Part Number:UCC256304
I'm looking for a bit of help troubleshooting a new UCC256304 dc-dc design that will not keep RVCC on and the converter will not run.
VCC comes up, and at the VCCStartSwitching point, RVCC comes up, but goes away immediately. The high-side and low-side gate signals appear for a short time (about 7 ms), but turn off. Oscilloscope traces follow:
What might cause RVCC to immediately turn off?