied on embossed carrier tape with a protective cover tape. Key specifications include 8mm tape width, pocket spacing, and reel dimensions (7-inch diameter). Standard reel quantity is 5000 pieces. Packaging follows ANSI/EIA-481 standards.
.4 Storage and Handling
- ESD Precautions:The device is sensitive to electrostatic discharge (ESD). Use wrist straps, anti-static mats, and properly grounded equipment during handling.
- Moisture Sensitivity:The package is rated MSL 2a. Once the original moisture-barrier bag is opened, components should be subjected to IR reflow within 672 hours (28 days) under controlled humidity (<60% RH). For storage beyond this period or in uncontrolled environments, a bake-out at approximately 60°C for 20 hours is recommended before soldering.
- Unopened Packages:Store at ≤ 30°C and ≤ 90% relative humidity. Use within one year from the date code.
. Application Notes and Design Considerations
.1 Current Limiting
An external current-limiting resistor is mandatory for reliable operation. The resistor value (R) can be calculated using Ohm's Law: R = (Vsupply - VF) / IF, where VF is the forward voltage from the bin or typical value, and IF is the desired drive current (not to exceed 20mA DC). Always consider power supply tolerance and LED VF variation in the calculation.
.2 Thermal Management
While the power dissipation is low, maintaining a low junction temperature is crucial for long-term reliability and stable light output. Ensure adequate PCB copper area around the LED pads to act as a heat sink, especially when driving at higher currents within the rated range.
.3 Optical Design
The wide 130-degree viewing angle makes this LED suitable for applications requiring broad illumination or visibility from multiple angles. For focused light, external lenses or light guides may be necessary. The water-clear lens provides minimal light absorption.
.4 Soldering Process Control
Adherence to the recommended reflow profile is critical. Excessive time above liquidus temperature or peak temperatures exceeding 260°C can cause internal wire bond failure or package cracking. Manual soldering with an iron should be limited to 300°C for a maximum of 3 seconds, applied only once.
. Technical Comparison and Advantages
The primary differentiator of this component is its 0.35mm profile, which is significantly thinner than many standard SMD LEDs. This allows for integration into ultra-slim consumer electronics. The use of AlInGaP technology provides higher efficiency and better temperature stability compared to some older green LED technologies, resulting in more consistent brightness and color over the operating temperature range. The comprehensive binning system offers designers precise control over the visual and electrical characteristics of their end product.
. Frequently Asked Questions (FAQ)
Q: Can I drive this LED directly from a 3.3V or 5V logic output?
A: No. You must always use a series current-limiting resistor. The calculation in section 7.1 applies. Driving it directly will likely exceed the maximum current and destroy the LED.
Q: What is the difference between peak wavelength and dominant wavelength?
A: Peak wavelength (λP) is the wavelength at which the emission spectrum has its highest intensity. Dominant wavelength (λd) is the single wavelength that would produce the same color perception as the LED's light. λd is more relevant for color specification.
Q: How do I interpret the bin code in the part number?
A>The part number LTST-C193KGKT-5A includes embedded codes. The 'K' typically corresponds to a specific luminous intensity bin (e.g., the K bin from 7.1-11.2 mcd), and the 'G' indicates the green color. The exact mapping should be confirmed with the manufacturer's detailed bin code list.
Q: Is this LED suitable for outdoor use?
A: The operating temperature range is -30°C to +85°C, which covers many environments. However, the datasheet specifies applications as primarily indoor (e.g., signboards). For outdoor use, consider additional protection from UV radiation and moisture ingress, which are not covered in this document.
. Operational Principle
This LED operates on the principle of electroluminescence in a semiconductor p-n junction. When a forward voltage exceeding the diode's turn-on voltage (VF) is applied, electrons from the n-type AlInGaP material recombine with holes from the p-type material in the active region. This recombination event releases energy in the form of photons (light). The specific composition of the AlInGaP alloy determines the bandgap energy, which directly defines the wavelength (color) of the emitted light, in this case, green. The epoxy lens serves to protect the semiconductor chip, shape the light output beam, and enhance light extraction from the material.
