• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 63 subscribers
  • Views 214 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

UCC28070A: Using UCC28070A without current synthesis?

Andrew Massey
Prodigy 100 points
Part Number: UCC28070A

Hi,

Can i simply use the UCC28070A without any current sense  synthesization...ie just disable it?...i appreciate the power factor wont be as good, but will it still give an output which is correct (vout)?

  • +1
    TI__Genius 11350 points

    Hi Andrew,

    Yes, if you disable the synthesizer, the PF will be quite poor but it will regulate the output.

    Ray

  • 0 in reply to Ray DiCecco
    Prodigy 100 points

    Thankyou, please could you advise what the power factor might be in such a  case?

  • 0 in reply to Andrew Massey
    TI__Genius 11350 points

    Hi Andrew,

    I don't have any data on PF with the synthesizer disabled, but it is still average current controlling so the input current wave-shape will by very poor.  You can probably use the sim tool to give you an idea of the degradation. I'm not sure why you want to disable the synthesizer.  Perhaps you'd like to substitute the synth signal with an external sense signal fed into the CSx pins? The synthesizer was provided so you didn't have to have those external components, but you can certainly do that if you chose to. In that case, you'll get PF correction as you would with other controllers which don't have the synthesizer.