Bayanin Fasaha na LTPL-C16FUVM405 UV LED - 3.2x1.6x1.9mm - 3.1V - 22mW - 405nm - Takardun Fasaha na Hausa

1. Duba na Samfur

Jerin LTPL-C16 yana wakiltar ci gaba mai mahimmanci a fasahar haske mai ƙarfi, wanda aka ƙera musamman don aikace-aikacen ultraviolet (UV). Wannan samfurin tushen haske ne mai inganci da ƙaramin girma wanda ya haɗu da tsawon lokacin aiki da babban amincin da ke cikin Diodes Masu Fitowa Hasken (LEDs) tare da matakan aiki masu dacewa don maye gurbin tsarin hasken UV na al'ada. Ƙaramin siffarsa yana ba masu ƙira 'yanci mai yawa wajen haɗa hanyoyin hasken UV cikin aikace-aikacen da ke da ƙarancin sarari, yana ba da damar sabbin abubuwa a cikin masana'antu daban-daban.

1.1 Siffofi da Fa'idodi Masu Muhimmanci

Na'urar ta ƙunshi siffofi na ƙira da yawa waɗanda ke haɓaka ƙirarta da aikin ta:

• Daidaitawar Haɗa Kansa:Kunshin ya dace gaba ɗaya da kayan aikin ɗauka da sanya na atomatik, yana sauƙaƙe samarwa mai yawa, mai tsada.
• Daidaitawar Solder Reflow:An ƙera shi don jure duka hanyoyin solder reflow na infrared (IR) da tururi, waɗanda suke daidai a cikin layukan haɗa fasahar sanya saman (SMT).
• Kunshin Daidaitaccen Tsari:Bangaren ya yi daidai da ƙayyadaddun kunshin EIA (Ƙungiyar Masana'antu na Lantarki), yana tabbatar da daidaitawa mai faɗi tare da ƙa'idodin ƙira na masana'antu da hanyoyin haɗawa.
• Ƙarfin Tuƙi Kai Tsaye:LED ɗin ya dace da I.C. (Haɗaɗɗen Kewayawa), ma'ana ana iya tuƙa shi kai tsaye ta hanyar fitarwar da'irori na dabaru ko tuƙawa da yawa ba tare da buƙatar abubuwan haɗin gwiwa masu rikitarwa ba.
• Yin Biyayya ga Muhalli:Ana kera samfurin don cika ƙa'idodin samfurin kore kuma ba shi da gubar (Pb-free) daidai da umarnin Ƙuntata Abubuwa Masu Haɗari (RoHS).

1.2 Aikace-aikacen Manufa

Wannan UV LED na 405nm an yi niyya ne musamman ga aikace-aikacen da ke buƙatar tushen hasken ultraviolet na kusa mai ƙaramin girma, amintacce. Yankunan aikace-aikace na farko sun haɗa da:

• Gyaran UV:Gyaran mannewa, rufi, da tawada nan take a cikin hanyoyin masana'antu da bugu.
• Alamar UV da Lamba:Sauƙaƙe halayen photochemical don alama ko lamba akan kayan daban-daban.
• Mannewa UV:Kunna mannewa masu gyaran haske don haɗawa a cikin na'urorin lantarki, na'urorin likita, da na'urorin gani.
• Bushewar Tawada Buga:Hanzarta bushewa da saita tawadodin bugu na musamman.

2. Ma'auni na Fasaha: Fassarar Manufa Mai Zurfi

Wannan sashe yana ba da cikakken bincike kan iyakokin aiki na na'urar da halayen aiki a ƙarƙashin daidaitattun yanayin gwaji.

2.1 Matsakaicin Matsakaicin Ƙimar

Waɗannan ƙimar suna ayyana iyakokin damuwa waɗanda sama da su lalacewa na dindindin na na'urar na iya faruwa. Ba a ba da shawarar aiki a ko kusa da waɗannan iyakokin na tsawon lokaci. Duk ƙimar an ƙayyade a yanayin zafin yanayi (Ta) na 25°C.

• Rushewar Wutar Lantarki (Po):160 mW. Wannan shine matsakaicin jimlar wutar lantarki da kunshin zai iya watsawa azaman zafi.
• Halin Gaba na DC (If):40 mA. Matsakaicin halin gaba na ci gaba da za a iya amfani da shi.
• Ƙarfin Lantarki na Baya (Vr):5 V. Na'urar tana da diodi na kariya na Zener da aka gina; wuce wannan ƙarfin lantarki a cikin karkatar da baya na iya haifar da lalacewa.
• Kewayon Zazzabi na Aiki (Topr):-40°C zuwa +85°C. Kewayon zafin yanayi wanda aka ƙayyade na'urar don yin aiki.
• Kewayon Zazzabi na Ajiya (Tstg):-40°C zuwa +100°C.
• Zazzabi na Junction (Tj):100°C. Matsakaicin zafin jiki da aka halatta na guntu na semiconductor kanta.

