• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 1122 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.

TPA3255 0.5 ohm load 15 amps 0.1 Hz

haim rozenboim
Prodigy 90 points
Other Parts Discussed in Thread: TPA3255I plan to use the TPA3255 audio amplifier for a special application (not audio)
Drive 15 Amp to a 0.5 ohm load at 0.1 Hz (112 watt).
Do you think the amplifier can drive a load of 0.5 ohms?
The TPA3255 input impedance is 20 k ohm; add coupling capacitance of 470u allows driving 0.1 Hz signal.
But it is not clear from the specification how the amplifier will respond at such a low frequency
What will be the THD?
Theoretically Class D amplifier can work in DC is TPA3255 have any minimum frequency limit?
Thank you
Haim
  • 0
    TI__Mastermind 27980 points
    Hi Haim,

    Theoretically this should be possible, the current limit of the TPA3255 is 17 Amps per full bridge, so in PBTL mode that would be 34 A peak available. Your application looks like it would take about 22 A peak, 15 Arms, for 112 Wavg. However, we do not run any tests or characterization below 10Hz, and thermal will definitely be something to watch out for if this will be a continuous output. So I am not sure what the performance would be, I will look into this more and get back to you on what I find.

    Justin