The term **LED98** typically refers to a specific series of high-power LED components or infrared (IR) emitters, often used in professional lighting, remote controls, or sensing equipment. Below is a breakdown of the electronic parts and characteristics associated with these components. --- ## 1. Core Component Breakdown An LED98-style component is comprised of several integrated layers and materials that dictate its electrical behavior: | Component Part | Material/Description | Function | | :--- | :--- | :--- | | **Semiconductor Die** | Gallium Arsenide (GaAs) or AlGaAs | The heart of the LED where electron-hole recombination occurs to produce light. | | **Bonding Wire** | Gold (Au) | Connects the semiconductor die to the lead frame for electrical continuity. | | **Encapsulant** | Epoxy Resin or Silicone | Protects the die and acts as a lens to focus the light beam. | | **Lead Frame** | Copper alloy with Silver plating | Provides structural support and acts as the electrical terminals (Anode/Cathode). | | **Heat Sink Pad** | Thermal conductive ceramic/metal | Dissipates heat generated during high-current operation. | --- ## 2. Electrical Characteristics When designing a circuit for an LED98, the following electronic parameters are critical for stability and performance: ### Forward Voltage ($V_F$) Usually ranges between **1.2V and 1.7V** for Infrared versions, or **2.0V to 3.6V** for visible spectrum versions. Exceeding this without a resistor will destroy the junction. ### Forward Current ($I_F$) Standard parts often operate at **20mA to 100mA**, though high-power variants can handle up to **1A** in pulsed modes (common in IR remote applications). ### Peak Wavelength ($\lambda p$) For IR-LED98 series, the wavelength is typically **940nm** (invisible to the human eye) or **850nm** (slight red glow). --- ## 3. Example Driver Circuit To power an LED98 safely, a current-limiting resistor must be placed in series. Here is a basic representation: ```cpp // Basic Calculation for Current Limiting Resistor // Formula: R = (Source_Voltage - Forward_Voltage) / Desired_Current Source (5V) ---- [Resistor 180 Ohm] ---- [LED98 Anode] | [LED98 Cathode] ---- Ground (0V) ``` --- ## 4. Key Applications * **Infrared Communication:** Used in high-speed data transmission and remote controls. * **CCTV Illumination:** Providing night vision light sources for security cameras. * **Optical Sensors:** Used in industrial "break-beam" sensors to detect the presence of objects.