cause of overshoot and ringing

[senmeis]

Hi,

Is it correct that the overshoot and ringing of a power drive transistor (or MOSFET) are mainly caused by the stray inductance?

 

[crutschow]

Is it correct that the overshoot and ringing of a power drive transistor (or MOSFET) are mainly caused by the stray inductance?

along with the stray capacitance, which forms an LC tank circuit.

 

[danadakk]

https://www.infineon.com/dgdl/Infineon-MOSFET_CoolMOS_gate_drivce_switching_dynamics-ApplicationNotes-v01_00-EN.pdf?fileId=5546d4626f229553016fb392d5e7749f

https://inst.eecs.berkeley.edu/~ee192/sp17/files/VishaySiliconix_MOSFETBasics.pdf

The above might help.


Regards, Da.

 

[Easy peasy]

any stray inductance causes issues - e.g. leakage L in a Tx, wiring, ESL of local bus capacitors, sources of capacitance to ring with this inductance are: drain-source cap of mosfet, Tx wiring capacitance, capacitance of diodes in the output rectifying circuit - on sec side of Tx ...