• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 30 subscribers
  • Views 466 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.

TAS6684-Q1: peak power per channel in PBTL application

Christian Kleiner
Prodigy 20 points
Part Number: TAS6684-Q1


Tool/software:

Hi TI team,

according to the TAS6684-Q1 datasheet, running the amp outputs in PBTL increases the output power per channel from 215W to 238W (at PVDD = 45 V, 4 Ω, THD = 1%).

I can‘t find a statement regarding peak power in PBTL. What peak power per channel can i expect at 4Ω, PVDD = 45V in PBTL?

Best Regards,

Christian

  • 0
    TI__Mastermind 45085 points

    Christian,

    PBTL only allows you more current into a lower impedance load, but does not allow for any more voltage.  At this point you are voltage limited, and the power will not increase in PBTL from BTL when the impedance is 4 ohms.

    Regards,
    Gregg Scott

  • 0 in reply to Gregg Scott
    Prodigy 20 points

    Hi Gregg,
    yes, sorry, my bad, you're totally right. At 4R, voltage is the limitation. Fortunately, our drivers are custom made. Means we can choose the impedance we need. Do you have an idea how high we can go with peak power if we lower the impedance?

    Best,
    Christian

  • 0 in reply to Christian Kleiner
    TI__Mastermind 45085 points

    Christian,

    You want to look at the acoustic power that you can get from a speaker, not the power you deliver to it.  Lower impedance speakers do not necessarily provide more acoustic output for a given voltage.  You need to look at the custom drivers and see if you want to deliver double the current for the same acoustic results.

    We are updating the datasheet with this graph.  The PBTL 10% power into 2 ohms at PBTL is 450W. 1% THD power is 425W.

    Regards,
    Gregg Scott