LTST-C295TGKRKT LED Mai Launuka Biyu Datasheet - Tsayi 0.55mm - Kore 3.8V / Ja 2.4V - 76mW / 75mW - Takardun Fasaha na Hausa

1. Bayanin Samfur

LTST-C295TGKRKT LED ne mai launuka biyu, na'urar da ake hawa a saman (SMD), wanda aka tsara don aikace-aikacen lantarki na zamani da ke buƙatar girman ƙarami da alamun haske mai ƙarfi. Wannan ɓangaren ya haɗa guntayen semiconductor guda biyu daban-daban a cikin fakitin siriri guda ɗaya: guntun InGaN (Indium Gallium Nitride) don fitar da hasken kore da guntun AlInGaP (Aluminum Indium Gallium Phosphide) don fitar da hasken ja. Manufar ƙirarsa ta asali ita ce samar da ingantaccen mafita mai ceton sarari don nuna matsayi, hasken baya, da hasken panel inda bambancin launi yake da muhimmanci.

Babban fa'idodin wannan LED sun haɗa da tsayinsa na musamman mai ƙanƙanta na 0.55mm, wanda ke sauƙaƙe amfani a cikin na'urorin masu amfani masu siriri da na'urorin hannu. Yana bin umarnin ROHS (Ƙuntata Abubuwa Masu Illa), wanda ya sa ya zama zaɓi mai kula da muhalli. An daidaita fakitin bisa ga ƙa'idodin EIA (Ƙungiyar Masana'antu na Lantarki), yana tabbatar da dacewa da kayan aikin tara da sanyawa ta atomatik da daidaitattun hanyoyin siyar da infrared, wanda ke sauƙaƙe samarwa mai yawa.

Kasuwarmar da aka yi niyya ta ƙunshi kewayon kayan aikin lantarki, gami da amma ba'a iyakance ga na'urorin sarrafa ofis, kayan aikin sadarwa, na'urorin gida, da nau'ikan na'urorin lantarki masu amfani inda ake buƙatar nuna matsayi mai launuka biyu (misali, kunna / tsaye, matsayin caji, ayyukan cibiyar sadarwa) a cikin ƙaramin ƙafa.

2. Bincike Mai zurfi na Sigogi na Fasaha

2.1 Matsakaicin Matsakaicin Matsakaici

Waɗannan ƙididdiga suna ayyana iyakokin damuwa waɗanda sama da su lalacewar dindindin na na'urar na iya faruwa. Ba a garantin aiki a ƙarƙashin ko a waɗannan iyakokin ba. Don guntun kore, matsakaicin ci gaba na DC na gaba shine 20mA, tare da matsakaicin igiyar gaba na 100mA da aka halatta a ƙarƙashin yanayin bugun jini (1/10 aikin aiki, faɗin bugun 0.1ms). Guntun ja yana ba da damar mafi girman wutar lantarki DC na 30mA amma ƙaramin ƙarfin kololuwa na 80mA. Matsakaicin raguwar wutar lantarki shine 76mW don guntun kore da 75mW don guntun ja, mai mahimmanci don sarrafa zafin jiki a cikin PCBs masu cike da juna. An ƙididdige na'urar don kewayon zafin aiki na -20°C zuwa +80°C kuma tana iya jure yanayin ajiya daga -30°C zuwa +100°C. Hakanan an cancanta don siyar da infrared mara gubar tare da matsakaicin zafin jiki na 260°C har zuwa dakika 10.

2.2 Halayen Lantarki da Na Gani

Ana auna waɗannan sigogi a daidaitaccen yanayin yanayi na 25°C da igiyar gaba (I_F) na 20mA, wanda shine wurin aiki na yau da kullun.

Ƙarfin Hasken Hasken (I_V):Wannan shine ma'aunin ƙarfin hasken da LED ke fitarwa. Don guntun kore, mafi ƙarancin ƙarfi shine 112 millicandelas (mcd), tare da kewayon na yau da kullun wanda ya kai matsakaicin 450 mcd. Guntun ja yana da mafi ƙarancin 45 mcd da matsakaicin 180 mcd. Faɗin kewayon yana nuna cewa ana samun na'urar a cikin kwandon haske daban-daban.

