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TAS2553: open load detection?

Nate Enos
Genius 9410 points
Part Number: TAS2553
Other Parts Discussed in Thread: LM48100Q-Q1, TAS2505-Q1, TAS2505

Hi Team,

This question is related to my post on the audio converters forum:  

I'm trying to architect a system that has two I2S inputs and a single mixed mono output. I'm looking for something that has short circuit and open load detection, like the LM48100Q-Q1. Can the TAS2553 do short circuit and open load detection with the IV sensing? I searched around the datasheet but didn't see any mention of it. My thought is it potentially use two of these tied together for a single output. If this won't work, is there another amp that's a better option? Some way of doing either two I2S inputs (with 1 or 2 chips) or a single analog input (which would take in the premixed signal) would work. 

Thanks! 

Nate

  • 0
    TI__Guru* 95455 points
    Hi Nate,

    Maybe the IV sense feedback could be processed somehow for open/short load detection, however this processing must be made in a separate device as there is no internal processing for this in the device.
    How much output power do you need? The TAS2505 has short circuit protection that reports the short event using a register, but open load detection is not currently supported from withing the device. Although there is a TI Design for load diagnostics using TAS2505-Q1 that may be useful.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    TI__Genius 9410 points

    Hi Ivan,

    Thank you for the quick feedback. 1W into 8ohms is all we need. I noticed the TAS2505-Q1 with the app note on open load detection. That may be an option, but ideally we're trying to integrate it. I'll likely move forward with the LM48100Q-Q1, since I just found out we need an ADC as well. This will allow us to integrate the diagnostics in the amp and use a codec for the I2S inputs. 

    Thanks for the help! This is all I need unless there's another amp with open load detect integrated. 

    Nate