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Burst Mode of UCD3138

michael
Prodigy 170 points
Other Parts Discussed in Thread: UCD3138, UCD3138PSFBEVM-027

Hi TI,

I am going to use the burst function of ucd3138 in my design, but I am not clear about its operation.

Do you have examples or related documents?

Thanks.

michael.

  • 0
    Prodigy 170 points
    Nobody answers?

    On page79 about burst mode, "In its simplest form, it disables DPWM output pulses when the filter output goes below a threshold - LoopMuxRegs.LLDISTHRESH. It reenables them when the filter goes above another threshold – LoopMuxRegs.LLENTHRESH.bit.TURN_ON_THRESH."

    I am confused why the filter output will go high after the DWPM is disabled, and why the filter will to low after the DPWM is enabled?
  • 0
    TI__Expert 4970 points

    Michael,

    Have you seen the UCD3138PSFBEVM-027? It uses burst mode at light loads.

    -Brandon