Kusurwar Dubawa (2θ_1/2):Duk launuka suna da faɗin kusurwar dubawa na digiri 130 (na yau da kullun). Wannan shine cikakken kusurwar da ƙarfin haske ya ragu zuwa rabin ƙimarsa a tsakiyar axis, yana sa LED ya dace da aikace-aikacen inda ganin daga kusurwoyi masu nisa ke da mahimmanci.

Halayen Tsawon Tsawon Tsawon:Matsakaicin tsayin tsayin fitarwa na guntun kore (λ_P) shine 530nm, tare da kewayon tsayin tsayi (λ_d) daga 520.0nm zuwa 535.0nm. Matsakaicin kololuwar guntun ja yana a 639nm, tare da kewayon tsayin tsayi daga 624.0nm zuwa 638.0nm. Ramin rabin layin gani (Δλ) yana kusan 35nm don kore da 20nm don ja, yana bayyana tsaftar gani na hasken da aka fitar.

Ƙarfin Gaba (V_F):Wannan shine raguwar wutar lantarki a kan LED lokacin aiki a ƙayyadadden wutar lantarki. V na guntun kore_Fya kewayo daga 2.8V (ƙarami) zuwa 3.8V (matsakaici). Guntun ja yana da ƙaramin V_F, ya kewayo daga 1.8V zuwa 2.4V. Wannan bambanci yana da mahimmanci ga ƙirar da'ira, musamman lokacin tuƙi duk launuka daga tushen wutar lantarki guda ɗaya, saboda yana iya buƙatar masu hana wutar lantarki daban-daban.

Juyin Juya Baya (I_R):Matsakaicin igiyar juzu'i na baya shine 10µA ga duka guntayen lokacin da aka yi amfani da wutar lantarki ta baya (V_R) na 5V. An bayyana a sarari cewa ba a tsara na'urar don aikin baya ba; wannan sigogi ne kawai don dalilai na gwaji.

3. Bayanin Tsarin Binning

Don tabbatar da daidaito a cikin samarwa mai yawa, ana rarraba LEDs zuwa kwandon aiki. LTST-C295TGKRKT yana amfani da tsarin binning don ƙarfin haske da tsayin tsayi.

3.1 Binning Ƙarfin Hasken Hasken

Gakoreguntu, ana kiran kwandon R, S, da T, suna rufe kewayon ƙarfi na 112.0-180.0 mcd, 180.0-280.0 mcd, da 280.0-450.0 mcd, bi da bi. Gajaguntu, kwandon P, Q, da R sun rufe 45.0-71.0 mcd, 71.0-112.0 mcd, da 112.0-180.0 mcd. Ana amfani da jurewar +/-15% ga kowane kwandon ƙarfi.

3.2 Binning Tsawon Tsawon Tsawon

Ya shafi guntun kore, kwandon tsayin tsayi AP, AQ, da AR sun dace da kewayon tsayin tsayi na 520.0-525.0nm, 525.0-530.0nm, da 530.0-535.0nm. Jurewar kowane kwandon tsayin tsayi yana da ƙaramin +/-1nm, yana tabbatar da daidaiton launi a cikin zaɓaɓɓen kwandon.

4. Binciken Lanƙwasa Aiki

Yayin da aka ambaci takamaiman lanƙwasa a cikin takardar bayanan (shafuka 6-7), abubuwan da suke nufi suna daidaitacce.Lanƙwasa I-V (Wutar Lantarki-Ƙarfin Lantarki)zai nuna alaƙar ma'auni na yau da kullun na diodes, tare da gwiwar ƙarfin gaba yana da girma ga guntun kore (InGaN) fiye da guntun ja (AlInGaP).dangantakar ƙarfin haske da igiyar gabalanƙwasa zai nuna cewa fitar da haske yana ƙaruwa kusan layi daya tare da wutar lantarki har zuwa wani lokaci, bayan haka inganci yana raguwa saboda dumama.dangantakar ƙarfin haske da yanayin yanayilanƙwasa yana da mahimmanci; ga yawancin LEDs, fitar da haske yana raguwa yayin da zafin haɗin yake tashi. Dole ne masu ƙira su yi la'akari da wannan raguwar zafin jiki, musamman lokacin aiki kusa da matsakaicin ƙididdiga ko a cikin yanayin zafi mai girma.rarrabawar ganilanƙwasa zai nuna ƙananan rukunin fitarwa a kusa da tsayin tsayin kololuwa, tare da band ɗin kore ya fi ja fadi.

