HLMPM251 Optoelectronics

Voltage - Forward (Vf) (Typ):	2.2V
Height (Max):	6.24mm
Size / Dimension:	--
Supplier Device Package:	4mm FLAT TOP
Package / Case:	Radial
Features:	--
Wavelength - Peak:	635nm
Wavelength - Dominant:	--
Mounting Type:	Through Hole
Viewing Angle:	80°
Current - Test:	20mA
Series:	--
Lens Style/Size:	Round with Flat Top, 3.99mm
Millicandela Rating:	7mcd
Lens Transparency:	--
Lens Color:	--
Color:	Red
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

The HLMPM251 is a versatile family of LED indicators that are widely used in industrial and commercial applications. Its unique properties make it suitable for a variety of applications, ranging from simple system status indicators to complex 3-D displays. It is a perfect choice for applications that require an LED indicator with wide-angle visibility, bright illumination, and long-lasting illumination. In this article, we will discuss the application fields and working principles of the HLMPM251.

Application Fields

The HLMPM251 is designed to help you achieve eye-catching, high-efficiency LED indication. It can be used in a wide variety of applications, including signaling, status indication, brightening dark areas, highlighting product features, and providing contrast in backlighting applications. It is also ideal for creating 3-D effects on displays, as well as providing illumination in hazardous locations.The HLMPM251 can be used in medical, automotive, industrial, and other environments. It is suitable for use in locations where the ambient temperature ranges from -40 to +85 degrees Celsius. The HLMPM251 can be used in both indoor and outdoor applications, with a wide operating temperature range of -40 to +85 degrees Celsius. It is also resistant to shocks, vibrations, and other environmental factors. Its unique properties make it a great choice for applications that need strong, reliable, and durable LED indication.

Working Principle

The HLMPM251 is a combination of four LEDs in a single package. Two of the LEDs are used for illumination, while the other two provide diffused exposure.The LEDs are connected together in series, which means the four LEDs share the same current. This design improves the illumination effect while reducing the total current consumption. The two illumination LEDs are connected in opposite directions in order to create an alternating-current lighting effect. The two diffused exposure LEDs are connected in parallel to provide a wide angle glow.The HLMPM251 also features three different control options. The power source can be controlled through a logic level input, a pulse width modulation (PWM) input, or an external voltage source. The logic level input allows the user to control the brightness of the LEDs with a simple on/off signal. The PWM input enables the user to adjust the brightness of the LEDs with a variable pulse width. Finally, the external voltage source provides a constant current through the LEDs, allowing for more precise control over the brightness.

Conclusion

The HLMPM251 is a versatile family of LED indicators that are perfect for applications requiring wide-angle visibility, bright illumination, and long-lasting illumination. It is resistant to environmental factors and can be used in both indoor and outdoor applications, with a wide operating temperature range of -40 to +85 degrees Celsius. It is also equipped with three different control options, which allow for more precise control over the brightness.In conclusion, the HLMPM251 is a great choice for any application requiring LED indication. Its versatility, durability, and control options make it a perfect choice for a variety of applications.

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