• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 83 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

UCC3895: Concern on 6.8nF CT for low Fsw

Joyce Gao
Intellectual 1300 points
Part Number: UCC3895

Hi expert,

Customer designed with UCC3895 in ~14kHz Fsw. With RT=100kohm and CT=6.8nF which is far more than CT recommended max value 880pF.

What's the risk for doing this with high CT? The discharging current may be high and do harm to internal FET, right? What else?

Thanks,

Joyce

  • 0
    TI__Mastermind 43580 points

    Hi Joyce,

    The datasheet has this warning about using a large Ct capacitor:

    Figure 11 is shown below

    The large capacitor will effectively limit the supportable power range. 

    I hope this answers your question.