CM9900-684

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Common Mode Chokes are one of the basic elements found in a variety of electrical and electronic systems. Although they are often used as inductors, they are generally used to suppress noise and remove certain frequencies from a power line. The CM9900-684 is a common mode choke designed to provide high-performance suppression of electromagnetic interference (EMI) over a wide frequency range. This article will explain the application field and working principle of the CM9900-684.

The CM9900-684 is a multi-stage common mode choke specifically designed for the power supply, signal and audio/video applications. The device has two sets of windings, a 100∅ winding and a 90∅ winding on ferrite core. It provides an effective solution for noise attenuation on cables and connectors. The choke’s high bandwidth and high-current capability make it suitable for use in several applications, such as personal computers, office equipment, medical equipment, home entertainment systems, automotive audio systems, and consumer electronics.

In terms of working principle, the CM9900-684 is composed of two windings surrounding a ferrite core. These windings act as two separate inductors, with the magnetic fields generated by each winding combining to provide a common-mode inductance. The high common-mode inductance value reduces the transfer of noise signals and other common-mode noise sources between the power ground and the signal side. By providing a high-current path for the common-mode noise signals, the CM9900-684 absorbs and dissipates these signals before they can cause interference with other electronics.

One of the main advantages of the CM9900-684 is its high operating frequency range. It can provide effective noise suppression across a range of 1MHz to 30MHz, making it suitable for a wide variety of applications. The device can also operate at up to 10A peak current, making it suitable for high-power circuitry. In addition, the device provides a high impedance of up to 2000 ohms at 1MHz, helping to reduce the potential of noise signals being transferred between power supplies or other sensitive circuit elements. The choke also features a low DC resistance value of 0.48 ohms, making it ideal for power-supply applications where power loss needs to be minimized.

The CM9900-684 is an effective solution for suppressing common-mode noise interference in a wide range of applications. Its two-stage design, high bandwidth, and high-current capability make it an ideal choice for a variety of applications, such as personal computers, office equipment, medical equipment, home entertainment systems, automotive audio systems, and consumer electronics. It can provide effective noise suppression across a range of 1MHz to 30MHz, and can also operate at up to 10A peak current with a low DC resistance value of 0.48 ohms.

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