What are the selection and usage methods of fast recovery diodes

What are the selection and usage methods of fast recovery diodes

How is the fast recovery diode selected? How should it be used in circuit applications?

fast recovery diodes are widely used in uninterruptible power supply, switching power supply, AC motor frequency converter, pulse width modulator, color TV and other circuits, and can be used as high-frequency diode, high-voltage diode, large current rectifier diode and Flyback diode. The specific selection of parameters for fast recovery diodes should depend on the specific requirements of the circuit.

When selecting, if the single transistor fast recovery diode cannot meet the requirements and the pair transistor can meet the circuit requirements, it is recommended to use the pair transistor as a single transistor; And when used, the two fast recovery diodes in the diode are damaged, and can also be used as single diode fast recovery diodes. Depending on the manufacturing process, some models of single diode fast recovery diodes have 3 pins, with the middle pin being an empty pin, which can be determined by measurement.