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TPS65917-Q1: How does the TPS65917-Q1 set to fail-safe in case of VRTC?

Hayashi
Expert 1840 points
Part Number: TPS65917-Q1

Hi teams,

My customer wants to use TDA3x as be pair of PMIC TPS65917-Q1.
So, would you let me know the follow question?

What is it meaning of fail-safe and how to setting?

The "Voltage on VRTC digital input pins" in Recommended Operating Conditions of datasheet has two case about fail-safe.
However, it don't descript about the fail-safe in datasheet.

If there's anything you are unclear on, please contact me.

Best regards,
Hayashi

  • 0
    TI__Expert 8730 points
    Hi,

    I have assigned your request to responsible Applications Engineer and we will get back to you as soon as possible.

    Regards,

    Murthy
  • 0
    TI__Genius 16030 points
    Hello Hayashi-san,

    Fail-safe is just a description of the voltage input levels for a pin. A VRTC digital input pin that is not fail-safe has a maximum recommended operating voltage of 1.85V. VRTC digital input pins with fail-safe have a maximum recommended operating voltage of 5.25V.

    This means that pins which are called fail-safe can support 5V signals, even if they are on VRTC or VIO logicl level. See Table 3-1 to see which pins are fail-safe and which are not. There is no configuration here, the pins are either always fail-safe or never fail-safe, depending on the pin.

    Regards,
    Karl
  • 0 in reply to Karl Wallinger
    Expert 1840 points
    Karl san
    Thank you for your reply.

    In other word, the Fail-safe is the range of voltage?
    Example, it is the range of "VRTC fail-safe" as 5.25V for the pin of GPIO_0/1/3/5, the range of "VRTC" as 1.85V for the pin of BOOT, GPIO6, SYNCCLKOUT.

    Would you teach if there is a difference in the contents?

    Best regards.
    Hayashi