Bridgelux SMD 3838 Thrive97 3V

Introduction

The Bridgelux SMD 3838 low power LED is cold-color targeted, ensuring LEDs fall within their specified color bin at typical application conditions of 25°C. The SMD 3838 is ideal as a drop-in replacement for emitters with an industry-standard 3.8mm x 3.8mm footprint.

Product Feature Map

Bridgelux SMD LED products come in industry-standard package sizes. These LEDs are optimized for cost and performance, helping to ensure highly competitive system lumen per dollar performance while addressing the stringent efficacy and reliability standards required for modern lighting applications.

Cathode Mark:

The image shows a square LED package with four individual LED dies. The dies are labeled C1, C2, C3, and C4. The cathode mark is indicated on the package.

Product Nomenclature

The part number designation for Bridgelux SMD 3838 is explained as follows:

BXET - T2765 SH-03 KA

• BXET: Product Family
• T2765: Triple CCT, Mix CCT 2700K-6500K
• SH: High Power
• 03: Typical Forward Voltage
• KA: Product Version
• Thrive: Indicates Thrive technology

Product Selection Guide

The following product configurations are available:

Table 1: Selection Guide, 3838 pulsed Measurement Data at 60mA (T_sp=25°C)

Table 2: Selection Guide, 3838 pulsed Measurement Data at 60mA (T_sp=55°C)

Notes for Tables 1 & 2:

1. Products tested under pulsed condition (10ms pulse width) at nominal drive current where T_j=T_sp=25°C.
2. Bridgelux maintains a ±7.5% tolerance on luminous flux measurements, ±0.1V tolerance on forward voltage measurements for the SMD 3838.
3. Typical pulsed test performance values are provided as reference only and are not a guarantee of performance.
4. The luminous flux (lm) and VF are based on both C3 lighting up simultaneously in parallel.
5. The luminous flux (lm) and VF are based on C3 lighting up illuminate separately.

Performance at Each CCT

Table 3: Tunable White

Notes for Table 3:

1. Products tested at 1W for T_sp = 55°C.
2. The performance tested when T_j=T_sp=25°C.

Spectrum Characteristics

Table 4: Typical Color Rendering Index and TM-30 Values, T_sp=55°C

Note for Table 4:

1. Bridgelux maintains a tolerance of ± 3 on Color Rendering Index R1-R15 measurements and TM-30 measurements.
2. R_n reference by Nominal Drive Current will have deviations when changed drive current.

Figure 1: Chromaticity Coordinate Group (Color Targeted at T_sp=55°C)

The image displays a chromaticity diagram showing color bins for different CCTs (2700K to 6500K) at 0.5W and 1W power levels. Each CCT is represented by an elliptical region indicating the color tolerance.

Figure 2: Typical Color Spectrum

The figures show normalized spectral intensity versus wavelength for various CCTs at 0.5W and 1W power levels. The spectra demonstrate the tunable nature of the LEDs, closely matching natural light.

Spectral Matching to Natural Light

Humans have evolved and thrived for millions of years under the sun's natural daylight. While discussions continue regarding the development of LED products with artificial spectra aimed at increasing productivity and focus or helping with relaxation, the long-term physiological effects of such altered environments on humans remains unknown.

Bridgelux Thrive is engineered to provide the closest match to natural light using proprietary chip, phosphor and packaging technology. Bridgelux is working with our customers and industry partners to define new metrics to describe and quantify this spectral matching: going beyond today's quality of light metrics such as CRI and TM-30.

Spectrum Characteristics (Continued)

Figure 3: 0.5W 2700K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 0.5W 2700K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 4: 0.5W 3000K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 0.5W 3000K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 5: 0.5W 3500K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 0.5W 3500K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 6: 0.5W 4000K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 0.5W 4000K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 7: 0.5W 5000K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 0.5W 5000K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 8: 0.5W 5700K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 0.5W 5700K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 9: 0.5W 6500K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 0.5W 6500K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 10: 1W 2700K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 1W 2700K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 11: 1W 3000K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 1W 3000K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 12: 1W 3500K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 1W 3500K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 13: 1W 4000K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 1W 4000K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 14: 1W 5000K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 1W 5000K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 15: 1W 5700K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 1W 5700K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Figure 16: 1W 6500K Thrive TM-30 Graphs

This figure displays the TM-30 data for the 1W 6500K Thrive LED, showing Local Color Fidelity (R_fhj) across different Hue-Angle Bins (j). A corresponding CIE diagram illustrates the color coordinates and Duv value.

Absolute Maximum Ratings

Table 5: Maximum Ratings

Notes for Table 5:

1. Bridgelux recommends a maximum duty cycle of 10% and pulse width of 10 ms when operating LED SMD at maximum peak pulsed current specified. Maximum peak pulsed current indicate values where LED SMD can be driven without catastrophic failures.
2. Light emitting diodes are not designed to be driven in reverse voltage and will not produce light under this condition. Maximum rating provided for reference only.

