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UCC28782: Minimum and Maximum Switching Frequency

Art Mecina
Genius 16655 points
Part Number: UCC28782

Hello Guys,

What is the minimum to maximum switching frequency of UCC28782? it' doesn't seem to be described in the datasheet.

Thanks in advance!

Art

  • 0
    TI__Expert 7080 points

    Hi Art,

    UCC28782 is not a fixed frequency controller, It operates at transition mode.  The minimum switching frequency happens at lowest input voltage and full load. since the controller has burst mode controller . the maximum frequency happens at minimum Vcst threshold ~0.15V . In a word , the switching frequency is decided by bulk voltage , transformer inductance and output load condition. the switching frequency can be changed by adjusting transformer inductance .

    Thanks.