Hello -
We are attempting to startup our flyback power supply but are running into issues. We are using the UCC28712 controller.
We see Vdd charge to ~ 21V and then the gate pulses 1 time. The pulse width of the gate signal is ~ 250ns. The amplitude is ~ 13V.
Vdd then discharges over ~ 20ms and the process repeats. Any thoughts on what is going on? Why does the gate signal shut off at 250ns? Why don't I see 3 pulses?
Thanks for your help!
Brett