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How to use PREDR_OUTLOW_EN bit(TPS65930).

makoto fujimoto
Prodigy 190 points
Other Parts Discussed in Thread: TPS65930

I use the TPS65930.
Please teach me how to use the Register(PREDR_CTL[7] PREDR_OUTLOW_EN)．
Technical Reference Manual（TRM） has the following two explanation.

1)The PREDR_CTL[7] PREDR_OUTLOW_EN bit enables amplification.
2)PREDR_OUTLOW_EN
  　　Output low-level control bit
　　　　　0x0: Disabled
　　　　　0x1: Enabled (Output = L)

1) recognizes it as the use for starting amplifier.
2) recognizes it as the use for only fixing an output level.

What should I do with this bit(PREDR_CTL[7]) to output a sound from PreDriverR?

  • 0
    TI__Intellectual 2045 points

    Makoto,

     

    PREDR_OUTLOW bit is only used i specific case:

    When you are using an external classD amplifier which has no  enable pin and automaticlly  detect signal on it's input to start. If this amplifier has an High impedance input and you have some noise coupling on the input, you can use the PREDR_OUTLOW to tie the pin low to avoid amplifier to switch-on/off periodicaly.

    In normal use case, keep this bit low.

    regards,

    Alexis

  • 0 in reply to Alexis Piton
    Prodigy 190 points

    Thank you for your answer.
    I understood it.
    You said that in normal use case, keep this bit low.
    Are there any risk and limitations in the case of considering PREDR_OUTLOW as enabling?