AN1149-6 Lumileds Lighting, LLC, AN1149-6 Datasheet
AN1149-6
Related parts for AN1149-6
AN1149-6 Summary of contents
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Reliability Considerations for SuperFlux LEDs LEDs provide solid state lighting and are therefore extremely durable. If the recommended soldering and operating conditions are followed, SuperFlux LEDs SuperFlux LEDs have performed well in a number of durability, reliability, and accelerated life ...
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Table 6.1 RELIABILITY, DURABILITY AND ACCELERATED LIFE TESTS Mechanical Shock MIL STD 883 Method 2002 Condition B: 3 shocks each axis, 3000g, 0.3 ms Vibration Variable Frequency MIL STD 883 Method 2007 Condition A: 4 cycles, 4 ...
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LED failures it has been identified as the root cause of some catastrophic failures of resistors and other leaded components. In addition, ultrasonic welding of mounting posts has been ...
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SuperFlux LED durability. One of the two typical wear out mechanisms in thermal cycle testing is separation between the plastic encapsulant and the sides of the reflector cup in the leadframe as shown in Figure 6.1. This type of separation ...
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Solder Heat Resistance Strife Test SuperFlux LEDs have been designed so that heat generated within the diode is quickly dissipated out through the copper leads. This thermally efficient design allows these LEDs to be driven at higher power levels relative ...
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Recommended LED Assembly Validation Tests Lumileds recommends that customers use the tests listed in the Table 6.2 to validate the durability of assemblies containing SuperFlux LEDs. Other tests (such as vibration, or corrosion resistance) may be included to check the ...
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LED chip (see Figure 6.2). To verify this root cause, the junction temperature during a typical Power & Temperature Cycle should be measured. The maximum junction temperature can be determined by adding the temperature difference between the LED lead ...
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Changes in Light Output During the Operating Life of AlInGap SuperFlux LEDs The light output of SuperFlux LEDs will gradually change during their lifetime. This change is usually a gradual reduction in light output; however it is also possible to ...
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Light output degradation for SuperFlux LEDs is a function of the current density in the LED semiconductor chip. The rate of change will be lower when SuperFlux LEDs are driven at lower currents. Figure 6.5 shows how the light output ...
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Table 6.5 Weatherability Tests Condition A, WHTOL, 85°C, 85% relative humidity Figure 6.6 Change in light-output for HPWT-xHOO LEDs when operated in Arizona weathering tests, at 70mA and outdoor temperatures. Figure 6.7 Photograph of apparatus used for Arizona ...
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... Lighting world. 2002 Lumileds Lighting. All rights reserved. Lumileds Lighting is a joint venture between Agilent Technologies and Philips Lighting. Luxeon is a trademark of Lumileds Lighting, LLC. Product specifications are subject to change without notice. San Jose, California and Malaysia. ...