Part Number:LAUNCHXL-F28377S
Hello,
I am driving a full bridge with the Delfino Launchpad board. I am using the ePWM pins (ePWM6A and ePWM6B) as the low and high side inputs for an arm, and they are at high state for a short moment when the board is energized. In fact, as I am pushing the reset button, those pins are always high. This results in overshoot of course. When the power cables are connected, my power supply disables the output because of the current limit when the overshoot occurs, and the processor is reset because of low voltage on power supply so the pins go high again, and overshoot occurs again and the processor is reset, this goes on like this. As a result, the processor never gets stabilized and gets locked up in a bad state.
I was wondering if this is an issue with Delfino, or just I have to use some additional logic (some logic gates on an additional board) in order to prevent high and low side inputs going high at the same moment?
Thanks,