3030 White LED Specification - Size 3.00x3.00x0.55mm - Voltage 2.8-3.6V - Power ~1.5W - English Technical Document

1. Description

This document provides the technical specifications for a high-brightness white LED component. The device is designed for Surface-Mount Technology (SMT) assembly, featuring an industry-standard 3030 package footprint.

1.1 Overview

The white LED is fabricated using a blue chip and phosphor technology to produce white light. The component is housed in an EMC (Epoxy Molding Compound) package, which offers good thermal and mechanical stability for reliable performance.

1.1.1 Features

• EMC Package for enhanced reliability.
• Extremely wide viewing angle, suitable for broad illumination.
• Fully compatible with standard SMT assembly and solder reflow processes.
• Supplied on tape and reel for automated pick-and-place assembly.
• Moisture Sensitivity Level (MSL): Level 3.
• Compliant with RoHS environmental directives.

1.1.2 Applications

• Backlighting for LCD panels, televisions, and monitors.
• Illumination for switches and symbols.
• General-purpose optical indicators.
• Indoor display applications.
• Tubular lighting fixtures.
• General illumination uses.

1.2 Package Dimensions and Mechanical Outline

The LED features a compact 3030 footprint. Key mechanical dimensions are as follows:

• Package Length: 3.00 mm (tolerance \u00b10.2mm).
• Package Width: 3.00 mm (tolerance \u00b10.2mm).
• Package Height: 0.55 mm (nominal).
• The lens features a domed shape with a diameter of approximately 2.6 mm.
• Anode and cathode pads are located on the bottom of the package, with recommended solder pad dimensions provided for PCB design (2.26mm x 1.45mm for each pad with a 0.69mm gap between them).

All dimension units are in millimeters, and standard tolerances are \u00b10.2mm unless otherwise specified. Proper polarity identification is crucial; the package includes visual markings to distinguish the anode and cathode terminals.

1.3 Product Parameters: Electrical and Optical Characteristics

All parameters are specified at a junction temperature (T_J) of 25\u00b0C. Understanding these ratings is essential for reliable circuit design and thermal management.

Electrical and Optical Characteristics (T_S=25\u00b0C)

Key performance metrics under typical operating conditions:

• Forward Voltage (V_F): 2.8V (Min) to 3.6V (Max) at a test current of 500mA. The typical value falls within this range.
• Reverse Current (I_R): Maximum 10 \u00b5A at a reverse voltage of 5V.
• Luminous Flux (\u03a6): 115 lm (Min) to 180 lm (Max) at 500mA.
• Viewing Angle (2\u03b8_1/2): Typical 120 degrees, providing a very wide beam pattern.
• Thermal Resistance (R_THJ-S): Typical 12 \u00b0C/W, measured from the junction to the solder point.

Absolute Maximum Ratings (T_S=25\u00b0C)

These ratings define the limits beyond which permanent damage may occur. They should never be exceeded in operation.

• Power Dissipation (P_D): 2160 mW maximum.
• Continuous Forward Current (I_F): 600 mA maximum.
• Peak Forward Current (I_FP): 900 mA maximum, under pulsed conditions (1/10 duty cycle, 0.1ms pulse width).
• Reverse Voltage (V_R): 5 V maximum.
• Electrostatic Discharge (ESD) HBM: Withstands up to 2000V (HBM) with over 90% yield, though ESD protection during handling is still required.
• Operating Temperature (T_OPR): -10\u00b0C to +80\u00b0C.
• Storage Temperature & Humidity: 5\u00b0C to 30\u00b0C at a relative humidity \u226460%.
• Maximum Junction Temperature (T_J): 115 \u00b0C. This is a critical limit for LED longevity.

Critical Design Note: The maximum operating current must be determined after measuring the actual package temperature during operation. The junction temperature must not exceed the maximum rating of 115\u00b0C. Care must be taken that the total power dissipation (V_F x I_F) does not exceed the absolute maximum rating of 2160mW.

1.4 Product Binning System

To ensure color and brightness consistency in production applications, LEDs are sorted into bins based on key parameters measured at I_F = 500mA.

• Forward Voltage (V_F) Binning: LEDs are sorted into eight bins (G1, G2, H1, H2, I1, I2, J1, J2), each representing a 0.1V step from 2.8-2.9V up to 3.5-3.6V. This allows designers to select LEDs with tighter voltage tolerances for current matching in multi-LED arrays.
• Luminous Flux (\u03a6) Binning: LEDs are sorted into luminous flux bins labeled T115, T120, T125, etc., each representing a 5-lumen step starting from 115-120 lm. This enables precise control over the total light output in an application.

By specifying a combination of V_F and \u03a6 bins, engineers can achieve highly uniform performance in their final products. The specification provides tolerance notes for measurement of forward voltage (\u00b10.1V) and luminous flux (\u00b15%).

1.5 Optical Characteristics and Colorimetry

The document references the C.I.E. 1931 Chromaticity Diagram, which is the international standard for defining color. For white LEDs, the color is defined by its coordinates (x, y) on this diagram. The specification includes a table of bin codes with corresponding target CIE (x, y) coordinate ranges (e.g., CIE-X1, CIE-Y1, CIE-X2, CIE-Y2). The typical measurement tolerance for these color coordinates is \u00b10.005. Selecting LEDs from the same or adjacent color bins is essential to avoid visible color differences (color shift) between individual LEDs in an assembly.

