## Overview of the LRTB-R98G The **LRTB-R98G** is a high-performance, surface-mount (SMD) Multi-LED manufactured by **ams OSRAM**. It is part of the Multi CHIPLED family, specifically designed for video walls, indoor signage, and decorative lighting. It features three independent chips (Red, True Green, and Blue) within a single compact package. --- ### 1. Key Technical Specifications | Parameter | Red (λ = 623nm) | True Green (λ = 530nm) | Blue (λ = 471nm) | | :--- | :--- | :--- | :--- | | **Material** | AlGaInP | InGaN | InGaN | | **Luminous Intensity** | 65 - 130 mcd | 165 - 335 mcd | 25 - 56 mcd | | **Forward Voltage (typ.)** | 2.0 V | 2.8 V | 2.8 V | | **Max Current ($I_F$)** | 20 mA | 20 mA | 20 mA | | **Viewing Angle** | 120° | 120° | 120° | --- ### 2. Physical Structure and Pinout The LRTB-R98G utilizes a **6-pin configuration**, meaning each color channel has its own dedicated anode and cathode. This allows for precise control of each color via Pulse Width Modulation (PWM). #### Internal Diagram Logic ```text Pin 1: Cathode (Blue) Pin 6: Anode (Blue) Pin 2: Cathode (True Green) Pin 5: Anode (True Green) Pin 3: Cathode (Red) Pin 4: Anode (Red) ``` * **Package Dimensions:** 0.95 mm x 0.95 mm x 0.45 mm (extremely small footprint). * **Encapsulation:** Black surface for high contrast, which is essential for video wall applications to ensure deep blacks. --- ### 3. Electronic Characteristics * **Common Cathode/Anode:** Since all 6 pins are independent, it is neither strictly common cathode nor common anode; however, it is most frequently wired in a **Common Anode** configuration on PCBs to interface with standard LED driver ICs. * **ESD Robustness:** It features an ESD withstand voltage up to **2kV** (HBM) due to integrated protection diodes for the InGaN chips (Green and Blue). * **Binning:** ams OSRAM provides specific brightness and color bins to ensure uniformity across large displays. --- ### 4. Application Considerations 1. **Heat Dissipation:** Due to the high density of these LEDs in video walls, thermal management is critical. The small package size offers limited surface area for cooling. 2. **Driving Method:** Constant current drivers (like the TI TLC59 series or Macroblock MBI series) are recommended to maintain color consistency. 3. **Contrast Enhancement:** The "R98G" variant is prized for its **diffused black package**, which minimizes reflections from ambient light.