The **QBHP682-RU** is a high-power Infrared (IR) LED manufactured by **QT-Brightek**. It belongs to the high-performance emitter series designed for applications requiring intense infrared illumination. --- ### 1. Key Technical Specifications Below are the primary electronic and optical characteristics of the device: | Parameter | Value/Specification | |:---|:---| | **Wavelength ($\lambda_p$)** | 850 nm (Infrared) | | **Forward Current ($I_f$)** | 350 mA (Standard) / 700 mA (Max) | | **Forward Voltage ($V_f$)** | 1.4V - 1.8V (Typical) | | **Radiant Intensity** | ~180 mW/sr @ 350mA | | **Viewing Angle** | 120° (Wide Angle) | | **Package Type** | 3535 (3.5mm x 3.5mm) Ceramic Surface Mount | | **ESD Sensitivity** | Up to 8KV (HBM) | --- ### 2. Core Features * **High Efficiency:** Utilizes AlGaAs/GaAs technology to provide high radiant flux with low power consumption. * **Thermal Management:** The ceramic substrate provides excellent thermal dissipation, allowing the LED to run at higher currents without immediate degradation. * **Standard Footprint:** The 3535 SMD package is industry-standard, making it compatible with many existing PCB layouts for high-power LEDs. * **Moisture Sensitivity:** Typically rated at MSL Level 3. --- ### 3. Application Use Cases Due to its 850nm wavelength, which is slightly visible to the human eye (as a faint red glow) but highly sensitive to CMOS sensors, it is used in: 1. **CCTV/Surveillance:** IR illumination for night vision cameras. 2. **Biometrics:** Iris scanning and facial recognition systems. 3. **Machine Vision:** Industrial inspection where visible light might interfere with the process. 4. **Gesture Recognition:** Used in motion-tracking sensor arrays. --- ### 4. Hardware Integration Tips When designing a circuit for the QBHP682-RU, consider the following: * **Current Regulation:** Always use a constant current driver rather than a simple resistor, as IR LEDs have low forward voltages and are sensitive to thermal runaway. * **Heat Sinking:** Ensure the PCB has adequate copper "thermal vias" under the center pad to move heat away from the junction. * **Polarity:** Note the cathode mark on the SMD package; reversing the voltage can damage the diode if it exceeds the maximum reverse voltage (usually 5V).