1、 Fast recovery diode
Fast recovery diode, referred to as FRD, is a kind of semiconductor diode with good switching characteristics and short reverse recovery time. It has single conductivity like ordinary diode. It is mainly used in switching power supply, pulse width modulator, frequency converter and other electronic circuits. It is mainly used as high-frequency rectifier diode, freewheeling diode or damping diode.
2、 Schottky diode
Schottky diode, or SBD for short, is not made on the principle of PN junction. It is a kind of semiconductor device with metal as the positive electrode and n-type semiconductor as the negative electrode. It is a kind of hot carrier diode. Schottky diode is mainly used as rectifying diode, freewheeling diode, current source diode, current source diode in the circuit Protection diode, mainly used in low voltage, high current circuit, such as switching power supply, inverter, microwave communication
3、 Characteristics of fast recovery diode and Schottky diode
1. The reverse recovery time of fast recovery diode is hundreds of nanoseconds, but Schottky diode is faster than it, even several nanoseconds;
2. The reverse breakdown voltage of fast recovery diodes is high, generally higher than 200V, even several kilovolts, while the reverse breakdown voltage of Schottky diodes is very low, generally below 100, and some will be higher;
3. Fast recovery diodes have high power consumption, while Schottky diodes have short reverse recovery time, low loss and low noise.
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