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UCC28740: UCC28740 Brown-out Protection indicate solution

Part Number: UCC28740

Hi Team,

    I found our UCC28740 have Brown-out Protection function.

    if we want to do a monitor/indicate of such Brown-out application. 

    how do we realize the indicating function? any solution we have?

  • Hello,

    The UCC28740 has input under voltage lockout.  The following application explains primary fault sensing an how it works.  Input under voltage lockout is covered in this application note.

    https://www.ti.com/lit/pdf/sluaac5

    Adjusting the input under voltage thresholds is set by the high side resistor in the VS divider (RS1).  Section 7.3.1 shows how to setup the VS divider for RS1 and RS2.

    -RS1 Sets input under voltage thresholds

    -RS2 Sets the output voltage.

    Regards,