当整流二极管用于500Hz以下的应用时,FRD用于若干kHz到100kHz的开关操作。
Fast Recovery Diodes (FRDs) have the same withstand voltage as rectifier diodes, short reverse recovery time (trr), and low reverse recovery current. Loss due to recovery current is called switching loss. Since this recovery current and reverse recovery time are almost constant, the higher the frequency, the higher the ratio of switching loss to the total loss.
It is used in applications from several kHz to 100 kHz at voltages at which Si Schottky barrier diodes (Si-SBDs) cannot be used (reverse bias applied to the diode is several tens of V or more).
It is suitable for use in switching power supplies, inverters and DC-DC converters.
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