What is the function of ultrafast recovery diode?

What is the function of ultrafast recovery diode? With the development of electronic components, diodes are also one of them. Ultra-fast recovery diode (fred for short) is a kind of semiconductor diode with good switching characteristics and short reverse recovery time. It is often used as a freewheeling, absorption, clamping, isolation, output and input rectifier for switching devices of high-frequency inverter devices, so that the functions of switching devices can be fully exerted.

Mainly used in switching power supply, PWM pulse width modulator, frequency converter and other electronic circuits, as high-frequency rectifier diodes, free-wheeling diodes or damping diodes. In the manufacturing process of fast recovery diode, gold doping, simple diffusion and other processes can be used to obtain higher switching speed and higher withstand voltage. At present, fast recovery diodes are mainly used as rectifier components in inverter power supply.

With the development of power electronics technology towards high frequency and modularization, as a kind of high-frequency device, in-line ultra-fast recovery has also developed vigorously, and now it has been widely used in various high-frequency inverter devices and chopper speed regulating devices, playing the role of high-frequency rectification, aftercurrent, absorption, isolation and clamping, which will promote the development of high-frequency inverter welding machines, high-frequency switching electroplating power supplies, high-frequency efficient switching power supplies, high-frequency fast charging power supplies, high-frequency frequency frequency frequency conversion devices and power factor correction devices in China.

High-frequency inverter with high efficiency, energy saving, electricity saving and material saving, which can improve product quality and labor productivity, will gradually replace the thyristor power frequency power supply which is being produced in large quantities, bulky, inefficient and seriously polluting the power grid, and will play a decisive role in accelerating the upgrading cycle of power electronic products in China.

When choosing the fast recovery diode, the matching between the position frequency of the scheme and the recovery time of the device should be considered first, then the model of the withstand voltage device with more than 30% peak voltage should be selected, and finally the forward voltage drop value of the position current corresponding to the scheme should be considered in the appropriate matching range.

The fast recovery diode package covers almost the whole series of direct insertion patches: TO-220AB (iron seal), ITO-220AB (plastic seal), TO-247, DO-41, DO-15, DO-27, R-6, and patches: SMA, SMB, SMC, SMAF, SMBF and SOD.