Ferrite 'Boost' Material Improves Inductor Characteristics Under DC Bias Conditions

摘要

Certain applications require a component to provide a minimum inductance to filter out unwanted pulse waveforms while passing direct current. For example, pulses created by switching transistors can be removed by an output inductor so that a clean dc output signal is obtained. The minimum inductance needed to remove the pulses can be calculated from the voltage and current waveforms (Figure 1): Inductance = Epk Dp/(Ipk- Ic).