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TAS5624A DC Blocking Capacitor in SE Mode

Hi,

Are there any problems that would occur except the pop noise issue if replacing 470uF with 10uF which is the dc blocking capacitor in the SE mode ?
Could you please give me your advice about it ?

Best regards,
Kato

  • Hello Kato-san,

    We have not tested this but we would not expect the pop performance to be much different. The output of the Class-D can drive a lot of current into the output DC blocking capacitor and charge it at the PWM ramp rate set by C-Start value. Both 470uF and 10uF capacitors should charge at the same rate.

    If anything, the pop performance of the 10uF will be better since the high-pass filter corner frequency is increased. This will help remove any startup noise that occurs below the cutoff frequency set by the DC blocking capacitor.

    Best Regards,
    Matt
  • Hi Matt-san,

    Thank you for your reply.
    I understood.

    Best regards,
    Kato