Other Parts Discussed in Thread: UCC28180, UCC24624
Tool/software:
Hello, I'd like to ask a question. We are currently designing a 1000W AC/DC system using a structure with PFC UCC28180 + LLC UCC256604 HV startup + SR UCC24624.
Both the PFC UCC28180 and LLC UCC256604 use the LLC output AUX power supply of 12V.
If the PFC OFF of UCC256604 is connected to UCC28180
The initial startup is unsuccessful, and the PFC OFF is as shown in the diagram. The PFC is unable to operate properly.
How can the PFC OFF pin of UCC256604 be correctly connected to properly control the PFC UCC28180?
