• State TI Thinks Resolved
  • Locked Locked
  • Replies 10 replies
  • Answers 2 answers
  • Subscribers 29 subscribers
  • Views 416 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TPA2012D2RTJR No sound under Ubuntu, what's the problem?

Rong Jia
Prodigy 10 points
Part Number: TPA2012D2

Tool/software:

TPA2012D2RTJR No sound under Ubuntu, what's the problem?

  • 0
    TI__Genius 10305 points

    Hey Rong,

    Please forward a schematic for review. 

    Regards,

    Ore.

  • 0 in reply to Ore Ogundana
    Prodigy 10 points

    Hi Ore,

    Please see schematic ,It works fine on Windows, but there is no sound on Ubuntu 24.04.TPA2012D2RTJR No sound schematic.

  • 0 in reply to Rong Jia
    TI__Genius 10305 points

    Hey Rong,

    I am having a hard time reading this schematic. 

    Can this please be provided in .pdf format?

    Regards,

    Ore.

  • 0 in reply to Rong Jia
    TI__Genius 10305 points

    Hey Rong, 

    This still looks like a link. Upload an unlinked pdf to the thread.

    Regards,

    ore

  • 0 in reply to Ore Ogundana
    Prodigy 10 points

    Hi Ore,

    Please see pdf file,or send me your email,i will email to you ,thank you

    3568.TPA2012D2RTJR No sound schematic.pdf

  • 0 in reply to Rong Jia
    TI__Genius 10305 points

    Hey Rong, 

    Here are my comments:

    • Understand that SDR,SDL are active low pins. If 0.35V is on these pins, device is in SD mode.  
    • if PVDD and AVDD are shorted they could share a single pair of 0.1uF and 1uF or both could be separate lines with the same voltage where PVDD takes the higher cap value for decoupling.
    • The UG has a perfect example for both schematic and component values to pick.... you could implement those values and configurations.
    • Pick ferrite beads or inductors with saturation currents close to the Idd of the IC and output current of the IC. Idd is stated in the DS as 4mA to 9mA with no output filter. The output current could be derived from using this following formula and method 
      • P=(Vrms)^2 / R . derive R and Vrms from here
      • Vrms=IR should determine the Iout for TPA2012. 
    • Based on the 120KOhm selection on the gain pins, you can use V=IR (V between 2.5V to 5.5V and R=120KOhm) to determine the current rating on these pins for safe current operation of those pins. Right now your resistor is lower in impedance.

    images:

    active lo and hi

    pvdd and Avdd pair from ds:

    pvdd and avdd separation from evm:

    Idd:

    Output power:

    Regards,

    Ore.

    TI: isnt responsible for customer design. Design choices are up to customer to make.

  • 0 in reply to Ore Ogundana
    Prodigy 10 points

    After testing, it is not related to the line; it is still a driver issue. It is normal in Windows 10, but the SPK device cannot be found in Ubuntu. Could you please help check what the problem is? Thank you.

  • 0 in reply to Rong Jia
    TI__Genius 10305 points

    Hey Rong, 

    From what I understand, the setup works on a different driver but not with the new driver you switched over to. 

    Seeing as this is a purely analog amplifier, it is not clear what you mean by "finding this IC on your driver". 

    Could you please elaborate what you mean by you see this IC on your windows driver but not Ubuntu? For example, provide a screenshot of windows recognizing this device. 

    I still strongly suggest implementing the HW configurations for optimal performance. Sometimes, devices work well on one system with a certain configuration and stop working with the same configuration but on a different system. 

    Regards,

    Ore.

  • 0 in reply to Ore Ogundana
    TI__Genius 10305 points

    Hey Rong, 

    I would emphasize if the HW configuration is working in one setup, I consider the AUDIO IC to be fully functional on your end. Please when switching over to a different system, please make sure you are using the right HW cfg and maybe try to check the differences between the Windows setup and Ubuntu.

    I would consider this thread closed.

    Regards,

    Ore.