## Overview of HLMP-EG10-R2000 The **HLMP-EG10-R2000** is a high-intensity, precision optical performance AllnGaP (Aluminum Indium Gallium Phosphide) Red LED. It is manufactured by Broadcom (formerly Avago Technologies) and is specifically designed for outdoor applications where sunlight readability is critical. --- ### Technical Specifications The following table summarizes the primary electrical and optical characteristics of the HLMP-EG10-R2000: | Parameter | Specification | | :--- | :--- | | **LED Color** | Red (AllnGaP) | | **Wavelength (Peak)** | 639 nm | | **Dominant Wavelength** | 626 nm | | **Luminous Intensity** | 1500 mcd to 3200 mcd | | **Viewing Angle** | 15 Degrees (Tight Beam) | | **Forward Current ($I_f$)** | 20 mA (Typical) | | **Forward Voltage ($V_f$)** | 2.1 V (Typical) / 2.4 V (Max) | | **Package Type** | T-1 ¾ (5mm) Through-hole | | **Lens Appearance** | Tinted, Non-diffused | --- ### Key Features and Construction 1. **Material Technology:** It utilizes **AllnGaP II** technology, which provides a higher light output efficiency compared to older GaP or AlGaAs technologies. 2. **Optical Design:** The LED features a 15-degree viewing angle. This narrow radiation pattern is achieved through a precise molded lens, ensuring that the light is concentrated for long-distance visibility. 3. **Environmental Durability:** The package includes an epoxy resin that contains UV inhibitors to reduce the effects of long-term exposure to direct sunlight. 4. **Heat Resistance:** The leads are designed for high-temperature soldering, allowing for standard wave soldering processes. --- ### Pin Configuration and Circuitry The device follows the standard 5mm LED pinout: * **Anode (+):** The longer lead. * **Cathode (-):** The shorter lead, usually accompanied by a flat edge on the LED base flange. #### Basic Driver Circuit To operate this LED safely with a 5V DC source, a current-limiting resistor is required. ```python # Formula: R = (V_source - V_forward) / I_forward # R = (5V - 2.1V) / 0.020A # R = 145 Ohms (Use a standard 150 Ohm resistor) ``` --- ### Common Applications * **Variable Message Signs (VMS):** Highway and traffic signals. * **Commercial Outdoor Advertising:** Large-scale LED billboards. * **Industrial Status Indicators:** Sunlight-readable control panels. * **Solar Powered Signage:** High efficiency allows for lower power consumption.