Hello,
For school I have to drive a mosfet with a PWM signal to powered a little motor in 12V (MCC).
My problem is : what voltage I should apply on my mosfet and what parameter I have to take care of to have the better performance in speed.
I found a first document. I explains how to design high speed circuit :
https://www.electro-tech-online.com/custompdfs/2012/12/slup169.pdf
In the document I found this :
View attachment 69149
It explains the differents steps of the rise time.
I tried to find the equations to calculate the different time of the differents steps of the diagram.
During step 1 and 2 the capacitor Cgs is charging. I have a RC circuit with Rgate and Cgs so I should be able to calculte the time of step 1 and 2 (Am I right ?)
But I am stuck at step 3, I'm not sure how to calculate the time.
I found a second document. This one gave me the equation but with no explanation (see page 6):
https://www.electro-tech-online.com/custompdfs/2012/12/pwrt1208.pdf
So, if you have an idea or a document about how to find back the equation, thank you
For school I have to drive a mosfet with a PWM signal to powered a little motor in 12V (MCC).
My problem is : what voltage I should apply on my mosfet and what parameter I have to take care of to have the better performance in speed.
I found a first document. I explains how to design high speed circuit :
https://www.electro-tech-online.com/custompdfs/2012/12/slup169.pdf
In the document I found this :
View attachment 69149
It explains the differents steps of the rise time.
I tried to find the equations to calculate the different time of the differents steps of the diagram.
During step 1 and 2 the capacitor Cgs is charging. I have a RC circuit with Rgate and Cgs so I should be able to calculte the time of step 1 and 2 (Am I right ?)
But I am stuck at step 3, I'm not sure how to calculate the time.
I found a second document. This one gave me the equation but with no explanation (see page 6):
https://www.electro-tech-online.com/custompdfs/2012/12/pwrt1208.pdf
So, if you have an idea or a document about how to find back the equation, thank you