LF1290NP-471

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Common Mode Chokes are having an increased importance in modern applications that generate and process high frequency signals. They are used to reduce the common mode voltage component of a signal, as well as to reduce the EMI/RFI emissions. The LF1290NP-471 application field and working principle is the focus of this article.

The LF1290NP-471 is an effective device for common mode noise suppression. Unlike other common mode filters, it has no internal capacitance and thus requires less PCB area repairs. Its ferrite core is impregnated with non-magnetic resin. This ensures greater durability and less magnetic flux leakage, making it ideal for applications which generate signals having high electromagnetic radiation.

The LF1290NP-471 is capable of suppressing the common mode noise in a signal to levels which are below the specified safety standards for EMI/RFI. This makes the device suitable for applications in sensitive areas such as medical equipment, which often require high precision signal processing. In addition, the low profile of the LF1290NP-471 makes it ideal for integration into hand-held or space-limited applications.

The working principle of the LF1290NP-471 is based on mutual induction. The ferrite core of the device acts as a transformer with two windings, one each for the common and differential modes. Any noise in the differential mode is reduced by being induced into the common mode winding, where it is effectively suppressed. As the ratio of mutual induction between the two windings is higher than regular transformers, the LF1290NP-471 is much more effective at suppressing common mode noise than other designs.

The LF1290NP-471 has a wide range of applications which make use of its outstanding noise suppression capabilities. It is extensively used in automotive and industrial environments which require high precision. It is also commonly deployed in mobile and base station antennas to protect from the effects of strong EMI/RFI radiation. The device can also be used for the suppression of high voltage spikes and transients in power lines.

The LF1290NP-471 is an effective device for applications which require strong noise suppression. Its ferrite core provides high electromagnetic compatibility, while its two-winding transformer design ensures a high gradient of mutual induction. Its wide range of applications, including automotive, mobile, and industrial, demonstrates its versatility and reliability for noise reduction.

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