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TPS2553: Current limit

Hirotaka Matsumoto
Guru 27585 points
Part Number: TPS2553

Hi all

Would you mind if we ask TPS2553?
Please refer to the attachment file, and could you give us the advice?
20181001_TPS2553.pdf

Kind regards,

Hirotaka Matsumoto

  • 0
    Guru 27585 points

    Hi all

    If you have some update, could you let us know?

    Kind regards,

    Hirotaka Matsumoto

  • 0 in reply to Hirotaka Matsumoto
    TI__Expert 8980 points
    Hi，Hirotaka Matsumoto,

    Sorry for late reply cuz CN holiday.

    1. Current limit do not have deglitch timre.
    2. Short current limit point is same as Ios,

    For more questions，I will reply you when I back to office next Monday.

    Regards,
    Bob
  • 0 in reply to Bob Ma
    Guru 27585 points

    Bob san

    Thank you for your reply.
    After you back to office, could you give us the reply for these?

    1. Current limit do not have deglitch timre.
    ->Does it mean the current is clamped to limit setting immediately(without deglitch time)?

    2. Short current limit point is same as Ios,
    ->Sorry, we can't not understand the word "los". Is it typo?

    Kind regards,

    Hirotaka Matsumoto

  • 0 in reply to Hirotaka Matsumoto
    TI__Expert 8980 points
    Hi, Hirotaka-San,

    See my input below:

    1. Current limit do not have deglitch timre.
    ->Does it mean the current is clamped to limit setting immediately(without deglitch time)?
    [Bob]:Yes, current limit should be clamped in 2us.

    2. Short current limit point is same as Ios,
    ->Sorry, we can't not understand the word "los". Is it typo?
    [Bob]: It's not typo,, Ios is a parameter in datasheet, which is over current limit threshold and short circuit current limit threshold. I thought you know it, because the second question in attached file is" How much is the threshold of Short-Circuit? Is it the same as Ios". So the answer is 266mA, short-circuit threshold is same as Ios.

    3. Your 3rd question in attached file "TPS2553 in not fit for limitation of audio loads? Is it fit for DC load?"
    [Bob]TPS2553 is fit for DC load, many customer use it for USB charging. I am not sure if it's fit for audio load. My proposal is:
    (1)How much is output cap? The Iout in waveform is current behind the output current, correct? I am curious if output cap supply current to cause current over 266mA?
    (2) Can you give me the schematic, maybe I can try to figure out if TPS2553 fit for audio loads.

    Regards,
    Bob
  • 0 in reply to Bob Ma
    Guru 27585 points

    Bob san

    Thank so much for your reply.

    About "2. Short current limit point is same as Ios", we apologize that I mis-understood the spelling between los(Los) and Ios(Ios),
    We recognize Ios parameter.

    (2) Can you give me the schematic, maybe I can try to figure out if TPS2553 fit for audio loads. 
    ->Now, we ask our customer to share it.

    Kind regards,

    Hirotaka Matsumoto