Tag Archives: led lighting

App note: Evaluating the lifetime behavior of LED systems

Understanding the known factors of LEDs to help evaluate LED system lifetime discussed in this white paper from Lumileds. Link here (PDF) One of the strongest propositions of power Light Emitting Diodes (LEDs) is their long lumen maintenance their ability to continue producing light output for many years of use, in contrast to most conventional […]

App note: Coordinated circuit protection options for LED lighting

App note from Littelfuse on protecting LED lights from overloaded circuits, overvoltage and electrical shorts assuring safety on customers from these hazards. Link here (PDF) LED technology has advanced rapidly, with improved chip designs and materials facilitating development of brighter and longer-lasting light sources that can be used in a wide spectrum of applications. A […]

App note: Practical heat sink design for illumination

White paper from Lumileds on efficient heat sink for LED illumination. Link here (PDF) LEDs are very small light sources that offer great freedom in design for lighting solutions. Within the freedom of an industrial product design, however, one has to make sure that the operating conditions of the LED stays within the ranges as […]

App note: High current LED capacitive drop drive

Fairly old app note from ON Semiconductors on using capacitors to drive LEDs off AC mains. Link here (PDF) This application note describes the basics for powering high current light emitting diodes (LEDs) utilizing a capacitive divider circuit off the AC mains. A linear regulator is used to control the LED current in order to […]

App note: Repetitive short-circuit performances of the MC12XS6 IC’s family

App note from NXP about the short-citcuit protection strategies of their MC12XS6 centralized automotive lighting drivers family IC. Link here (PDF) The MC12XS6 devices include up to five self-protected high-side switches, with its extended protection and diagnostics, to detect bulb outage and short-circuit fault conditions. Additionally, this device incorporates a pulse width modulation control module, […]

App note: LED diagnosis in automotive applications

App note from OSRAM about different approaches on LED string diagnostic in automotive. Link here (PDF) One requirement especially in automotive applications is the diagnosis of failures in functions and systems. Therefore light functions realized with LEDs like break light, daytime running light, low and high beam may require a diagnostics function. This application note […]

App note: Thermal management basics and its importance for LED luminaire performance and cost

Article about thermal management on LED luminaire from TT Electronics. Link here (PDF) LED luminaires are being marketed today as an alternative lighting technology that reduces power consumption and maintenance costs for commercial and residential installations. Thermal management has a significant impact upon the lifetime, performance and cost of an LED luminaire. Without proper application […]

App note: Improve flicker performance of direct AC driven LED fixtures with self valley fill

Application note from ON Semiconductors on LED lighting flicker caused by its own AC supply by adding an improved self valley fill circuit. Link here (PDF) To provide power to LED loads from AC input, SwitchMode Power Supplies (SMPS) are generally used since LED need to be driven by regulated current. Consequently, LED lighting solution […]

App note: Controlling LED lighting using triacs and quadracs

Solid State device and circuits for controlling LEDs lighting, replacing conventional incandescent lamps, an App note from Littlefuse. Link here (PDF) Light Emitting Diodes (LEDs) are fast becoming the most popular lighting option. Industry forecasts anticipate the market will continue to expand at an annual rate of 20% from 2011 to 2016, with the greatest […]

App note: PoE and LED Lighting: the perfect match

App note from MAXIM Integrated on LED lighting utilizing power from PoE. Link here This application note explains that Power-over-Ethernet (PoE) is a technology used in wired local area networks (LANs). PoE delivers power over the same cable that delivers the Ethernet data. Using LED lighting on a PoE network delivers excellent energy efficiency because […]

App Note: Adding intelligence to LED lighting

Here’s a tutorial from Maxim on how to design smarter LED lighting. How smart is your LED lighting system? While LED lighting holds the promise of reducing energy consumption and maintenance costs, smart LED lighting designs improve system performance in both areas, achieving higher performance per watt and reducing cost in the long term. Energy […]