2. Packaging and Ordering Information

The product is supplied in a format optimized for high-volume, automated manufacturing.

2.1 Packaging Specifications

The LED is delivered on embossed carrier tape wound onto reels. Detailed dimensions for the carrier tape pockets, reel diameter, and hub size are provided to ensure compatibility with standard SMT placement equipment. A label specification for the reel is also defined. The packaging process includes moisture-resistant measures appropriate for the MSL 3 rating, and units are further packed in cardboard boxes for shipping and storage.

2.1.6 Reliability Testing

The product undergoes a series of reliability tests to ensure performance under various environmental stresses. The specification lists the test items and conditions, which typically include tests like high-temperature storage, low-temperature storage, temperature cycling, humidity resistance, and solder heat resistance. Specific conditions (e.g., temperature, duration, number of cycles) are defined for each test.

2.1.7 Damage Criteria

Clear visual and functional criteria are established to judge whether a component has been damaged after reliability testing or handling. This may include criteria such as cracked package, discoloration, lead detachment, or significant deviation from initial electrical/optical parameters.

3. SMT Reflow Soldering Guidelines

Proper soldering is critical for mechanical integrity and thermal performance. The component is designed for lead-free reflow soldering processes.

The guidelines specify a reflow soldering temperature profile. This profile defines key parameters such as preheat temperature and time, the temperature ramp-up rate, the peak temperature, the time above liquidus, and the cooling rate. Adhering to this profile prevents thermal shock to the LED, which can cause internal stress, delamination, or premature failure. The maximum body temperature during soldering should not exceed the specified limit.

3.1.1 Soldering Iron Use (For Rework)

If manual rework is necessary, specific precautions must be taken. The soldering iron tip temperature should be controlled, and the contact time with the LED terminals must be minimized (typically less than 3 seconds) to prevent excessive heat from traveling into the LED chip and damaging it or the internal bonds.

3.1.2 Repairing Process

A recommended process for removing and replacing a faulty LED is provided. This usually involves carefully applying heat to the solder joints to remove the old component, cleaning the pad, applying new solder paste, and then placing and reflowing the new component, following the standard profile.

3.1.3 General Cautions

• Do not apply mechanical stress to the LED lens.
• Avoid touching the lens surface with fingers or tools to prevent contamination.
• Ensure the PCB pad design matches the recommended solder pattern to achieve a reliable solder fillet and proper alignment.

4. Handling and Storage Precautions

To maintain quality and reliability, several handling precautions are emphasized:

• ESD Protection: Although the LED has a 2000V HBM ESD rating, it is still a semiconductor device. Anti-static handling procedures (e.g., grounded workstations, wrist straps) must be used to prevent damage from electrostatic discharge.
• Moisture Sensitivity: As an MSL Level 3 component, the package can absorb moisture from the air. If the sealed moisture barrier bag is opened or damaged, the components must be used within a specified time (typically 168 hours at <30\u00b0C/60% RH) or be rebaked according to the prescribed procedure before reflow soldering to prevent \"popcorning\" (package cracking due to vaporized moisture during reflow).
• Storage Conditions: Store in a cool, dry environment as specified (5-30\u00b0C, RH \u2264 60%). Avoid exposure to direct sunlight, corrosive gases, or excessive dust.
• Cleaning: If post-solder cleaning is required, use approved solvents and methods that are compatible with the LED package material. Avoid ultrasonic cleaning unless verified to be safe for the specific component.

5. Application Guidelines and Design Considerations

5.1 Thermal Management in Design

The most critical factor for LED performance and lifetime is managing the junction temperature (T_J). The thermal resistance from junction to solder point is 12\u00b0C/W typical. To calculate T_J:

T_J = T_PCB + (R_THJ-S \u00d7 Power Dissipation)

Where T_PCB is the temperature at the solder pads on the PCB. Designers must ensure adequate PCB copper area (thermal pads or planes) and possibly additional heatsinking to keep T_J well below the 115\u00b0C maximum, preferably below 85-100\u00b0C for long life. Using a lower forward current than the maximum 600mA is an effective way to reduce power dissipation and heat generation.

5.2 Drive Circuit Design

LEDs are current-driven devices. A constant-current driver is strongly recommended over a constant-voltage driver to ensure stable light output and prevent thermal runaway. The driver should be designed to limit the current to the required level (e.g., 500mA for nominal brightness) while accounting for the forward voltage variation (2.8-3.6V). For multi-LED arrays, series connection helps ensure current matching, while parallel connections require careful bin selection or individual current limiting to account for V_F variations.

5.3 Optical Design Considerations

The 120-degree viewing angle makes this LED suitable for applications requiring wide, diffuse illumination rather than a focused spot. For backlighting applications, optical diffusers and light guides are typically used to evenly distribute the light. The initial luminous flux and its gradual decrease over time (lumen maintenance) must be factored into the system's overall light output requirements.

5.4 Typical Application Circuits

A basic application circuit involves a constant-current LED driver IC or a simple current-limiting resistor in series with the LED when powered from a voltage source. The series resistor value is calculated as R = (V_Supply - V_F) / I_F. The power rating of the resistor must be sufficient (P = (I_F)² \u00d7 R). This method is less efficient than a switching constant-current driver but may be acceptable for simple, low-power applications. For the 500mA operation, a dedicated LED driver IC is almost always recommended for efficiency, control, and protection.