2.2 Halayen Lantarki da Na'ura Mai Kallo

Waɗannan sigogi suna ayyana aikin al'ada na LED a ƙarƙashin daidaitattun yanayin aiki (Ta=25°C, If=20mA).

• Juyin Radiant (Φe):22 mW (Na al'ada), tare da kewayon daga 16 mW (Min) zuwa 28 mW (Max). Wannan shine jimlar ƙarfin gani da aka fitar a cikin bakan UV, wanda aka auna bisa ga ma'aunin CAS140B tare da ƙimar auna ±10%. Shi ne ma'auni mai mahimmanci don ingancin gyaran UV.
• Kusurwar Dubawa (2θ1/2):135° (Na al'ada). Wannan faɗin kusurwar dubawa tana nuna tsarin fitarwa na Lambertian, wanda ya dace don haskaka manyan wurare ko manufa daga nesa gajere.
• Matsakaicin Tsawon Tsawon (λp):405 nm (Na al'ada), kewayo daga 400 nm zuwa 410 nm. Wannan yana sanya fitarwa a cikin bakan kusa-UV (UVA). Ƙimar auna ita ce ±3 nm.
• Ƙarfin Lantarki na Gaba (Vf):3.1 V (Na al'ada), kewayo daga 2.8 V zuwa 4.0 V a 20mA. Ƙimar auna ita ce ±0.1V. Ana rarraba wannan siga don daidaiton samarwa.
• Ƙarfin Lantarki na Baya (Vr):1.2 V (Max) a halin baya (Ir) na 10µA.Bayanin Mahimmancin:Wannan gwajin shine kawai don tabbatar da aikin kariya na Zener. LED ɗinbaan ƙera shi don yin aiki a ƙarƙashin karkatar da baya. Ci gaba da halin baya na iya haifar da gazawar na'urar.

2.3 Sarrafawa da Kariya na ESD

Na'urar tana da hankali ga zubar da lantarki (ESD) da haɓakar lantarki. Hanyoyin sarrafawa daidai suna tilas: amfani da igiyoyin wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan wuyan 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. Binning System Explanation

To ensure consistent performance in application, LEDs are sorted (binned) based on key parameters post-manufacturing. The bin code is marked on the packaging.

.1 Forward Voltage (Vf) Binning

LEDs are categorized into three voltage bins at a test current of 20mA:
V1: 2.8V - 3.2V
V2: 3.2V - 3.6V
V3: 3.6V - 4.0V

.2 Radiant Flux (Φe) Binning

Optical output power is sorted into six bins at 20mA:
R4: 16 mW - 18 mW
R5: 18 mW - 20 mW
R6: 20 mW - 22 mW
R7: 22 mW - 24 mW
R8: 24 mW - 26 mW
R9: 26 mW - 28 mW

.3 Peak Wavelength (λp) Binning

The emission wavelength is sorted into two primary bins:
P4A: 400 nm - 405 nm
P4B: 405 nm - 410 nm

This binning allows designers to select LEDs matched for specific voltage requirements, optical power needs, and precise spectral output, which is crucial for applications with tight photochemical reaction thresholds.

. Performance Curve Analysis

The datasheet provides several characteristic curves that are essential for understanding device behavior under non-standard conditions.

.1 Relative Radiant Flux vs. Forward Current

This curve shows that the optical output (Φe) is approximately linear with forward current (If) within the recommended operating range. Driving the LED above the typical 20mA will increase output but also increase power dissipation and junction temperature, which must be managed through thermal design.

.2 Forward Current vs. Forward Voltage (IV Curve)

The IV curve demonstrates the exponential relationship typical of a diode. The forward voltage has a negative temperature coefficient, meaning Vf will decrease slightly as the junction temperature rises under constant current operation.

.3 Relative Radiant Flux vs. Junction Temperature

This is one of the most critical curves for design. It shows the derating of optical output as the junction temperature (Tj) increases. UV LEDs are particularly sensitive to temperature. Maintaining a low Tj through effective PCB layout, thermal vias, and possibly heatsinking is paramount to ensuring stable, long-term optical output and device reliability.

