This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UCC28950 主机配置時 SYNC腳要接哪里?

Other Parts Discussed in Thread: UCC28950

UCC28950 主机配置時 SYNC腳要接哪里?

用UCC28950做全橋移相DC-DC變換器,用12V外置電源給IC供電,測量1腳有5V輸出,測量22腳OUTA沒有方波輸出。這時需要用手摸下SYNC腳OUTA-D才會有方波輸出。

試過把SYNC腳接低電位和RT腳,輸入12V電壓給IC后OUTA-D都沒有輸出。

現在SYNC腳悬空 外置12V電源提電給IC,輸入400VDC后還是沒有輸出。