The **DR1030-220-R** is a high-performance, shielded power inductor manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). It is commonly used in DC-DC converters and power management circuits. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 22 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.084 Ω (Typical) | | **Irms (Rated Current)** | 2.15 A | | **Isat (Saturation Current)** | 2.22 A | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | SMD (10.5mm x 10.3mm x 3.0mm) | --- ### 2. Breakdown of the Part Number Understanding the nomenclature helps identify the physical and electrical characteristics: * **DR**: Indicates the series (Drum Core). * **1030**: Refers to the physical dimensions. 10mm (length/width) and 3.0mm (height). * **220**: The inductance code. The first two digits are significant figures, and the third is the multiplier. $22 \times 10^0 = 22 \mu H$. * **R**: Denotes that the part is RoHS compliant (lead-free). --- ### 3. Core Features and Applications #### Features: * **Magnetically Shielded:** The design minimizes Electromagnetic Interference (EMI), making it suitable for noise-sensitive environments. * **Low Profile:** With a height of only 3.0mm, it is ideal for thin electronic devices. * **High Power Density:** High current handling capability relative to its small footprint. * **Ferrite Core:** Provides high efficiency and low core losses at high frequencies. #### Typical Applications: 1. **Buck/Boost Converters:** Used in point-of-load (POL) power supplies. 2. **Consumer Electronics:** Laptops, tablets, and handheld devices. 3. **LED Drivers:** Used to stabilize current in lighting applications. 4. **HDD/SSD Power:** Provides clean power to storage drives. --- ### 4. PCB Footprint Considerations The DR1030 series is a surface-mount device (SMD). It features two large solder pads on the bottom. When designing a PCB for this part, ensure: * **Trace Width:** Use wide copper traces to handle the 2.15A current without excessive heating. * **Thermal Relief:** Proper grounding and thermal vias can help dissipate heat generated by the DCR.