## Technical Overview of UP2B-1R5-R The **UP2B-1R5-R** is a high-performance, shielded power inductor designed by Eaton (formerly Cooper Bussmann/Coiltronics). It is widely used in power management circuits, specifically in DC-DC converters and switching power supplies. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 1.5 µH | | **Tolerance** | ±20% | | **Current Rating (Isat)** | 8.0 Amps (Saturation Current) | | **Current Rating (Irms)** | 5.8 Amps (Heating Current) | | **DC Resistance (DCR)** | 9.0 mΩ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | SMD (Surface Mount Device) | --- ### 2. Physical Characteristics * **Shielding:** It is a **magnetically shielded** component. This is critical for high-density PCB layouts because it minimizes Electromagnetic Interference (EMI) with surrounding components. * **Core Material:** Typically utilizes a ferrite core which offers low core losses at high frequencies. * **Dimensions:** The "UP2B" series usually features a footprint of approximately $14.0\text{mm} \times 10.4\text{mm}$ with a height of $6.0\text{mm}$. --- ### 3. Functional Role in Electronics The UP2B-1R5-R serves several primary functions in a circuit: 1. **Energy Storage:** In switching regulators (like Buck or Boost converters), it stores energy in its magnetic field during the "on" cycle and releases it during the "off" cycle. 2. **Filtering:** It acts as a low-pass filter, smoothing out high-frequency ripple current to provide a steady DC output. 3. **Noise Suppression:** Due to its shielded nature, it prevents switching noise from radiating into other sensitive parts of the system. --- ### 4. Common Applications * **Notebooks and Tablets:** Powering processors and memory modules. * **Telecommunications:** DC-DC line cards and network switches. * **Industrial Controls:** Stable power regulation for sensors and PLCs. * **LED Lighting:** Drivers requiring constant current regulation. --- ### 5. Part Number Breakdown ```text UP 2 B - 1R5 - R | | | | | | | | | +-- RoHS Compliant | | | +------- Inductance Value (1.5 µH) | | +------------ Size/Series Code | +-------------- Power Rating Class +----------------- Uni-Pac Series (Brand/Family) ```