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UCC35705: Switching frequency

Neil Peers
Prodigy 10 points
Part Number: UCC35705

The datasheet states that the device is a voltage mode 4MHz PWM controller but the oscillator is only spec'd to 1MHz.

Where does the 4MHz come from?

Thanks 

  • +1
    TI__Expert 7900 points

    Hi Neil,

    As advertised, the device oscillator can support up to 4 MHz.  The parts are characterized in production at only a single frequency, 1 MHz, according to the test conditions (RT=47k, Rdisch=400k, CT=220pF).

    Switching frequency formulas are in the Functional Description.

    Eric