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User17756
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Hey all,
is it mandatory to use -5V during turn-off? Can 0 V be used?
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YUAN
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First like received 10 replies posted 5 solutions authored
I believe you are asking the gate voltage window.

For the gate voltage, please follow the application note. 0V is recommend for the discrete devices.

https://www.infineon.com/dgdl/Infineon-Guidelines_for_CoolSiC_MOSFET_gate_drive_voltage_window-Appli...

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YUAN
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First like received 10 replies posted 5 solutions authored
I believe you are asking the gate voltage window.

For the gate voltage, please follow the application note. 0V is recommend for the discrete devices.

https://www.infineon.com/dgdl/Infineon-Guidelines_for_CoolSiC_MOSFET_gate_drive_voltage_window-Appli...
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electricuwe
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Also for the Easy modules 0 V can be used in case simplicity of the design has priority vs. switching speed. With a higher turn-on gate resistor the dV/dt can be reduced to a level that also modules - inspite of their longer internal and external gate connections - can be operated with 0 V. In some applications - like drives - dV/dt needs to be limited anyhow to avoid adverse effects on the machine windings and bearings.
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Fränce
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5 sign-ins 5 replies posted 10 questions asked
YUAN wrote:
I believe you are asking the gate voltage window.

For the gate voltage, please follow the application note. 0V is recommend for the discrete devices.

https://www.infineon.com/dgdl/Infineon-Guidelines_for_CoolSiC_MOSFET_gate_drive_voltage_window-Appli...


Dear YUAN,
I had a look at the application note AN2018-09 and i am not sure if the the IMZ120R030M1H is able to operate with a gate voltage of +18/-5. Is it safe to operate the device for a reasonable amount of time?
Could you please clarify?
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YUAN
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It really depending on the what is the reasonable time and the switching frequency. In the appnote, we translate the total switching events into a nominalized switching frequency. Please calculate the total switching events in your application, if your switching fsw * total designed operation time is smaller than 10k*10*365*24*3600, then 18/-5V(including undershoot) is OK. However, CoolSiC MOSFET is very robust against parasitic turn-on effects, we do not see the reason to have such low turn-off voltage.
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