Teburin Abubuwan Ciki
- 1. Bayyani Game da Samfur
- 1.1 Fa'idodi na Asali da Kasuwar Manufa
- 2. Ma'auni na Fasaha: Cikakken Fassarar Manufa
- 2.1 Matsakaicin Matsakaicin Matsakaici
- 2.2 Halayen Zafi
- 2.3 Halayen Lantarki da Na Gani
- 3. Bayanin Tsarin Rarraba Kwandon
- 3.1 Matsayi na Ƙarfin Wutar Gaba (VF)
- 3.2 Matsayi na Ƙarfin Haske (IV)
- 3.3 Matsayi na Launi
- 4. Bincike na Lanƙwasa Aiki
- 5. Bayanin Injiniya da Marufi
- 5.1 Girman Kunshin
- 5.2 Ganewar Polarity da Ƙirar ɗorawa
- 6. Jagororin Guda da Haɗawa
- 6.1 Shawarar Bayanin Gudanar da Gudanar da IR
- .2 Storage Conditions
- .3 Cleaning
- . Packaging and Ordering Information
- . Application Recommendations
- .1 Typical Application Scenarios
- .2 Design Considerations
- . Technical Comparison and Differentiation
- . Frequently Asked Questions Based on Technical Parameters
- . Practical Design and Usage Case
- . Principle Introduction
- . Development Trends
1. Bayyani Game da Samfur
LTST-T180UWET na'urar haɗawa ta saman (SMD) ce mai fitar da haske (LED) wacce aka tsara don haɗa allon da'ira da aka buga (PCB) ta atomatik. Tana da siffa mai ƙarami wacce ta dace da aikace-aikacen da ke da ƙarancin sarari. LED tana fitar da haske fari ta hanyar ruwan tabarau mai launin rawaya, wanda zai iya rinjayar yanayin zafin launi da yaduwar fitarwa. An ƙera wannan ɓangaren don hanyoyin ƙira masu yawa, gami da dacewa da bayanan gudanar da gudanar da infrared (IR).
1.1 Fa'idodi na Asali da Kasuwar Manufa
Abubuwan mahimmanci na wannan LED sun haɗa da bin umarnin RoHS (Ƙuntata Abubuwa masu haɗari), marufi akan tef na 8mm a cikin reels na inci 7 don kayan aikin ɗauka da sanyawa ta atomatik, da kuma shirye-shiryen zuwa ma'auni na JEDEC Level 3 na haɗarin danshi. Aikace-aikacensa na farko sun haɗa da kayan aikin sadarwa, na'urori na sarrafa ofis, na'urorin gida, allunan sarrafa masana'antu, da alamun cikin gida. Ana amfani da shi akai-akai don nuna matsayi, hasken alama, da hasken baya na gaban allon inda ake buƙatar tushen haske mai ƙarfi, mai ƙarami.
2. Ma'auni na Fasaha: Cikakken Fassarar Manufa
2.1 Matsakaicin Matsakaicin Matsakaici
A yanayin zafin muhalli (Ta) na 25°C, na'urar tana da iyakokin aiki don tabbatar da amincin kuma hana lalacewa. Matsakaicin ɓarnawar wutar lantarki shine 97.5 mW. Zai iya ɗaukar matsakaicin halin yanzu na gaba na 100 mA a ƙarƙashin yanayin bugun jini (1/10 aikin aiki, faɗin bugun jini 0.1ms), yayin da aka ba da shawarar ci gaba da halin yanzu na DC na 30 mA. An ƙididdige na'urar don aiki da ajiya a cikin kewayon zafin jiki daga -40°C zuwa +100°C.
2.2 Halayen Zafi
Matsakaicin zafin jiki (Tj) da aka yarda shine 125°C. Matsakaicin juriyar zafi daga haɗin gwiwa zuwa muhalli (Rθja) shine 60°C/W. Wannan ma'auni yana da mahimmanci don ƙirar sarrafa zafi; ƙarfin da LED ke ɓata zai sa zafin haɗin gwiwa ya tashi sama da yanayin zafi da 60°C ga kowace watt na wutar lantarki. Dole ne a yi la'akari da tsarin PCB daidai, kuma idan ya cancanta, ƙarin zafin jiki dole ne a yi la'akari da shi don kiyaye haɗin gwiwa a cikin iyakoki masu aminci yayin aiki na ci gaba.
2.3 Halayen Lantarki da Na Gani
An auna a Ta=25°C da halin yanzu na gaba (IF) na 20mA, an ayyana ma'auni na aiki na mahimmanci. Ƙarfin haske (Iv) yana da kewayon yanayi daga 1500 mcd (millicandela) zuwa 3050 mcd, yana nuna fitarwa mai haske. Kusurwar kallo (2θ1/2), wanda aka ayyana azaman cikakken kusurwar inda ƙarfin ya ragu zuwa rabin ƙimar axial, shine digiri 120, yana ba da filin haske mai faɗi sosai. Ƙarfin wutar gaba (VF) ya bambanta daga mafi ƙarancin 2.45V zuwa matsakaicin 3.25V. An ƙayyade halin yanzu na baya (IR) a matsakaicin 10 μA lokacin da aka yi amfani da ƙarfin wutar baya (VR) na 5V, lura cewa ba a ƙera na'urar don aikin baya-baya ba.
