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TAS5701 in PBTL

Matthew Bramble
Prodigy 20 points
Other Parts Discussed in Thread: TAS5701, TAS5760M

Hi,

I wish to use the TAS5701 in PBTL.

On the TI website and in the datasheet it suggests that the TSA5701 can be used in PBTL for up to  53W.

However there are no details on this at all.

Would anyone be able to steer me here on how to actually do this?

It would be  2.0 system with 2 x TAS5701 in PBTL and a 18V supply. There is a DSP in front of the amps in the chain so I can easily send the same data to L/R on the I2S or invert one channel etc.

Please don't respond with a 'why don't you use newer part XXX'! We have good reasons for using this particular part (even if it is quite old).

thanks,

Matt.

  • 0
    TI__Guru**** 189399 points

    Hi, Matt,

    Sorry, I HAVE to suggest you use a new device - have you looked at TAS5760M? I think it might fit your application.

    As for the TAS5701 PBTL, you just need to use the output filter as shown in the d/s, and tie the outputs together post LC filter. As you said, you will have to handle the data in your DSP.

    -d2

  • 0 in reply to Don Dapkus
    Prodigy 20 points

    Hi Don,

     I'll tie the outputs as you say and do some tests.

    Final question. The TAS5701 has two pins called CONFIG 2 and CONFIG 1 that seem to set the output config.

    They are set to 0 and 1 respectively in all the data I've seen (which gives the standard 2.1 BTL + PWM setup). 

    Do these have any bearing on PBTL mode? 

    I'm wondering what these pins do, maybe they allow SE modes or  disabling the PWM out etc.

    Would it be possible to get the info on these?

    thanks,

    Matt.

    thanks,

    Matt.