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TPS65266 FCC

Christian Klickow
Prodigy 740 points
Other Parts Discussed in Thread: TPS65266

Hi Team,

could you please explain the Forced Continuous Current (FCC) mode the TPS65266 uses at light loads? What happens under which conditions?

Thanks and regards,
Chris

  • 0
    TI__Guru**** 191445 points

    All that means is that the internal FETs can sink current when the load current falls below ILp-p / 2.  This is possible because the TPS65266 is a synchronous converter with both low and high side FETs.  For a non synchronous converter with a low side catch diode, the diode can only pass current in one direction, so the converter will enter DCM when the load current falls below ILp-p / 2.  Some synchronous converters use this threshold to force pulse skipping to increase light load efficiceny.  TPS65266 does not have this feature.

  • 0 in reply to JohnTucker
    Expert 1680 points

    Hello Sirs,

    May I know how I can get TPS65266 triple buck's quiescent current (PWM switching ) ?

    Datasheet only show No switching Iq .(340uA / ch )

    Many thanks !

  • 0 in reply to Terry Wu
    TI__Guru**** 191445 points
    If it is switching then it is not quiescent current any longer. That would be "no load" current. I do not think we specify that.