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TPA6030A4EVM: TPA6030A4EVM

Varun Kumar
Prodigy 10 points

Part Number: TPA6030A4EVM
Other Parts Discussed in Thread: TPA6030A4

We are looking for experimental setup and utilize TPA6030A4EVM module as a power amplifier to reduce the burden on function generator which has got min Z of 50E and not lesser than that.

Basically we need to give some test sinusoidal signals of 10V p-p (with 5V offset: +ve side only) output from function generator and use it to connect a load Z of 25E. Hence to meet the load Z we would like to use this evaluation board for testing the waveforms on the loads.

The loads here are filter boards. The signals will be sinusoidal with frequencies being given from 1kHz to 20kHz of that magnitude mentioned above.

Will this EVM board is suitable for the application which we are looking for?

PFA block diagram FYR:

Thanks.

  • 0
    TI__Guru** 113575 points

    Hi Varun,

    My main concern on this test is the input range of the amplifier, you're planning to use a 10Vp-p signal so you must make sure to supply proper PVcc voltage level so that input common-mode range is wide enough.
    I'll get an EVM to try such large signal myself, but it may be available until end of this week or early next week.

    Based on your description, I'd say this EVM could be used for that purpose, although there are a few questions I'd like to ask to better understand the test case and if there is a better alternative.

    • Is there a particular reason why you're considering TPA6030A4?
    • All 10 lines for all 6 boards are connected simultaneously, correct? What is connected at the output of each filter? Is it only a tester to inspect the waveform or something like that? Just curious about this to make sure there is no high load at the output of the filters.
    • TPA6030A4 features 2 channels, I would suggest to split the tested lines for each of the channels ie. 30 test lines each.
    • Perhaps some wide voltage range RRIO OpAmps could be a simple alternative to drive the filter boards.

    Best regards,
    -Ivan Salazar
    Applications Engineer

  • 0 in reply to Ivan Salazar
    Prodigy 10 points

    Thanks for quick response Ivan.

    PVcc voltage level would be kept at 12V to 13V as supply.

    • Is there a particular reason why you're considering TPA6030A4? (Its basically meeting the power requirements of >1W and using single polarity supply of >12V to meet 10V p-p and provide proper amplification in terms of power from 1kHz to 20kHz signals without drop in amplitude for this frequency range.)
    • All 10 lines for all 6 boards are connected simultaneously, correct? (YES) What is connected at the output of each filter? Is it only a tester to inspect the waveform or something like that? (YES Correct) Just curious about this to make sure there is no high load at the output of the filters.
    • TPA6030A4 features 2 channels, I would suggest to split the tested lines for each of the channels ie. 30 test lines each. (YES Agreed shall use like that)
    • Perhaps some wide voltage range RRIO OpAmps could be a simple alternative to drive the filter boards. (Maybe we can look for but time is running out for me). So I am ok if this works out.
  • 0 in reply to Varun Kumar
    TI__Guru** 113575 points

    Hi Varun,

    Thank you for your feedback.
    The mentioned voltage supply and overall connections seem OK. I'm currently waiting to get the EVM in the lab, I'll let you know as soon as I have some test results. As mentioned this may be end of this week or early next week.

    Best regards,
    -Ivan Salazar
    Applications Engineer

  • 0 in reply to Ivan Salazar
    Prodigy 10 points

    Hi Ivan,

    Just received EVAL board this week. Arranged the Jumper settings as follows and external capacitors of 220uF/50V electrolytic capacitor inseries with 1.2kE to Gnd being placed as shown in the image. (As per recommended settings from datasheet).

    J1 - shorted (SE shorted)

    J2 - Open (HP)

    J3- Open (HP-SE)

    Tried to give an input from function generator of 5Vpp with 3V offset at input lines.

    Observed output of 2.24Vpp only with a shift of 5V at the output side observed between Line- to Gnd pin. (NO LOAD CONNECTED AT O/P FOR NOW).

    Arrangement & Settings:

    Waveforms:

    Queries:

    1. Why the output voltage is shifted upto 5V and then have only amplitude of 2.24V p-p?

    I need the output to be same as input. What are the settings to be done to achieve this with & without load.

    2. Why the output is coming only in Lout- wrt Gnd pin instead of Lout+ to Gnd for SE operating mode as is the jumper settings done.

    3. What I am looking for is o/p to be same as i/p with load of 25E & without load being connected across o/p.

    Please tell me if any settings are done wrongly or anything else to be done to achieve my goal.

    Also need to understand the difference between BTL and SE modes and which one does suit for my application.

    (My understanding is SE suits to my application as I need same voltage as i/p, not half of it and support my loading).

    Please correct me if my understanding is wrong.

  • 0 in reply to Varun Kumar
    TI__Guru** 113575 points

    Hi Varun,

    I just recently got an evaluation module as well, but I've been caught up in several other projects at the time. Let me try to revisit this over next week and give you some comments.

    Best regards,
    -Ivan Salazar
    Applications Engineer

  • 0 in reply to Ivan Salazar
    TI__Guru** 113575 points

    Varun,

    The center voltage at each output will be about half of your supply voltage, ie. if supply is 12V you'll have an output centered at 6V. If you need the signal from each output to center at GND, you would need to add AC coupling (series) capacitors.
    If your load is differential, I would better use BTL output instead of SE.
    Regardless if it's BTL or SE, you may need to adjust the VOLUME knob on the EVM to adjust the gain for 1:1. The adjustment may be different with/without the load depending on how much the load is loading the driver.

    Best regards,
    -Ivan Salazar
    Applications Engineer