Hi,
I would control the UCC27518A gate driver with a 3V3 MCU, can I use EN pin (for 3V3 PWM) and pull down -IN ?
Thanks in advance
Hello Giovanni,
You mean to use a configuration like this where you drive using the enable pin?
That is a pretty normal thing to do; it is even in the datasheet. The only two things to watch out for are the slightly different propagation delays from IN to out and EN to out (probably too small to matter here), and the floating conditions.
EN is pulled up internally. This means that if you stop driving enable, it will pull up and turn on the output. This could be bad in some conditions, so keep this in mind. I'm referring to this condition in the truth table:
So to summarize, it should be fine to do this. Just be careful of the edge cases/leaving things floating on startup/shutdown.
Thanks,
Alex M.
