Part Number:DRV8703-Q1EVM
Hi Team,
As I was working with the DRV8703-Q1EVM, the sense amplifier output showed a large spike a few microseconds after the PWM goes high. I was able to remove this spike by disconnecting R37, which is the connection from the amplifier output on the DRV8703-Q1 to the MSP430.
Could you please explain why this spike exists and why it goes away with the removal of R37?
See below for an oscilloscope plot with R37 installed first:
(note the large spike does not line up with a current spike.)
See below for a correct plot once R37 was removed:
(note the spike here lines up with the current spike as expected)
Thanks!
Reed Kaczmarek
Analog Field Applications