Fast recovery diode​ characteristics

Fast recovery diode characteristics

Fast recovery diode (FRD for short) is a semiconductor diode with good switching characteristics and short reverse recovery time. It is mainly used in switching power supply, PWM pulse width modulator, frequency converter and other electronic circuits as high-frequency rectifier diode, Flyback diode or damping diode.

The internal structure of a Fast recovery diode is different from that of a regular PN junction diode. It belongs to the PIN junction type diode, which adds a base region I between the P-type silicon material and the N-type silicon material, forming a PIN silicon wafer. Due to the thin base region and low reverse recovery charge, the Fast recovery diodee has a shorter reverse recovery time, lower forward voltage drop, and higher reverse breakdown voltage (withstand voltage).