LED Fundamentals

Welcome to LED Fundamentals, a primer on LEDs for lighting applications and LED system design considerations. The system and technology are introduced with a special focus placed on engineering discipline categories thermal, optical and electrical.

Basis

LEDs Basics

An introduction to LED lighting, semiconductor materials, LED chip technologies and more.

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LEDs System Introduction

Learn about the individual components that make up super bright LED systems and determine which LED

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How to Read a Datasheet

Part 1 of 2 – Typical/Maximum Characteristics and Binning

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How to Read a Datasheet

Part 2 of 2 – Characteristic Curves, Dimensions and Packaging.

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Thermal

Thermal Characteristics of LEDs

Learn about thermal management for high intensity LEDs

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Basics of Heat Transfer

Learn about high power LEDs, heat transfer and thermal conductivity.

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Internal Thermal Resistance of LEDs

Get detailed information about the internal thermal resistance of LED packages.

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Ext. Thermal Resistance (Substrates)

Examine the thermal resistance of PCB substrates and compare substrate technologies.

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External Thermal Resistance (Interface Materials and Heat Sinks)

Learn how to identify the proper heat sink for an LED system design.

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Optical

Mesopic Vision

Learn about thermal management for high Review the different vision ranges and the advantages of LED

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Optical Principles

Learn the basics of reflection, transmission and other optical properties and how they are applied

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Radiometry and Photometry

Learn the basics of radiometry and photometry and other important photometric concepts.

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Colorimetry

Learn how the eye perceives color and the metrics used to describe color.

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Primary/Secondary Optics and Measurements

Review the primary optic designs and resources for choosing secondary optics for LEDs.

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Optical and Lighting Software

Learn about the differences between optical software and lighting software.

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Electrical

Electrical Characteristics of LEDs

Learn the technical parameters needed to properly design an LED lighting system.

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Driving LEDs – Resistors and Linear Drivers

Learn about resistor based current regulation in LED systems.

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Driving LEDs – Switch Mode Drivers

Learn how switch mode drivers work and their benefits in LED lighting systems.

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Driving LEDs – AC-DC Power Supplies

Examine the importance of TRIAC dimmable LEDs and driver standards.

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