.4 Relative Emission Spectrum

The spectral distribution curve confirms the peak emission at ~405nm with a typical spectral width (Full Width at Half Maximum). This narrowband emission is ideal for targeting specific photoinitiators in curing applications.

. Mechanical and Packaging Information

.1 Outline Dimensions

The package is an ultra-compact surface-mount device. Key dimensions (in millimeters, ±0.1mm tolerance) are approximately 3.2mm in length, 1.6mm in width, and 1.9mm in height. The datasheet includes a detailed dimensional drawing showing pad locations, lens shape, and polarity indicator (typically a cathode mark).

.2 Recommended PCB Attachment Pad Layout

A land pattern design is provided for infrared or vapor phase reflow soldering. This pattern is crucial for achieving a reliable solder joint, ensuring proper self-alignment during reflow, and facilitating heat transfer away from the LED die into the PCB.

. Soldering and Assembly Guidelines

.1 Reflow Soldering Profile

A detailed reflow profile is specified for lead-free (Pb-free) solder processes. Key parameters include:
- Preheat:-200°C for up to 120 seconds.
- Peak Temperature:Maximum of 260°C.
- Time Above Liquidus:Recommended to be 10 seconds maximum, and reflow should not be performed more than twice.
The profile emphasizes a gradual ramp-up and cool-down to minimize thermal shock. The lowest possible soldering temperature that achieves a reliable joint is always recommended.

.2 Hand Soldering

If hand soldering is necessary, a soldering iron tip temperature not exceeding 300°C should be used, with contact time limited to a maximum of 3 seconds per solder joint. This should be performed only once.

.3 Cleaning

If post-assembly cleaning is required, only specified chemicals should be used. Immersing the LED in ethyl alcohol or isopropyl alcohol at room temperature for less than one minute is acceptable. Unspecified chemicals may damage the silicone lens or package material.

.4 Moisture Sensitivity and Storage

The product is classified as Moisture Sensitivity Level (MSL) 3 per JEDEC standard J-STD-020.
- Sealed Bag:Store at ≤30°C and ≤90% RH. Use within one year of the bag seal date.
- Opened Bag:Store at ≤30°C and ≤60% RH. The components must undergo soldering within 168 hours (7 days) of exposure to the factory floor environment. If the humidity indicator card turns pink (indicating >10% RH) or the exposure time is exceeded, a bake-out at 60°C for at least 48 hours is required before use. Reseal any unused parts with fresh desiccant.

. Packaging and Ordering Information

.1 Tape and Reel Specifications

The components are supplied on embossed carrier tape for automated assembly.
- Tape Dimensions:Detailed drawings specify pocket pitch, width, and cover tape dimensions.
- Reel:Standard 7-inch (178mm) reel.
- Quantity:Typically 1500 pieces per reel.
- Quality:Conforms to EIA-481-1-B specifications, with a maximum of two consecutive missing components allowed.

. Application Design and Considerations

.1 Drive Circuit Design

Critical Principle:An LED is a current-operated device, not a voltage-operated one. To ensure uniform brightness and longevity, it must be driven by a controlled current source.
- Constant Current Drive:The recommended method is using a dedicated LED driver IC or a circuit that provides a stable constant current.
- Current Limiting Resistor:For simple applications with a stable voltage supply (Vcc), a series resistor (R = (Vcc - Vf) / If) is the minimum requirement. This is essential when connecting multiple LEDs in parallel to prevent current hogging by the LED with the lowest Vf. Each parallel branch should ideally have its own current-limiting resistor.

.2 Thermal Management

Effective heat sinking is non-negotiable for performance and reliability. Design considerations include:
- Using a PCB with sufficient copper area (thermal pads) connected to the LED's thermal pad.
- Implementing thermal vias under the LED's footprint to conduct heat to inner or bottom copper layers.
- Ensuring the overall system design allows for heat dissipation to prevent the junction temperature from exceeding its maximum rating, especially when operating at higher currents or in elevated ambient temperatures.

.3 Application Scope and Safety

The device is intended for standard commercial and industrial electronic equipment. It is not designed or qualified for safety-critical applications where failure could risk life or health (e.g., aviation control, medical life-support, transportation safety systems). For such applications, consultation with the manufacturer for specialized products is required.

. Technical Comparison and Differentiation

The LTPL-C16FUVM405 differentiates itself in the UV LED market through its combination of attributes:
- Ultra-Compact Size:Its miniature 3.2x1.6mm footprint enables integration into very small products or dense arrays.
- High Efficiency:Delivering up to 28mW of optical power from a low 20mA drive current represents good electrical-to-optical conversion efficiency for its class.
- Wide Viewing Angle:The 135° viewing angle provides broad, even illumination ideal for curing or exposing larger areas without complex optics.
- Robust Packaging:Compatibility with standard SMT reflow processes and MSL3 rating make it suitable for mainstream, high-volume electronics manufacturing.

