• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 225 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

TPA2017D2: The default values can be changed at factory during production?

NY
Expert 3040 points
Part Number: TPA2017D2
Other Parts Discussed in Thread: TPA2016D2

Hi team, 

Question1

Datasheet commented describes below:

“The default values for the TPA2017D2 AGC function are given in Table 2. The default values can be changed at

the factory during production. Refer to the TI representative for assistance with different default value requests.”

Default value of gain is fixed at 6dB, what the range of gain we can change (e.g., 3-10db?)?

Customer required specific gain changes to 12dB or 18dB, is it possible?  what's the lead time of changes?

Question2:

As alternative option, customer can find TPA2016D (gain programmable via I2C), based on datasheet, Efficiency vs Output power (fig.15 &16)

Shows RL=4ohm seems better efficiency, but since basically low impedance of output is better, so why 8ohm is better?

Is there any difference between TPA2017D vs TPA2016D expect I2C programmable?

Question3: 

TPA2016D seems alternative option gain control instead of TPA2017D, is there any option? 

Question4: 

Customer want 18dB, TPA2017D if the efficiency is not significantly getting worse, how the higher gain value affects efficiency?

Best Regards,

ny 

  • 0
    TI__Guru* 84915 points

    Hi, NY,

    Please take a look at my responses below and let me know if you have additional questions or comments.

    1.- Thank you for pointing out this information from the datasheet. Unfortunately, we don't support the parameters modification anymore. This datasheet version comes from April 2009. It has not been updated since 10 years ago. We will review this datasheet version in order to avoid future confusions.

    2.- Effectively, 8-ohms provides a better efficiency due to its relation between thermal performance and current. You may refer to section "Efficiency and thermal information" for details. In addition, you may take a look at figures 9 and 10 for reference.

    https://www.ti.com/lit/ds/symlink/tpa2017d2.pdf#page=8

    The only difference between these two devices is the hardware vs software control. The TPA2016D2 offers more options to monitor the device and different configurations for the AGC block.

    3.- This is correct, the TPA2016D2 has many options compared with the TPA2017D2. It supports an adjustable gain range from -28dB to 30dB.

    4.- As mentioned previously, a higher gain demands a current increment. This current increment generates a thermal performance modification which is traduced in a lower efficiency.

    I hope this helps you. Let me know if you have additional questions or comments on this.

    Best regards,
    Luis Fernando Rodríguez S.