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Original question:

TPA3116D2: 12V power supply

TPA3116D2: Power supply for 50W output

Menaka Srinivasan
Intellectual 520 points
Part Number: TPA3116D2
Other Parts Discussed in Thread: TLV320AIC3204

Hi,

My input voltage is 5V. Can i get 50W mono output from TPA3116D2 and what should be the amperage for my input power supply? 

Thanks

  • 0
    TI__Mastermind 19820 points

    Hi,

    The max input VICM is 2.5V. So the 5V input is not suitable.

    Derek,

    Regards

  • 0 in reply to Yanming Gong
    Intellectual 520 points

    Hi,

    Thanks for the reply.

    TPA3116D2 has different gain settings, what will be the current for each of the gain setting as shown in the image below

    I have planned to interface an audio codec to TPA3116D2, High-Level and Low-Level input voltages for the audio input are not mentioned in the datasheet.

    Can you please clarify these.

    Awaiting your reply.

    Thanks

  • 0 in reply to Menaka Srinivasan
    TI__Mastermind 19820 points

    Hi Menaka,


    The TPA3116 max VCIM is 2.5V.

    And what's the current? output?

     

    Derek,

    Regards

  • 0 in reply to Yanming Gong
    Intellectual 520 points

    Hi,

    Can you please let me know VIH and VIL value for audio input signals ( RINP, RINN, LINP, LINN ) for interfacing. 

    Please let me know the value for the '?' in the above image

    Thanks

  • 0 in reply to Menaka Srinivasan
    TI__Mastermind 19820 points

    Hi,

    The AC input range is -2.5V~+2.5V.

  • 0 in reply to Yanming Gong
    Intellectual 520 points

    Hi,

    Thanks for the reply!

    Kindly clarify the below questions.

    1. I am planning to interface audio codec - TLV320AIC3204 to audio amp - TPA3116D2. Please refer the below reference block diagram. Can I interface this codec with TPA3116D2 in the below configuration? If yes, please clarify if the IO voltage levels of both the parts will match and will not cause any issue.

    If not, can you please suggest an audio codec suitable for interfacing with TPA3116D2 and required audio input is I2S microphone.

    2. If the above interface is correct, can the line out of the audio codec be directly connected to the audio amplifier or any signal amplifier should be used for this?

    In reference to the TPA3116D2 design - http://www.ti.com/lit/df/tidrd32/tidrd32.pdf, the input to TPA3116D2 is given through amplifiers as shown below.

    Please clarify the need for this amplifier at the input.

    Kindly sought out the above queries. Awaiting your reply.

    Thanks

  • 0 in reply to Menaka Srinivasan
    TI__Mastermind 19820 points

    Hi,

    1） The codec connection with TPA3116D2 is fine. BTW, most codec outputs are differential. if so, we suggest using differential input connection.

    2) Adding the low-pass filter to suppress the out-of band noise is important. The design you show to me is multiorder low pass filter.

    Derek,

    Regards

  • 0 in reply to Yanming Gong
    Intellectual 520 points

    Hi,

    Thanks for the reply!

    Please find my below questions

    1. For mono output, do I need to interface differential signal to TPA3116D2 from codec? If yes, does it mean that mono output do not depend on input type ( differential or single ended )?

    2. If 2.5V signal is provided as input to TPA3116D2, can it be amplified and will TPA3116D2 be able to produce 50W mono output?

    3. Can you suggest me what out of band filter to be used and how to use it?

    Please clarify the above questions

    Thanks

  • 0 in reply to Menaka Srinivasan
    TI__Mastermind 19820 points

    Hi,

    1) Yes, you can use differential input for momo design. It does not depend on input type.

    2)  Yes. The max gain is 36dB.

    3) You can refer TPA3116 EVM design.

    www.ti.com/.../slou336b.pdf

  • 0 in reply to Yanming Gong
    Intellectual 520 points

    Hi,

    Thanks for the reply!

    1. Can you please confirm if the below configuration is correct for the differential input for the TPA3116D2?

    2. To set maximum gain is there any register setting or only resister combination?

    3. Is low pass filter mandatory for the input to TPA3116D2? Since it is mic input all frequencies should be considered right so is filter circuit mandatory?

    I see in some circuits, RC filters are used at the input of amplifier but in some only coupling capacitor is connected between the codec and the audio amplifier?

    In the TPA3116D2 EVM design that you referred above, only coupling capacitor is connected at the input of the TPA3116D2. What filter design do you suggest?

    4. At the output of the TPA3116D2, what filter design should be used? If LC filter design is to be used can you suggest the value of LC when 50W mono output is required from the TPA3116D2

    Please clarify my above questions.

    Awaiting your reply

    Thanks

  • 0 in reply to Menaka Srinivasan
    TI__Mastermind 19820 points

    Hi,

    1) I can not open the picture.

    2) For gain setting, no registers can be config, only use resistors. Please see the Table 1 in datasheet.

    3) It is better to add the low-pass filter on input. Because for system level, there maybe high frequency noise. 

        RC low-pass filter or multiorder low pass filter is fine.

    4) For LC filter, you can refer TPA3116 EVM design. The EVM design is for 50W, 10uH+0.68uF filter.

    Derek,

    Regards

  • 0 in reply to Yanming Gong
    Intellectual 520 points

    Hi, 

    Thanks for the reply!

    1. Please find the image for the configuration mentioned in Q1 of my previous post.

    I have connected the LOL and LOR of codec ( TLV320AIC3204 ) to the RINP and RINN pins of TPA3116D2.

    2. Okay

    3. Can you suggest me the recommended value of R and C for the low pass filter? The recommended value of input coupling capacitor mentioned in the datasheet.

    4. Okay

    Kindly clarify my above queries.

    Awaiting your reply

    Thanks

  • 0 in reply to Menaka Srinivasan
    TI__Mastermind 19820 points

    Hi,

    1. The connection is fine. Do not add the input capacitors on TPA3116 input pins.

    3. The cutoff of the RC filter must be greater than 20KHz. The common RC filter design is 499ohm+1000pF.

    Derek,

    Regards

  • 0 in reply to Yanming Gong
    Intellectual 520 points

    Hi,

    1. Can you please clarify why coupling capacitor should not be connected to the input pins of TPA3116D2? Because in most of the reference circuits coupling capacitor is used after RC filter

    2. What should be the gain value to get 50W mono output from the amplifier?

    Please clarify the above questions.

    Awaiting your reply.

    Thanks

  • 0 in reply to Menaka Srinivasan
    TI__Mastermind 19820 points

    Hi,

    Sorry, That's mistake. I want to say: Do not forget to add the input capacitors on TPA3116 input pins.

    The Gain setting is related to the input signal level, this is system topic. You can adjust the gai setting by resistors, please refer the datasheet detail information.

    Derek,

    Regards