RGBW LED 3.5x3.7x2.6mm 3.4V 68mW Full Color SMD LED - Technical Specification

1. Product Overview

1.1 General Description

This device is a special SMD LED package integrating four LED chips: Red (R), Green (G), Blue (B), and White (W). The compact size of 3.5mm x 3.7mm x 2.6mm makes it ideal for high-density full-color display applications. The package features a matte surface to reduce glare and is water-resistant with IPX6 rating, allowing use in outdoor and harsh environments. It is also RoHS compliant and lead-free.

1.2 Features

• Extremely wide viewing angle (110 degrees)
• High luminous intensity with low power dissipation
• Good reliability and long operating life
• Water-resistant (IPX6)
• Moisture sensitivity level: 5a
• RoHS compliant and Pb-free reflow soldering

1.3 Applications

• Outdoor full-color video screens
• Indoor and outdoor decorative lighting
• Amusement parks and entertainment venues
• General signage and architectural lighting

1.4 Package Dimension

The package dimensions are 3.5mm (length) x 3.7mm (width) x 2.6mm (height). The bottom view shows 8 solder pads with polarity markings. The top view includes a pin-mark indicator. All dimensions have a tolerance of ±0.1mm unless otherwise noted.

2. Technical Parameters

2.1 Electrical and Optical Characteristics (Ts=25°C)

Note: Tolerance of forward voltage ±0.1V, dominant wavelength ±1nm, luminous intensity ±10%.

2.2 Absolute Maximum Ratings

2.3 CIE Color Coordinates

The white LED is available in three CIE bins: 50A, 50B, and 50C. The exact coordinates should be referred to the product label. All measurements are under standardized conditions at 25°C.

2.4 Binning Information

Luminous intensity binning follows a 1:1.4 ratio. Wavelength binning is 5nm per bin for red and 4nm per bin for green and blue. Forward voltage binning is not explicitly defined but specified by min/max limits.

3. Performance Curves

3.1 Forward Voltage vs. Forward Current

Figure 1-7 shows the relationship between forward voltage and forward current for each color at 25°C. The curves illustrate a typical diode behavior with increasing voltage required for higher currents.

3.2 Forward Current vs. Relative Intensity

Figure 1-8 demonstrates that relative intensity increases with forward current. At 20mA, each color reaches its nominal intensity. The curves are approximately linear within the operating range.

3.3 Luminous Intensity vs. Ambient Temperature

Figure 1-9 shows that luminous intensity decreases as ambient temperature rises. At 70°C, the intensity can drop significantly, emphasizing the need for proper thermal management.

3.4 Solder Temperature vs. Forward Current Derating

Figure 1-10 provides a derating curve: as solder temperature increases, the maximum allowed forward current decreases. At 100°C, the current should be reduced to near zero to avoid damage.

3.5 Spectrum Distribution

Figure 1-11 shows the relative emission intensity vs. wavelength for all colors. The red peak is around 620nm, green around 530nm, blue around 470nm, and white has a broad spectrum covering 4000K and 5000K options.

3.6 Radiation Diagram

Figure 1-12 displays the radiation pattern, confirming a wide viewing angle of 110 degrees with approximately 50% relative intensity at ±55 degrees.

4. Mechanical and Packaging Information

4.1 Package Drawing

The LED package is shown with a top view, side view, bottom view, and polarity diagram. Pin 1 is marked. The soldering pattern (recommended PCB land pattern) is also provided. Glue filling is applied to protect the wire bonds.

4.2 Carrier Tape and Reel Dimensions

Each reel contains 4000 pieces. Carrier tape dimensions: the drawing shows detailed measurements. The reel has an A dimension of 100.0±0.4mm, B dimension of 14.3±0.3mm, etc. Detailed dimensions are available in the specification.

4.3 Label Information

The label includes Part Number, Lot Number (including packing machine, serial number, bin, quantity), IV, VF, Wd, IF, QTY, and Date. This ensures traceability.

4.4 Moisture Resistant Packing

The product is shipped in anti-static and moisture-proof aluminum foil bags with desiccant and a humidity indicator card (CF-HIC). The bag is then sealed.

4.5 Cardboard Box

The reels are packed in a sturdy cardboard box for transportation. The box size is not specified but designed to protect the reels.

5. Reliability Testing

5.1 Test Items and Conditions

The product has been qualified through various reliability tests: Resistance to Soldering Heat (260°C, 3 cycles), Thermal Shock (-40°C to 100°C, 15 min each, 500 cycles), Moisture Resistance (85°C/85% RH, 12h then 260°C reflow), High Temperature Storage (100°C, 1000h), Low Temperature Storage (-40°C, 1000h), Room Temperature Operating Life (25°C, 20mA, 1000h), High Temperature High Humidity Life (85°C/85% RH, 10mA, 500h), Temperature Humidity Storage (85°C/85% RH, 1000h), Low Temperature Life (-40°C, 20mA, 1000h). All tests performed with 22 samples, acceptance criteria 0/1 failure.

