Apr 09, 2020
10:42 AM
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Apr 09, 2020
10:42 AM
I am testing a single half of an H-Bridge with a light inductive load. I am using an IRF2007s driver for this.
While testing the low side with a lamp which draws 3 Amps at 12V, I observe the following.
Blue - Phase - line
Yellow- Gate pulse (15V)
Complete pulse
Turn_off
Turn_on
I am not sure why the last phase of the turn on takes so long. Am I driving it wrong or is it a characteristic of the MOSFET.
While testing the low side with a lamp which draws 3 Amps at 12V, I observe the following.
Blue - Phase - line
Yellow- Gate pulse (15V)
Complete pulse
Turn_off
Turn_on
I am not sure why the last phase of the turn on takes so long. Am I driving it wrong or is it a characteristic of the MOSFET.
Solved! Go to Solution.
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1 Solution
Feb 07, 2022
11:38 PM
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Feb 07, 2022
11:38 PM
Hello Sujoy,
Thank you for posting on Infineon Community.
The problem you are facing is similar to this image. The turn-on delay is due to turn on at a low current.
The capacitor charge during turn on due to charge carriers at a low current value creates this delay. If you switch at a high current value, the delay will be less.
Regards,
Anshika
2 Replies
Jun 14, 2020
12:33 PM
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Jun 14, 2020
12:33 PM
The Gate resistors are much to high, try a few Ohms and remove Diode + 2. resistor.
You have to get 56µC in and out of the gate fast.
You have to get 56µC in and out of the gate fast.
Feb 07, 2022
11:38 PM
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Feb 07, 2022
11:38 PM
Hello Sujoy,
Thank you for posting on Infineon Community.
The problem you are facing is similar to this image. The turn-on delay is due to turn on at a low current.
The capacitor charge during turn on due to charge carriers at a low current value creates this delay. If you switch at a high current value, the delay will be less.
Regards,
Anshika