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TPA2026D2: shutdown sequence

K.Yaita
Guru 29690 points
Part Number: TPA2026D2

Hi Team,

The datasheet page.23 shows the following and I would like to ask two questions.



1)
What does "interrupt " indicate? Should I regard it as "I2C access"?

2)
I understood there are three options to disable the amplifier as the following.
------------------------------------------------------------------
There are several options to disable the amplifier:
• Write SPK_EN_R = 0 and SPK_EN_L = 0 to the register (0x01, 6 and 0x01, 7). This write disables each speaker amplifier, but leaves all other circuits operating.
• Write SWS = 1 to the register (0x01, 5). This action disables most of the amplifier functions.
• Apply VIL to SDZ. This action shuts down all the circuits and has very low quiescent current consumption. This action resets the registers to its default values.
------------------------------------------------------------------
Is there recommended shutdown sequence for TPA2026D2?
Do you recommend to disable speaker amplifier (SPK_EN_R = 0 and SPK_EN_L = 0 or SWS=1) before applying VIL to SDZ?

Best Regards,
Yaita / Japan disty

  • 0
    TI__Mastermind 20085 points
    Hi Yaita-san,

    1) Interrupt means not changing or oscillating the shutdown pin voltage when It is activated.
    2) No, There isn't. But It is a good idea to disable the amplifier digitally before disabling it through hardware in order to avoid issues like Pop noise.

    Best Regards
    José Luis Figueroa
    Audio Applications Engineer
  • 0 in reply to José Luis
    Guru 29690 points

    Hi Jose-san,

    2) Thank you for your helpful comments.
    Do you know how much wait time is required from disabling the amplifier (SPK_EN_R = 0 and SPK_EN_L = 0 or SWS=1) to apply VIL to SDZ?
    I believe we should decide the wait time by evaluation, but would like to have your comment just in case.

    Best Regards,
    Yaita

  • 0 in reply to K.Yaita
    TI__Mastermind 20085 points
    Hi Yaita-san,

    You can refer the datasheet's figure 29 to find this information.

    Best Regards
    José Luis Figueroa
    Audio Applications Engineer