## Technical Overview of HLMP-AD01-R0TYY The **HLMP-AD01-R0TYY** is a precision optical performance AlInGaP (Aluminum Indium Gallium Phosphide) LED manufactured by Broadcom (formerly Avago Technologies). It is specifically designed for high-brightness applications and outdoor visibility. --- ### 1. Key Electronic Specifications These specifications define the electrical and optical boundaries for the component: | Parameter | Specification | Units | | :--- | :--- | :--- | | **Color** | Red | - | | **Dominant Wavelength** | 630 nm | nm | | **Luminous Intensity (Min/Max)** | 1150 / 2400 | mcd | | **Forward Voltage ($V_f$)** | 1.8 - 2.4 | V | | **Forward Current ($I_f$)** | 20 | mA | | **Viewing Angle** | 30° | Degrees | | **Lens Shape** | Oval / T-1 ¾ (5mm) | - | --- ### 2. Physical & Material Composition The "electronic" nature of this part is rooted in its material science: * **Substrate Material:** **AlInGaP II**. This material provides high luminous efficiency and excellent reliability across temperature fluctuations compared to older GaAsP technologies. * **Encapsulation:** The LED is housed in an epoxy resin that is typically tinted and diffused (or clear) to optimize the radiation pattern. * **Lead Frame:** Standard T-1 ¾ package with long leads for through-hole PCB mounting. --- ### 3. Part Number Breakdown The suffix **R0TYY** provides specific binning information: 1. **HLMP-AD01:** The base series (5mm Red Oval LED). 2. **R:** Intensity Bin (Minimum intensity threshold). 3. **0:** Maximum intensity bin (No upper limit specified beyond standard range). 4. **T:** Color Bin (Specifies the specific red wavelength range). 5. **YY:** Packaging code (Typically refers to bulk or specific tape-and-reel options). --- ### 4. Circuit Implementation When integrating the HLMP-AD01-R0TYY into a circuit, a current-limiting resistor is required to prevent thermal runaway. **Example Calculation:** To run the LED at $20\text{mA}$ from a $5\text{V}$ DC source: ```text R = (V_source - V_f) / I_f R = (5V - 2.0V) / 0.020A R = 150 Ohms ``` --- ### 5. Common Applications * **Variable Message Signs (VMS):** Traffic signals and commercial displays. * **Outdoor Advertising:** Large-scale LED billboards. * **Passenger Information Signs:** Bus and train station arrival/departure boards. * **Solar Powered Signage:** High efficiency allows for lower power consumption. ---