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LM5176: LM5176

Burhan
Prodigy 10 points

Part Number: LM5176

We are using LM5176 IC in order to supply TAS5768 power amplifier. We made the design in order it can be operated at 15,3V output levels.

Our input may be in a range 11 to 14 Volts and 24 to 27 Volts and unwanted level of 7-7.5Volts. So our amplifier design with LM5176 must

handle  all above input source cases. 

11 to 14 Volts and 24 to 27 Volts input source is OK. It works as expected. I can draw more than 5A current at 15.3V output. However, with 7V-7.5V input supply, I can draw no more than 1.9A continuous current at 15,3V output. I would expect to get at least 4-5A current at 7V input as well.

Attached is our design. What is wrong with it? Waiting your recommendation if any. Thanks a lot.

  • 0
    TI__Mastermind 28430 points

    Hi Burhan,

    It seems OCP is triggered at low input voltage. Have you observed some waveforms (inductor current, etc.) at 7V input?

    Best Regards,

    Feng Ji

  • 0 in reply to Feng Ji
    TI__Guru 69091 points

    Hi Burhan,

    I have not seen an update for the last 24 days, so I assume the questions are/or answered and the issue is solved.
    I close this thread now. If there is still something open reply and the thread will get open again.
    If you have any other question or of the thread gets locked, please open a new one.

    Clicking the Resolved Button also helps us to maintain this forum.

    Best regards,
    Stefan