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Original question:

[FAQ] How do I earn and understand user points on E2E™︎ support forums?

LP876242-Q1: Is my PMIC dead?

Tim Teuber
Intellectual 390 points

Tool/software:

Hi Team,

i am currently working on a application, where the LP876242 is used. For monitoring purposes, the Supply Voltage VCCA=5V is applied to GPIO8 on the circuit i am working on. When powering the PMIC when its unconfigured the IC is drawing a relatively high current (200mA, so 1 Watt) and its getting hot very quickly.

I am currently trying to program the NVM of the PMIC. For this i use the LP876242Q1-EVM and the Scalable PMICs GUI. I removed the PMIC on the Evalboard and connected the SPI Pins of the PMIC from the design i am working on with the SPI Pin Headers of the Eval Board.

So far, the GUI is able to connect to the PMIC, but when i am trying to read out the Registers, all of them are set to 0xFF. I am also not able to program the NVM of the PMIC, It gets stuck on validation.

Is it possible that my PMIC is dead from the 5V applied to the GPIO8, before its configured for example as a Voltage Monitor?

Best regards,

Tim

  • 0
    TI__Genius 16980 points

    Hi Tim,

    Applying 5 V on GPIO8 should be issue. So are you using LP876242B0RQKRQ1 device ? before reprograming it with another NVM configuration?

    So if you do not connect your own PCB, does the device properly function EVM?

    Regards,

    Ishtiaque