3. Bayanin Tsarin Rarraba Kwandon
Ana rarraba LED ɗin zuwa kwandon bisa ma'auni masu mahimmanci don tabbatar da daidaito a cikin samarwa mai yawa. Wannan yana ba masu ƙira damar zaɓar sassa waɗanda suka cika takamaiman da'ira ko buƙatun haske.
3.1 Matsayi na Ƙarfin Wutar Gaba (VF)
An rarraba LED ɗin zuwa kwandon wutar lantarki huɗu (D5 zuwa D8), kowannensu yana da kewayon 0.2V wanda ya fara daga 2.45V zuwa 3.25V a 20mA. Ana amfani da jurewar ±0.1V ga kowane kwandon. Wannan yana taimakawa wajen ƙirar wutar lantarki da da'irori masu iyakancewa halin yanzu tare da faɗuwar wutar lantarki da ake iya hasashen.
3.2 Matsayi na Ƙarfin Haske (IV)
An ayyana kwandon ƙarfi uku: W2 (1500-1800 mcd), X1 (1800-2340 mcd), da X2 (2340-3050 mcd). Jurewar ±11% ya shafi kowane kwandon. Zaɓin babban kwandon yana tabbatar da mafi girman fitarwar haske, wanda zai iya zama dole don aikace-aikacen da ke buƙatar mafi girman ganuwa ko don rama yaduwar haske ta hanyar kayan.
3.3 Matsayi na Launi
Ana sanya ma'auni na launi (x, y) akan zane na CIE 1931 zuwa manyan ƙungiyoyi shida (A1 zuwa F1). Kowane kwandon yana ayyana yanki mai siffar huɗu akan ginshiƙin launi. Jurewar launi (x, y) a cikin kwandon shine ±0.01. Wannan rarrabuwar yana da mahimmanci ga aikace-aikacen inda daidaiton launi a cikin LED ɗin da yawa ke da mahimmanci, kamar a cikin jerin hasken baya ko alamomin matsayi inda ake son kamanni iri ɗaya.
4. Bincike na Lanƙwasa Aiki
Yayin da aka ambaci takamaiman bayanan hoto a cikin takardar (misali, lanƙwasa na yau da kullun), bayanan tebur da aka bayar yana ba da damar bincike. Dangantakar tsakanin halin yanzu na gaba (IF) da ƙarfin wutar gaba (VF) ba ta da layi kuma ta yau da kullun na diode. Yanayin gwaji na 20mA yana ba da ma'aunin aiki na yau da kullun. Faɗin kusurwar kallo na digiri 120 yana nuna tsarin radiation na Lambertian ko makamancinsa inda ake fitar da haske a kan yanki mai faɗi maimakon ƙwanƙwasa mai mai da hankali. Bambancin ƙarfin haske da ƙarfin wutar gaba tare da zafin haɗin gwiwa shine mahimmin la'akari don ƙira; gabaɗaya, ingancin LED yana raguwa kuma ƙarfin wutar gaba yana raguwa yayin da zafin jiki ya ƙaru.
5. Bayanin Injiniya da Marufi
5.1 Girman Kunshin
LED ɗin ya yi daidai da daidaitaccen ƙafar kunshin SMD na EIA. An ba da duk ma'auni a cikin milimita tare da jurewar ma'auni na ±0.2mm sai dai idan an lura daban. An ayyana takamaiman ma'auni don tsawon jiki, faɗi, tsayi, da tazarar jagora/ɗorawa a cikin zanen kunshin, wanda ke da mahimmanci don ƙirar ƙirar ƙasa ta PCB daidai.
5.2 Ganewar Polarity da Ƙirar ɗorawa
Bangaren ya haɗa da zanen tsarin ɗorawar PCB da aka ba da shawarar don gudanar da gudanar da infrared ko tururi. Wannan shimfidar yana tabbatar da samuwar haɗin gwiwar solder da kwanciyar hankali na injiniya. Zanen yawanci yana nuna ɗorawar anode da cathode, waɗanda dole ne a daidaita su daidai da alamun polarity akan kunshin LED kanta (sau da yawa tsaga, ɗigo, ko datsa jagora).
6. Jagororin Guda da Haɗawa
6.1 Shawarar Bayanin Gudanar da Gudanar da IR
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gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da gudanar da g
.2 Storage Conditions
The LEDs are moisture-sensitive. When sealed in their original moisture-proof bag with desiccant, they should be stored at ≤30°C and ≤70% RH and used within one year. Once the bag is opened, the storage environment must not exceed 30°C and 60% RH. Components exposed beyond 168 hours require baking at approximately 60°C for at least 48 hours before soldering to remove absorbed moisture and prevent \"popcorning\" during reflow.
