Aug 12, 2021
10:57 PM
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Aug 12, 2021
10:57 PM
Hi
I was wondering if the what operating factors may affect the Qrr and Trr of Power MOSFET
Does higher VDS or IDS increase the Qrr and Trr?
Thanks
I was wondering if the what operating factors may affect the Qrr and Trr of Power MOSFET
Does higher VDS or IDS increase the Qrr and Trr?
Thanks
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1 Solution
Aug 13, 2021
12:19 AM
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Aug 13, 2021
12:19 AM
Hi,
The reverse recovery charges Qrr and the recovery time trr, are intrinsic parameters of the diode during its turn-off phase. This parameter is used to distinguish the body diode of the MOSFETs. Lower the Qrr and trr, lower the time taken for the MOSFET to completely turn OFF.
The current and voltage waveforms during turn OFF phase is as shown below,
They depend on the following parameters,
1) IF: Forward current flowing through the diode before it turns off
2) dI/dt : Slope applied to the diode and imposed by the circuit
3) Tj: Operating junction temperature of the diode
4) VR: Reverse voltage applied across the diode.
Regards,
Abhilash P
The reverse recovery charges Qrr and the recovery time trr, are intrinsic parameters of the diode during its turn-off phase. This parameter is used to distinguish the body diode of the MOSFETs. Lower the Qrr and trr, lower the time taken for the MOSFET to completely turn OFF.
The current and voltage waveforms during turn OFF phase is as shown below,
They depend on the following parameters,
1) IF: Forward current flowing through the diode before it turns off
2) dI/dt : Slope applied to the diode and imposed by the circuit
3) Tj: Operating junction temperature of the diode
4) VR: Reverse voltage applied across the diode.
Regards,
Abhilash P
3 Replies
Aug 13, 2021
12:19 AM
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Aug 13, 2021
12:19 AM
Hi,
The reverse recovery charges Qrr and the recovery time trr, are intrinsic parameters of the diode during its turn-off phase. This parameter is used to distinguish the body diode of the MOSFETs. Lower the Qrr and trr, lower the time taken for the MOSFET to completely turn OFF.
The current and voltage waveforms during turn OFF phase is as shown below,
They depend on the following parameters,
1) IF: Forward current flowing through the diode before it turns off
2) dI/dt : Slope applied to the diode and imposed by the circuit
3) Tj: Operating junction temperature of the diode
4) VR: Reverse voltage applied across the diode.
Regards,
Abhilash P
The reverse recovery charges Qrr and the recovery time trr, are intrinsic parameters of the diode during its turn-off phase. This parameter is used to distinguish the body diode of the MOSFETs. Lower the Qrr and trr, lower the time taken for the MOSFET to completely turn OFF.
The current and voltage waveforms during turn OFF phase is as shown below,
They depend on the following parameters,
1) IF: Forward current flowing through the diode before it turns off
2) dI/dt : Slope applied to the diode and imposed by the circuit
3) Tj: Operating junction temperature of the diode
4) VR: Reverse voltage applied across the diode.
Regards,
Abhilash P
Aug 15, 2021
09:49 PM
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Aug 15, 2021
09:49 PM
Hi
Thanks for the help
So it can be concluded that higher VDS or IDS does not increase my Trr and Qrr right?
Thanks
Thanks for the help
So it can be concluded that higher VDS or IDS does not increase my Trr and Qrr right?
Thanks
Aug 15, 2021
10:39 PM
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Aug 15, 2021
10:39 PM
Hi,
It does depend on IDS.
Regards,
Abhilash P
It does depend on IDS.
Regards,
Abhilash P