. Frequently Asked Questions (Based on Technical Parameters)

Q1: Can I drive this LED directly from a 5V microcontroller pin?
A:No. A 5V supply with a simple series resistor calculation (R = (5V - 3.1V) / 0.02A = 95Ω) might seem feasible, but it is not recommended. The microcontroller pin has a current sourcing limit (often 20-40mA max total for the chip) and is not a stable voltage source under load. Use a dedicated driver circuit or transistor.

Q2: Why is the reverse voltage rating important if I shouldn't operate it in reverse?
A:The rating indicates the level of built-in protection against accidental reverse connection during assembly or testing. It defines the threshold before the internal Zener diode conducts heavily, potentially protecting the LED chip from immediate failure due to a wiring mistake, but sustained reverse bias is harmful.

Q3: My curing process seems slow. Can I increase the drive current above 20mA?
A:You can, but you must operate within the Absolute Maximum Rating of 40mA. Increasing current increases optical output but also increases heat generation exponentially (Power = Vf * If). Youmustperform thorough thermal analysis and design to ensure the junction temperature (Tj) stays below 100°C. Driving at higher currents without thermal management will reduce output (due to thermal derating), shorten lifespan, and may cause premature failure.

Q4: What is the difference between Radiant Flux (mW) and Luminous Flux (lm)?
A:Radiant flux measures total opticalpoweracross all wavelengths (Watts). Luminous flux measures perceivedbrightnessby the human eye (lumens), weighted by the photopic response curve. Since this is a UV LED emitting light invisible to humans, its performance is correctly specified in Radiant Flux (mW), which correlates directly to its effectiveness in photochemical processes like curing.

. Practical Design and Usage Case Study

Scenario: Designing a compact UV curing station for a desktop 3D printer resin tank.
1. Array Design:Multiple LTPL-C16FUVM405 LEDs would be arranged in a grid on a PCB to uniformly illuminate the tank area. Their wide 135° viewing angle reduces the number of LEDs needed compared to narrower-angle devices.
2. Drive Circuit:A constant-current LED driver IC would be selected to power the array, capable of delivering a stable 20mA per LED string. LEDs would be connected in a series-parallel configuration appropriate for the driver's voltage and current compliance limits.
3. Thermal Design:The PCB would be fabricated on a 1.6mm FR4 board with 2oz copper. A large continuous copper pour on the top and bottom layers, connected by an array of thermal vias under each LED footprint, would act as the primary heatsink. The PCB might be mounted to an aluminum chassis for additional cooling.
4. Optics:While the wide angle is beneficial, a simple diffuser might be placed over the array to ensure perfectly even illumination across the curing surface.
5. Control:The driver IC would be controlled by the system's microcontroller to pulse or dim the UV array as required by the curing recipe, managing exposure dose.

. Operating Principle and Technology Trends

.1 Basic Operating Principle

A Light Emitting Diode (LED) is a semiconductor p-n junction diode. 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 this specific device, the semiconductor material (likely based on indium gallium nitride - InGaN) is engineered so that this energy is released as photons in the near-ultraviolet spectrum, with a peak wavelength of approximately 405 nanometers. The built-in Zener diode provides a controlled breakdown path for reverse voltages, offering basic protection for the delicate LED junction.

.2 Industry Trends

The solid-state lighting industry, including UV LEDs, continues to evolve along several key trajectories:
- Increased Efficiency (WPE - Wall-Plug Efficiency):Ongoing research aims to extract more optical power (mW) from the same electrical input power (mW), reducing heat generation and energy consumption.
- Higher Power Density:Developing packages and chip technologies that can handle higher drive currents and dissipate more heat, enabling smaller LEDs to deliver more UV power.
- Shorter Wavelengths:While this product is in the UVA band (405nm), significant R&D effort is focused on producing reliable and efficient LEDs deeper into the UV spectrum (UVB and UVC) for sterilization, purification, and advanced medical applications.
- Improved Thermal Packaging:Advancements in package materials (e.g., ceramic substrates) and thermal interface technologies to lower thermal resistance from the junction to the ambient environment, which is critical for maintaining performance and lifetime.
- Intelligent Integration:Trends toward combining UV LEDs with onboard sensors (for dose monitoring) or drivers for smarter, more controllable light engines.