The **HLMP-AB11-R0RYY** is a high-brightness oval LED manufactured by Broadcom (formerly Avago Technologies). It is specifically engineered for outdoor signage and signals where high visibility in sunlight is required. --- ### ## 1. Key Technical Specifications The following table summarizes the primary electrical and optical characteristics of the HLMP-AB11-R0RYY: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Color** | Blue | 470 nm (Dominant Wavelength) | | **Luminous Intensity** | 460 - 1150 mcd | Varies by binning | | **Forward Voltage ($V_f$)** | 3.2V - 3.8V | Typical operating range | | **Forward Current ($I_f$)** | 30 mA | Maximum continuous rating | | **Viewing Angle** | 70° x 35° | Oval (Asymmetric) pattern | | **Package Type** | T-1¾ (5mm) | Through-hole mounting | | **Lens Profile** | Tinted & Diffused | Optimized for color consistency | --- ### ## 2. Core Features * **Oval Spatial Pattern:** Unlike standard round LEDs, this part has a 70° horizontal and 35° vertical viewing angle. This "spreads" the light horizontally, making it ideal for passengers or pedestrians to see from different side angles. * **Standoff Options:** The "AB11" designation typically refers to the lead configuration, often featuring "standoffs" (small bumps on the leads) to ensure consistent seating height on a PCB. * **InGaN Technology:** It utilizes Indium Gallium Nitride (InGaN) material, which allows for high efficiency and high light output in the blue spectrum. * **Environment Resistance:** The epoxy contains UV inhibitors to prevent the lens from yellowing or becoming brittle when exposed to direct sunlight over long periods. --- ### ## 3. Common Applications Due to its color and radiation pattern, this component is frequently found in: 1. **Full-Color Video Screens:** Used as the "Blue" pixel in large outdoor LED billboards. 2. **Variable Message Signs (VMS):** Highway traffic signs and information displays. 3. **Commercial Advertising:** Shopfront signs and stadium displays. --- ### ## 4. Schematic Connection To use this LED in a circuit with a 5V supply, a current-limiting resistor is required to prevent burnout. ```cpp // Example Calculation for Resistor (R): // R = (V_supply - V_forward) / I_forward // R = (5.0V - 3.2V) / 0.020A = 90 Ohms ```