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TPS552882-Q1: Restart EN when PG is low time duration recommendation

Roy Chou1
Genius 16190 points
Part Number: TPS552882-Q1

Tool/software:

Hi Team,

We would like to add external circuit to let EN restart if PG goes low. Do you have recommendations for x/y/z?

For y, it should be PG delay + rise time, do we have the spec for it?


Regards,

Roy

  • 0
    TI__Genius 17570 points

    Hi Roy,

    There's a problem that if EN is low, the PG function is also not active so PG signal is invalid. What is your pull-up voltage source for PG?

    Recommend z>10ms, x>100ms. Notice that during EN low state, PG signal is invalid so even if it goes high or low, it represents nothing.

    y is dependent on when Vout rises 95% of the setting output voltage. We don't have spec on this. This time should be near soft start time, which is typically 4ms.