The **LOP476-R2T1-24** is a specific part number for a Surface Mount Device (SMD) Light Emitting Diode (LED) manufactured by OSRAM Opto Semiconductors (now ams OSRAM). It belongs to the **Mini TOPLED** family. --- ### 1. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Color** | Green (587 nm / 570 nm range) | | **Luminous Intensity** | 112 mcd to 355 mcd | | **Forward Voltage ($V_F$)** | Typ. 2.0V (Range: 1.8V - 2.4V) | | **Operating Current ($I_F$)** | 20 mA (Standard test current) | | **Viewing Angle** | 120° (Lambertian emitter) | | **Package Type** | SMT (Mini TOPLED), white PLCC-2 package | | **Mounting Type** | Surface Mount | --- ### 2. Breakdown of the Part Number The alphanumeric code contains specific information about the binning and performance of the LED: 1. **LO**: Refers to the product family (Mini TOPLED). 2. **P476**: Refers to the specific LED chip technology (usually AlGaInP) and physical package size. 3. **R2T1**: This is the **Brightness Binning**. It indicates the luminous intensity range: * **R2**: 140 – 180 mcd * **S1**: 180 – 224 mcd * **S2**: 224 – 280 mcd * **T1**: 280 – 355 mcd 4. **24**: This is the **Color/Wavelength Binning**. It defines the specific shade of green/yellow-green within the 566 nm to 575 nm range. --- ### 3. Key Features and Applications ### Features * **High Reliability:** Designed to withstand harsh environmental conditions, often meeting AEC-Q101 standards for automotive use. * **Wide Viewing Angle:** The 120-degree angle makes it ideal for backlighting and indicators where uniform light distribution is required. * **Compact Design:** The Mini TOPLED footprint is smaller than standard TOPLEDs, saving PCB real estate. ### Common Applications * **Automotive:** Dashboard illumination, switches, and internal ambient lighting. * **Industrial:** Status indicators on control panels and signal lights. * **Consumer Electronics:** Backlighting for LCDs, keys, and buttons. * **Telecommunications:** Indicator lights for routers and modems. --- ### 4. Typical Circuit Integration When designing a circuit for this LED, a current-limiting resistor is required. Using Ohm's Law ($R = (V_{source} - V_F) / I_F$): ```python # Example Calculation for a 5V Supply V_source = 5.0 # Volts V_f = 2.0 # Forward Voltage of LOP476 I_f = 0.02 # Target current 20mA Resistor_Value = (V_source - V_f) / I_f # Result: 150 Ohms ``` ---