• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 63 subscribers
  • Views 215 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.

TPS61033: Returning from pass-through mode

Dice-K
Mastermind 7510 points
Part Number: TPS61033

Hi support team,
This is a question regarding the operation when returning from pass-through mode with MODE=Low setting.

When VIN drops and VOUT becomes less than 97% of the setting target voltage, does it always recover with PWM?
Does it recover using PFM when the load is light?

I'm worried that if it comes back up with PFM, the output voltage regulation will be slower.

Regards,
Dice-K

  • 0
    TI__Genius 12505 points

    Hi Dice,

    At first it is PFM, and then would change to PWM if output voltage doesn't recover. But I think the output voltage will not be too slow, the speed should be similar with load transient (ex, from 0A to 1A load transient).

    Regards,

    Nathan

  • 0 in reply to Nathan Ding
    Mastermind 7510 points

    Hi Nathan,
    Thank you for your reply.

    Does it recover with PFM even under heavy load?
    Or are you talking about light load?

    Best regards,
    Dice-K

  • +1 in reply to Dice-K
    TI__Genius 12505 points

     Hi Dice,

    Sorry that I got something wrong... 

    The device doesn't use PFM when exiting from pass-through, always PWM. Because the entering PFM need the output voltage is a little higher than target output voltage, when exiting from pass-through, the output voltage is lower than target voltage, so it can't be PFM, no matter it is light load or heavy load.

    Regards,

    Nathan