I am using below circuit for PFC. Before connecting coupled inductor's auxiliary output to the IC's Vcc, I wanted to make sure that it is coming properly or not.
So when I probed the red dot in the circuit below, it is showing 0V, doubtfully when I probed blue dot in the circuit below, Instead of pulsating DC at the point, I am observing a 312VDC, straight line. I am suspecting that may be the reason the inductor is not giving any voltage to it's auxiliary winding because there is no change in current at the primary winding. (The measurement of the voltage is done in oscilloscope).