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OPA1622: OPA1622-Noise

switch
Expert 1955 points
Part Number: OPA1622

Hi Ti Team，

My Customer have a new project(Headphone),The main control QCC5126 will interfere with OPA1622 and emit a sizzling sound.

Is there any solution?Below is the schematic

  • 0
    TI__Genius 13830 points

    Hello,

    My apologies, I don't see The main control QCC5126 on the schematic. Can you point this out to me on the schematic?

    Is the customer hearing this noise with the chip powered up and no audio passing through? Is this noise coming from the LM27762DSS Amp Power circuit? Have they tried powering the OPA1622 circuit up with a different power supply so that we can isolate the problem?

    Any further details that can be provided will help for debugging this issue. An oscilloscope capture of the supply line and the output would be helpful so that we can identify the frequency of the noise coupling through.