Why choose several key factors of SMD magnetic beads

Source: Industry News Editor: PingShang Click: Release time: 2020-12-25 11:52:59

The key factors for choosing SMD magnetic beads

When selecting SMD magnetic beads, engineers should pay attention to several other points in addition to choosing the appropriate package volume. The first is the size of the rated current, the second is AC DCR, and the third is voltage, magnetic The frequency of the beads generally refers to the inductance at 100MHz, and a 600R magnetic beads means that the inductance at 100MHz is 600 ohms.

And suppose you choose a magnetic beads with an impedance of 50 ohms, then the suppression effect is only half. In other words, the output at the right end of the magnetic beads will probably have 150mVpp noise. Therefore, before choosing the magnetic beads, you need to have a preliminary estimate of the noise condition of the circuit (noise center frequency, amplitude, and suppressed size) and DC condition. Then select the appropriate parameters.

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