1.Capacitor voltage-proof (WV)
In order to match the signal voltage output by the power amplifier, the withstand voltage value of the capacitor is usually higher than the output signal voltage designed by the power amplifier. The 100VDC marked on the capacitor should usually be able to withstand not less than 1.6 times the pulse voltage (such as 100V*1.6=160V). Therefore, the matching with the power amplifier must be calculated accurately. Another is the selection of materials. Too poor materials or insufficient pressure resistance will cause heat and combustion, leading to accidents.
2.Dissipation factor of capacitor
The capacitor voltage-proof level, its own material and dissipation factor are related. The lower the dissipation factor of the capacitor, the greater the power it can bear, and the higher the dissipation factor, the smaller the carrying power. Dissipation factor is also referred to as DF, the angle between the phase angle of the signal passing through the capacitor and -90 degrees is called dissipation factor . The phase angle of a standard capacitor is negative 90 degrees (the dissipation factor is zero, ESR The impedance value is also zero), and the lower the DF value, the lower the ESR impedance value. For example, the phase angle of a standard capacitor for signal transmission is negative 90 degrees, so the closer the phase angle of the capacitor is to -90 degrees, the lower the dissipation factor value, and therefore the greater the power assumed. If a standard capacitor is assumed. Since its phase is -90 degrees, that is to say, the dissipation factor value is zero, and the ESR impedance value is also zero (for DF, it is impossible to achieve zero in the actual manufacturing process).
The dissipation factor value is proportional to the capacitor’s grade series internal resistance (ESR). The lower the dissipation factor value, the lower the internal resistance value. The higher the dissipation factor value, the higher the internal resistance value. Sound quality and dissipation factor value The level is inversely proportional, the lower the dissipation factor value, the lower the internal resistance value, so the better the sound quality, the higher the dissipation factor value, the higher the internal resistance value, so the sound quality is worse.
Post time: Oct-29-2020