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Original question:

TAS6424R-Q1: SERIAL AUDIO PORT for tR/tF timing requirement

TAS6424R-Q1: pi LC filter design requirement for PVDD/VBAT power supply

wu yujiao
Prodigy 130 points
Part Number: TAS6424R-Q1

Tool/software:

Hi TI Experts

I would like to evaluate pi LC filter design for TAS6424R PVDD/VBAT power supply, now I hope TI help to tell me how to evaluate pi LC filter design for PVDD/VBAT?

the pi LC filter is supposed to pass CISPR 25 Class 4 requirement, how to evaluate the proper inductance value and the proper capacitance value of pi LC filter?

use case: 14 pieces TAS6424R chips on one PCB board, output power is 25W per channel at 4ohm load.

  • 0
    TI__Mastermind 48780 points

    Hi Yujiao

       Based on our testing, the PI filter would only affect very low frequency band of EMC results, it's parameter is not very important. Customer could follow our EMC board design, which as below.

      Inductor could use around 1uH.