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Common Mode Chokes

Common mode chokes, also known as differential chokes, are widely used in electronic circuits to reduce or isolate common mode noise from differential mode noise. The TLF14CB4730R2 common mode choke is a specific type of differential choke manufactured by Toshiba. To understand how the TLF14CB4730R2 works, it is important to understand basic principles of common mode and differential mode noise.

Common Mode Noise

Common mode noise is noise that travels in both directions through the same conductor or signal trace. In general, common mode noise is considered to be “high frequency noise”, with frequencies ranging from approximately 10kHz to 1GHz. Common mode noise is often imposed on signal lines by electromagnetic interference from other electronic components. The TLF14CB4730R2 common mode choke is designed to reduce this type of noise.

Differential Mode Noise

Differential mode noise, on the other hand, is noise that travels in opposite directions through two conductors or signal traces. This type of noise is usually generated by the circuit itself. Differential mode noise travels through signal lines directly, so it is typically considered to be “low frequency noise”, with frequencies ranging from approximately 0Hz to 100kHz. The TLF14CB4730R2 is not designed to reduce this type of noise.

Application Field

The TLF14CB4730R2 common mode choke is a useful tool for filtering common mode noise in electronic systems. This type of choke is often used in various types of consumer and industrial electronics, such as motor control systems, audio systems, and power supplies. The choke is also commonly used in automotive systems, such as engine management systems, navigation systems, and audio systems. The device can also be used in other types of applications, such as telecommunications and security systems.

Working Principle

The TLF14CB4730R2 common mode choke works by introducing a small amount of inductance to the signal line. This inductance limits the amount of current that can flow through the signal line. The result is a reduction in the amplitude of the common mode noise on the signal line. The choke also provides isolation between the signal line and the ground, which can reduce the effects of external noise sources. The device is designed to work in a wide range of temperatures and can operate at frequencies up to 1GHz.

Conclusion

The TLF14CB4730R2 common mode choke is a useful tool for reducing common mode noise on signal lines. The device works by introducing a small amount of inductance to the signal line, which reduces the amplitude of the common mode noise. The common mode choke is commonly used in a wide range of consumer and industrial electronics, as well as automotive systems.

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