TIDUF59 March 2024
The PFC stage was measured at 140W full load condition. The waveform of VDS and ZCD/CS pin was captured close to UCC28056 to confirm the operation of the PFC controller and TI-GaN.
The channel setting of Figure 3-7 to Figure 3-12 is:
When the output voltage of the PFC is lower, the duty cycle and the operation frequency are lower.