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MOSFET (Si/SiC) Forum Discussions

User17665
Level 1
5 questions asked First question asked First reply posted
Level 1
What gate drivers can be used for CoolSiC mosfet devices?
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User17674
Level 3
10 replies posted 5 replies posted 5 questions asked
Level 3
CoolSiC MOSFETs are fast-switching AND high-voltage devices, whose common mode transients (CMT) can reach and exceed 50 V/ns. Higher switching speed requires higher gate drive current as well as well-matched delays and accurate timing.
CoolSiC MOSFETs may need a negative gate voltage or a Miller clamp. In addition, CoolSiC MOSFETs may need faster short-circuit protection as their short-circuit withstand time is smaller than with traditional IGBTs.
In case short-circuit capability is not required, higher gate voltage may be utilized to reduce RDSon.

Furthermore you can find a table with the respective gate drivers on the web page under: https://www.infineon.com/cms/en/product/power/gate-driver-ics/galvanic-isolated-gate-driver/

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User17674
Level 3
10 replies posted 5 replies posted 5 questions asked
Level 3
CoolSiC MOSFETs are fast-switching AND high-voltage devices, whose common mode transients (CMT) can reach and exceed 50 V/ns. Higher switching speed requires higher gate drive current as well as well-matched delays and accurate timing.
CoolSiC MOSFETs may need a negative gate voltage or a Miller clamp. In addition, CoolSiC MOSFETs may need faster short-circuit protection as their short-circuit withstand time is smaller than with traditional IGBTs.
In case short-circuit capability is not required, higher gate voltage may be utilized to reduce RDSon.

Furthermore you can find a table with the respective gate drivers on the web page under: https://www.infineon.com/cms/en/product/power/gate-driver-ics/galvanic-isolated-gate-driver/
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Fränce
Moderator
Moderator 5 sign-ins 5 replies posted 10 questions asked
Moderator
Hi,
you mentioned the accurate timing in the gate driver. Why is this important?

Thanks!
Fränce
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electricuwe
Moderator
Moderator 5 sign-ins 25 replies posted 10 solutions authored
Moderator
Hi,

the accurate timing is especially important when you are using high switching frequencies. If there are to large tolerances in timing this will require large deadtime/interlock delay time, which has negative impact on the control design. Furthermore large deadtime will lead to longer body diode conduction time which has negative impact on efficiency (with both switches of a halfbridge provided with exactly matching gate signals, synchronous rectification will take place all the time).

Best regards,

electricuwe
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Olaf_Bendix
Moderator
Moderator First like received First question asked 5 sign-ins
Moderator
Hi,

the Infineon gate-driver you can find under following link: https://www.infineon.com/cms/de/product/power/gate-driver-ics/

If you scroll down a bit, you can find a big selection table. Here you can select corresponding your search options, like CooSic, Application, configuration,...

So far you click on the corresponding areas, you will find your gate-driver according to your whishes. Hope it helps
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User20209
Level 1
Level 1
thank you for sharing this. This is really helpful. party bus tampa
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