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ADP505X OVP delay time

Quamstar
on Apr 13, 2017

Hi,

i do have a question to the delay time of the ADP505X overvoltage protection. For OCP/HICCUP a value of 7x tss is given.

Is there any information about the shutdown delay if the overvoltage threshold is exceeded? Is the OVP threshold of 124% adjustable or fixed?

Is it right that the power good signal dissapear in an case of an overcurrent and/or overvoltage?


Thanks and kindly regards

Jan

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  • 0 on Apr 17, 2017 7:00 PM

    Hello!

     

    Good day. Please be noted that the latch-off protection for short-circuit and overvoltage conditions is optional and is enabled:

    • via I2C (for ADP5050 and ADP5051) or
    • by factory fuse (for ADP5050, ADP5051, ADP5052 and ADP5053).

    ADP5054 has optional latch-off protection only for short-circuit conditions.

     

    The 124% OVP threshold is fixed. A channel latches off instantaneously upon detection of any overvoltage event. No delay is present.

     

    The power-good signal, on the other hand, goes low only whenever the output voltage falls below 87.2% (typical) of the nominal value for a delay time greater than approximately 50 microseconds. Any OCP or OVP event would cause the output voltage to fall and hence make the PGOOD signal go low.

     

    Regards,

    Migs

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  • 0 on Apr 17, 2017 7:00 PM

    Hello!

     

    Good day. Please be noted that the latch-off protection for short-circuit and overvoltage conditions is optional and is enabled:

    • via I2C (for ADP5050 and ADP5051) or
    • by factory fuse (for ADP5050, ADP5051, ADP5052 and ADP5053).

    ADP5054 has optional latch-off protection only for short-circuit conditions.

     

    The 124% OVP threshold is fixed. A channel latches off instantaneously upon detection of any overvoltage event. No delay is present.

     

    The power-good signal, on the other hand, goes low only whenever the output voltage falls below 87.2% (typical) of the nominal value for a delay time greater than approximately 50 microseconds. Any OCP or OVP event would cause the output voltage to fall and hence make the PGOOD signal go low.

     

    Regards,

    Migs

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