.3 Cleaning
If cleaning after soldering is necessary, only specified alcohol-based solvents like ethyl alcohol or isopropyl alcohol should be used. The LED should be immersed at normal temperature for less than one minute. Unspecified chemicals may damage the epoxy lens or package.
. Packaging and Ordering Information
The standard packaging is 8mm tape on 7-inch diameter reels, with 5000 pieces per reel. A minimum order quantity of 500 pieces is available for remnants. The tape and reel specifications comply with ANSI/EIA 481 standards. The packaging includes a top cover tape to seal empty pockets, and there is a limit on the number of consecutive missing components.
. Application Recommendations
.1 Typical Application Scenarios
This LED is ideal for status indicators in consumer electronics (phones, laptops, appliances), backlighting for buttons or panels in network equipment and industrial controls, and low-level illumination in indoor signs. Its wide viewing angle makes it suitable for applications where the light needs to be visible from various angles.
.2 Design Considerations
1. Current Limiting:Always use a series resistor or constant current driver to limit the forward current to 30mA DC or less. The circuit design must account for the forward voltage bin to ensure proper current regulation.
2. Thermal Management:Consider the 60°C/W thermal resistance. For continuous operation at high currents, ensure the PCB can dissipate heat effectively to keep the junction temperature below 125°C.
3. Optical Design:The yellow lens will affect the output color. For pure white light requirements, verify the chromaticity bin. The wide viewing angle may require diffusers or light guides to shape the beam for specific applications.
4. ESD Precautions:While not explicitly stated for this model, standard ESD handling precautions for LEDs are recommended during assembly.
. Technical Comparison and Differentiation
Compared to generic SMD LEDs, this component offers specific binning for voltage, intensity, and color, providing greater consistency for production runs. The 120-degree viewing angle is notably wider than many standard LEDs (which may be 60-90 degrees), offering broader illumination. Its compatibility with JEDEC Level 3 preconditioning and standard IR reflow profiles indicates robustness for standard surface-mount assembly lines. The explicit thermal resistance rating provides a concrete parameter for thermal design, which is often omitted in simpler datasheets.
. Frequently Asked Questions Based on Technical Parameters
Q: What resistor value should I use with a 5V supply?
A: Using Ohm's Law (R = (Vsupply - Vf) / If) and the worst-case Vf (max 3.25V at 20mA), the minimum resistor is (5 - 3.25) / 0.02 = 87.5 ohms. Use a standard value like 100 ohms or slightly higher to ensure current does not exceed 20mA for a typical LED.
Q: Can I drive this LED with a PWM signal for dimming?
A: Yes, pulsed operation is acceptable. The absolute maximum rating allows for 100mA peak current at a 1/10 duty cycle with a 0.1ms pulse width. For PWM dimming, ensure the average current over time does not exceed the 30mA DC rating, and the instantaneous current during the \"on\" pulse respects the peak rating.
Q: How does temperature affect brightness?
A: Luminous output of LEDs generally decreases as junction temperature increases. For precise brightness control over temperature, feedback or compensation may be necessary. The thermal resistance value helps calculate the expected junction temperature rise for a given operating condition.
. Practical Design and Usage Case
Case: Front Panel Status Indicator Array
In a network router, ten LTST-T180UWET LEDs are used to indicate link status for different ports. Design steps include: 1) Selecting LEDs from the same intensity bin (e.g., X1) and color bin to ensure uniform brightness and hue across the panel. 2) Designing a PCB with the recommended pad layout. 3) Using a 3.3V rail and calculating a current-limiting resistor for ~18mA per LED (e.g., (3.3V - 2.85V_typ) / 0.018A = 25 ohms). 4) Ensuring the PCB copper area around the pads is sufficient to act as a heat sink, especially if all LEDs are on continuously. 5) Following the specified reflow profile during assembly. 6) Performing a visual inspection post-assembly to check for proper soldering and alignment.
. Principle Introduction
Light-emitting diodes are semiconductor devices that emit light when an electric current passes through them. This phenomenon, called electroluminescence, occurs when electrons recombine with electron holes within the device, releasing energy in the form of photons. The color of the light is determined by the energy band gap of the semiconductor material. White LEDs are typically created by using a blue or ultraviolet LED chip coated with a phosphor material that converts some of the emitted light to longer wavelengths (yellow, red), resulting in a mixture perceived as white light. The yellow lens on this particular model may further modify the spectral output or diffuse the light.
. Development Trends
The general trend in SMD LED technology continues toward higher luminous efficacy (more light output per watt of electrical input), improved color rendering index (CRI) for white LEDs, and smaller package sizes enabling higher density layouts. There is also a focus on enhanced reliability under higher temperature operating conditions and more precise binning for color and flux to meet the demands of applications like high-resolution displays and automotive lighting. The drive for energy efficiency across all electronic devices further pushes the adoption of LEDs with optimal performance characteristics.
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. |