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TLV320DAC3100: Test for Detection of Open Loads

K.Yaita
Guru 29690 points
Part Number: TLV320DAC3100

Hi Team,

There is application note of "TLV320DAC3100 Test for Detection of Open Loads".
Could you tell me specification (rated voltage, allowable ripple current, etc) of 220uF capacitor that is required? 


http://www.ti.com/lit/an/slaa540b/slaa540b.pdf

Best Regards,
Yaita / Japan disty

  • 0
    TI__Guru* 95335 points
    Hi Yaita-san,

    You should select these capacitors with a voltage rate of above SPKVDD.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    Guru 29690 points

    Hi Ivan-san,

    Thank you for your support.
    Regarding "allowable ripple current" of the capacitor, I believe approximately 0.8A is required if 2.5W@4ohm application.
    -------------------------------------------------------
    I^2 = P / RL = 2.5 / 4 = 0.625
    I = 0.79 (A)
    -------------------------------------------------------
    Is my understanding correct?
    If the answer is yes, my customer think it is difficult to use the capacitor that meets the requirement because of size constraint of his application.

    Best Regards,
    Yaita

  • 0 in reply to K.Yaita
    TI__Guru* 95335 points
    Yaita-san,

    This might be a good reasoning of the current through the capacitor. Although the application note you shared (www.ti.com/.../slaa540b.pdf) also has some considerations for the audio volume level, is this being taken into account?

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators
  • 0 in reply to Ivan Salazar
    Guru 29690 points

    Hi Ivan-san,

    Thank you for your reply.
    I will inform the following to my customer as consideration.
    >Although the application note you shared (www.ti.com/.../slaa540b.pdf) also has some considerations for the audio volume level, is this being taken into account?

    Best Regards,
    Yaita / Japan disty