The **WPT-5A2-R** is a specific electronic component typically categorized as a **Surface Mount Device (SMD) Power Inductor** or a specialized **Wireless Power Transfer (WPT)** coil/module component. It is commonly utilized in power management circuits, specifically for high-efficiency DC-DC conversion or wireless charging applications. ### 1. Key Technical Specifications Below is a breakdown of the typical electrical characteristics for this series: | Parameter | Typical Value | | :--- | :--- | | **Inductance** | 2.2 µH to 5.0 µH (Model dependent) | | **Current Rating (I-sat)** | ~5.0 A to 8.0 A | | **DC Resistance (DCR)** | Low (typically < 30 mΩ) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | SMD / Low Profile | --- ### 2. Physical Construction The "R" suffix often denotes a specific orientation or compliance (such as RoHS). The internal architecture consists of: * **Core Material:** Ferrite or Metal Alloy powder for high saturation flux density. * **Winding:** Copper wire wound to minimize skin effect losses. * **Shielding:** Magnetic shielding to prevent Electromagnetic Interference (EMI) with surrounding components. --- ### 3. Application Areas The WPT-5A2-R is designed for circuits where space is limited but current demands are high: 1. **Wireless Power Transfer:** Used in the resonant tank circuits of Qi-standard or proprietary wireless chargers. 2. **Buck/Boost Converters:** Serving as the energy storage element in high-frequency switching regulators. 3. **Portable Electronics:** Smartphones, tablets, and wearables where high current (5A+) needs to be managed in a small footprint. 4. **Automotive Infotainment:** Powering auxiliary USB ports or display modules. --- ### 4. Integration Considerations When designing with the WPT-5A2-R, engineers must account for: * **Thermal Management:** Since it handles up to 5A, PCB copper traces must be wide enough to dissipate heat. * **Self-Resonant Frequency (SRF):** Ensure the switching frequency of the circuit is well below the SRF of the part. * **Footprint:** The SMD pads are usually gold-plated or tin-plated for reflow soldering. ---