The **LTCEC-115D-R/Q** is a high-precision, current-compensated choke (common-mode inductor) designed by **LTC (Liton Technology Corp)**. These components are primarily used for electromagnetic interference (EMI) suppression in power supply circuits and signal lines. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics: | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Common-Mode Choke (CMC) | | **Inductance** | 1.1 mH to 15 mH (Series dependent) | | **Rated Current** | 0.5A to 2.0A (Application specific) | | **Dielectric Strength** | 1500V AC to 2500V AC | | **Operating Temp** | -25°C to +105°C | | **Mounting Type** | Through-Hole (THT) | --- ### 2. Electronic Core Features * **Current Compensation:** The dual-winding structure allows the magnetic fields generated by the supply and return currents to cancel each other out. This prevents core saturation under high load currents while providing high impedance to common-mode noise. * **Toroidal Core Material:** Typically uses high-permeability Manganese-Zinc (MnZn) ferrite. This material is optimized for attenuating low-to-medium frequency interference. * **Low Parasitic Capacitance:** The "R/Q" variants often feature specific winding techniques (like sectional winding) to reduce stray capacitance, extending the effective filtering range to higher frequencies. --- ### 3. Application Areas The **LTCEC-115D** series is commonly found in the following stages of electronic design: 1. **AC/DC Power Supplies:** Placed at the input stage (EMI Filter) to prevent noise from the switching regulator from leaking back into the power grid. 2. **LED Drivers:** Used to meet regulatory standards (like CISPR or FCC) regarding conducted emissions. 3. **Industrial Automation:** Protects sensitive sensors and control logic from industrial electrical noise. --- ### 4. Circuit Diagram Representation In a schematic, this part is represented as two coupled inductors on a single core: ```text L1 (Line) o----(UUU)----o (Core) L2 (Neutral) o----(UUU)----o ``` ---