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Introduction to HLMP-EL2T-XZLDD for LED Indication - Discrete

HLMP-EL2T-XZLDD is an LED indication light from the series of discrete LEDs from Avago. This series of digital signal indicators, consisting of up to 3 LEDs and housings, is used in a variety of applications from signal indicators and backlights, to indicators for signal logic, temperature, audio and digital devices. This article will discuss the application field, signal logic and working principle of the HLMP-EL2T-XZLDD.

Application Field

The HLMP-EL2T-XZLDD is suitable for a wide range of applications both indoors and outdoors. For example, it is applicable in industrial controls, instrumentation and medical devices, because of its wide operating temperature range (-40C to +100C). In addition, it is used in the military, automotive and aerospace industries, as it is able to withstand extreme shock, vibration and humidity. Furthermore, its compact size and light weight makes it suitable for use in mobile applications, such as cellular phones and PDAs. Lastly, its low power consumption and long life make it a great choice for power saving applications, such as battery powered devices.

Signal Logic

The HLMP-EL2T-XZLDD uses a 3-way signal logic with a single input and three outputs to indicate the status of the device. A logic low (or "0") is indicated by one LED, a logic high (or "1") is indicated by two LEDs and an open circuit (or "open collector") is indicated by all three LEDs. This allows the user to easily identify the status of the device simply by looking at the LED indication.

Working Principle

The HLMP-EL2T-XZLDD is designed to use a DC voltage of 30 volts or less to provide illumination. The LEDs are connected in parallel, with resistors in series with each LED. The resistors are used to limit the current, thus preventing overcurrent or reverse-flow of voltage. When the LEDs are connected to a power supply, the power passes through the resistors, thus providing the desired brightness level.

When the device is connected to a source of logic signals, the level of the logic signals determines the brightness of the LEDs. A logic low signal provides the highest level of brightness, a logic high signal provides a reduced level of brightness and an open circuit provides zero brightness. This allows the user to easily identify the logic state of the device.

Conclusion

The HLMP-EL2T-XZLDD is a robust and cost-effective LED indication light, suitable for a wide range of applications. Its application field includes industrial, military, automotive and aerospace, as well as portable and power saving applications. The HLMP-EL2T-XZLDD uses a 3-way signal logic to indicate the status of the device and its working principle is based on the concept of using resistors to limit the current. This makes the HLMP-EL2T-XZLDD an ideal choice for LED indication.

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