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TPS552882：The same parameters of TPS552882

seven
Prodigy 20 points
Part Number: TPS552882


What is the input voltage switching threshold of buck model, buck-Boost model and boost model in TPS552882QRPMRQ1?

What is the dead time between DR1H and DR1L of the TPS552882QRPMRQ1 (no relevant value was found in the data manual), and what is the dead time of the upper and lower tubes inside the chip?

  • 0
    TI__Mastermind 28300 points

    Hi Seven,

    Take 12Vout 400kHz as an example, the Vin threshold transition from Buck to Buck-boost is about 12.4V, Buck-boost to Boost is about 11.1V. And the Vin transition from Boost to BuBo is about 11.7V, BuBo to Buck is about 13.0V.

    The dead time of DR1L and DR1H is about 10-20ns. The dead time for Boost side FETs is also about 10-20ns.

    BRs,

    Bryce

  • 0 in reply to Bryce Xun
    Prodigy 20 points

    Hi Bryce,

    We use the frequency of 2MHz, at this time, the threshold of these three modes is different from 400KHz, right? Can you give a specific threshold at 2MHz.

    and another question is, do we have a recommendation for the external MOS selection of the TPS552882?

  • 0 in reply to seven
    TI__Mastermind 28300 points

    Hi Seven,

    What is the input voltage range, output voltage and max output current?

    For 2MHz, when Vin/Vout>1.33 it will enter force Buck; when Vin/Vout<0.75 it will enter forced Boost. 

    You can refer to IPZ40N04S5L7R4ATMA1 which is used at TPS552882-2MHz EVM for external MOSFET reference.

    BRs,

    Bryce