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LM4674SQ EMI issue

[FAE] Andrew Wang
Genius 10685 points
Other Parts Discussed in Thread: LM4674

Hi Team,

Advantech met EMI failure issue when using LM4674, they are doing filterless config, didn't mention how long is from their output to speaker.

I suggest to add LC filter at amplifier output.

Customer would like to know if TI has any test rule or suggestion for LM4674SQ output to speaker distance? Based on experience is also fine, thanks.

Andrew

  • 0
    TI__Mastermind 20085 points
    Hi Andrew

    Most of TI's Class-D amplifiers can operate without filter when speaker wires are less than 10 cm. But It is always recommended to add an LC filter when the device has EMI issues.

    Best Regards
    Jose Luis Figueroa
    Audio Applications Engineer | A-Team