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LSHD-7501 LED Display Datasheet - 0.3-inch Digit Height - AlInGaP Red - 2.6V Forward Voltage - 70mW Power Dissipation - Takardun Fasaha na Hausa

Takardun bayanan fasaha na LSHD-7501, mai nuni LED ja na lamba daya mai tsawon 0.3-inch na AlInGaP, mai haske mai ƙarfi, kusurwar kallo mai faɗi, da kuma kunshin da ba shi da gubar. Ya haɗa da ƙayyadaddun bayanai, ƙimar aiki, da jagororin aikace-aikace.
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Gida » Takaddun » LSHD-7501 LED Display Datasheet - 0.3-inch Digit Height - AlInGaP Red - 2.6V Forward Voltage - 70mW Power Dissipation - Takardun Fasaha na Hausa

1. Bayyani Game da Samfur

LSHD-7501 na'urar nuni ce ta LED mai lamba daya, mai sassa bakwai da ma'auni. Tana da tsayin lamba 0.3 inches (7.62 mm), wanda ya sa ta dace da aikace-aikacen da ke buƙatar karanta lambobi masu tsayi matsakaici da bayyananne. Na'urar tana amfani da ƙwayoyin LED ja na AlInGaP (Aluminum Indium Gallium Phosphide) masu ci gaba waɗanda aka girma akan tushen GaAs. Wannan fasahar kayan tana da sanin gaske saboda ingantacciyar aiki da kyakkyawan aikin haske a cikin bakan ja. Nunin yana nuna fuska mai launin toka mai haske tare da sassa fari, yana ba da bayyananniyar bambanci wanda ke haɓaka iya karantawa a ƙarƙashin yanayin haske daban-daban.

1.1 Muhimman Siffofi

.2 Device Identification

The part number LSHD-7501 specifies a common anode configuration with a right-hand decimal point. The common anode design simplifies driving circuitry in many microcontroller-based applications, where sinking current is often more straightforward.

. Technical Parameters: In-Depth Objective Interpretation

.1 Electrical & Optical Characteristics

The performance of the LSHD-7501 is defined under standard test conditions at an ambient temperature (Ta) of 25°C. Key parameters include:

.2 Absolute Maximum Ratings

These are stress limits that must not be exceeded, even momentarily, to prevent permanent damage.

.3 Binning System Explanation

The datasheet explicitly states the device is \"categorized for luminous intensity.\" This implies a binning process where displays are sorted based on measured light output at a standard test current. Using binned parts ensures consistency in multi-digit displays, preventing some digits from appearing brighter or dimmer than others. Designers should specify or verify the intensity bin when ordering for critical applications requiring uniform appearance.

. Performance Curve Analysis

While specific graphical data is referenced in the PDF (\"Typical Electrical / Optical Characteristics Curves\"), the textual data allows for analysis of key relationships:

. Mechanical & Package Information

.1 Package Dimensions

The display's physical outline and pin spacing are defined in a dimensional drawing. Key notes include: all dimensions in millimeters with a standard tolerance of ±0.25mm, pin tip shift tolerance of ±0.40 mm, and a recommended PCB hole diameter of 1.0 mm for the leads. Quality control points address segment integrity (foreign materials, bubbles), reflector straightness, and surface contamination.

.2 Pin Connection and Circuit Diagram

The device has a 10-pin single-row configuration. The internal circuit diagram shows a common anode structure, where the anodes of all LED segments are connected internally to two pins (1 and 6). Each segment cathode (A-G and DP) has its own dedicated pin. This configuration is verified by the pin connection table:
: Common Anode, 2: Cathode F, 3: Cathode G, 4: Cathode E, 5: Cathode D, 6: Common Anode, 7: Cathode DP, 8: Cathode C, 9: Cathode B, 10: Cathode A.

. Soldering & Assembly Guidelines

.1 Soldering Profile

Two methods are specified:
Auto Soldering (Wave/Reflow):°C for 5 seconds at 1/16 inch (1.6mm) below the seating plane.
Manual Soldering:°C ± 30°C for a maximum of 5 seconds.
Adherence to these time-temperature profiles is critical to prevent thermal damage to the LED chips, the epoxy package, and the internal wire bonds.

.2 Application Cautions & Design Considerations

The datasheet provides essential design and usage warnings:
Circuit Design:Constant current driving is strongly recommended over constant voltage to ensure consistent brightness and longevity. The driver circuit must be designed to accommodate the full range of forward voltage (VF= 2.10V to 2.60V). Protection against reverse voltages and transient spikes during power cycling is mandatory to prevent degradation.
Thermal Management:The safe operating current must be derated based on the maximum ambient temperature. Exceeding current or temperature ratings leads to severe light output degradation or catastrophic failure.
Application Scope:The display is intended for standard commercial/consumer electronics. It is not designed or qualified for safety-critical applications (aviation, medical life-support, etc.) without prior consultation and additional qualification.

. Reliability Testing

The device undergoes a comprehensive suite of reliability tests based on military (MIL-STD), Japanese (JIS), and internal standards. Key tests include:
Operation Life (RTOL): hours at maximum rated current.
Environmental Stress:High Temperature/Humidity Storage (500 hrs at 65°C/90-95% RH), High/Low Temperature Storage (1000 hrs at 105°C and -35°C), Temperature Cycling, and Thermal Shock.
Process Robustness:Solder Resistance and Solderability tests. These tests validate the product's ability to withstand assembly processes and long-term operational stresses in various environments.

. Application Suggestions

.1 Typical Application Scenarios

.2 Design Considerations and Common Questions

Q: How do I drive this display with a microcontroller?
A: For a common anode display, connect the common pins (1 & 6) to a positive supply voltage (through a current-limiting resistor or, better, a transistor switch). Connect each cathode pin (A-G, DP) to a microcontroller GPIO pin configured as an output. To illuminate a segment, set its corresponding cathode pin to a logic LOW (sink current). Use a driver IC or transistor array if the microcontroller cannot sink the total segment current.

Q: What value current-limiting resistor should I use?
A: Use Ohm's Law: R = (Vsupply- VF) / IF. Assume the worst-case VF(2.60V) to ensure sufficient current. For example, with a 5V supply and a target IFof 10mA: R = (5V - 2.6V) / 0.01A = 240 Ω. Use the nearest standard value (e.g., 220 Ω or 270 Ω) and calculate the actual current. A constant current driver is preferred for precision.

Q: Can I multiplex multiple digits?
A: Yes, this display is suitable for multiplexing. You would connect the segment cathodes in parallel across all digits and then control each digit's common anode individually, turning on only one digit at a time at a high frequency. The peak current per segment can be higher in this mode (up to the 90mA pulsed rating), but the average current must respect the continuous rating.

. Technical Comparison and Trends

.1 Differentiation from Other Technologies

Compared to older GaAsP or GaP red LEDs, AlInGaP offers significantly higher luminous efficiency and better temperature stability. Compared to white LEDs filtered to produce red, AlInGaP provides superior color purity and efficiency for monochromatic red applications. The 0.3-inch size fills a niche between smaller (0.2\") displays for portable devices and larger (0.5\"+) displays for longer viewing distances.

.2 Principle of Operation and Trends

The device operates on the principle of electroluminescence in a semiconductor p-n junction. When forward biased, electrons and holes recombine in the active AlInGaP layer, releasing energy as photons with a wavelength corresponding to the material's bandgap. The trend in such displays is towards higher efficiency (more light per watt), lower operating voltages, and integration of driver electronics directly into the package. However, discrete 7-segment displays remain vital for their simplicity, reliability, and cost-effectiveness in dedicated numeric readout applications.

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.