UT2020-004

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Common Mode Chokes, also known as CM chokes, are electronic components designed to suppress common-mode signals such as voltage spikes, current surges, and noise. The UT2020-004 Application field and working principle is a type of common mode choke whose operation principle is based on single-stage induction magnetic, resulting in a more efficient suppression of common-mode signals. This type of choke is suitable for use in applications such as motor-drive circuits, power supplies, and LCD drivers.

The UT2020-004 common mode choke consists of a two-layer winding: an inner-winding and an outer-winding, both wound onto a magnetic core. Under steady-state conditions, the inner-winding produces a magnetic field that induces a voltage across the inner-winding terminals. The induced voltage across the inner-winding induces a current in the outer-winding, which induces a magnetic flux in the core.

When a common-mode voltage appears, the differential voltage across the two windings is zero. Therefore, only the magnetic field produced by the inner winding interacts with the core, creating a voltage that opposes the common-mode voltage. The resulting voltage is referred to as common mode voltage rejection (CMVR).

The UT2020-004 CM choke has high common-mode noise rejection (CMRR) of up to 200 dB, which is several orders of magnitude better than other types of chokes. In addition, it has excellent mechanical properties, such as a high mechanical strength and a low thermal resistance. The UT2020-004 CM choke can suppress noise and interference such as outside signals, power-supply-noise, and common-mode noise.

The UT2020-004 CM choke has excellent high-frequency characteristics, which result in a sharp roll-off of common-mode signals, whereas the inner-winding inductance and the outer-winding capacitance keep the common-mode signals away from the desired frequencies. This feature of the UT2020-004 CM choke makes it suitable for applications such as medical equipment, home appliances, automotive systems, and industrial systems.

The UT2020-004 CM choke is designed to prevent unwanted voltage or ground-loops from forming in a circuit by isolating different circuits from each other. This type of transmission line provides superior signal integrity, which is critical for the prevention of common-mode signal transmission. In addition, the common-mode choke also prevents common-mode noise from entering the system.

In summary, the UT2020-004 common mode choke is an effective device for suppressing common-mode signals. It provides high CMRR and excellent mechanical and electrical performance, making it suitable for a variety of applications. The UT2020-004 CM choke is an ideal solution for motor drives, power supplies, LCD drivers, and other applications requiring improved signal integrity and reduced common-mode noise.

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