I've been working on a BLDC control circuit for my senior year project. Recently I confronted a problem and couldn't solve it after days of googling which is quite frustrating for me. Here are some details.
I use IR2130 mosfet driver -controlled by an arduino- for 3 phase H bridge.
High side PWM signals can reach 90% max duty cycle.
I use IRL540 Logic mosfets which have 16v Vgs voltage. (I have 12v rectifier)
My questions (problems) are:
1- My arduino generated input signals are fine but IR2130 doesn't generate High and Low side mosfet signals.
2- I grounded both arduino and circuit on the same GND still no effect on it. Is it necessary?
3- I suppose Vso pin is necessary to discharge Mosfets. So I grounded it using a small resistence. Am I doing right?
4- Even if I messed up the bootstrapping, shouldn't low side mosfets work just fine?
Any help would be appreciated. Thank you!!!