## HLMP-CB11-R0D00: Technical Overview The **HLMP-CB11-R0D00** is a high-brightness Blue LED manufactured by Broadcom (formerly Avago Technologies). It belongs to the T-1 ¾ (5mm) precision optical performance oval LED series, specifically designed for outdoor applications and signage. --- ### 1. Key Technical Specifications | Parameter | Value | Details | | :--- | :--- | :--- | | **Color** | Blue | InGaN technology | | **Dominant Wavelength** | 470 nm | Standard blue spectrum | | **Luminous Intensity** | 520 - 1500 mcd | Measured at 20mA | | **Forward Current ($I_f$)** | 30 mA | Maximum continuous | | **Forward Voltage ($V_f$)** | 3.2V (Typ) / 3.8V (Max) | Standard for Blue LEDs | | **Viewing Angle** | 40° x 100° | Oval/Elliptical spatial radiation | | **Package Type** | T-1 ¾ (5mm) | Through-hole | | **Lens Type** | Tinted, Non-diffused | Optimized for contrast | --- ### 2. Core Electronic Characteristics #### A. InGaN Technology The device utilizes **Indium Gallium Nitride (InGaN)** material technology. Unlike older SiC (Silicon Carbide) blue LEDs, InGaN offers significantly higher luminous efficiency and superior brightness, which is essential for daylight visibility. #### B. Spatial Radiation Pattern The "Oval" designation refers to its specific light distribution. The lens is shaped to provide a wide horizontal viewing angle (100°) and a narrower vertical angle (40°). This makes it ideal for **Variable Message Signs (VMS)** where viewers are spread horizontally (across a highway) but limited vertically. #### C. Thermal Management The part includes an internal lead-frame design to dissipate heat. However, because InGaN LEDs are sensitive to temperature, the forward current must be derated if the ambient temperature exceeds 50°C to prevent "thermal runaway" or degradation of the epoxy. --- ### 3. Application Use-Cases * **Full-Color Video Screens:** Used as the blue component in RGB pixel clusters for outdoor stadium displays. * **Traffic Signage:** Suitable for lane control and pedestrian signals due to its high contrast. * **Commercial Advertising:** Billboards where wide horizontal visibility is required. --- ### 4. Circuit Design Considerations When integrating the HLMP-CB11-R0D00, keep the following in mind: 1. **Current Limiting:** Always use a series resistor or constant-current driver. * *Formula:* $R = (V_{source} - V_f) / I_f$ 2. **Reverse Voltage:** The maximum reverse voltage ($V_r$) is usually **5V**. Do not subject the LED to reverse bias beyond this point, as InGaN structures are sensitive to ESD and reverse breakdown. 3. **ESD Sensitivity:** This part is Class 1C (HBM) sensitive. Use anti-static wrist straps during assembly.