3688 Optoelectronics

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LED Lighting - COBs, Engines, Modules

Light emitting diodes, more commonly known as LEDs, are an increasingly popular form of lighting due to their energy efficiency, reliability and long life span. LED lighting has made the transition from the high end to the mainstream in recent years, which is due in part to rapid advances in LED technology. LED lighting systems consist of multiple components, each with a dedicated purpose that must be well understood in order to determine their total system performance.

COBs (Chip on Board) and Engines

The heart of any LED lighting system is the LED light engine. A COB, or Chip on Board, is a type of LED light engine that packages multiple LED chips into one unit. COBs offer several advantages, including improved efficiency, better thermal performance, and higher light output compared to traditional LED arrays. These attributes are especially desirable when designing high end architectural and commercial lighting fixtures. COBs are commonly used in applications such as area lighting, downlighting, and wall washing.

LED engines are usually integrated into fixtures, but can also be purchased as individual components. LED engines are designed to be plugged into a lighting fixture, providing installation flexibility. Engine types include RGB (red, green, blue) LED engines, white LED engines, and integrated light engines that combine RGB and white LED modules into a single unit. Each type of engine has a different purpose and must be selected based on the application.

Modules

LED lighting modules are small packages of LEDs that are designed for system integration into various types of fixtures. Modules are usually offered with either an integrated driver, or with an external driver, allowing installers to more easily customize their lighting system to the exact application.

LED modules offer several advantages compared to traditional lighting sources, such as compact size and higher lumen output per watt. Modules are also easy to install, and are suitable for a wide range of applications, including linear, accent, and sign lighting.

3688 Application Field and Working Principle

The 3688 is a multi chip packaging technology developed by Citizen Electronics, that is capable of packaging several LEDs into a single package. It is designed for applications that require high brightness, such as architectural and commercial lighting, signage and expansive area lighting. This type of package has higher efficiency and brightness than traditional LED packages, providing more value for system designers. The 3688 packages are capable of producing up to 90 lumens per watt, which is significantly higher than traditional LED packages.

The working principle of the 3688 package is to combine several LED chips into a single package. This reduces the number of individual die bonds, resulting in less complexity and lower energy consumption. Additionally, the 3688 can be driven directly by a traditional AC voltage, eliminating the need for complex, expensive DC power supplies. The package also incorporates a highly efficient thermal management system that enables superior heat dissipation and ensures reliable performance, even in high wattage applications.

Conclusion

LED technology is constantly advancing, providing new and improved features and efficiency for lighting designers, installers, and consumers alike. COBs, engines and modules are all integral components of an LED lighting system, each designed for different applications and purposes. The 3688 package is an innovative solution for high performance applications, and advances in LED technology have made it increasingly cost effective.

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