Product Bin Definitions

Table 6: MacAdam Ellipse Color Bin Definitions

Notes for Table 6:

1. Color binning at T_sp=25°C unless otherwise specified.
2. Bridgelux maintains a tolerance of ± 0.007 on x and y color coordinates.
3. The performance is based on both C3 lighting up simultaneously in parallel.

Figure 17: Chromaticity Coordinate Group (Color Bin Structure, Color Targeted at T_sp=25°C)

This figure shows the chromaticity coordinate groups for C1, C2, and C3, illustrating the color bin structure and target points.

Table 7: Luminous Flux Range Definitions at 60mA, T_sp=25°C

Notes for Table 7:

1. Bridgelux maintains a tolerance of ± 7.5% on luminous flux measurements.
2. The luminous flux (lm) is based on both C3 lighting up simultaneously in parallel.
3. No flux bin.

Table 8: Forward Voltage Range Definitions at 60mA, T_sp=25°C

Notes for Table 8:

1. Bridgelux maintains a tolerance of ± 0.1V on forward voltage measurements.
2. The VF bin refers to the Vf of C1.

Table 9: Color Bin in combination at 60mA

Notes for Table 9:

The bin combination is as follows:

1. Bin SA1 can be used independently.
2. The bin code used 2:1 combination of SA5+SA9 (2*SA5+SA9).
3. Other bin codes used in 1:1 combinations of SA1+SA2, SA2+SA6, SA3+SA5, SA4+SA8, SA5+SA7.
4. Different VF Bins cannot be mixed for use.

Performance Curves

Figure 18: Drive Current vs. Voltage (T_sp=25°C)

This graph shows the relationship between forward current and forward voltage for the Bridgelux SMD 3838 Thrive97 3V LED at a solder point temperature of 25°C.

Figure 19: Typical Relative Luminous Flux vs. Drive Current (T_sp=25°C)

This graph illustrates the typical relative luminous flux as a function of drive current for C1, C2, and C3 at a solder point temperature of 25°C.

Note for Figure 19: Pulse width modulation (PWM) is recommended for dimming effects.

Figure 20: Typical Relative Flux vs. Solder Point Temperature

This graph shows the typical relative luminous flux as a function of solder point temperature for C1, C2, and C3.

Typical Radiation Pattern

Figure 21: Typical Spatial Radiation Pattern at 60mA, T_sp=25°C

This graph displays the spatial radiation pattern of the LED, showing relative intensity versus angular displacement. The viewing angles for C1, C2, and C3 are approximately 116°, 115°, and 119° respectively. The viewing angle is defined as the off-axis angle from the centerline where the luminous intensity (Iv) is half of the peak value.

Figure 22: Typical Polar Radiation Pattern at 60mA, T_sp=25°C

This polar plot illustrates the radiation pattern of the LED, showing relative luminosity versus radiation angle.

Mechanical Dimensions

Figure 23: Drawing for SMD 3838

The drawing provides the mechanical dimensions of the SMD 3838 package, including length, width, height, and lead details. It also shows the recommended PCB soldering pad pattern.

Notes for Figure 23:

1. Drawings are not to scale.
2. Drawing dimensions are in millimeters.
3. Unless otherwise specified, tolerances are ± 0.10mm.
4. The optical center of the LED emitter is nominally defined by the mechanical center of the emitter. The light emitting surface (LES) is centered on the mechanical center of the LED emitter to a tolerance of ± 0.2 mm.

Recommended PCB Soldering Pad Pattern

The image shows recommended PCB soldering pad patterns for the SMD 3838 LED, including copper foil design and solder mask.

Reliability

Table 10: Reliability Test Items and Conditions

Passing Criteria

Notes for Table 10:

1. Measurements are performed after allowing the LEDs to return to room temperature.
2. T_sp: reflow soldering temperature; T_j: ambient temperature.

Reflowing Characteristics

Figure 24: Reflow Profile

This figure illustrates the recommended reflow profile for lead-free assembly, detailing temperature stages, ramp rates, and durations.

Packaging

Figure 25: Emitter Reel Drawings

This figure shows the dimensions of the emitter reel used for packaging the LEDs.

Figure 26: Emitter Tape Drawings

This figure illustrates the emitter tape dimensions, including pocket size, pitch, and leader/trailer tape specifications.

Figure 27: Emitter Reel Packaging Drawings

This figure depicts the packaging process for the emitter reels, showing how reels are placed in moisture-proof bags and then into boxes for shipping.

Design Resources

Please contact your Bridgelux sales representative for assistance.

Precautions

Disclaimers

About Bridgelux: Bridging Light and Life™

At Bridgelux, we help companies, industries and people experience the power and possibility of light. Since 2002, we've designed LED solutions that are high performing, energy efficient, cost effective and easy to integrate. Our focus is on light's impact on human behavior, delivering products that create better environments, experiences and returns-both experiential and financial. And our patented technology drives new platforms for commercial and industrial luminaires.

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Bridgelux

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