5. Bayanin Injiniya da Fakitin

5.1 Girman Fakitin da Polarity

LED yana zuwa a cikin daidaitaccen fakitin SMD. Babban fasalin injiniya shine tsayinsa na 0.55mm. An ayyana aikin fil a sarari: Fil 1 da 3 suna don anode/cathode na kore, kuma Fil 2 da 4 suna don anode/cathode na ja. An ba da ainihin sawun ƙafa da zanen girma a cikin takardar bayanan, wanda ke da mahimmanci ga ƙirar ƙirar ƙasa ta PCB. Ruwan tabarau yana da tsabta, yana ba da damar ainihin launin guntu ya bayyana.

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A suggested solder pad layout is included to ensure reliable soldering and proper mechanical stability. Adhering to these recommendations helps prevent tombstoning (component standing up on one end) during reflow and ensures good solder fillet formation for strong joints.

. Soldering and Assembly Guidelines

.1 Reflow Soldering Profile

The device is compatible with infrared reflow soldering processes, which is the standard for SMD assembly. A suggested reflow profile for lead-free solder is provided, conforming to JEDEC standards. Key parameters include a pre-heat stage (typically 150-200°C for up to 120 seconds), a controlled ramp to a peak temperature not exceeding 260°C, and a time above liquidus (TAL) where the peak temperature is maintained for a maximum of 10 seconds. The profile aims to minimize thermal shock while ensuring complete solder joint formation.

.2 Handling and Storage Precautions

ESD (Electrostatic Discharge) Sensitivity:LEDs are susceptible to damage from static electricity. It is strongly recommended to handle them in an ESD-protected environment using wrist straps and grounded equipment.

Moisture Sensitivity:While the device is shipped in a moisture-proof bag with desiccant, once the bag is opened, the components should be used within one week if stored in ambient conditions (<30°C, <60% RH). For longer storage after opening, they should be kept in a sealed container with desiccant or in a nitrogen atmosphere. Components stored out of the original packaging for more than a week require a baking process (approximately 60°C for at least 20 hours) before soldering to remove absorbed moisture and prevent \"popcorning\" during reflow.

.3 Cleaning

If cleaning after soldering is necessary, only specified solvents should be used. Immersing the LED in ethyl alcohol or isopropyl alcohol at room temperature for less than one minute is recommended. Unspecified chemicals may damage the plastic package or lens.

. Packaging and Ordering Information

The LTST-C295TGKRKT is supplied in industry-standard packaging for automated assembly. The components are placed on 8mm wide embossed carrier tape, which is then wound onto 7-inch (178mm) diameter reels. Each full reel contains 4000 pieces. For smaller quantities, a minimum packing of 500 pieces is available. The tape and reel specifications comply with ANSI/EIA-481. The top cover tape seals the component pockets, and the reel includes orientation indicators for correct machine loading.

. Application Notes and Design Considerations

.1 Typical Application Circuits

Each color chip (green and red) must be driven independently. A series current-limiting resistor is mandatory for each LED to set the desired forward current (typically 20mA). The resistor value is calculated using Ohm's Law: R = (V_supply- V_F) / I_F. Due to the different forward voltages of the green and red chips, using a common supply voltage will result in different resistor values for each color to achieve the same current. For example, with a 5V supply: R_green= (5V - 3.3V) / 0.02A = 85Ω; R_red= (5V - 2.1V) / 0.02A = 145Ω (using typical V_Fvalues).

.2 Thermal Management

Although power dissipation is low, proper thermal design on the PCB is still important for longevity and stable performance. Ensure adequate copper area around the solder pads to act as a heat sink, especially if operating at high ambient temperatures or near maximum current ratings. Avoid placing heat-generating components directly adjacent to the LED.

