CM2545X171B-00

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Common Mode Chokes are components used to filter out interference in electrical and electronic devices. The CM2545X171B-00 is a common mode choke manufactured by Murata Power Solutions. It operates at a rated current of 3.5 amperes. This application note provides an overview of the CM2545X171B-00, including its application fields and working principle.

Application Fields

The CM2545X171B-00 is designed primarily for filtering duties in switching supplies and power supplies. It is suitable for use in mains-operated switching power supplies as well as notebook computers, printers, copiers, and other equipment that requires input power filtering. This component can be used for suppression of charging current when charging batteries, and is typically used in conjunction with other components such as electrolytic capacitors, rectifiers, MOSFETs, and dc-dc converters. Due to its small size and high current rating, it is an ideal solution for miniature power supplies that require low-profile and high-performance filters.

Working Principle

The CM2545X171B-00 is a choke-style filter that operates on the principle of inductive impedance. It consists of an inductor coil with a ferrite core, which is connected between two terminals. When AC current is applied to the terminals, the inductor creates a magnetic field that opposes any change in current passing through it. This creates an impediment to the flow of current, which limits interference and reduces noise. The ferrite core also functions as a shield, preventing electromagnetic interference from entering or leaving the circuit.

The CM2545X171B-00 has a high self-resonance frequency, which allows it to reject high-frequency interference more effectively. It also has a high impedance ratio, allowing it to reject lower-frequency interference at the same time. The component also has a low DC resistance, which ensures minimal losses and improved efficiency. These features make the CM2545X171B-00 an effective filter component for power supplies and other commercial products.

Conclusion

The CM2545X171B-00 is a high-performance common mode choke manufactured by Murata Power Solutions. This component offers excellent filtering performance and is suitable for use in mains-operated switching power supplies, notebooks, printers, copiers, and other equipment that require input power filtering. It has a high self-resonance frequency and a high impedance ratio, allowing it to reject both high and low-frequency interference at the same time. Thanks to its small size, high current rating, and low DC resistance, the CM2545X171B-00 is an ideal solution for miniature power supplies.

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