Series:	*
Part Status:	Active
Lead Free Status / RoHS Status:	--
Moisture Sensitivity Level (MSL):	--

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593242424313F Application Field and Working Principle

• LEDs - Circuit Board Indicators:

LEDs (Light Emitting Diodes) are a type of semiconductor light source, which emit light by converting electric current into light energy. The typical LED is a two-terminal device that may be used in a variety of applications, from general indication to display backlighting. LEDs are ideal for circuit board indication since they are low power, highly efficient and durable devices. Their small size and low-cost per LED makes them ideal for low-profile circuitry, including indicators, displays and systems.LED circuit board indicators can be used in myriad applications, such as medical, industrial and automotive equipment, computer peripherals and consumer products. As such, LEDs are found in nearly every type of electrical device, from home electronics to mass transportation lighting. LEDs are designed to provide desirable features, such as low power draw, bright visible illumination and design flexibility, as well as high efficiency and low maintenance costs. The working principle of LED circuit board indicators involves the phosphor contained in the LED. This phosphor absorbs energy from the LED, emitting light in the visible spectrum. The LED has two pn-junctions that enable electrons to travel across the junction and emit photons (light). The intensity of the light emitted by the LED is determined by the type of semiconductor material used and the drive current supplied to the LED.

• Light Bars, Arrays and Bar Graphs:

LED light bars, arrays and bar graphs are used in numerous applications and are available in a variety of sizes, shapes and colors. Light bars, for instance, can be used for residential applications such as back lighting, accent lighting, and cabinet lighting. They can also be used in commercial applications such as industrial displays, commercial advertisement signs and architectural accents.LED light arrays are designed to provide high visibility in the darkest environments and can be used in any application that requires constant light. This type of LED system is ideal for applications such as outdoor security lighting, vehicular safety lights, and night time road signage. LEDs arrays can also be used in storefront lighting, amusement facilities and gaming consoles.LED bar graphs are usually mounted vertically and may be used to display graphical information. These types of displays are often used in audio applications, including studio monitors and sound-level meters. Bar graphs typically feature individual lights for each level, with each light corresponding to a dB range.The working principle of these types of LEDs is essentially the same as that of individual indicators. The array consists of multiple LEDs that are connected in parallel, and each LED is controlled by its own drive current. The current is proportional to the voltage applied to each LED, which determines the corresponding level of brightness. The total current supplied to the array is sufficient to power all of the LEDs in the system.

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