CoolSiC about drive method

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Mac_Kurosawa
Level 4
Level 4
Distributor - Macnica (Japan)
10 solutions authored 5 solutions authored 10 replies posted

Some SiC-MOSFETs require a negative gate voltage to achieve their optimal performance. However, can Infineon's SiC-MOSFETs operate without pulling the gate to the negative side, similar to conventional Si-MOSFETs?

• IGBT-compatible driving voltage (15V for turn-on)
• 0 V turn-off gate voltage

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Dipti_Kiran
Moderator
Moderator
Moderator
50 solutions authored 100 replies posted 250 sign-ins

Hi @Mac_Kurosawa ,

Yes, we can drive Infineon SiC MOSFET at 0V turn off gate voltage. Though the negative voltage driving reduces the switching energy and improves the efficiency but driving circuit with negative voltage is more complex than the circuit without negative voltage and driving SiC at Vgs= -5 V turn off also causes significant Vgs(th) drift.

Regards,

Dipti

 

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Dipti_Kiran
Moderator
Moderator
Moderator
50 solutions authored 100 replies posted 250 sign-ins

Hi @Mac_Kurosawa ,

Yes, we can drive Infineon SiC MOSFET at 0V turn off gate voltage. Though the negative voltage driving reduces the switching energy and improves the efficiency but driving circuit with negative voltage is more complex than the circuit without negative voltage and driving SiC at Vgs= -5 V turn off also causes significant Vgs(th) drift.

Regards,

Dipti

 

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