Other Parts Discussed in Thread: DRV8301
Hi, I am back to this forum again..
I had a working board in previous design, but after some design changes I am having a new issue.
This is what I used to have before(previous design):
so I know that my waveform should look like this as I haven't changed any of the components. The only difference is the layout.
This is my current waveform. You can see that my Switching phase is constantly changing the frequency and there is a weird spikes every pulses.
Switching Phase:
5V-Rail:
I thought I improved the design by changing the ground scheme. Is there anything I did wrong?
The Switching ground and 5V ground are islands and the ground only connects to DRV8301 pad-ground through one internal layer.
Please see below pictures and advise:
Top:
Internal 1:
Thanks and your help is much appreciated!
SJ
