Part Number: UCC25661
Hello, engineer from TI. Today I used a DC power supply set to 410V as the input voltage for the LLC converter. At a 4A load, the supply was still operating in HF burst mode. When I increased the load to 5A, the waveform shown below appeared, and the power supply shut down by itself.I believe the earlier abnormal behavior is a loop issue, though it hasn’t been confirmed yet. The subsequent output voltage fluctuation and extremely severe alternating large/small resonant current waveforms lead me to suspect a layout-related problem. Have you encountered similar situations before?
