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TAS2557: TAS2557 Class-D Efficiency

Ian Wang
Mastermind 30450 points

Part Number: TAS2557

Dear Sir,

May I know TAS2557 Class-D efficiency? customer doesn't want to using boost and want to check it. 

Thanks, Ian.

  • 0
    TI__Guru** 114635 points
    Hi Ian,

    Let me gather some data and I'll share it with you as soon as possible.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    TI__Guru** 114635 points

    Hi Ian,

    The efficiency follows the same tendency as shown in figures 13 and 14, without the efficiency fall. You could crop these plots at this fall, or continue with the tendency.

    Actually when efficiency reaches its maximum (before the efficiency fall), and if boost is not enabled, then the output will start clipping because the output has reached its maximum range.

    The fall in efficiency is due to the boost enable. When output is large enough to enable the boost, it is powered up, but as the boost output is higher than the required output then efficiency is lower, once the output goes higher the efficiency is better as it approaches the total boost output.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators