White LED SMD 1608 Specification - 1.6x0.8x0.55mm - 2.6-3.4V - 68mW - English Technical Document

1. Product Overview

Wannan takarda ta cika cikakkun bayanai game da ƙayyadaddun ƙayyadaddun ƙayyadaddun LED mai farin fari, mai ƙaramin girma, wanda aka ƙera don aikace-aikacen lantarki na zamani. Na'urar tana amfani da guntu LED shuɗi da aka haɗa tare da rufin phosphor don samar da haske mai fari, yana ba da ma'auni na aiki da ƙananan girma wanda ya dace da ƙirar da ke da ƙarancin sarari.

1.1 Fa'idodi na Tsakiya da Kasuwa da Ake Nufi

Babbar fa'idar wannan LED ita ce kusurwar kallonta mai faɗin gaske wacce ta kai digiri 120, wanda ke tabbatar da rarraba haske iri ɗaya. Ya cika dacewa da daidaitattun hanyoyin haɗawa da na'urorin SMT, an rarraba shi a ƙarƙashin Matakin Hanzarin Danshi (MSL) 3, kuma ya bi ka'idojin muhalli na RoHS. Ayyukansa da ake hari sun haɗa da alamomin gani, hasken baya na maɓalli da alamomi, nunin faifai, na'urorin gida, da hasken gabaɗaya inda ake buƙatar ƙaramin tushen haske mai farin fari mai aminci.

2. Bincike Mai zurfi na Sigogi na Fasaha

Cikakkiyar fahimtar sigogin na'urar yana da mahimmanci don samun nasarar haɗawa cikin ƙirar da'ira.

2.1 Halaye na Lantarki da na Gani

The key performance metrics are defined at a standard test condition of an ambient temperature (Ts) of 25°C and a forward current (IF) of 5mA.

• Forward Voltage (VF): The device is offered in multiple voltage bins, ranging from a minimum of 2.6V (F1 bin) to a maximum of 3.4V (I2 bin). Designers must account for this variation when designing the driving circuitry to ensure consistent current and brightness.
• Luminous Intensity (Iv): The light output is also binned, with categories ranging from I00 (230-350 mcd) to L10 (800-1000 mcd). This allows for selection based on the required brightness level for the application.
• Reverse Current (IR): The maximum leakage current when a reverse voltage of 5V is applied is 10 µA, indicating good diode characteristics.
• Viewing Angle (2θ1/2): The typical full viewing angle at half intensity is 120 degrees, which is notably wide for an SMD LED.

2.2 Matsakaicin Matsakaici na Cikakke da Gudanar da Zafi

Exceeding these limits may cause permanent damage to the device.

• Power Dissipation (Pd): The maximum allowable power dissipation is 68 mW.
• Forward Current (IF): The maximum continuous forward current is 20 mA.
• Peak Pulse Current (IFP): A higher pulse current of 60 mA is permissible under specific conditions (0.1ms pulse width, 1/10 duty cycle).
• Thermal Resistance (RθJ-S): The junction-to-solder point thermal resistance is 450 °C/W. This is a critical parameter for thermal management. The power dissipated (Pd = VF * IF) and this thermal resistance determine the temperature rise of the LED junction above the solder point. The maximum junction temperature (Tj) must not exceed 95°C.
• Operating & Storage Temperature: The device can function and be stored within a range of -40°C to +85°C.
• Electrostatic Discharge (ESD): The Human Body Model (HBM) ESD rating is 1000V, which is standard for many LEDs but necessitates standard ESD handling precautions during assembly.

3. Binning System Explanation

To ensure color and brightness consistency in production, LEDs are sorted into bins.

3.1 Forward Voltage Binning

The forward voltage is categorized into eight distinct bins (F1, F2, G1, G2, H1, H2, I1, I2), each covering a 0.1V range from 2.6V to 3.4V. This allows designers to select LEDs with tighter voltage tolerances for applications requiring uniform power consumption.

3.2 Luminous Intensity Binning

The light output is grouped into four intensity bins (I00, J00, K00, L10). This enables the selection of LEDs for applications where a specific minimum brightness is required or where brightness matching across multiple LEDs is important.

