The **L822HW-R68MF** is a high-performance **Surface Mount Device (SMD) Power Inductor**. It is commonly utilized in DC-DC converters and high-current power supplies where efficiency and compact sizing are critical. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the component's specifications: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **L822HW** | Series Code | High-current, low-profile molded power inductor series | | **R68** | Inductance Value | **0.68 µH** (microhenries) | | **M** | Tolerance | **±20%** | | **F** | Environmental | RoHS compliant / Lead-free | --- ### 2. Technical Specifications These parts are engineered for high-frequency applications and high-density PCB layouts. * **Inductance:** 0.68 µH * **DC Resistance (DCR):** Extremely low (typically in the milliohm range) to minimize power loss. * **Saturation Current ($I_{sat}$):** The current level at which the inductance drops by a specific percentage (usually 30%). This part is designed for high saturation levels. * **Heat Rating Current ($I_{rms}$):** The continuous current that causes a specific temperature rise (usually 40°C). * **Construction:** Metal alloy powder molding, which provides excellent magnetic shielding and reduces audible noise. --- ### 3. Key Features * **Shielded Construction:** The molded design acts as a magnetic shield, reducing Electromagnetic Interference (EMI) with neighboring components. * **High Efficiency:** Low DCR ensures minimal energy is wasted as heat, which is vital for battery-powered devices. * **Compact Footprint:** Designed for automated SMT (Surface Mount Technology) assembly. * **Stability:** Maintains stable performance across a wide temperature range (typically -40°C to +125°C). --- ### 4. Common Applications The L822HW-R68MF is typically found in the following circuits: 1. **Voltage Regulator Modules (VRMs):** Used in motherboards and servers to step down voltage for CPUs/GPUs. 2. **Smartphones and Tablets:** Power management ICs (PMICs) for high-efficiency charging. 3. **Graphic Cards:** Providing stable current to high-speed processors. 4. **DC-DC Converters:** Buck, Boost, and Buck-Boost topologies. ---