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TPS54627: About TPS54627 and TPS54427 overvoltage.

watanabe
Expert 1740 points
Part Number: TPS54627
Other Parts Discussed in Thread: TPS54427,

Hi,

My customer has a question about TPS54627 and TPS54427 overvoltage.

TPS54627 · · with OVP
TPS54427 ··· without OVP

Although the above IC is used for 5 V -> 3.3 V,
If the output line of the IC is 5 V or 24 V
Does rupture, smoke emission, ignition etc occur?

Best regards,

Watanabe

  • 0
    TI__Mastermind 18510 points
    Hi
    For these two parts, they all work at DCP2 mode.
    Based on detecting Vout, the IC will turn on High-side mosfet until VFB(KVout) hit Vref, and if Vout is a higher voltage, VFB is always higher than Vref, IC will not turn on H-MOS, so actually, this mode can get the chip protected by the loop control when a higher Vout voltage is generated by the converter.
    BUT if you force to add a big voltage at Vout on purpose, if the Voltage at pins is higher than the value in AMR table 6.1, the IC will damage, this should be general.

    BR,
    Yuchang