Kalmomin Ƙayyadaddun LED
Cikakken bayanin kalmomin fasaha na LED
Aikin Hasken Wutar Lantarki
| Kalma | Naúrar/Wakilci | Bayanin Sauri | Me yasa yake da muhimmanci |
|---|---|---|---|
| Ingancin Hasken Wuta | lm/W (lumen kowace watt) | Fitowar haske kowace watt na wutar lantarki, mafi girma yana nufin mafi ingancin kuzari. | Kai tsaye yana ƙayyade matakin ingancin kuzari da farashin wutar lantarki. |
| Gudun Hasken Wuta | lm (lumen) | Jimillar hasken da tushe ke fitarwa, ana kiransa "haske". | Yana ƙayyade ko hasken yana da haske sosai. |
| Kusurwar Dubawa | ° (digiri), misali 120° | Kusurwar da ƙarfin haske ya ragu zuwa rabi, yana ƙayyade faɗin haske. | Yana shafar kewar haskakawa da daidaito. |
| Zafin Launi (CCT) | K (Kelvin), misali 2700K/6500K | Zafi/sanyin haske, ƙananan ƙimomi rawaya/zafi, mafi girma fari/sanyi. | Yana ƙayyade yanayin haskakawa da yanayin da suka dace. |
| CI / Ra | Ba naúrar, 0–100 | Ikon ba da launukan abubuwa daidai, Ra≥80 yana da kyau. | Yana shafar sahihancin launi, ana amfani dashi a wurare masu buƙatu kamar shaguna, gidajen tarihi. |
| SDCM | Matakan ellipse MacAdam, misali "5-mataki" | Ma'aunin daidaiton launi, ƙananan matakai suna nufin mafi daidaiton launi. | Yana tabbatar da daidaiton launi a cikin rukunin LED iri ɗaya. |
| Matsakaicin Tsawon Raɗaɗin Hasken | nm (nanomita), misali 620nm (ja) | Tsawon raɗaɗin haske daidai da launin LED masu launi. | Yana ƙayyade launin ja, rawaya, kore LED masu launi ɗaya. |
| Rarraba Bakan Hasken | Layin tsawon raɗaɗi da ƙarfi | Yana nuna rarraba ƙarfi a cikin tsawon raɗaɗin haske. | Yana shafar ba da launi da ingancin launi. |
Ma'auni na Lantarki
| Kalma | Alamar | Bayanin Sauri | Abubuwan ƙira |
|---|---|---|---|
| Ƙarfin lantarki na gaba | Vf | Mafi ƙarancin ƙarfin lantarki don kunna LED, kamar "maƙallan farawa". | Ƙarfin lantarki na injin dole ya zama ≥Vf, ƙarfin lantarki yana ƙara don LED a jere. |
| Ƙarfin lantarki na gaba | If | Ƙimar ƙarfin lantarki don aikin LED na yau da kullun. | Yawanci tuƙi mai ƙarfi akai-akai, ƙarfin lantarki yana ƙayyade haske da tsawon rai. |
| Matsakaicin Ƙarfin lantarki na bugun jini | Ifp | Matsakaicin ƙarfin lantarki mai jurewa na ɗan lokaci, ana amfani dashi don duhu ko walƙiya. | Fadin bugun jini da sake zagayowar aiki dole ne a sarrafa su sosai don guje wa lalacewa. |
| Ƙarfin lantarki na baya | Vr | Matsakaicin ƙarfin lantarki na baya da LED zai iya jurewa, wanda ya wuce zai iya haifar da rushewa. | Dangane dole ne ya hana haɗin baya ko ƙarfin lantarki. |
| Juriya na zafi | Rth (°C/W) | Juriya ga canja wurin zafi daga guntu zuwa solder, ƙasa yana da kyau. | Babban juriya na zafi yana buƙatar zubar da zafi mai ƙarfi. |
| Rigakafin ESD | V (HBM), misali 1000V | Ikon jurewa zubar da wutar lantarki, mafi girma yana nufin ƙasa mai rauni. | Ana buƙatar matakan hana wutar lantarki a cikin samarwa, musamman ga LED masu hankali. |
Gudanar da Zafi & Amincewa
| Kalma | Ma'aunin maɓalli | Bayanin Sauri | Tasiri |
|---|---|---|---|
| Zazzabin Haɗin gwiwa | Tj (°C) | Ainihin yanayin aiki a cikin guntun LED. | Kowane raguwa 10°C na iya ninka tsawon rai; yayi yawa yana haifar da lalacewar haske, canjin launi. |
