Other Parts Discussed in Thread: MCF8316D
Tool/software:
I have the eval board running my motor at 70k rpm with no problem. When I transfer these same settings to my custom board the motor spins up but it stops and resets around 55k rpm.
The eval board uses PN: MCF8316C and my custom board uses MCF8316A.
I have confirmed that power is not the root cause of the issue as I am able to run the eval board using the voltage regulators off my custom board without issue.
I have monitored phase current and VM during the reset / failure event on an oscope. VM does not dip or overshoot (18V +/- 1V). The phase current on the other hand spikes right before the reset / failure occurs. I am not getting a HW_LOCK_LIMIT fault in the GUI through this event but perhaps the driver chip is self protecting without tripping the fault. DVDD does not get used. AVDD stays steady throughout the failure just like VM.
I cannot see any obvious issues myself and would appreciate some guidance in resolving.
