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TPS629210: Under voltage lockout adjustable?

Nathan Zuber
Prodigy 20 points
Part Number: TPS629210

The parametric search on TI's website indicates that the TPS629210 has a settable UVLO.  However, there is nothing said specifically about it in the datasheet or the EVM users guide.  There is a UVLO threshold listed in the parameters with the note "Vin rising", which sort of indicates that UVLO is not adjustable and is triggered by Vin, as does Table 8-3 in the datasheet.   The only thing that indicates a settable ULVO is the recommended layout figure 11-1, which has a resistor divider on the EN pin.

Is the UVLO on this device settable by a resistor divider on the enable pin?

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    TI__Expert 8100 points

    Hi Nathan,

    My colleague will give you reply later!

    BRs

    Zixu

  • +1 in reply to Zixu Wang
    TI__Mastermind 47410 points

    Hi Nathan,

    TPS629210 UVLO is for input voltage and not settable. That means the device is fully operational for input voltage above the rising UVLO threshold and turns off if the input voltage trips below the threshold for a falling supply voltage. However, the precise enable input allows the use of a user-programmable undervoltage lockout by adding a resistor divider to the input of the EN pin. Please refer to EVM user's guide schematic, the resistor divider R4/R5 can be adjusted to set a user's selectable input voltage at which the device turns on. The R4(549k) and R5(100k) sets around 6.5V rising (start up) and 5.85V falling (shutdown) input voltage.

    Hope this helps,

    Thanks,

    Nancy