The difference between chip inductors and chip beads

SMD inductors are energy storage components, while SMD magnetic beads are energy conversion and consumption components. SMD inductors are suitable for power filter circuits and focus on suppressing conduction interference. Magnetic beads are suitable for signal circuits. There is parasitic capacitance at the end, which is caused by the ferrite body between the two electrodes of the device being equivalent to the capacitive medium. In the resonant circuit, the inductor must have high Q, narrow inductance deviation, and stable temperature coefficient in order to achieve the narrow band of the resonant circuit and low frequency temperature drift. High-Q circuits have sharp resonance peaks. The narrow inductor bias ensures that the resonance frequency deviation is as small as possible. The stable temperature coefficient ensures that the resonant frequency has stable temperature change characteristics. The difference between standard radial lead inductance and axial lead inductance and chip inductors is only in the package. Inductance structures include coils wound on dielectric materials (usually alumina ceramic materials), or air-core coils and coils wound on ferromagnetic materials. The function of the chip magnetic beads is mainly to eliminate the RF noise existing in the transmission line structure (PCB circuit). RF energy is the AC sine wave component superimposed on the DC transmission level. The DC component is the required useful signal, and the radio frequency RF energy But useless electromagnetic interference is transmitted and radiated along the line (EMI). To eliminate these unwanted signal energy, chip magnetic beads are used to play the role of high-frequency resistance (attenuator). This device allows DC signals to pass, while filtering out AC signals.