Hello,
I'm having some issues making our SMPS to start up fully. It seems that it passes the 3 exploratory pulses and starts up and eventually latches up as time progresses.
Please see the schematic, layout and some waveforms. I can also provide more detailed waveforms on request if it would help debugging the problem more.
YELLOW --> Vdrv
GREEN ---> Vdd
YELLOW ---> Vaux
GREEN ---- Vdrv
Please let me know any additional info you might need to help me debug this issue. As you can see it works for a little while and then stops and starts latching again at a very weird frequency until it latches up.
Thank you