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Ferrite Beads and Chips: LI0402C221R

The LI0402C221R series of ferrite beads and chips are an efficient and cost effective solution for radio frequency signal or power supply EMI/EMC filtering. The device comprises of a ferrite body and two internal electrodes, and is particularly useful for wearable electronics applications. The capacity of the device to offer low inductance and low capacitance ensures that sensitive signals/circuits remain unaffected by the device, making it highly suitable for a variety of applications.

Application Field

The main application of the LI0402C221R surface mount EMI filter is to suppress electromagnetic interferences. This is quite a common problem with many consumer electronics, the LI0402C221R with its efficient EMI/RFI voltage regulation capabilities, ensures that the electronics devices work as intended, undisturbed by external electronic noise pollution. The device is commonly used in mobile handsets, audio system, medical testing equipment, home appliances, televisions, LCD monitors, automotive electronics , communications systems and power supplies.

Apart from its use as an effective EMI filter, the device is also used in many other applications requiring high accuracy signal transmission. Its low inductance and low capacitance properties make it an ideal choice in such applications. This includes its use in wearable electronics to filter out micro-electro-mechanical systems signals, differential pair filters, pulse and data lines, LAN cables, Wi-Fi systems, driver/PROFET circuits, and other high frequency circuits.

Working Principle

Based on its structure and components, the LI0402C221R ferrite bead and chip works on the principle of magnetic and electric fields. When the device is placed around cables or circuits, the EMI/RFI noise is intercepted by the device and purified into harmless signals, eliminating them from systems and circuits. The device works on the principle that it allows small signals and current to pass through it, while attenuating RFI noise along the lengths of the device. This ensures that sensitive circuits remain unperturbed, while receiving and transmitting signals in their purest and most efficient form.

The device also works on the principle of impedance matching. This ensures that the currents and voltages received by the system remain within the level decided by the user. The device can also reduce the amount of impedance in situations where there are higher currents due to EMIs coming from other electronic systems. The reliable performance of the device over a wide range of frequencies and temperatures makes it ideal for a large variety of applications.

Conclusion

The LI0402C221R ferrite bead and chip is a highly reliable and cost effective solution for EMI/EMC filtering of radio frequency noise. Its low inductance and low capacitance values make it ideal for various electronic applications. Its ability to work efficiently over a wide range of frequencies and temperatures make it an ideal choice for reliable EMI filtering. The device is suitable for a wide array of applications including mobile phones, audio systems, medical testing devices, power supplies, automotive electronics, differential pair filters and Wi-Fi systems.

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