What is a crystal diode? The basic structure, principle, classification, application, identification method, detection and selection method of crystal diodes 1

Crystal diode is a TPS54260DGQR diode made of semiconductor materials, also known as a diode or transistor. It has many advantages, such as small size, light weight, strong pressure resistance, long service life, etc., so it is widely used in electronic devices.

1、 Basic structure:

Crystal diodes are composed of P-type semiconductors and N-type semiconductors. The electron concentration of P-type semiconductors is higher than the hole concentration, diode  while the electron concentration of N-type semiconductors is higher than the hole concentration. Two semiconductors are connected through a P-N junction to form a junction capacitor. When an external voltage is applied on both sides of the junction capacitor, an electric field is formed on both sides of the junction capacitor.

2、 Working principle:

The working principle of crystal diodes is based on the characteristics of PN junctions. When the PN junction is in forward bias, that is, the P terminal is connected to a positive voltage and the N terminal is connected to a negative voltage, electrons flow from the N terminal to the P terminal, and holes flow from the P terminal to the N terminal, forming a current. When the PN junction is in reverse bias, that is, the P terminal is connected to a negative voltage and the N terminal is connected to a positive voltage, electrons and holes will be attracted by the electric field and cannot flow, forming a small reverse current.diode