## Overview of the UP5-221-R The **UP5-221-R** is a high-performance, shielded power inductor belonging to the **UP5 series** manufactured by Eaton (formerly Bussmann/Coiltronics). These components are specifically designed for high-density power applications where space is limited and electromagnetic interference (EMI) must be minimized. --- ### Technical Specifications The following table outlines the primary electrical and physical characteristics of the UP5-221-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 220 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | ~0.76 Amperes | | **Saturation Current (Isat)** | ~0.84 Amperes | | **DC Resistance (DCR)** | ~0.595 Ohms (Typical) | | **Package Type** | Surface Mount (SMD) | | **Shielding** | Magnetically Shielded | | **Operating Temperature** | -40°C to +125°C | --- ### Key Electronic Features 1. **Magnetic Shielding**: The "Shielded" construction ensures that the magnetic flux remains contained within the component. This is critical for preventing interference with neighboring sensitive circuits on a PCB. 2. **Drum Core Construction**: It utilizes a ferrite drum core which provides high energy storage density and low core losses at high frequencies. 3. **Flat Top Surface**: Designed for high-speed automated "pick and place" assembly processes. 4. **Low DCR**: The design focuses on minimizing Direct Current Resistance to reduce heat generation and improve overall power efficiency. --- ### Common Applications The UP5-221-R is typically found in the following electronic environments: * **DC-DC Converters**: Used as an energy storage element in buck, boost, or SEPIC converters. * **LED Drivers**: Managing current stability for high-intensity lighting. * **Telecommunications**: Powering base stations or networking hardware where low noise is required. * **Computer Peripherals**: Voltage regulation modules (VRMs) for laptops and desktop components. --- ### Pinout and Mechanical Footprint While the specific dimensions can vary slightly by revision, the UP5 series generally follows a standardized SMD footprint: ```text Top View _______________ | | | 221 | <-- Part Marking |_______________| [pad] [pad] <-- Solder Terminations ```