The DLW31SN221SQ2L is a common mode choke from Murata Electronics North America. Common mode chokes are electronic components used to suppress common-mode noise in electronic circuits, while allowing differential signals to pass through with minimal attenuation. This particular choke is part of the DLW31S series.

Applications

• Suppression of common-mode noise in USB lines.
• Noise filtering in signal lines of audio equipment.
• Common mode noise suppression in differential signal transmission.
• Suppression of common mode noise from power lines.
• Noise countermeasures for LVDS, HDMI, and other high-speed differential interfaces.

Features

• Compact Size: Offers a small footprint for space-constrained applications.
• High Common Mode Impedance: Provides excellent common-mode noise suppression.
• Low Differential Mode Impedance: Ensures minimal signal degradation for differential signals.
• High Rated Current: Supports a significant amount of current without saturation.
• Wide Operating Temperature Range: Suitable for use in various environmental conditions.
• Excellent solderability Ensures robust connection to the PCB.

Benefits

• Improved Signal Integrity: Reduces noise and interference, leading to clearer and more reliable signal transmission.
• Enhanced System Performance: Minimizes the impact of noise on sensitive electronic components.
• Reduced Electromagnetic Interference (EMI): Helps to meet regulatory requirements for EMI emissions.
• Space Savings: Compact design allows for integration into smaller devices.
• Increased Reliability: Protects circuits from damage caused by noise and surges.
• Cost-Effective Noise Suppression: Provides a simple and efficient solution for common-mode noise filtering.

Specifications

While specific specifications can vary based on manufacturer, general specs for this series include:

• Inductance: 220uH
• Rated Current: 0.2A
• DC Resistance: 2.5 Ohms
• Operating Temperature Range: -40°C to +85°C
• Impedance @ 100MHz: 600 Ohms

This common mode choke is constructed using a ferrite core and wound with enameled copper wire. The core material provides high permeability, which is essential for achieving high common-mode impedance. The choke is designed for surface mount technology (SMT) and is available in various package sizes.