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LTS-4801JR 0.39-inch Super Red LED Display Datasheet - Tsawon Lamba 10.0mm - Karfin Wutar Gaba 2.6V - Wutar Lantarki 70mW - Takardun Fasaha na Hausa

Cikakken bayanin fasaha na LTS-4801JR, na'urar nuni ta LED mai launin ja mai tsananin ja mai lamba daya da sassa bakwai. Ya haɗa da ƙayyadaddun bayanai, tsarin fil, ƙima, halaye, gwaje-gwajen dogaro, da kuma gargaɗin aikace-aikace.
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Murfin Takardar PDF - LTS-4801JR 0.39-inch Super Red LED Display Datasheet - Tsawon Lamba 10.0mm - Karfin Wutar Gaba 2.6V - Wutar Lantarki 70mW - Takardun Fasaha na Hausa
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Gida » Takaddun » LTS-4801JR 0.39-inch Super Red LED Display Datasheet - Tsawon Lamba 10.0mm - Karfin Wutar Gaba 2.6V - Wutar Lantarki 70mW - Takardun Fasaha na Hausa

Teburin Abubuwan Ciki

1. Bayanin Samfur

LTS-4801JR na'urar nuni ce ta lamba daya, mai sassa bakwai don nuna lambobi da haruffa. Tana da tsayin lamba 0.39 inches (10.0 millimeters), wanda ya sa ta dace da aikace-aikacen da ke buƙatar karatun lambobi masu tsayi matsakaici da bayyananne. Na'urar tana amfani da fasahar semiconductor na AlInGaP (Aluminum Indium Gallium Phosphide) don samar da fitarwa mai launin ja mai tsananin ja. Kunshin yana gabatar da fuska mai launin toka tare da alamomin sassa fari, yana ba da bambanci mai girma don kyakkyawan karatun haruffa. An ƙera wannan na'urar nuni a matsayin nau'in anode gama gari, wanda shine tsari na gama gari don sauƙaƙe da'irar tuƙi a cikin aikace-aikacen da ake haɗawa da yawa.

1.1 Siffofi da Fa'idodi Masu Muhimmanci

.2 Target Applications and Market

This display is intended for use in ordinary electronic equipment. Typical application areas include instrumentation panels, consumer electronics, industrial control readouts, test and measurement equipment, and household appliances where a clear numeric display is required. It is suitable for applications where reliability, readability, and low-power operation are key considerations. The datasheet explicitly cautions against using this device in safety-critical systems (e.g., aviation, medical life-support) without prior consultation, indicating its primary market is commercial and industrial electronics.

. Technical Specifications and Objective Interpretation

.1 Absolute Maximum Ratings

These ratings define the limits beyond which permanent damage to the device may occur. Operating the display continuously at or near these limits is not recommended.

.2 Electrical & Optical Characteristics

These are typical performance parameters measured at an ambient temperature (Ta) of 25°C.

. Binning and Grading System

The datasheet indicates that the LTS-4801JR is \"Categorized for Luminous Intensity.\" This implies a binning process where displays are sorted based on their measured light output at a standard test current (typically 1mA or 20mA). This ensures that when multiple digits are used side-by-side, their brightness appears uniform to the user. Designers should specify if tight intensity matching is required for their application. The document does not specify detailed bin codes or thresholds for wavelength (color) or forward voltage, suggesting primary sorting is based on luminous intensity.

. Performance Curve Analysis

While the provided text excerpt references \"Typical Electrical / Optical Characteristics Curves,\" the specific graphs are not included in the text. Typically, such a datasheet would include the following essential curves for design analysis:

Designers should consult the full PDF for these graphs to make accurate predictions about performance under specific operating conditions.

. Mechanical and Package Information

.1 Package Dimensions

The display has a standard through-hole DIP (Dual In-line Package) form factor. Key dimensional notes include:

.2 Pin Configuration and Circuit Diagram

The LTS-4801JR is a 10-pin device with a common anode configuration. The internal circuit diagram shows all seven segments (A-G) and the decimal point (DP) with their cathodes connected to individual pins. The anodes for all segments are connected together internally and brought out to two pins (Pin 3 and Pin 8), which are also internally connected. This allows for flexibility in PCB layout and power connection.

Pinout:

: Cathode G

: Cathode F

: Common Anode (internally tied to Pin 8)

: Cathode E

: Cathode D

: Cathode D.P. (Decimal Point)

: Cathode C

: Common Anode (internally tied to Pin 3)

: Cathode B

: Cathode A

. Soldering and Assembly Guidelines

.1 Automated Soldering (Wave/Reflow)

The recommended condition is 260°C for 5 seconds, measured 1.6mm (1/16 inch) below the seating plane of the package. The temperature of the component body itself must not exceed its maximum rating during this process.

.2 Manual Soldering

For hand soldering, a temperature of 350°C ±30°C can be used, but the soldering time must be limited to 5 seconds per pin, again measured from 1.6mm below the seating plane. Care must be taken to avoid prolonged heat exposure.

