HM28-35037LF

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Common Mode Chokes are devices used to filter differential mode currents on two identical conductors. These devices are used to prevent the emission of noise from one individual wire for the purpose of interference prevention, without significantly affecting the other wire. This article will discuss the application field and working principle of a specific type of Common Mode Choke - the HM28-35037LF.

The Application of the HM28-35037LF

The HM28-35037LF is a small form factor Common Mode Choke designed for harsh environments. They are particularly useful in applications where radio-frequency interference (RFI) and electromagnetic interference (EMI) could interfere with system performance. Typical applications include automotive, communication, industrial control, medical, security and directly connected power supply. In each of these applications, the common-mode choke helps to reduce common-mode noise and improve the interference immunity of the system.

In automotive applications, the HM28-35037LF can reduce the effects of near-field RFI and EMI on sensitive electronic systems. This can be important for the safety-critical components of a car, such as braking, airbag deployment, and acceleration systems. In communication, the common-mode chokes help to prevent interference from third-party radio transmissions, while in industrial control they act as filters for motor control systems.

Working Principle of the HM28-35037LF

The working principle of the HM28-35037LF is based on the principle of electromagnetic induction. This device works by transferring the current from the signal on one wire to the other wire, while attenuating the signal on both wires. To accomplish this, the device comprises two coils of wire, each one wrapped around a ferrite core. As the current flows through these coils, an electromagnetic field is generated. This field interacts with the other coil, transferring the current and attenuating the initial signal. In this way, both Common-mode and differential-mode emissions are suppressed.

The HM28-35037LF features an internal circuit made to optimize the performance of the device and to ensure high efficiency of the attenuation. The internal circuit implements a low-impedance circuit path between the two coils, and the internal circuit also contains capacitor elements to increase the attenuation of the device. As a result, the HM28-35037LF offers higher attenuation levels than traditional Common-mode Chokes.

Conclusion

The HM28-35037LF is a small form factor Common Mode Choke designed for harsh environments. Its application is suitable for a variety of applications, such as automotive, communication and industrial control. These devices are used to suppress the emission of noise from one individual wire for the purpose of interference prevention, without significantly affecting the other wire. The working principle of the HM28-35037LF is based on the principle of electromagnetic induction, and incorporates an internal circuit to optimize its performance.

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