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Solved! Go to Solution.
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ispn:26443:1:0
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l1:144:1:0
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l2:1244:1:0
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Hello @Vaibhav
The Active clamp MOSFET should be selected based on the below parameters
1)MOSFET voltages and currents(Drain and gate) should be checked.
2)The peak current should be checked while it is turned ON. The peak current will depend on your IGBT gate
charge and gate supply voltages. The peak current can be checked in the FBSOA of your external MOSFET.
Please let me know your IGBT charge and driver supply voltage based on that we decide whether the Si2318CDS
MOSFET will fit or not for your application.
Thank you
Guru
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Hello @Vaibhav
Thanks for posting your question in the Infineon community.
1. I have selected ADJA (28K) whose Icsoff =466mA, that means the gate charge will discharge through Rg to VEE with 466mA current. Please Confirm
YES, The gate charge current will discharge through Rg to VEE with 466mA while ADJA is 28k Ohm
2. During DeSAT Fault condition, Soft off time (tCTSOOS + tCTT) will start after Tdesatout and if the soft off timeout happens then it will hard switch off through clamp pin. Please confirm.
Yes, During DeSAT Fault condition, Soft off time (tCTSOOS + tCTT) will start after Tdesatout and if the soft off timeout happens then it will hard switch (tCTT) off through clamp pin.
3. Can we reduce Soft off time (tCTSOOS + tCTT) ?
No, those cannot be reduced because those are fixed values.
Please let me know if you need any help.
Thanks
Guru
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Thank you Guru,
Is there any criteria for selection of Active clamp Mosfet? Now, I have selected Si2318CDS MOSFET.
Is it ok for 1ED3461?
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Hello @Vaibhav
The Active clamp MOSFET should be selected based on the below parameters
1)MOSFET voltages and currents(Drain and gate) should be checked.
2)The peak current should be checked while it is turned ON. The peak current will depend on your IGBT gate
charge and gate supply voltages. The peak current can be checked in the FBSOA of your external MOSFET.
Please let me know your IGBT charge and driver supply voltage based on that we decide whether the Si2318CDS
MOSFET will fit or not for your application.
Thank you
Guru
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IGBT : SEMiX305GD07E4 and Driver supply is +15V and -9V bipolar supply.
Please check and suggest
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Hello @Vaibhav
The Si2318CDS MOSFET can be used as an Active clamp MOSFET for SEMiX305GD07E4 with driver supply of Driver supply is +15V and -9V.
Thank you
Guru