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TLV320AIC3107: TLV320AIC3107 questions

Nir Flysher
Expert 3367 points
Part Number: TLV320AIC3107

Dear Team,

Please see below questions from my customer

I saw that there are flags for short circuit protection, relating to high power outputs.

Q1: Is there any for the CLASS-D output also ?

Q2: I tried by design to connect the SPOP / SPOM signals to the SWINP/SWNP, and I realized that is damaging the whole CODEC.

        My target was either divert the output of the CLASS-D to the speaker trough the internal  SWITCH,

        And either in TEST mode (of my system) to monitor the CLASS-D output with analog circuitry, and disconnect the speaker .

       Is not the internal switch an analog one ? and is there code configuration that can be made to allow such operation ?

 

We also would like to bring to you and TI team attention that at bring up of Audio card in one of our products ,

we discovered  that :

LEFT LOP  Power Status  - Register 86  D0  is R/W  and NOT only Read (as written in the datasheet revD) , and we had to configured it manually to “1” in order to divert the L_LOP  signal to the internal CLASS-D power amplifier input.

Also probably RIGHT LOP Power Status – Register 94 D0 is R/W  and NOT only Read.

 Best regards,

Nir.

  • 0
    TI__Guru* 84915 points
    Hi, Nir,

    A1. Unfortunately, the TLV320AIC3107 doesn't have protection for Class-D output. This feature was implemented in more advanced codecs such the TLV320AIC326x family.

    A2. The SPOP and SPOM only can be connected to the SWOUTP and SWOUTM respectively. Figure 37 shows a typical connection for this. Any different usage of these outputs may result in a damage.

    Finally, the last observation about the read-only bit is correct. These bits should be R/W bits since they fully enable the output drivers. We will notify this mistake in order to avoid future confusions.

    Best regards,
    Luis Fernando Rodríguez S.