## Technical Overview of CPL2-2-50TR-R The **CPL2-2-50TR-R** is a high-frequency, surface-mount **Coupled Inductor** (also referred to as a Common Mode Choke or Dual Inductor) manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the CPL series, specifically designed for high-density power applications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 50 nH per winding | | **Current Rating (Irms)** | ~27A to 40A (Design dependent) | | **DC Resistance (DCR)** | Extremely Low (Approx. 0.6 mΩ per phase) | | **Number of Phases** | 2 | | **Package / Case** | SMD (approx. 7.0 x 6.0 x 5.0 mm) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMT) | --- ### 2. Functional Characteristics The CPL2-2-50TR-R is not a standard inductor; it is a **Coupled Inductor** utilized primarily in multi-phase voltage regulator modules (VRMs). * **Magnetic Coupling:** The two windings are wound on a single core. This allows for magnetic flux cancellation, which helps reduce steady-state ripple current while maintaining fast transient response. * **Low DCR:** The use of flat wire or heavy copper plating ensures extremely low DC resistance, which translates to high efficiency and minimal heat generation under high current loads. * **High Frequency:** It is optimized for switching frequencies ranging from 300 kHz to over 2 MHz. --- ### 3. Common Applications This component is typically found in high-performance computing environments where space is limited and current demands are high: 1. **Vcore Regulators:** Powering CPUs and GPUs in servers and workstations. 2. **Multi-phase Buck Converters:** Used in Point-of-Load (POL) modules to convert high voltage (12V) down to sub-1V levels. 3. **Data Centers:** High-density power supplies where efficiency and thermal management are critical. --- ### 4. Part Number Breakdown * **CPL:** Coupled Inductor Series. * **2:** Number of phases (2 windings). * **2:** Size/Series identifier. * **50:** Inductance value (50 nanohenries). * **TR:** Tape and Reel packaging. * **-R:** RoHS compliant. ---