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  • TI Thinks Resolved

TPS61170-Q1: Tps61170-q1

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Replies: 5

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Part Number: TPS61170-Q1

Hi Team

     1:Tps61170-q1 PWM(pulse width modulation) control to adjust the output accuracy and the use of PWM signal programmable FB voltage precision, which way the voltage precision is higher? Thank you very much!

     2:Tps61170-q1 as shown in the figure, what is the parameter of RC? Thank you very much!

  • Dear Sir,
    1. Use the default 1.229V reference will get the most accurate voltage.
    2. The internal RC time constant is around 1ms.

    Best Regards,
    Helen

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  • In reply to Helen chen:

    Hi Helen
    There are two voltage adjustment method for TPS61170, one is PWM duty cycle control of CTRL pin, another is easy scale program;
    what is the internal realization diagram for easy scale method? What about the accuracy of these two method?

    Many thanks!
  • In reply to user6041007:

    Hi Ranen,
    The PWM duty cycle can be set at any duty. While the easy scale program only have 32 steps. So it depend on your needs.

    Best Regards,
    Helen

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  • In reply to Helen chen:

    Hellen,
    I am not confused about the resolution, but the reference accuracy.
    For PWM duty cycle adjustment, the accuracy is affected by PWM frequency, duty accuracy, 1.229V accuracy and RC filter.
    and I do not know the easy scale internal diagram, so do not know which parameter affect the reference accuracy when using easy scale.
  • In reply to user6041007:

    Hi Ranen,
    The easy scale mode has better accuracy. It is of +-2.5% accuracy for each step voltage..

    Best Regards,
    Helen

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