### HLMP-BL01-R0RYY: Technical Overview The **HLMP-BL01-R0RYY** is a high-brightness Blue LED manufactured by Broadcom (formerly Avago Technologies). It belongs to the T-1¾ (5mm) precision optical performance oval LED series, specifically designed for outdoor signage and signals. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and optical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Color** | Blue | | **Dominant Wavelength** | 470 nm (Typical) | | **Luminous Intensity** | 310 mcd to 1150 mcd (Range) | | **Viewing Angle** | 70° x 35° (Oval) | | **Forward Current ($I_F$)** | 30 mA (Max) | | **Forward Voltage ($V_F$)** | 3.2V (Typical) / 3.8V (Max) | | **Lens Shape** | Oval (T-1¾ / 5mm) | | **Technology** | InGaN (Indium Gallium Nitride) | --- ### 2. Functional Characteristics * **Oval Viewing Profile:** Unlike standard round LEDs, this part has an oval radiation pattern. This is achieved through precision optical molding, making it ideal for wide-angle viewing in a horizontal direction while minimizing light waste in the vertical direction. * **Material Science:** It utilizes **InGaN** (Indium Gallium Nitride) technology, which provides superior light output efficiency and stable performance across a wide temperature range. * **Environmental Durability:** The leads are typically epoxy-coated to provide moisture resistance, making them suitable for variable weather conditions. --- ### 3. Part Number Decoding (R0RYY suffix) In the Broadcom/Avago nomenclature, the suffix provides specific binning information: * **R0:** Refers to the intensity bin (minimum luminous intensity). * **RYY:** Usually refers to the color bin and packaging selection (e.g., bulk vs. ammo pack). --- ### 4. Common Applications Due to its high intensity and specific viewing angle, the HLMP-BL01 is frequently used in: 1. **Variable Message Signs (VMS):** Highway traffic signs and information boards. 2. **Full-Color Outdoor Displays:** Large scale LED video walls. 3. **Commercial Advertising:** Billboards where high visibility under sunlight is required. 4. **Passenger Information:** Transit arrival/departure displays. --- ### 5. Design Considerations ```c /* Circuit Design Tip */ // To drive this LED at a typical 20mA from a 5V source: // R = (V_source - V_forward) / I_forward // R = (5V - 3.2V) / 0.02A = 90 Ohms ``` * **Thermal Management:** Ensure proper lead spacing and airflow, as InGaN LEDs are sensitive to junction temperature increases which can lead to color shifting. * **ESD Sensitivity:** This device is Class 1C (HBM) sensitive. Handle with appropriate anti-static precautions.