### HLMP-CB11-R0CDD: Technical Overview The **HLMP-CB11-R0CDD** is a high-brightness Blue LED manufactured by Broadcom (formerly Avago Technologies). It is part of the HLMP-Cx11 series, which uses InGaN (Indium Gallium Nitride) technology to provide high light output and a well-defined radiation pattern. --- ### 1. Key Technical Specifications | Parameter | Value / Specification | | :--- | :--- | | **Color** | Blue | | **Wavelength (Dominant)** | 470 nm (Typical) | | **Luminous Intensity** | 1,500 mcd to 2,900 mcd | | **Viewing Angle** | 15° (Narrow Beam) | | **Package Size** | T-1 ¾ (5mm) | | **Forward Voltage (Vf)** | 3.2V (Typical) | | **Forward Current (If)** | 20mA (Standard) / 30mA (Max) | | **Lens Shape** | Round, Clear, Non-diffused | --- ### 2. Physical and Material Characteristics * **Technology:** The device is built on **InGaN** material, which allows for significantly higher efficiency and brightness compared to older SiC-based blue LEDs. * **Package Type:** It features a standard **5mm (T-1 ¾) plastic package**. * **Optical Design:** The lens is clear and non-diffused. This, combined with the internal reflector, creates a **15-degree viewing angle**, making it ideal for directional lighting rather than wide-area illumination. * **Leads:** The leads are typically silver-plated for high conductivity and ease of soldering. --- ### 3. Part Number Breakdown (Nomenclature) The part number identifies specific bins for intensity and color: * **HLMP:** High-Luminous Multi-Purpose series. * **C:** Blue color family. * **B:** 15° viewing angle specification. * **11:** Product generation/series designator. * **R0:** Minimum Luminous Intensity Bin (R = 1500 mcd). * **CDD:** Specific color and packaging binning codes (ensuring consistency in color wavelength). --- ### 4. Typical Applications Due to its high intensity and narrow beam, this LED is commonly used in: 1. **Electronic Signs and Signals:** Variable message signs and traffic signals. 2. **Commercial Outdoor Advertising:** Large-screen video displays. 3. **Industrial Equipment:** Status indicators that must be visible in high-ambient light conditions (sunlight readable). 4. **Decorative Lighting:** Architectural highlighting and accent lighting. --- ### 5. Circuit Design Considerations To operate this LED safely, a current-limiting resistor is required. **Example Calculation:** If using a 5V power supply: ```text R = (V_supply - V_forward) / I_forward R = (5V - 3.2V) / 0.02A R = 90 Ohms (Standard value: 100 Ohms) ```