AN1149-4 Lumileds Lighting, LLC, AN1149-4 Datasheet

AN1149-4

Manufacturer Part Number

AN1149-4

Description

Thermal Management Considerations for SuperFlux LEDs

Manufacturer

Lumileds Lighting, LLC

Datasheet

1.AN1149-4.pdf (14 pages)

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Thermal management is critical in the design of LED signal lamps because temperature affects

Considerations for SuperFlux LEDs

LEDs. In addition, thermal measurement techniques of LED signal lamps and recommended

LED performance and reliability. The following section details the effects of temperature on

Table of Contents

Importance of Thermal Management

for High-Power LED Assemblies

Thermal Modeling of LED Assemblies

Recommended Design Practices for Proper Thermal Management

Appendix 4A

Temperature Induced Effects on LED Light Output

Change in Dominant Wavelength (Color) as a Function

Temperature Induced Failures of LEDs

Thermal Resistance of LED Automotive Signal Lamps

Junction to Ambient Thermal Resistance Measurement Procedure

Junction to Ambient Thermal Resistance Measurement

Estimating Junction to Ambient Thermal Resistance

Evaluating Junction Temperature and Forward Current

Light Output and Forward Current

Derating Example Cases

PCB Design

LED Spacing

Lamp Housing Design and Mounting of the LED Array

Circuit Design

Alternate Junction to Ambient Thermal Resistance

Of Junction Temperature

Maximum Metallization

Current Control

Power Dissipation

“Switching” Power Supplies

Ambient Temperature Compensation

Measurement Procedure

design practices for proper thermal management are covered.

Thermal Management

application brief AB20 4

replaces AN

1149

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