Part Number:UCC28064A
Tool/software:TINA-TI or Spice Models
Hi:
Sorry to bother you.
I have a problem that has been bothering me for a long time. My PFC circuit model with UCC28064A in simplis is always out of work after running for about 100ms. It stopped switching because the current of COMP pin goes into reverse suddenly ,causing Voltage of COMP pin goes sharply down and droped below BRST pin and the controler runs under Burst Mode. Then the output voltage drops quickly but the COMP and BRST can never work properly.
Can you lend me some advice?
