What are the advantages of fast recovery diodes in use

What are the advantages of fast recovery diodes in use

There are many packages for fast recovery diodes, and different models have different parameters. So, compared with other ordinary diodes, what are the advantages of fast recovery diodes in use?

Fast recovery diode is a semiconductor diode with good switching characteristics and short reverse recovery time. Gold doping measures are often used in the process, and PN junction structure is used in the structure, while some use improved PIN structure. Mainly used for

In electronic circuits such as switching power supplies, PWM pulse width modulators, and frequency converters, they are used as high-frequency rectifying diodes, freewheeling diodes, or damping diodes.

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 P-type silicon material and N-type silicon material to form a PIN silicon wafer. Due to the thinness of the base region, it recovers charges in reverse

It is very small, so the reverse recovery time of the fast recovery diode is shorter, the forward voltage drop is lower, and the reverse breakdown voltage is higher. The fast recovery diode has a forward conduction voltage drop of 0.8-1.1V and a reverse recovery time of 35-85n, rapidly transitioning between conduction and cutoff

Fast conversion has increased the frequency of device usage and improved the waveform.