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## Calculation of maximum switching frequency for SiC Schotty Barrier Diodes

Level 1
Level 1

Hello everyone!

I would like to know if there is a way to calculate the maximum switching frequency for SiC SBDs, based on the data provided in the datasheet? The goal is not to have a value for a precise operating point, but to make a performance comparison between different diode references.

1 Solution

## Re: Calculation of maximum switching frequency for SiC Schotty Barrier Diodes

Moderator
Moderator

Hello,
For SiC Schottky Diode, junction capacitance is the frequency limiting parameter. As the frequency increases, the capacitance impedance decreases and the displacement current increases significantly, but this may take place in MHz frequency range for AC rectification.
For converter applications in kHz frequency range, the parameter that may cause the failure of the device, even if the pulse voltages are significantly lower than the static block voltages, is stippness (dv / dt) of the voltage transients. This parameter is mentioned in the Datasheet.

Please go through the references for more details,
1. Infineon white papers
2
. "Evaluation of High Frequency Switching Capability of SiC
Schottky Barrier Diode, Based on Junction Capacitance Model"

Best regards,
Vicky S

4 Replies

## Re: Calculation of maximum switching frequency for SiC Schotty Barrier Diodes

Moderator
Moderator

Hello,
We are looking at your query and will get back to you soon.

Best regards,
Vicky S

## Re: Calculation of maximum switching frequency for SiC Schotty Barrier Diodes

Moderator
Moderator

Hello,
For SiC Schottky Diode, junction capacitance is the frequency limiting parameter. As the frequency increases, the capacitance impedance decreases and the displacement current increases significantly, but this may take place in MHz frequency range for AC rectification.
For converter applications in kHz frequency range, the parameter that may cause the failure of the device, even if the pulse voltages are significantly lower than the static block voltages, is stippness (dv / dt) of the voltage transients. This parameter is mentioned in the Datasheet.

Please go through the references for more details,
1. Infineon white papers
2
. "Evaluation of High Frequency Switching Capability of SiC
Schottky Barrier Diode, Based on Junction Capacitance Model"

Best regards,
Vicky S

## Re: Calculation of maximum switching frequency for SiC Schotty Barrier Diodes

Level 1
Level 1

Hello Vicky,

Thank you for your response.

Best regards,
Valentin

## Re: Calculation of maximum switching frequency for SiC Schotty Barrier Diodes

Moderator
Moderator

Hello Valentine,