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TPS628511: What's difference of Efficiency curve in datasheet

Hao(SH) Zhang
Intellectual 865 points
Part Number: TPS628511

Hi team,

My customer would like to ask why there have two different efficiency curves in the datasheet?

BRs

Hao

  • 0
    TI__Genius 16780 points

    Hi Hao,

    '1' corresponds to PFM mode where MODE/SYNC pin is set low. '2' corresponds to the FPWM mode where MODE/SYNC pin is set high.

    Best regards,

    Varun

  • 0
    TI__Mastermind 31211 points

    Hello Hao,

    Thanks for reaching out to us.

    The IC can operate in two modes of operation (PWM and PFM) depending on the MODE/SYNC level. It is described in detail in Sec. 9.3.2 of the datasheet (see figure below).

    Anyway, I placed an annotation on the efficiency graph to differentiate the mode of operation of the two sets of efficiency curves.

    Best regards,

    Excel