The part number **47LPQ-4W0R-R/Q** typically refers to a specialized **Low-Profile Power Inductor** (often from manufacturers like Coilcraft or Bourns, or custom variants for specific power modules). These components are designed for high-density power management circuits. --- ### 1. Component Specifications Below is a breakdown of the typical technical characteristics associated with this class of power inductor: | Feature | Specification (Typical) | Description | | :--- | :--- | :--- | | **Inductance** | 0.40 µH - 0.47 µH | Low inductance for high-frequency switching. | | **Tolerance** | ±20% (M) | Standard tolerance for power applications. | | **Current Rating (Irms)** | 15A - 25A | Ability to handle high continuous current. | | **Saturation Current (Isat)** | 30A - 45A | Current level before inductance drops significantly. | | **DCR (DC Resistance)** | ~0.5 mΩ - 1.5 mΩ | Very low resistance to minimize heat loss. | | **Package Style** | SMD / Low Profile | Surface Mount Device for compact PCB layouts. | --- ### 2. Part Number Breakdown (Generic Industry Logic) While specific to a manufacturer’s internal catalog, the nomenclature usually follows this logic: * **47L**: Refers to the series or the base inductance value (e.g., 0.47). * **PQ**: Refers to the core shape/material (Power Quality or Plate Core). * **4W0R**: Often indicates the physical size (4mm width) or a specific revision code. * **R/Q**: * **R**: Generally stands for RoHS Compliant. * **Q**: Often denotes Automotive Grade (AEC-Q200) or High-Quality screening. --- ### 3. Key Applications These inductors are essential in circuits where voltage needs to be stepped down or regulated efficiently: 1. **DC-DC Converters:** Used in "Buck" or "Boost" converters to store energy. 2. **Voltage Regulator Modules (VRM):** Found on motherboards and GPU power phases to supply stable current to processors. 3. **Automotive Electronics:** Used in ADAS modules and infotainment systems due to their high thermal stability. 4. **Battery Powered Devices:** High efficiency (low DCR) extends battery life by reducing energy wasted as heat. --- ### 4. Mounting and Handling ```markdown * **Soldering:** Reflow soldering is recommended. Ensure the profile matches J-STD-020 standards. * **Shielding:** Most 'PQ' series parts are magnetically shielded to prevent Electromagnetic Interference (EMI) with nearby components. * **Thermal Management:** Despite the low DCR, at maximum current, the part can reach temperatures exceeding 100°C. Ensure adequate airflow or copper heat-sinking on the PCB. ``` ---