## Electronic Specifications and Overview: CPL2-4-50TR-R The **CPL2-4-50TR-R** is a high-frequency, surface-mount **Coupled Inductor** (also referred to as a Common Mode Choke or Dual Inductor) manufactured by Eaton (formerly Bussmann). It is primarily designed for high-density power applications such as multiphase regulators and Vcore applications. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 50 nH (Nominal) | | **Number of Phases** | 2 | | **Isat (Saturation Current)** | ~40A per phase | | **DCR (DC Resistance)** | ~0.6 mΩ (Max) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Package Dimensions** | ~7.5mm x 4.0mm x 5.0mm | --- ### 2. Core Functional Features * **Coupled Inductor Design:** Unlike standard inductors, the two windings are magnetically coupled. In a multiphase buck converter, this allows for **current ripple cancellation**, which improves efficiency and enables faster transient response. * **Low DCR:** The very low Direct Current Resistance (0.6 mΩ) minimizes power loss due to heat, making it ideal for high-current low-voltage rails (like CPU/GPU cores). * **High Saturation Current:** It is designed to handle high peak currents without the magnetic core "saturating," which would otherwise cause a loss of inductance. * **Halogen Free & RoHS Compliant:** Meets modern environmental safety standards for electronic manufacturing. --- ### 3. Application Use Cases This part is specifically engineered for high-performance power management environments: 1. **Vcore Regulators:** Used in servers and workstations to power CPUs. 2. **Multi-phase Buck Converters:** Acting as the output filter where two phases are combined to reduce output voltage ripple. 3. **Voltage Regulator Modules (VRMs):** Found on high-end motherboards and data center hardware. 4. **Point-of-Load (POL) Converters:** High-efficiency power delivery near the integrated circuit. --- ### 4. Circuit Representation In a schematic, this part consists of two inductors sharing a single magnetic core: ```text Phase 1 In o----( L1 )----o Phase 1 Out ) ( <-- Magnetic Coupling Phase 2 In o----( L2 )----o Phase 2 Out ```