| Ragewar Lumen | L70 / L80 (sa'o'i) | Lokacin da haske ya ragu zuwa 70% ko 80% na farko. | Kai tsaye yana ayyana "tsawon sabis" na LED. |
| Kula da Lumen | % (misali 70%) | Kashi na hasken da aka riƙe bayan lokaci. | Yana nuna riƙon haske akan amfani na dogon lokaci. |
| Canjin Launi | Δu′v′ ko ellipse MacAdam | Matsakaicin canjin launi yayin amfani. | Yana shafar daidaiton launi a cikin yanayin haskakawa. |
| Tsufa na Zafi | Lalacewar kayan aiki | Lalacewa saboda yanayin zafi na dogon lokaci. | Zai iya haifar da raguwar haske, canjin launi, ko gazawar buɗe kewaye. |
Tufafi & Kayan Aiki
| Kalma | Nau'ikan gama gari | Bayanin Sauri | Siffofi & Aikace-aikace |
|---|---|---|---|
| Nau'in Kunshin | EMC, PPA, Yumbu | Kayan gida masu kare guntu, samar da hanyar sadarwa ta gani/zafi. | EMC: juriya mai kyau na zafi, farashi mai rahusa; Yumbu: mafi kyawun zubar da zafi, tsawon rai. |
| Tsarin Guntu | Gaba, Guntu Juyawa | Tsarin na'urorin lantarki na guntu. | Juyawar guntu: mafi kyawun zubar da zafi, inganci mafi girma, don ƙarfi mai ƙarfi. |
| Rufin Phosphor | YAG, Silicate, Nitride | Yana rufe guntu shuɗi, yana canza wasu zuwa rawaya/ja, yana haɗa su zuwa fari. | Phosphor daban-daban suna shafar inganci, CCT, da CRI. |
| Ruwan tabarau/Optics | Lefi, Microlens, TIR | Tsarin gani a saman yana sarrafa rarraba haske. | Yana ƙayyade kusurwar dubawa da layin rarraba haske. |
Kula da Inganci & Rarraba
| Kalma | Abun rarraba | Bayanin Sauri | Manufa |
|---|---|---|---|
| Kwalin Gudun Hasken | Lambar misali 2G, 2H | An tattara su ta hanyar haske, kowace ƙungiya tana da ƙananan/matsakaicin ƙimar lumen. | Yana tabbatar da daidaiton haske a cikin jeri ɗaya. |
| Kwalin Ƙarfin lantarki | Lambar misali 6W, 6X | An tattara su ta hanyar kewayon ƙarfin lantarki na gaba. | Yana sauƙaƙe daidaitawar tuƙi, yana inganta ingancin tsarin. |
| Kwalin Launi | Ellipse MacAdam 5-mataki | An tattara su ta hanyar daidaitattun launi, yana tabbatar da ƙuntataccen kewayon. | Yana ba da garantin daidaiton launi, yana guje wa launi mara daidaituwa a cikin kayan aikin. |
| Kwalin CCT | 2700K, 3000K da sauransu | An tattara su ta hanyar CCT, kowanne yana da madaidaicin kewayon daidaitawa. | Yana cika buƙatun CCT na yanayi daban-daban. |
Gwaji & Takaddun Shaida
| Kalma | Matsakaicin/Gwaji | Bayanin Sauri | Muhimmanci |
|---|---|---|---|
| LM-80 | Gwajin kula da lumen | Haskakawa na dogon lokaci a yanayin zafi akai-akai, yana rikodin lalacewar haske. | Ana amfani dashi don kimanta rayuwar LED (tare da TM-21). |
| TM-21 | Matsakaicin kimanta rayuwa | Yana kimanta rayuwa a ƙarƙashin yanayi na ainihi bisa bayanan LM-80. | Yana ba da hasashen kimiyya na rayuwa. |
| IESNA | Ƙungiyar Injiniyoyin Haskakawa | Yana rufe hanyoyin gwajin gani, lantarki, zafi. | Tushen gwaji da masana'antu suka amince. |
| RoHS / REACH | Tabbatarwar muhalli | Yana tabbatar da babu abubuwa masu cutarwa (darma, mercury). | Bukatar shiga kasuwa a duniya. |
| ENERGY STAR / DLC | Tabbatarwar ingancin kuzari | Tabbatarwar ingancin kuzari da aiki don samfuran haskakawa. | Ana amfani dashi a cikin sayayyan gwamnati, shirye-shiryen tallafi, yana haɓaka gasa. |