Hi,
I'm testing TPS54160, as you can see the image below, this is the Vsw waveform, and in the red circle is the voltage spike. i'm wondering what caused the voltage spike when mosfet switching?
I think current change so quickly at the switching moment, due to U=L*di/dt, U(voltage) will have a spike. am i correct?
if you have any suggestions, feel free to tell me.
Thanks.
Best regards
Mason Liu
Hi Neal,
Thanks a lot for you answer, i have several more questions, hope you can help me.
As mentioned in the article:
"The reverse recovery effect of the diode and the slewing of the FET capacitor voltages resultin overshoot of the Control FET current. This current overshoot is absorbed by the output capacitance of the FETs, resulting in overshoot of the Switch Node voltage."
What does slewing of the FET capacitor voltages mean in this article?
And, does output capacitance of the FETs means Co in the circuit below?
Thanks.
Best regards
Mason Liu
