What are the differences between fast recovery diodes and ordinary diodes? — SUNMATE
What are the differences between fast recovery diodes and ordinary diodes?
Fast recovery diode: the forward voltage drop is higher than that of ordinary diode (0.5-2V), and the reverse withstand voltage is mostly below 1200V.
Common diode: with forward voltage reduction (0.4-1.0V), short reverse recovery time (2-10ns nanoseconds), large reverse leakage current, low withstand voltage, generally lower than 150V, and mostly used in low-voltage occasions.
Fast recovery diode:
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, freewheeling diode or damping diode. The internal structure of the fast recovery diode is different from the ordinary PN junction diode. It belongs to the PIN junction diode, that is, the base I is added between the P-type silicon material and the N-type silicon material to form a PIN silicon chip. Because the base region is very thin and the reverse recovery charge is very small, the reverse recovery time of the fast recovery diode is short, the forward voltage drop is low, and the reverse breakdown voltage (withstand voltage value) is high.
Diode is one of the electronic components. It is a device with two electrodes, which only allows the current to flow in a single direction. Many uses use its rectification function. Varicap Diode is used as an electronic adjustable capacitor. The current directionality of most diodes is usually called "Rectifing" function. The most common function of the diode is to allow the current to pass in a single direction (called forward bias), and block it in the reverse direction (called reverse bias).