.3 Optical Design

The wide 130-degree viewing angle makes this LED suitable for applications requiring broad visibility. For more directed light, external lenses or light guides can be used. The water-clear lens provides the purest color from the chip, but diffused lenses or coatings can be applied externally if a softer, more uniform appearance is desired.

. Technical Comparison and Differentiation

The primary differentiator of the LTST-C295TGKRKT is its dual-color capability in an ultra-thin 0.55mm package. Compared to using two separate single-color LEDs, it saves PCB space and simplifies assembly. The use of InGaN for green offers higher efficiency and brightness compared to older technologies like GaP. The AlInGaP red chip provides high efficiency and excellent color purity. Its compatibility with standard reflow processes and tape-and-reel packaging makes it a cost-effective choice for high-volume manufacturing compared to more exotic or manually assembled solutions.

. Frequently Asked Questions (FAQ)

Q: Can I drive both the green and red LEDs simultaneously?

A: Yes, but they must be driven by separate circuits (i.e., independent current paths with their own current-limiting resistors). Driving them in parallel from a single resistor is not recommended due to their different forward voltage characteristics, which would cause an uneven current distribution.

Q: What is the meaning of the bin codes (R, S, T, AP, AQ, etc.) in the part number or ordering?

A: These codes specify the performance grade of the LED in terms of luminous intensity and dominant wavelength. For consistent appearance in a product, specifying and using LEDs from the same bin is crucial. Consult the supplier for available bins.

Q: Is a heat sink required for this LED?

A: Generally, no, due to its low power dissipation (≤76mW). However, good PCB thermal design practices, such as using thermal relief pads connected to a ground plane, are recommended for optimal lifetime, especially in high-temperature environments.

Q: Can I use this LED for reverse voltage indication?

A: No. The datasheet explicitly states the device is not designed for reverse operation. Applying a reverse voltage exceeding 5V may cause damage. For reverse polarity protection, an external diode should be used in the circuit.

. Practical Design and Usage Examples

Case Study 1: Portable Device Status Indicator:In a smartphone or tablet, this LED could be used near a USB port. The green chip could indicate \"fully charged,\" while the red chip could indicate \"charging in progress.\" The ultra-thin profile allows it to fit within the tight mechanical constraints of modern devices.

Case Study 2: Industrial Control Panel:On a machine operator's panel, the dual-color LED can provide clear state information. For example, green for \"system ready,\" red for \"fault or alert.\" The wide viewing angle ensures the status is visible from various positions on the factory floor.

Case Study 3: Automotive Interior Lighting:While not for primary illumination, it could be used for subtle button backlighting or accent lighting, with the color changing based on mode (e.g., normal vs. night mode). The robust packaging and qualified soldering profile make it suitable for automotive electronic modules, though specific automotive-grade qualification may be required.

. Technology Principle Introduction

The operation of an LED is based on electroluminescence in a semiconductor p-n junction. When a forward voltage is applied, electrons from the n-type region and holes from the p-type region are injected into the active region. When these charge carriers recombine, they release energy in the form of photons (light). The color (wavelength) of the emitted light is determined by the bandgap energy of the semiconductor material. TheInGaNmaterial system has a wider bandgap, enabling the emission of green, blue, and white light. TheAlInGaPmaterial system is particularly efficient for producing red, orange, and yellow light. By housing two such chips in one package, a compact dual-color source is created.

. Industry Trends and Development

The trend in SMD LEDs continues toward higher efficiency (more light output per watt), smaller package sizes, and greater integration. Dual-color and RGB (red-green-blue) LEDs are becoming more common as they enable dynamic color mixing and more sophisticated user interfaces. There is also a strong drive toward improved reliability and performance under higher temperature conditions, catering to automotive and industrial markets. Furthermore, the push for miniaturization, as seen in this 0.55mm high package, supports the development of ever-thinner consumer electronics. The underlying semiconductor materials, particularly for green and blue, are seeing ongoing research to improve their efficiency, a challenge historically known as the \"green gap.\"