3.3 Chromaticity Binning

Takardar tana nuni ga ma'auni na CIE chromaticity don takamaiman kwandon farin launi (TW22, TW23, TW24). Waɗannan ma'auni suna ayyana yanki mai siffar huɗu a kan zanen sararin launi na CIE 1931. LEDs waɗanda fitowar launinsu ya faɗo cikin waɗannan yankunan da aka ayyana ana haɗa su tare, suna tabbatar da daidaitaccen sautin farin launi (misali, sanyi fari, tsaka-tsaki fari) a cikin rukuni ɗaya.

4. Performance Curve Analysis

Bayanan zane-zane suna ba da haske game da halayyar na'urar a ƙarƙashin yanayi daban-daban.

4.1 Forward Voltage vs. Forward Current (IV Curve)

Lanƙwasa IV na yau da kullun yana nuna alaƙar da ba ta layi tsakanin wutar lantarki a kan LED da halin yanzu da ke gudana ta cikinta. Lanƙwasa zai nuna wutar lantarki ta kunna (kusa da ƙananan kewayon VF bin) bayan haka halin yanzu yana ƙaruwa da sauri tare da ƙaramin ƙaruwar wutar lantarki. Wannan siffa ita ce tushe don ƙira masu tuka halin yanzu na yau da kullun, waɗanda aka fi so fiye da masu tuka wutar lantarki na yau da kullun don LEDs.

5. Mechanical and Package Information

5.1 Package Dimensions and Tolerances

The device is housed in a compact 1608 package, measuring 1.6mm in length, 0.8mm in width, and 0.55mm in height. All dimension tolerances are ±0.2mm unless otherwise specified. Detailed top, side, and bottom views are provided in the specification, along with critical dimensions like the pad spacing (1.2mm ± 0.05mm).

5.2 Polarity Identification and Recommended Footprint

The bottom view clearly indicates the anode and cathode pads. The cathode is typically marked. A recommended solder pad land pattern is provided to ensure proper soldering and mechanical stability. The pad design is crucial for achieving a reliable solder joint and for effective heat transfer away from the LED die.

6. Soldering and Assembly Guidelines

6.1 SMT Reflow Soldering Instructions

LED ya dace da duk matakan solder reflow na SMT na yau da kullun. Saboda darajar MSL 3, dole ne a gasa kayan kafin a yi solder idan an buɗe jakar hana danshi fiye da sa'o'i 168 (kwanaki 7) a ƙarƙashin yanayin bene na masana'anta (30°C/60% RH). Takamaiman bayanin reflow (dumi-dumi, jiƙa, zafin kololuwar reflow, ƙimar sanyaya) ya kamata ya bi shawarwarin don irin waɗannan ƙananan sassan SMD, yawanci tare da zafin kololuwar da bai wuce 260°C ba.

6.2 Handling and Storage Precautions

• Koyaushe a yi amfani da kariyar ESD.
• Store in the original moisture barrier bag with desiccant when not in use.Bi matakan gasa na MSL 3 idan an wuce iyakokin fallasa.
• A guji matsin lamba na injiniya akan ruwan tabarau na LED.
• Do not exceed the absolute maximum ratings during testing or operation.

7. Packaging and Ordering Information

7.1 Packaging Specification

The LEDs are supplied in industry-standard embossed carrier tape on reels, suitable for automated pick-and-place machines. Detailed dimensions for the carrier tape pockets and the reel are provided to ensure compatibility with assembly equipment. A label specification for the reel is also included.

7.2 Moisture-Resistant Packing and Carton

The reels are packaged in moisture barrier bags with desiccant to maintain the MSL 3 rating during storage and transport. These bags are then packed in cardboard boxes for shipment.

8. Application Suggestions and Design Considerations

8.1 Yanayin Aikace-aikace na Al'ada

• Status Indicators: Ideal for power, connectivity, or function status lights in consumer electronics, appliances, and industrial equipment due to their small size and wide viewing angle.
• Backlighting: Can be used to backlight buttons, keypads, or small symbols on control panels.
• Decorative Lighting: Suitable for accent lighting in compact devices.
• General Illumination: Can be used in arrays for low-level task lighting or as a component in larger lighting modules.

8.2 Muhimman Abubuwan Zane

• Current Limiting: Always use a series resistor or a constant-current driver to limit the forward current. Do not connect directly to a voltage source.
• Thermal Design: Given the relatively high thermal resistance, ensure adequate PCB copper area (thermal pads) and possibly ventilation if operating near maximum current, to keep the junction temperature below 95°C. High junction temperatures accelerate lumen depreciation and reduce lifespan.
• Optical Design: The 120-degree viewing angle may require light guides or diffusers if a more focused beam is needed. Conversely, it is advantageous for area illumination.
• Binning Selection: For applications requiring color or brightness uniformity, specify the required VF, intensity, and chromaticity bins.

