Hello, I want to design a resonant power supply with one high-power bipolar output (±25V) and one low-power unipolar output (+18V) using PLC810. I don't want to use the PFC module of the IC, so I just leave open the ISP, GATEP, VCOMP, GNDP pins, connect the FBP pin to a resistive divider. Look at the Fig. 1 and tell me if it is a correct way to obtain dynamic stability. In practice this circuit shows instability at heavy loads: 200-300 hz oscillations are generated.