function of ultra fast recovery diode?

function of ultra fast recovery diode?

With the development of electronic components, diodes are also one of them. ultra fast recovery diode (FRED) are semiconductor diodes with good switching characteristics and ultra-short reverse recovery time. They are commonly used as freewheeling, absorption, clamping, isolation, output, and input rectifiers for switching devices in high-frequency inverter devices, allowing the functions of switching devices to be fully utilized.

It is mainly used in switching power supply, PWM pulse width modulator, frequency converter and other electronic circuits as high-frequency rectifier diodes, Flyback diodes or damping diodes. The fast recovery diodes adopts gold doping and simple diffusion processes in its manufacturing process, which can achieve high switching speed and high voltage resistance. At present, fast recovery diodes are mainly used as rectifier components in inverter power supplies.

With the development of power electronics technology towards high-frequency and modularization, direct insertion ultra fast recovery has also flourished as a high-frequency device. It has been widely used in various high-frequency inverter devices and chopper speed control devices, playing a role in high-frequency rectification, continuation, absorption, isolation, and clamping. This is beneficial for the development of high-frequency inverter welding machines, high-frequency switch type electroplating power supplies, high-frequency high-efficiency switching power supplies, high-frequency fast charging power supplies in China High frequency frequency conversion devices and power factor correction devices will play a driving role.

High frequency inverter devices that are efficient, energy-saving, energy-saving, and material saving, and can improve product quality and labor productivity, will gradually replace the thyristor power supply that is currently being produced in large quantities, with large volume, low efficiency, and serious pollution to the power grid. This will play a decisive role in accelerating the new generation cycle of power electronic products in China.

When selecting a ultra fast recovery diode, the first consideration is to match the position frequency of the scheme with the device recovery time. Secondly, select a voltage resistant device model with a peak voltage greater than 30%. Finally, consider that the forward voltage drop value of the corresponding position current in the scheme is within the appropriate range of matching.

Fast recovery diodes packaging almost covers the entire series of direct insertion Ken chips: TO-220AB (iron sealed), ITO-220AB (plastic sealed), TO-247, DO-41, DO-15, DO-27, R-6, chips: SMA, SMB, SMC, SMAF, SMBF, SOD123FL, TO-277, TO-252, TO-263, and other packaging