9. Amincewa da Tabbatar da Inganci

9.1 Abubuwan Gwajin Amincewa da Yanayi

The specification references a set of reliability tests performed to ensure product longevity. While the specific conditions are detailed in a separate document, typical tests for LEDs include: High Temperature Operating Life (HTOL), Low Temperature Storage, Temperature Cycling, Humidity testing, and Solder Heat Resistance. These tests simulate the stresses the component will encounter during its lifetime.

9.2 Ma'auni na Hukunci na Rashin Nasara

Criteria for judging a device as failed during these reliability tests are established. Common failure criteria include a significant drop in luminous intensity (e.g., >30%), a large shift in forward voltage, a change in chromaticity coordinates beyond specified limits, or catastrophic failure (no light output).

10. Tambayoyin da ake yawan yi (Dangane da Sigogin Fasaha)

10.1 Menene manufar kwandon wutar lantarki daban-daban?

Kwandon wutar lantarki yana ba masu zane damar zaɓar LEDs tare da halaye na lantarki iri ɗaya. A cikin aikace-aikacen da ke amfani da LEDs da yawa a jere ko a layi daya, daidaita kwandon VF yana taimakawa tabbatar da rarraba wutar lantarki daidai da haske iri ɗaya a duk LEDs, yana hana wasu daga cikin su kasance cikin yin amfani da su fiye da kima ko ƙasa da kima.

10.2 Ta yaya zan lissafa madaidaicin resistor na jerin da ake bukata?

Yi amfani da Dokar Ohm: R = (Vsupply - VF) / IF. Yi amfani da mafi girman VF daga rukunin da aka zaɓa don ƙirar mai ra'ayin mazan jiya don tabbatar da cewa halin yanzu bai wuce IF da ake so ba. Misali, tare da wadata na 5V, IF na 5mA, da LED daga rukunin I2 (VF max = 3.4V): R = (5 - 3.4) / 0.005 = 320 Ohms. Yi amfani da madaidaicin ƙimar daidaitaccen ƙima (misali, 330 Ohms).

10.3 Me ya sa sarrafa zafi ya zama muhimmanci ga irin wannan ƙaramin LED?

Duk da ƙaramin girmansa, guntun LED yana haifar da zafi. Juriyar zafi na 450°C/W tana nufin cewa ga kowace watt da aka ɓata, zafin haɗin yana tashi 450°C sama da zafin wurin solder. Ko da a 20mA da 3.4V (68mW), hawan zafi yana da mahimmanci (kimanin 30.6°C). Mummunan nutsewar zafi na iya tura zafin haɗin cikin sauri sama da iyakar 95°C, wanda ke haifar da raguwar haske cikin sauri da gajartawar rayuwa.

11. Ka'idar Aiki da Trends na Fasaha

11.1 Ka'idar Aiki ta Asali

Wannan farar LED ce da aka canza ta phosphor. Guntun semiconductor da ke fitar da hasken shuɗi (yawanci bisa InGaN) an lulluɓe shi da phosphor mai rawaya (ko gaurayawan ja da kore). Wani ɓangare na hasken shuɗi yana sha ta hanyar phosphor kuma ana sake fitar da shi azaman hasken rawaya mai tsayin zango. Haɗuwar sauran hasken shuɗi da canza hasken rawaya yana bayyana fari ga idon ɗan adam. Wannan hanyar tana da inganci kuma tana ba da damar daidaita zafin launin fari ta hanyar daidaita abun da ke cikin phosphor.

11.2 Trends na Masana'antu

Trends a cikin SMD LEDs don nuna alama da hasken gabaɗaya yana ci gaba zuwa mafi inganci (ƙarin lumens a kowace watt), ƙananan girman fakitin don ƙirar mafi yawan taro, ingantaccen ma'auni na nuna launi (CRI) don mafi kyawun ingancin haske, da ƙaramin binning don mafi girman daidaito. Hakanan ana mayar da hankali kan haɓaka aminci da aikin zafi don tallafawa mafi girman igiyoyin tuƙi a cikin ƙananan siffofi. Fakitin 1608 yana wakiltar cikakkiyar siffa, siffar da aka karɓa sosai da ke daidaita girman, aiki, da ƙirar kera.