I am using UCC28700-Q1 for DC-DC converter. The designed circuit is same as per the typical application circuit mentioned in datasheet of IC (Page No.17) which is modified for DC to DC converter with Vdd= 12 V.
But while testing the circuit, the voltage at Vdd pin of the controller (with respect to ground) is continuously changing between UVLO threshold i.e. 8 to 21 Volts. ( After reaching 21 volts, it again comes back to 8 volts and starts increasing to 21 volts)
Is it the reason behind not providing switching wave?
What is the procedure for testing UCC28700-Q1 Controller separately?