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LM5176: Wide range DC-in solution inquiry

GARETH OU
Guru 11445 points
Part Number: LM5176
Other Parts Discussed in Thread: LM5060

Hi

In this case, Wide range DC-in 12V ~24V Our customer’s current solution selection: LM5176PWPR But this guest has special requirements as follows, do you have any suggestions? Added Power detect circuit When detect under voltage (<8.5V) or over voltage (>27V), Power Good signal are latched up until Power is stable.

  • 0
    TI__Guru 65470 points

    Hello Gareth,

    LM5176 has an integrated UVLO for the input voltage. It is possible to slow the reaction of this signal down by adding a capacitor at the resistor divider added to this pin.

    Overvoltage can be detected on the output which will cause the power good signal to get low, but not on the input. Which reaction shall the device show at an input voltage above 27V?

    The power good signal is low when the output voltage is not in regulation.

    Best regards,
    Brigitte

  • 0 in reply to Brigitte
    Guru 11445 points

    Hi Brigitte

    Thank you kindly reply

    I discussed with customers to add a uvlo & ovp IC (LM5060) on the input side

    Because they hope that when the input exceeds 27V, LM5167 will stop until the voltage is lower than 27V before returning to normal

    Thanks

  • 0 in reply to GARETH OU
    TI__Guru 65470 points

    Hello Gareth,

    Thank you for the information. As the LM5176 cannot do anything against a too high VIN, there is nothing integrated for this case. The customer could use a simple comparator to pull UVLO low when VIN exceeds 27V. But LM5060 will do the job as well.

    Best regards,
    Brigitte

  • +1 in reply to Brigitte
    Guru 11445 points

    Hi Brigitte

    Got it , Thanks