.3 Storage Conditions

While not explicitly stated for storage, the operating and storage temperature range is -35°C to +85°C. It is good practice to store components in a dry, controlled environment to prevent moisture absorption which can cause \"popcorning\" during soldering.

. Reliability Testing

The device undergoes a comprehensive suite of reliability tests based on military (MIL-STD), Japanese (JIS), and internal standards. This ensures robustness under various environmental stresses.

. Application Notes and Design Considerations

.1 Critical Application Cautions

.2 Typical Application Circuits

For a common anode display like the LTS-4801JR, the anodes (Pins 3 & 8) are connected to a positive supply voltage (VCC). Each cathode pin is connected to a current sink. This can be achieved using:

  1. Transistor Sinks:NPN transistors or N-channel MOSFETs controlled by a microcontroller.
  2. Integrated Driver ICs:Dedicated LED driver chips or microcontroller port pins with sufficient sink current capability (remembering the 25mA per segment limit). A current-limiting resistor is typically placed in series with each segment or in the common anode path when using a voltage source, but a constant current circuit is superior.

For multiplexing multiple digits, the common anodes of different digits are switched sequentially at a high frequency, while the appropriate cathode patterns are displayed for each digit. This reduces the number of required I/O pins.

. Technical Comparison and Differentiation

The LTS-4801JR differentiates itself through several key attributes:

. Frequently Asked Questions (Based on Technical Parameters)

Q: Can I drive this display directly from a 5V microcontroller pin?

A: Not directly for sinking current. A microcontroller pin can typically sink 20-25mA, which is at the absolute maximum for one segment. This leaves no safety margin and risks damaging both the LED and the microcontroller. It is always better to use a transistor or driver IC. For sourcing current (to the common anode), a pin may not supply enough current for all segments lit simultaneously (7*20mA=140mA).

Q: Why are there two common anode pins (3 and 8)?

A> They are internally connected. This provides layout flexibility, allows for connecting the anode from both sides of the PCB for lower resistance, and can help in heat dissipation by using both pins.

Q: What is the difference between Peak Wavelength and Dominant Wavelength?

A: Peak Wavelength (λp) is the physical peak of the light emission spectrum. Dominant Wavelength (λd) is calculated based on the human eye's color response (CIE curve) and represents the perceived color. They are often close but not identical.

Q: How do I calculate the series resistor value?

A> If using a simple voltage source (Vsupply), the formula is R = (Vsupply- VF) / IF. Use the maximum VFfrom the datasheet (2.60V) to ensure minimum current is met. For example, with a 5V supply and desired IFof 20mA: R = (5V - 2.6V) / 0.02A = 120 Ohms. Always recalculate for different supply voltages and currents.

. Practical Design and Usage Example

Scenario: Designing a 4-digit voltmeter readout.

  1. Component Selection:Use four LTS-4801JR displays. Ensure they are from the same intensity bin if uniform brightness is critical.
  2. Drive Method:Implement multiplexing. Connect all corresponding segment cathodes (A, B, C,... DP) together across the four displays. Use four NPN transistors (e.g., 2N3904) to control the common anode of each digit individually.
  3. Current Control:Place a single current-limiting resistor in the common path of the transistor collectors (before the anodes). Since only one digit is lit at a time, the resistor value is calculated for the total current of one digit (e.g., 8 segments * 5mA each = 40mA). Alternatively, use a constant current driver IC for each cathode line for better accuracy.
  4. Microcontroller Interface:Use 7-8 microcontroller pins for the segment patterns (cathodes) and 4 pins to control the digit select transistors (anodes).
  5. Software:In the main loop, sequentially turn on one digit transistor, output the segment pattern for that digit, wait a short time (1-5ms), then move to the next digit. The refresh rate should be above 60Hz to avoid flicker.
  6. Protection:Add small-value resistors (e.g., 100Ω) in series with the base of each transistor and the microcontroller pins to limit current. Ensure the power supply is clean and free of spikes.

. Operating Principle

A Light Emitting Diode (LED) is a semiconductor p-n junction diode. When a forward voltage exceeding the diode's threshold (VF) is applied, electrons from the n-type material recombine with holes from the p-type material in the depletion region. This recombination event releases energy. In standard diodes, this energy is primarily thermal. In LED materials like AlInGaP, the bandgap energy of the semiconductor is such that the released energy is in the form of photons (light). The specific wavelength (color) of the light is directly determined by the bandgap energy of the semiconductor material. AlInGaP has a bandgap that produces photons in the red to amber part of the visible spectrum. The seven-segment display simply packages multiple such LED chips (one per segment and the decimal point) into a standard arrangement, with their electrical connections brought out to pins for external control.

. Technology Trends

The use of AlInGaP represents an advancement over earlier LED materials for red/orange colors. Current trends in display technology relevant to such components include:

Despite these trends, discrete seven-segment displays like the LTS-4801JR remain highly relevant for applications requiring simple, reliable, low-cost, and highly readable numeric output where a full graphic display is unnecessary.

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.