Sugiman
Newbie level 5
Hi,
I've been trying to design a start/stop unidirectional DC motor driver to help students (mainly junior high to high school) learn about various hardware devices (BJTs, FETs)
I successfully got the drive and brake to work up to 24V, thanks to a lot of googling and searching. But, I have a serious issue when there is high speed switching or switch "chattering" which causes a fatal breakdown of the N-channel FET, especially at the higher voltages.
I was hoping someone would know of a way to keep the great solid brake function while safeguarding the FET from being destroyed by transients? (at this point I'm assuming that's the cause, not really sure why though)
Thanks!
I've been trying to design a start/stop unidirectional DC motor driver to help students (mainly junior high to high school) learn about various hardware devices (BJTs, FETs)
I successfully got the drive and brake to work up to 24V, thanks to a lot of googling and searching. But, I have a serious issue when there is high speed switching or switch "chattering" which causes a fatal breakdown of the N-channel FET, especially at the higher voltages.
I was hoping someone would know of a way to keep the great solid brake function while safeguarding the FET from being destroyed by transients? (at this point I'm assuming that's the cause, not really sure why though)
Thanks!
