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UCC28C45 Switching Frequency

John Benner
Prodigy 90 points
Other Parts Discussed in Thread: UCC28C45

I am using the UCC28C45 but am not getting the expected switching frequency as detailed in Figure 6 of the datasheet.  Is this figure correct or are there any other concerns that could effect the frequency?

  • 0
    Prodigy 70 points

    In the figure 6 give you the oscillator frequency, which is fixed by the couple RT,CT. But if you see in the data sheet page 1, the flip flop (block T) affects the frequency output. In your case the UCC28C45 gives the one-half of the oscillator output, so if you are founding that the frequency output is half of the what you are expecting than your are setting the right frequency.

    Regards,
    Rachid