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About calcuration method of LM4950 (Power dissipation)

Satoshi
Guru 19645 points
Other Parts Discussed in Thread: LM4950

Please let me know about calcuration method of power dissipation.

For example, LM4950 datasheet-P17: Equation-3, I didn't understand meaning of "2π2".

※Equation-3: PDMAX-MONOBTL = 4(VDD) 2/ 2π2RL: Bridge Mode

What expressing is "2π2RL"?

And, is there application note of audio power (Output power, Power dissipation), please let me know.

 

Best regards,

Satoshi

  • 0
    TI__Mastermind 20085 points
    Hi Satoshi-San

    I have been researching, but I haven't been able to find this information yet, because there is a little information about this device.
    Unfortunately, there isn't an application note for audio power. I'll continue to seek this information.

    Best regards
    José L. Figueroa
    Audio Applications Engineer | A-Team
    Low Power Audio and Actuators
  • 0
    Genius 3295 points

    2π2RL

    This means 2 x 3.14159 ^2 x 8 (if using an 8Ω speaker)... 

    The other information requested can be found in the accompanying graphs.

    Good luck.

    Mike T.