• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 328 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.

TPS65631: Timing issue

CHEN YAN
Intellectual 1430 points
Part Number: TPS65631

Hello,

Customer has met a timing issue of TPS65633BK, do we have to wait a time of tINIT + tVO2(SCP) then we can start digital

programming procedure? As the total time is >10ms, every programming procedure is inconvenient.

 

What if we start digital programming after tINIT ?

  • 0
    TI__Expert 6330 points
    Hi,

    I have notified our expert regarding this topic. Please expect a response by 3/20/19.

    Thanks,
    Aaron
  • 0
    TI__Mastermind 18550 points
    Hello Chen,
    If desired, programming can be started after Tinit but the ELVSS will not start ramping down to -4V until after Tinit+Tvo2(scp) have elapsed.
    For ELVSS, if some value other other than default of -4V is programmed, the device will first ramp to -4V and than start ramping to the newly programmed value. So effectively, it is almost the same as if programming is started after Tinit+Tvo2(scp) have elapsed.
    I hope this answers you query.
    Kind Regards,
    Liaqat
  • 0 in reply to Liaqat Khan
    TI__Intellectual 1430 points

    Hi Liaqat,

    Thanks for your reply! So if the programming process is before Tinit+Tvo2(scp) and after Tinit, the programming could start after Tinit+Tvo2(scp)? The distinction between this operation and programming is started after Tinit+Tvo2(scp) have elapsed is this operation saves programming process time? Is it right?

    Best Regards.

  • 0 in reply to CHEN YAN
    TI__Mastermind 18550 points
    Hi Chen,

    The programming could start after Tinit but it will not take effect until Tinit+Tvo2(scp) time has passed. The only time one will save by programming after Tinit (but before Tvo2(scp)) will be the programming time which is, assuming a typical 20us pulse period is used, would be about 1ms for 50 pulses. So customer will typically save less than 1ms by starting to program before Tinit+Tvo2(scp) have passed.

    To answer your question more directly:
    -----------------------------------------------------
    The distinction between this operation and programming is started after Tinit+Tvo2(scp) have elapsed is this operation saves programming process time? Is it right?
    -----------------------------------------------------

    yes, that is right.

    Kind Regards,
    Liaqat