• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 420 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TCAN4550-Q1: Recovery from Low Vsup

Shinji Tsuji
Genius 14429 points
Part Number: TCAN4550-Q1
Other Parts Discussed in Thread: TCAN4550

Hi team,

I have a question about the recovery from low Vsup input condition.

When Vsup dropped lower than UVsup and enters STNDBY state while VIO kept supplied regulated 3.3V, 

is there any action required before or after Vsup recovered to nominal voltage?

regards,

  • 0
    TI__Guru 74322 points

    Tsuji-san,

    The device's register settings will have to be reconfigured due to the device resetting once the VSUP level falls below the under voltage threshold. Was there something more specific you were referring to in terms of features or functions of the device?

    Regards,

  • 0 in reply to Eric Hackett
    TI__Genius 14429 points

    Hi Eric,

    There is no specific functions they care about, but they simply would like to know if the device will recover normally.

    In the datasheet, if the supply voltage dropped below UVsup, the device will go into standby state,

    and if the supply voltage drops further below the POR voltage, the device will shutdown completely.

    Does all the registers need to be re-loaded if the voltage drops below UVsup, but above POR threshold?

    regards,

  • 0 in reply to Shinji Tsuji
    TI__Guru 74322 points

    Tsuji-san,

    No, the registers will not reset if the device goes into Standby mode due to Uvsup. As you said, if this falls below the POR level however, the TCAN4550 will need to be reconfigured.

    Regards,