Several parameters of Schottky diode — SUNMATE

Schottky diodes are often used in switching power supply, frequency converter, drive circuit and other fields. In different application scenarios, the main factors to be considered are also different, and need to be considered comprehensively according to specific application scenarios. The main parameters to be considered are as follows:

A Conduction voltage drop VF: the voltage drop at both ends of the Schottky diode when it is conducting forward. The greater the current flowing through the diode, the greater the conduction voltage drop at both ends of the diode, and the greater the heating capacity of the components.

B Reverse saturated leakage current IR: when the reverse voltage is applied at both ends of the Schottky diode, the reverse leakage current of the Schottky diode is relatively large when the current flowing through the diode.

C Rated current IF: the average current value converted according to the normal operating temperature when the Schottky diode works normally for a long time.

D Maximum surge current IFSM: the maximum forward current allowed to flow through the Schottky diode. Since the current is instantaneous, this value is large.

E Maximum reverse peak voltage VRM: the maximum reverse voltage that can be applied when Schottky diode is broken down by high voltage. This voltage is not an instantaneous voltage, but a repeated positive and negative voltage.

F Maximum DC reverse voltage VR: the maximum reverse voltage that can be applied when the Schottky diode is broken down by high voltage. This voltage is a continuous voltage and is used in DC circuit.

G Maximum operating frequency fM: due to the limitation of the PN junction operating principle of Schottky diode, when it exceeds a certain operating frequency, its single conductivity will become very poor, which is the maximum operating frequency.