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TDA4VM: PTPS65941212RWERQ1sometimes has no output

Menghai Zhao
Intellectual 410 points

Part Number: TDA4VM

Dear Expert,

      We tested the TDA4 by "power on--power off--power on--power of" cycles and found that sometimes the pmic(PTPS65941212RWERQ1) has no voltage output, failing to supply powers for TDA4. How could i do?

  • 0
    Intellectual 410 points

    Hi Menghai,

    Can you please share some details? Is the board not powering up at all?
    Also, can you share what operations led to this failure?

    Regards,
    Parth

    The board is powered up but the PMIC lost the voltage output for TDA4. Even I added a dead-loop at the start point of main() function, this phenomenon still hanpped. So how to checked what happened in the PMIC?

  • 0 in reply to Menghai Zhao
    TI__Guru 57695 points

    Note the PMICs have safety features which will detect if residual voltage is present on the power rails, and if so - will detect as an error not not power up.  If power cycling quickly - this could be the issue.