• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 62 subscribers
  • Views 916 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

UCD9081: UCD9081 Power on and Power off Sequencers

user5101417
Prodigy 50 points
Part Number: UCD9081

Hi,Ti

I'm using UC9081 to control digital circuit power sequencers.

12V is power supply.Other power rails is from 12V.

I want UC9081 to do following things:

1)Power on:12V(resistor divide to 2.7V)->0.9V->0.95V->1.8V->1.8V_IO

2)Power off:1.8V_IO->1.8V->0.95V->0.9V->12V

Is it ok?

Thank you!

  • 0
    TI__Guru 58040 points
    Hello
    For the power on: yes, this can be achieved by below three ways. pickup one to fit your applicaiton.
    • Time—number of milliseconds before this rail is enabled.
    • Parent (Reg)—number of milliseconds to delay after the parent rail achieves regulation before
    enabling this rail.
    • Parent (V)—voltage at which the parent rail must be before this rail is enable

    For Power down: a different shutdown delay can be set for each rail to achieve the off sequencing.
    Thanks
    yihe
  • 0 in reply to yihe
    Prodigy 50 points

    Hi,TI

    I have another question about UCD9081.

    By reading documents about UCD9081,I have known that a TI USB to I2C adapter can configure UCD9081 by TI GUI on pc.

    Can this TI adapter be replaced by other general USB to I2C adapter ?

    Thank you!

  • 0 in reply to user5101417
    TI__Guru 58040 points
    You can use other I2C adapter, but the TI GUI only works with that particular adapter.
    Regards

    Yihe