PA2755NL

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Common Mode Chokes

The PA2755NL is an example of a common mode choke, commonly used to suppress common-mode noise in electronic circuits. It consists of two identical inductors mounted onto a single ferrite core, with each end of each inductor connected to one end of its neighbour. The winding ratios are carefully designed so that the current flowing in one inductor is suppressed, while the current flowing in the other inductor is unaffected.

Common mode chokes are used to reduce electromagnetic interference from higher frequency noise sources, such as radio transmitters, computers, and motor controls. They are also used to prevent interfering signals from reaching other parts of the circuit. Common-mode chokes are especially useful in switching power supplies, since they can reduce voltage spikes caused by interrupting the power supply.

The PA2755NL offers enhanced suppression of higher frequencies (up to 1GHz) compared to standard inductors. It also provides higher stability over wide temperature ranges (up to 175°C). The device includes an integrated shield for added coil protection against EMI and magnetic interference. It has been designed to reduce external noise interference in a wide range of applications, such as telecommunications, consumer electronics, power supplies, and automotive systems.

In terms of its working principle, the PA2755NL has two main components: a ferrite core and two separate inductor windings. The ferrite core material provides a magnetic path for the electric current flowing in both windings. Each winding produces a magnetic field that is 180 degrees out of phase with the other, thus creating an electromagnetic interference cancellation effect. This helps to substantially reduce the effects of common-mode noise.

The main advantage of using a common mode choke such as the PA2755NL is that it is relatively inexpensive and easy to install. It is also effective in reducing EMI and other potential sources of interference. Because they do not require a large physical size to achieve good filtering, they are ideal for applications where a small and compact design is needed.

Common mode chokes such as the PA2755NL are found in a wide variety of applications, including high speed cable and wireless communication, motor control, and power supply systems. They are essential components in ensuring reliable operation in environments where electromagnetic interference and other forms of noise are present. As such, they play a key role in the successful functioning of many devices.

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