What is the difference between ordinary silicon diodes and Schottky diodes?
Both diodes are unidirectional and can be used for rectification applications.
   The difference is that ordinary silicon diode voltage can be done higher, but its recovery speed is low, can only be used in the low frequency rectifier, if it is high frequency will not be able to quickly restore the reverse leakage occurs, and finally lead to the tube Severe heat burned; Schottky diode pressure is often low, but it is fast recovery, can be used in high frequency applications, so the switching power supply using this diode as a rectifier output, however, switching power supply on the rectifier Tube temperature is still very high.