SMJB-SL220V15-EA

LED COB - SMJB-SL220V15-EA Application Field and Working Principle

Light emitting diodes (LEDs) are revolutionizing the lighting world. LEDs are now used to replace traditional lighting solutions in a variety of areas, such as general illumination, accent lighting, automotive, street lighting and more. In the past, light sources such as incandescent bulbs and halogen bulbs relied on filament resistance or gas to emit light, but LEDs use no moving parts and require minimal energy to maintain their performance. This makes them more suitable for the more energy conscious future.

LEDs have evolved over time, and chip on board (COB) technology is the latest in LED lighting. A COB is a cluster of many LEDs encapsulated in a single package. This type of arrangement has created many benefits for lighting applications, such as better color rendering, improved brightness, and a longer lifespan.

The SMJB-SL220V15-EA is a chip on board (COB) light engine from Samsung. This COB light engine combines power and reliability, offering the highest light output of all Samsung’s COB light engine models. It has a rated voltage of 220V, and a 15W power input. These performance characteristics make the SMJB-SL220V15-EA an ideal solution for several lighting applications, including general illumination, accent lighting, recessed can lights, wall sconces, and more.

Working Principle of SMJB-SL220V15-EA

The SMJB-SL220V15-EA LED COB light engine is powered by a bipolar voltage source consisting of a pair of conductive PN junctions connected in series. The junctions are separated by an intrinsic region, which acts as a diode. This diode is what gives an LED its forward voltage and current characteristics.

When the voltage across the PN junction is increased, the current through the junction starts to increase exponentially. This is because the electrons present in the PN junction start to flow more freely as the voltage across the junction increases. Once the voltage reaches a certain level, known as the breakdown voltage, the electrons break free, creating a rush of current.

Once breakdown occurs, the current through the PN junction is not only determined by the voltage but also by the physical structure of the LED. For example, the density of the PN junction and the shape of the emitter tip can affect the current flow. This is why LED manufacturers produce light engines in different sizes and shapes to control the light output of the LED.

The SMJB-SL220V15-EA LED COB light engine utilizes this principle to create a powerful light output. Its junction is designed to have a low breakdown voltage, so that the current will increase even at lower voltages. This helps to create a high light output, making it suitable for a variety of lighting applications.