What is a fast recovery diode? The basic structure, characteristics, principles, applications, installation, fault analysis, and development history of fast recovery diodes 2

Characteristics:

1. Unidirectional conductivity: A diode conducts electricity under forward bias and turns off under reverse bias.

2. Low forward voltage drop: There is only a small voltage drop when the diode is conducting.diode

3. High reverse breakdown voltage: Under reverse bias, diodes can withstand high voltages without being broken down.

4. Fast switching speed: Special types of diodes, such as Schottky diodes, can achieve very fast switching.diode

3、 Principle:

The working principle of fast recovery diodes is similar to that of ordinary pn junction diodes. Under forward bias conditions, the p-type side is connected to the positive electrode and the n-type side is connected to the negative electrode, narrowing the depletion region and allowing current to flow through the pn junction. Under reverse bias conditions, the depletion region widens and the current is blocked. The key characteristic of a fast recovery diode is its ability to quickly stop current flow after reverse bias. When the voltage polarity suddenly changes, the minority carriers stored in the pn junction need to be cleared in order to cut off the current. Fast recovery diodes accelerate this process through optimized design, achieving the goal of quickly recovering to the cutoff state.diode

4、 Application:

Fast recovery diodes are widely used in various electronic and power electronic devices due to their fast switching characteristics:

1. Switching power supply: As a rectifier device in power converters, it provides efficient energy conversion.diode