5.2 Failure Criteria

After testing, the following changes are acceptable: forward voltage change within ±10% of initial, reverse current ≤10µA at 5V, average luminous intensity degradation ≤30%, and no physical damage such as cracks, delamination, or non-illumination.

6. Soldering and Assembly

6.1 Reflow Soldering Profile

Recommended profile: Average ramp-up rate ≤4°C/s; preheat from 150°C to 200°C for 60-120 seconds; time above 217°C (T_L) ≤60 seconds; peak temperature 245°C with time within 5°C of peak ≤30 seconds and time at peak (T_P) ≤10 seconds; cooling rate ≤6°C/s; total time from 25°C to peak ≤8 minutes. Only one reflow soldering is allowed. Mid-temperature solder paste is recommended.

6.2 Hand Soldering and Repair

If hand soldering is necessary, keep iron temperature below 300°C for less than 3 seconds. Only one hand solder attempt. For repair, use a double-head soldering iron to remove the LED gently. Cleaning is allowed only with alcohol; avoid water, benzene, thinner, and ionic liquids containing Cl or S.

7. Handling and Storage

7.1 Storage Conditions

Before opening: store at ≤30°C and ≤60% RH for up to 6 months. After opening: use within 12 hours under ≤30°C/≤60% RH. Unused parts should be stored at ≤30°C/≤10% RH and baked at 65±5°C for 24 hours before next use. Baking conditions depend on production date and moisture exposure.

7.2 Static Electricity Precautions

This LED is sensitive to ESD. Proper grounding of equipment and use of anti-static wrist straps, pads, uniforms, and containers are required.

7.3 Reverse Voltage Protection

The internal LED chip can be damaged by continuous reverse voltage above 5V. Design circuits to ensure reverse voltage is below the absolute maximum rating, especially in matrix driving scenarios.

7.4 Safe Operating Temperature

To ensure long life, it is recommended that the LED surface temperature be kept below 55°C and the leg temperature below 75°C during operation. Proper heat sinking and PCB design are critical.

7.5 Directions for Use

Always drive each chip with constant current. Do not exceed the absolute maximum forward current per chip. When multiple chips are on, the total power dissipation of the package must be under the limit (sum of individual PDs). Avoid applying voltage when the LED is off. For matrix displays, ensure reverse voltage is controlled. Aging at 20% power for initial period is recommended if humidity is a concern.

8. Application Guidance

Typical applications include outdoor full-color video walls, decorative lighting, and amusement park attractions. When designing, pay attention to thermal management: use adequate PCB copper area, ensure proper spacing between LEDs, and consider ambient temperature derating. Use constant current drivers for uniform brightness. For rental applications, select LEDs from the same bin for color consistency.

9. Technology Comparison

Compared to traditional RGB LEDs, this device integrates an additional white chip for improved color rendering and white balance. The IPX6 water resistance provides enhanced durability for outdoor use. The wide 110-degree viewing angle ensures uniform appearance from all directions. The MSL 5a rating requires careful handling but allows flexible manufacturing.

10. Common Questions (FAQs)

Q: What is the storage life before opening? A: 6 months under ≤30°C and ≤60% RH.

Q: Can the LED be cleaned with water? A: No, only alcohol is recommended. Avoid water, benzene, thinner, and ionic liquids.

Q: What is the maximum reverse voltage allowed? A: 5V. Continuous reverse voltage may damage the chip.

Q: How many reflow cycles are permitted? A: Only one reflow soldering is allowed.

Q: What is the maximum junction temperature? A: 115°C.

11. Practical Use Cases

An example of deployment: a large outdoor video screen using an array of these RGBW SMD LEDs can achieve high brightness and vivid colors even under direct sunlight. The IPX6 rating allows installation in locations exposed to rain and splashing water. For decorative lighting, the small package size enables compact fixture designs.

12. Principle of RGBW LED

An RGBW LED combines three primary color chips (Red, Green, Blue) and a separate white chip. The white chip can be a phosphor-converted blue LED or a direct white LED (typically a blue chip with yellow phosphor). By mixing the four channels, a wider color gamut and better white balance can be achieved compared to RGB-only solutions. The white chip provides a baseline brightness, while the RGB chips add color saturation.

13. Development Trends

The LED display industry is moving toward higher resolution (smaller pixel pitch), higher brightness, and better environmental protection. Products like this RGBW SMD LED with IPX6 rating address the demand for reliable outdoor displays. Future trends include even lower power consumption, higher luminous efficacy, and integration with smart control systems.