• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 31 subscribers
  • Views 380 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.

Original question:

TPA3113D2: Power amplifier

TPA3113D2: Power amplifier

Josh5566
Prodigy 190 points
Part Number: TPA3113D2


Hi,

We need to change the speaker from 4ohm 1.5W to 4ohm 3W. Then what is the plimit value(R459) need to set?

In addition, how to enhance the low bass feeling? 

note

the amplifier circuit already reviewed prevent so you don't need to re-check it.

SCHEMATIC1 _ 19 AUDIO-AMPIFIER_.pdf

  • 0
    TI__Mastermind 28250 points

    Hi Josh5566,

    I thought you were previously using a 2W speaker not 1.5W.

    I'm not sure what the maximum power you want to drive your 4ohm 3W speaker but if it's 3W then the voltage you would need PLimit to be is about 1.225V. Please refer to section 7.3.3 PLIMIT of the TPA3113 datasheet for more details!

    I'm not sure I understand what you mean by low bass feeling. Can you please give me more details on what you are wanting? 

    Best Regards,

    Robert Clifton 

  • 0 in reply to Robert Clifton56
    Prodigy 190 points

    Hi Robert,

    Thanks your replied. I already modified the plimit value. Low bass feeling means bass for speaker.

    In addition, if SD pin enable from SOC's GPIO, the speaker has a pop noise, how to improve it?

  • 0 in reply to Josh5566
    TI__Mastermind 28250 points

    Hi Josh,

    The amplifier can't further amplify bass signals more than the other signals as it doesn't have any advance signal processing. However it's possible that the input filter on the front end could be attenuating the bass signals. Section 8.2.1.2.5 Input Capacitor, CI of the datasheet goes over this. 

    Are you making sure to allow the DC blocking input capacitors to fully charge up after coming out of shutdown before playing audio through it? If not this could be a reason you are hearing more pop noise. We recommend about 14ms in the datasheet. 

    Best Regards,

    Robert Clifton