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TAS5754M: Feature Question

Blake Hale
Prodigy 100 points
Part Number: TAS5754M
Other Parts Discussed in Thread: TAS5766M, TAS5782M, TAS5825M

I was originally looking at the TAS5766M due to the advantages of smart SPL and Thermal/Current protection it can provide.  However its Fixed flow does not allow for a few features that i need for my product.  The TAS5754M product seems to be able to provide the additional Mixing features i need with its Mon Hybrid flow mode.  My question is does this part offer the same types of smart protection as the TAS5766M?  I have looked thru the datasheets, but its not 100% clear to me.  Can the speaker characterization data from the learning board be imported into its flow and provide the Smart SPL, Bass Enhance, and Thermal/Current protections that the TAS5766M fixed flow provides?

-Thanks,

  • 0
    TI__Guru 52115 points
    Hi Blake,

    No. TAS5754M/56M doesn't support the Smart Amp flow.

    I would suggest you take a look at TAS5782M and TAS5825M. These new devices can both run the Smart Amp flow and also offer more advanced processing features, like the mixing feature you want.

    Andy
  • 0 in reply to Andy Liu (BMS)
    Prodigy 100 points
    The TAS5825M looks pretty close. My application is a Mono design, but looking at the application note on the available DSP flows it doesn't appear that there is an option for a mono only design using PBTL configuration, even though the datasheet shows a PBTL application schematic? In truth i really don't need the extra current/power of PBTL for my application, but i do only need one channel of amplification. Can simply only use one of the two channels on the device and leave the second channel unused? would there be any gocha's with this approach? Can one of the channels simply be configured to be turned off completely. would i have to tie the unused channel outputs to something or could they just be left floating?
    Thanks
  • 0 in reply to Blake Hale
    TI__Guru 52115 points
    PBTL mode is usually recommended for mono applications since TAS5754M is not able to simply disable one channel.

    If you do prefer the BTL mode for you design, bootstrap caps are still required but the output filer is not necessary.