The **TP4212-220M-R** is a high-performance power inductor commonly used in DC-DC converters, battery-powered devices, and compact consumer electronics. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the component's core specifications: | Component Segment | Description | | :--- | :--- | | **TP** | Series/Manufacturer prefix (often associated with high-current power inductors). | | **4212** | Physical Dimensions (approx. 4.0mm x 4.0mm x 1.2mm). | | **220** | Inductance Value (22 followed by 0 zeros = **22µH**). | | **M** | Tolerance (M = **±20%**). | | **R** | Packaging/RoHS compliance (usually denotes Tape & Reel). | --- ### 2. Key Technical Specifications While exact values can vary slightly by manufacturer (e.g., Tai-Tech or similar equivalents), the general profile for a 220M-R inductor in this size is as follows: * **Inductance:** 22 µH * **DC Resistance (DCR):** Typically ranges between **0.40Ω to 0.60Ω** (Max). * **Rated Current (Isat):** The current at which inductance drops (typically around **0.4A to 0.7A**). * **Operating Temperature:** -40°C to +125°C. * **Construction:** Magnetic shielded (minimizes EMI/Electromagnetic Interference). --- ### 3. Structural Features * **Shielded Design:** The "Magnetic Shield" prevents magnetic flux from interfering with nearby components, which is critical for high-density PCB layouts. * **Low Profile:** The "12" in the part number indicates a height of approximately 1.2mm, making it ideal for slim devices like smartphones or wearables. * **Surface Mount (SMD):** Designed for automated pick-and-place assembly. --- ### 4. Common Applications This inductor is primarily used for energy storage and filtering in: 1. **DC-DC Converters:** Buck, Boost, and SEPIC converters. 2. **LED Drivers:** Providing stable current for backlighting. 3. **Power Management Units (PMICs):** Distributing power in portable electronics. 4. **Noise Suppression:** Acting as a filter for high-frequency noise in signal lines. ---